Software Engineer - National Security & Defence

UK-Based | Hybrid and Secure On-Site Working | eDV Clearance Required

Solve complex engineering challenges that help protect the UK.

We’re recruiting Software Engineers to join a high-impact engineering team operating at the heart of the UK’s national security and defence mission. You’ll work on sophisticated, mission-critical systems that support real-world operations, collaborating with experts across engineering, intelligence and defence.

This is a role for engineers who want to work on problems that genuinely matter - in an environment where quality, security and rigour are paramount.

The Role

As a Software Engineer, you’ll design, develop and maintain secure, resilient and scalable software solutions for some of the most sensitive and challenging technical environments in the UK. You’ll work within multidisciplinary teams that include systems engineers, analysts, data specialists and security professionals.

Engineering excellence, attention to detail and collaboration will sit at the core of your day-to-day work.

What You’ll Be Doing

Designing, developing and maintaining secure software components used in operational defence systems

Contributing to technical design and architectural decisions

Writing clean, robust, well-tested code for highly secure environments

Working with cross-functional teams including systems engineers, cyber specialists and mission domain experts

Supporting continuous integration and deployment pipelines in restricted environments

Troubleshooting complex issues across distributed systems and secure infrastructures

Applying strict security, coding and compliance standards

Documenting designs, processes and configurations to a high level of rigour

Working exclusively on secure networks within SCIF/SPOF environments

What We’re Looking For

Essential

Active eDV clearance (UK Enhanced Developed Vetting) - mandatory

Strong background in software engineering across design, build, testing and deployment

Experience in one or more core languages (e.g. Java, Python, C++, C#, JavaScript )

Understanding of secure software engineering principles

Experience working in environments with strict security, audit or compliance requirements

Familiarity with CI/CD tooling and version control (Git)

Comfortable working on-site in secure facilities

Strong communication skills and ability to work collaboratively with multidisciplinary teams

Desirable

Experience working in UK defence, intelligence or national security organisations

Knowledge of containerised or distributed systems (Docker, Kubernetes)

Background in data engineering, pipelines or real-time processing

Exposure to event-driven architectures or messaging systems

Experience with infrastructure-as-code or secure cloud/on-prem hybrid solutions

Interest in emerging technologies, high-assurance systems or applied cryptography

Who This Role Suits

You’ll be a great fit if you:

Want to work on meaningful problems with real-world national security impact

Thrive in structured, mission-driven environments

Enjoy solving complex technical challenges under high assurance constraints

Take pride in delivering high-quality, secure and reliable software

Are comfortable working full-time in high-security spaces

What’s In It For You

Purpose-driven work supporting national security and public safety

Access to unique and complex engineering challenges found nowhere else

Opportunities for progression into technical leadership, architecture or specialist roles

Training and development pathways tailored to secure-environment engineering

Supportive engineering community with strong knowledge-sharing culture

?? Interested?

If you’re an experienced Software Engineer with active eDV clearance and a passion for impactful engineering, we’d love to hear from you.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason , please let us know when you apply or talk to the recruiters directly so we can support you.

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Senior Software Engineer - Bazel / Java We are seeking a collaborative and curious backend Engineer to help drive and develop the next generation of developer infrastructure and tooling as we establish a unified, robust and scalable monorepo ecosystem for all engineers at Spotify.. This role helps to support VCS and CI systems in addition to a Fleet Management product for helping developers at our client manage large scale software changes. In the last year, we have invested a huge amount of time and effort into the next steps of that and our migration towards monorepos. The role is located in our Platform Developer Experience (PDX) R&D Studio. The PDX R&D Studio oversees and owns cross discipline infrastructure that cuts across all engineering at our clent including our VCS, CI systems and beyond. YOU MUST HAVE EXPERIENCE WITH BAZEL TO BE CONSIDERED FOR THIS ROLE Role Duties Bring your experience and knowledge of working with Bazel and scaling monorepos to millions of lines of code to help us rethink the future of backend engineering at Spotify Help us migrate to, in addition to own and maintain Bazel and any related abstractions built to improve the developer experience Collaborate with our adjacent infrastructure teams across the company to develop what a best in class monorepo experience means Essential Skills Strong passion for making developers highly productive Experience developing and maintaining tools for large monorepo-based codebases Excellent problem solving skills Experience working with the Bazel build system and its ecosystem (e.g: rulesets such as rules*jvm*external, IntelliJ Bazel plugin, etc.) Fluency in Java, Python, Starlark and TypeScript This contract role can be worked fully renmotely but you must be based in the UK. I have interview slots ready to be filled so dont delay and apply ASAP to be considered. Randstad Technologies is acting as an Employment Business in relation to this vacancy. TPBN1\_UKTJ

Location: Leeds City Centre (Hybrid) We are working with a technology organisation delivering complex, large-scale digital solutions across sectors including energy, automotive, agriculture and regulatory environments. They are looking for a Senior Software Engineer to join their team in Leeds, helping design and deliver modern software applications using cloud-native technologies. The Role You will work across the full software development lifecycle , collaborating with delivery managers, test engineers and other developers to deliver secure, scalable software solutions. Responsibilities include: Leading technical delivery within an Agile development team Designing, developing and unit testing high-quality software Working with stakeholders to define requirements and acceptance criteria Contributing to estimation and technical planning Supporting and mentoring less experienced engineers Technology Required: C# JavaScript or TypeScript Cloud development (Azure preferred) Agile development environments Desirable: Angular, React or Vue SQL Benefits 25 days holiday plus bank holidays Private healthcare Pension matching up to 6% Dedicated career coach Discretionary annual bonus Cycle to work scheme Volunteering days Regular social events TPBN1\_UKTJ

Senior Full Stack Engineer - UK (Remote) - £60k-£70k I'm working with a UK-based organisation that is building a secure, offline-capable property visiting platform using modern Microsoft technologies. They are looking for a Senior Full Stack Engineer to play a key role in delivering the first iteration of a strategic cloud platform that will expand under a 'fail fast' innovation model. This is an excellent opportunity for a senior engineer who thrives in structured, security-focused environments and enjoys building clean, scalable systems from the ground up. The Opportunity You'll join a senior engineering team delivering a greenfield platform consisting of a .NET MAUI mobile application (iOS & Android), an Angular 21 web application, and Azure-hosted backend services built using clean architecture principles. Reporting into technical leadership, you'll contribute to architectural decisions while remaining hands-on across backend, frontend, cloud infrastructure, and mobile. This is a role for someone who thinks architecturally but delivers incrementally, maintaining high standards for quality, security, and performance. The initial programme will establish the engineering standards and cloud foundation that future products will be built upon. Key Responsibilities You will be responsible for: Writing production-quality, well-tested, secure code across backend, web, and mobile Designing and building RESTful APIs using clean architecture principles Developing offline-first mobile functionality using .NET MAUI Building secure Angular 21 frontends using strict TypeScript and MSAL authentication Implementing Infrastructure as Code using Bicep Deploying and managing Azure-hosted services using enterprise DevOps practices Integrating Azure Entra ID authentication and role-based authorisation Collaborating closely with Product, UX (Figma), and QA teams Challenging ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10 / ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights) Infrastructure as Code (Bicep) Azure Entra ID (authentication & RBAC) NUnit (backend and mobile testing) Vitest & Playwright (frontend and E2E testing) Desirable Experience: Power BI report templating Azure Fabric / Data Lake familiarity Geospatial or mapping APIs (Google Maps preferred) iOS exposure (ARKit / LiDAR / sensor APIs) Experience in regulated or security-sensitive environments What They're Looking For At least 5 years' commercial software engineering experience Strong expertise in modern .NET Proven experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural standards Clear and confident communication skills Highly desirable: experience with DevExpress / DevExtreme. Why This Role? This is a rare opportunity to shape a foundational cloud platform from day one using the latest Microsoft stack. You'll work in a disciplined, enterprise-grade engineering culture where security, performance, and quality are non-negotiable - while also contributing to a wider innovation strategy that will evolve beyond the initial product. If you're open to a confidential discussion, apply now and I'll be in touch. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website. TPBN1\_UKTJ

When registering to this job board you will be redirected to the online application form. Please ensure that this is completed in full in order that your application can be reviewed.

Within your role as aC++ Technical Lead, you will play a pivotal part in shaping the technical direction, engineering quality, and delivery excellence of a large-scale, mission-critical product ecosystem. No two days will look the same; you will influence a broad portfolio of projects while guiding engineering teams through complex technical challenges. You will join a highly capable department of more than 150 engineers, ranging from Graduates to Solution Architects, where you will provide leadership, mentorship, and technical authority across multiple teams. You will have a clearly defined progression framework, supported by ongoing professional development, architectural guidance, and opportunities to broaden your leadership impact.

As a Technical Lead, you will oversee the design, implementation, and optimisation of advanced C++ solutions, ensuring our systems remain robust, scalable, and aligned with best-in-class engineering practices. You will work closely with cross-functional teams to refine architectures, drive technical decision-making, and unblock complex engineering challenges. Alongside hands-on technical oversight, you will champion engineering excellence across code quality, performance, security, and maintainability, while supporting and developing the next generation of engineers through structured coaching and collaboration.

At Microlise, we recognise the importance of balance. Our flexible ways of working and low-overtime culture reflect our commitment to supporting engineers in doing their best work sustainably demonstrated by our average tenure of over seven years. If you are a technically strong, forward-thinking leader ready to take on a high-impact role, we would love to hear from you.

Ways of Working

• Monthly:Drive technical strategy across stakeholder demonstrations and product reviews; shape and validate architectural decisions; support release cycles with senior-level oversight; produce high-quality technical reports; contribute to mobile and platform-level engineering initiatives; and provide thought leadership across ongoing projects
• Fortnightly:Lead planning sessions, retrospectives, and sprint reviews, ensuring teams are aligned with architectural standards and delivery priorities. Facilitate technical discussions that influence design direction and continuous improvement across multiple teams
• Weekly:Guide public code reviews, support engineering dojos, and refine system-level design decisions. Coach teams in adopting modern engineering practices, improving code quality, and enabling a strong shared understanding of architectural principles
• Daily:Support daily stand-ups and unblock engineering teams; oversee complex debugging and performance optimisation; review and approve high-risk pull requests; drive reduction of technical debt; monitor system behaviour in production; and collaborate on design sessions, pair programming, and high-value engineering activities.

What Were Looking For

• A degree in Computer Science or a closely related technical discipline.
• Deep understanding of core computer science principles, with the ability to apply them at architectural and system-design levels.
• Extensive hands-on experience delivering high-quality, maintainable software in a commercial environment, ideally in a lead or principal-level capacity.
• Expert-level proficiency in modern C++ (C++11 and beyond), including memory management, templates, concurrency models, and performance-critical programming.
• Experience with C# and the wider .NET ecosystem is highly advantageous, especially where systems require cross-language integration or sophisticated tooling support.
• Strong experience operating within a mature software development lifecycle, including leading code reviews, facilitating design workshops, and influencing technical direction.
• Deep understanding of object-oriented design, SOLID principles, and the ability to architect extensible and robust software systems.
• Proficiency in SQL and Microsoft SQL Server, capable of analysing performance, optimising queries, and collaborating effectively with data specialists.
• Strong background in building and maintaining comprehensive unit and integration test suites across complex, multi-layered systems.
• Working knowledge of software design patterns, performance optimisation strategies, and tooling for high-throughput or low-latency environments.
• Demonstrated experience mentoring and developing engineers at all levels, providing strategic technical guidance and supporting growth across multiple teams.
• A collaborative and influential communication style, fostering a culture of engineering excellence, continuous learning, and shared ownership.
• Highly motivated, proactive, and passionate about technology, with a commitment to driving quality, innovation, and organisational improvement.

Why Microlise?

Proudly Midlands-based, Microlise has been operating for over thirty years, and recently became a Publicly Listed Company with shares trading on the London Stock Exchange. Our growing business is guided by our culture which drives the way we behave, the way we work, the way we connect with our customers, and the way we support and develop our people.

• Full support and training to ensure you are well equipped to succeed in your role
• Access to our salary sacrifice EV Car Scheme - payments are made before tax and other contributions, so saving you money, whilst doing your bit for the environment!
• Great Place to Work certified We have been recognised by the global authority on workplace culture, so come be a part of our success!
• Private medical insurance with Vitality Health including rewards for members such as: Free Amazon Prime, Apple Watch, discounted gym membership and many more!
• 25 days holiday, excluding bank holidays, increasing with service
• Invested in employee health and well-being with over 20 mental health first aiders in the business
• Employee Assistance Programmes
• Free Costco membership, 20% off EE mobile and line rental, and other local discounts
• Great staff extras: Easter eggs, yearly BBQ, Christmas gifts and annual staff awards
• Free Microlise Cresswell Racing Tickets, support British Superbikes
• Executive Box at Motorpoint Arena Nottingham

Recruitment Process

For successful candidates, interviews will take place whilst the advert is still live; so dont delay getting your application in!

Job Title: Software Developer (.NET / SQL) - Junior / Mid-Level

Location: Hull, UK (Hybrid / Office)

Salary: £26,660 - £32,000 per annum

Job type: Full-time, Permanent

Reality Solutions is a leading regional IT Solutions Provider and Sage Accredited Business Partner based in Hull. We are looking for a Software Developer with experience in VB.NET and/or C#.NET to join our development team. You will work on internal and client-facing business systems, contributing to both ongoing product development and new feature delivery.

About the role

This role suits a developer with solid foundations in .NET and SQL who is comfortable working across backend logic, database interaction, and supporting user-facing applications. You will be involved in maintaining existing systems while also helping modernise parts of the platform over time.

Key Responsibilities:

Develop and maintain applications using VB.NET and C#.NET

Design, write, and optimise SQL Server queries and stored procedures

Implement new features and improve existing functionality

Debug, test, and resolve software defects

Work with internal stakeholders to understand business requirements

Maintain and improve legacy systems while contributing to modernisation efforts

Integrate with third-party systems and APIs

Contribute to documentation and handover processes

Follow version control and release procedures

About you

We are looking for a practical problem solver who can work through real business scenarios. You should be comfortable working with legacy code and improving it safely, and a clear communicator with non-technical stakeholders. We value attention to detail, ownership of delivered work, and a willingness to learn and expand into newer technologies.

Required Skills & Experience:

Commercial experience with .NET development (VB.NET and/or C#.NET)

Strong working knowledge of SQL Server and relational database concepts

Experience writing queries, joins, views, and stored procedures

Understanding of application debugging and troubleshooting

Familiarity with Git-based version control workflows

Ability to work independently on defined tasks

Good understanding of software structure and maintainability

Desirable Skills:

Experience with ASP.NET / .NET Core / Web APIs

Exposure to ERP or business management systems (Sage 200)

Experience integrating with REST APIs

Familiarity with Power Platform / Power Apps

Mobile development exposure (e.g., Flutter / Dart)

Cloud exposure (Azure or AWS)

DevOps or CI/CD pipeline familiarity

What we offer

Varied work across multiple business systems

Opportunity to modernise legacy applications

Exposure to full development lifecycle

Supportive team environment with room to grow

Healthy balanced work-life environment

Please click the APPLY button to send your CV and covering letter for this role.

Candidates with the relevant experience and job titles of; .NET Developer, C# Developer, VB.NET Developer, SQL Developer, Junior Developer, Mid-Level Developer, Software Engineer, Database Developer, and Backend Developer may be suitable for this role.

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Contract:9 Months (Renewable)

Location: Essex (near Basildon and Brentwood) Office based 4 days a week

Rate: £500 per day Inside IR35

One of the worlds leading engineering companies and a household name is seeking a Software Engineer, Backend Engineer to play pivotal role in driving the technical success in our backend teams.

Main Tasks & Responsibilities

Software Engineer Back End Java, Spring, GCP

Architect scalable, resilient, and secure backend solutions and oversee the technical completion of critical development tasks, often in ambiguous situations.

Ensure backend code and architectural reviews are aligned with organisational goals, facilitating productive technical discussions, and making decisions to resolve complex backend engineering issues effectively.

Support the technical direction for backend development, offering guidance to team members and exemplifying technical excellence in backend practices.

Collaborate with frontend, DevOps, and other engineering teams

Lead efforts to implement process improvements within backend development workflows, thereby enhancing productivity and output quality through innovation and collaboration.

Strong expertise in backend programming languages (e.g., Java, Python, Go, Node.js) is essential, alongside responsibility for creating and reviewing technical designs for complex backend systems that meet both business goals and technical feasibility.

Manage relationships with key stakeholders, balancing their needs with technical constraints, and facilitating open technical communication are also crucial aspects of this role.

Essential Skills & Experience:

Software Engineer Back End Java, Spring, GCP

Extensive multi-year engineering experience specialising in designing, developing, and maintaining robust backend systems and services.

Expertise in version control systems (e.g., Git/GitHub) and CI/CD tools (e.g., Cloudbuild), including defining and optimising pipelines for backend deployments.

Proven proficiency with cloud platforms, particularly GCP, including experience with infrastructure as code and cloud-native services.

Demonstrated leadership and practical experience in architectural practices, including designing scalable, resilient, and secure backend solutions.

Customer-focused with a strong commitment to team collaboration and driving successful outcomes.

Strong drive for delivering high-quality, performant, and value-added results.

Demonstrated commitment to quality assurance and adherence to delivery timelines.

Ability to autonomously manage multiple complex assignments with minimal direction, providing guidance to junior team members.

Ability to thrive and contribute effectively within a highly regulated, financial environment.

Willingness to be flexible in terms of tasks and timings to meet project demands.

Significant experience performing and leading development reviews, ensuring code quality, maintainability, and adherence to best practices.

Expertise in Test Driven Development (TDD) and Behaviour Driven Development (BDD) methodologies for backend services.

Strong appreciation and practical application of architectural standards and processes essential in large-scale organisations.

Extensive experience or deep exposure to the following technologies:

o Java

o Spring Boot

o JUnit

o GCP (Google Cloud Platform)

o GitHub

o Jetbrains products (e.g., IntelliJ IDEA)

o Fossa (or similar open-source licence compliance tools)

o SonarQube (or similar code quality analysis tools)

o Checkmarx (or similar static application security testing tools)

o Cycode (or similar software supply chain security platforms)

Desirable (not essential) Skills:

Software Engineer Back End Java, Spring, GCP

~ Finance or consumer lending background

~ Experience with regulatory compliance requirements (FCA, PRA guidelines)

Java Software Engineer Contract Leeds or Croydon (Hybrid 2 days onsite per week) Up to £600 per day Inside IR35 6-month contract Requires Active SC An experienced Java Software Engineer is required for an initial 6-month contract supporting a major digital and cyber programme operating within complex, high-security environments. This role offers the opportunity to work on critical backend services, improving automated testing and code quality within an established engineering team. The position is hybrid , with 2 days per week onsite in either Leeds or Croydon , and offers a day rate of up to £600 (Inside IR35) . The Role This role focuses on strengthening backend service quality through improved automated testing and engineering best practices. The successful contractor will work closely with software engineers and requirements owners to increase test coverage, reduce defects, and improve maintainability across existing services. Key Skills & Experience Strong Java development experience (Java 17+) Experience with JUnit 5 and modern Spring / Spring Boot (3.x) Strong understanding of automated testing frameworks and strategies Experience improving test coverage and quality within backend services Knowledge of modern testing tools such as TestContainers or similar Ability to refactor production code to improve testability Experience working in collaborative engineering teams Strong ability to interpret and challenge functional and non-functional requirements Experience estimating work and delivering against agreed timelines Strong communication and technical discussion skills TPBN1\_UKTJ

Software Engineer - Active SC, Java, Microservices Up to £550 per day (Inside IR35) London / Remote 6 months My client is an instantly recognisable consultancy who require a strong Software Engineer with Active Security Clearance (SC) and with deep expertise in Java (Spring Boot) to join a large-scale, business-critical microservices programme. Key Requirements: Proven experience working as a Java Software Engineer on large microservice architectures Active Security Clearance (SC) Strong capability building scalable RESTful APIs and backend services in Java (Spring Boot): Postgres (or other relational SQL databases) with solid understanding of schema design and SQL Docker: Confident containerising and deploying applications Test-Driven Development (JUnit & Mockito or similar testing frameworks) CI/CD: Hands-on experience with Jenkins or similar automated pipeline tooling Flexibility working in agile teams and collaborating closely with engineers, product, and design colleagues Nice to have: API Specification using Swagger / OpenAPI Gradle build systems Liquibase (or similar) for database versioning/migrations Kafka or similar event-streaming platforms React and Typescript If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk TPBN1\_UKTJ

Hybrid (2-3 days onsite, Central London) | £75,000 - £85,000 + benefits A high-growth technology company operating at the intersection of real-time data, analytics, and cutting-edge product development is entering an ambitious expansion phase and is looking to hire a Senior Software Engineer to play a key role in its next stage of growth. This is an opportunity to work on mission-critical, real-time systems used at scale, with genuine ownership across architecture, development, and delivery. The role is hands-on, commercially focused, and suited to someone who enjoys solving complex technical problems in a fast-moving environment. What you'll be working on Building and evolving high-performance, real-time platforms that process and deliver live data Developing production-grade systems end-to-end, from requirements and design through to deployment and support Working across modern backend and frontend technologies, contributing to system architecture and scalability Collaborating closely with product and commercial stakeholders to deliver features that matter Supporting live systems, including participation in an out-of-hours support rota Tech environment You'll be working in a modern, cloud-based stack that includes: Backend & Frontend: Python, TypeScript, Golang, Node.js, JavaScript, React Data: PostgreSQL and NoSQL databases Cloud & DevOps: AWS, CI/CD pipelines, Terraform (desirable) Tooling: GitHub, Slack, Trello, Notion Experience with real-time systems (such as betting, trading, finance, or high-throughput data platforms) is highly advantageous, as is any exposure to data science, machine learning, or wearable/sensor technologies. What they're looking for 5+ years' experience in commercial software development Strong system design skills and the ability to work within a wider architecture A delivery-focused mindset with high standards for quality and reliability Comfortable working in both project delivery and live support environments Able to communicate complex ideas clearly to technical and non-technical audiences Self-motivated, adaptable, and confident taking ownership The setup Hybrid role with 2-3 days per week onsite in a Central London office Full-time, permanent position Competitive salary £75k-£85k, depending on experience 25 days holiday, contributory pension, and the chance to grow with a scaling business If you're a senior engineer who enjoys real-world impact, technical depth, and ownership, this is a role worth exploring. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website. TPBN1\_UKTJ

Senior Software Engineer - Python - London Salary: Up to £90,000 Location: Hybrid 2 days per week in Canary Wharf (E14) Contract: Permanent, Full Time Interviews: WC 9th February Agency Partner: dcoded The Business dcoded are partnering with a high-growth Real-Time Data SaaS business based in London, operating across a variety of market which includes wellbeing technology and gambling . The company builds low-latency, data-intensive platforms that ingest and process real-time data at scale, supporting: The business is entering a significant growth phase and is expanding its engineering team. The Role We are hiring a Senior Software Engineer to work on external, customer-facing SaaS platforms not internal IT systems. This is a hands-on role covering the full development lifecycle, from system design and build through to deployment and production support, with a strong focus on reliability, performance, and commercial impact . Responsibilities Design and develop scalable components within a real-time SaaS architecture Deliver high-quality software to agreed timescales Build and execute tests to support stable releases Support production systems, including out-of-hours support on a rota Collaborate with product teams and third-party partners Essential Experience PostgreSQL and NoSQL databases Python is the core language TypeScript, Go, Node.js, JavaScript API-driven and distributed systems Desirable Experience Betting, gambling, or other real-time domains (e.g. trading, finance) DevOps, CI/CD, AWS, Terraform Exposure to data science, ML, or real-time telemetry Senior Software Engineer - Python - London TPBN1\_UKTJ

Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) This is a hybrid role, 3 days remote and 2 days in the office Our client actively encourages diversity, equality and inclusion within its workforce and welcomes applications from a diverse background, REC Solutions Limited does not discriminate in regards to age, gender, national origin, religion or any other basis. An excellent opportunity has arisen for a Senior Software Engineer C++to join a friendly team my client are a well-established exchange (FinTech, Financial Technology) based in the City. My client are working with some cutting edge technologies, this is an excellent opportunity to join an innovative, forward thinking company within the FinTech / Financial services space. The successful candidate will join a a supportive team, where my client aim to recruit the best people from all walks of life and diverse business backgrounds. If these sentiments align with your thinking, then my client could be the ideal place for you to develop your career. Benefits (not exhaustive list): Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) Competitive salary 25 days annual leave - not including bank holiday Private medical insurance Flexible working hours Company pension Group Policies Life Assurance, Income Protection and Critical Illness Discretionary bonus Share Incentive Plan Electric Car Scheme Enhanced Maternity and Paternity Policy Workplace Nursery Scheme Length of service holiday entitlement My client is an equal-opportunities employer. All applicants will receive consideration for employment without regard to race, gender, colour, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Job Overview: Senior Software Engineer C++(Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) In this role you will work with the Product team, Infrastructure team, and QA team, to produce high performance, low latency and highly reliable code. Your goal will be to develop software which can handle large amount of TPS to drive a highly efficient technology used by several markets around the world, including our own. To be successful in this role as a Senior Software Engineer C++, you will be a proponent of agile methodology and modern software best practices. You can produce detailed technical work in OOP and work with other members of the Development team to produce code of high-quality standards. Ideally, you should have worked in critical systems development in the past. Responsibilities and Duties: Senior Software Engineer C++(Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) Codes, tests, integrates, and documents software. Provides technical leadership to more junior employees and other teams. Apply principles and techniques of computer science, engineering, and mathematical analysis to the development of complex products. Participate as a Subject Matter Expert in internal review of software components and systems. Work on the hardest technical problems facing the company, often these problems are unusually complex and require the utmost creativity and innovation. Apply and champion the appropriate standards, processes, procedures, and tools throughout the system development life cycle to support the generation of technical engineering products. Keep abreast of technology trends and champion new ideas and process improvements. Required Skills/Experience 8 years development experience in >= C++11 and Boost creating performant, scalable applications. Exposure to real-time systems. By that we meansystems processingfrequenteventsin a timely manner. 5+ years of experience in networking (UDP, Multicasting, TCP, etc...), messaging, and algorithms. 5+ years of experience on Linux systems. Good understanding of modern development best practices and methodologies Python. Git. SQL. Knowledge of capital markets technologies, protocols, and standards such as FIX and SBE. Most importantly, a drive to solve complex technological and trading problematics with a great team of talented developers. Desired Skills/Experience Questdb Dolt Mindsetandmethodology This role involves working with a sophisticated and specialised platform. New joiners invest time in understanding the architecture and domain before making changes to the most critical components. Were looking for someone who enjoys that kind of deep learning and is keen to build long-term expertise that enables them to take on greater ownership and impact. Good team player Autonomous Good understanding of modern development best practices and methodologies Comfortable using Agilemethodology, including continuous integration, sprints, Jira and the relevant processes and workflow. TPBN1\_UKTJ

?? Software Engineer - Developer Infrastructure & Tooling (Platform Developer Experience) ?? About the Role We're seeking a curious, collaborative Engineer to help build the next generation of developer infrastructure and tooling You'll play a critical role in creating a scalable, unified monorepo ecosystem, enabling engineers across the organisation to work faster, collaborate better, and innovate with confidence. This is a high-impact contract role focused on developer productivity, platform scale, and long-term infrastructure evolution. ??? What You'll Do ?? Design and scale Bazel-based monorepos containing millions of lines of code ?? Lead and support the migration to monorepos, owning and evolving Bazel and associated tooling ? Create abstractions, workflows, and automation that significantly enhance the developer experience ?? Partner closely with platform and infrastructure teams to define and deliver best-in-class monorepo tooling ?? Influence the future of backend engineering by improving speed, reliability, and simplicity at scale ?? Who You Are ?? Passionate about making developers highly productive and empowered ??? Proven experience building and maintaining tooling for large-scale monorepo environments ?? A strong problem solver who thrives on complex infrastructure challenges ??? Hands-on experience with Bazel and its ecosystem (e.g. rules\_jvm\_external, IntelliJ Bazel plugin, etc.) ?? Fluent in Java, Python, Starlark, and TypeScript ?? Contract & Location ?? 6-month contract ?? Fully remote ?? £750 / per day ?? Working within an EMEA time zone to support global collaboration Randstad Technologies is acting as an Employment Business in relation to this vacancy. TPBN1\_UKTJ

Senior Software Engineer Salary: £75k-£110k (plus attractive bonus on top) Location: London or Leeds (relaxed about hybrid or remote working, if preferred) My client is a specialist provider of sports pricing and trading technology, developing advanced simulation-based models and risk tools that underpin the performance of major sports brands.

Role Overview Were looking for a Senior Software Engineer to join the Modelling & Data Engineering group at a rapidly expanding sports-technology business. This is a hands-on role in a fast-moving environment where youll help shape new modelling tools, improve existing systems, and contribute to the technical foundations that support the companys growth.

What youll be working on Developing high-quality, maintainable software using .NET technologies.

Taking ownership of greenfield initiatives, designing and building internal tools that support the companys modelling capabilities.

Helping to gather, process and structure the data that powers the modelling pipeline.

Introducing new technologies, improving architectural patterns and reducing technical debt to enhance performance and maintainability.

Collaborating closely with colleagues across the Modelling & Data Engineering function to manage the full lifecycle of internal tooling.

Qualifications Essential A degree in a STEM discipline (Computer Science preferred), or equivalent demonstrable programming ability.

Certifications or training aligned with the companys core tech stack (e.g., .NET, AWS).

Strong programming fundamentals, including data structures, performance-focused development, design patterns and SOLID principles.

Commercial experience working with .NET (ideally .NET 5+).

Good SQL knowledge and at least one year working with relational databases.

Experience with distributed streaming platforms such as Kafka.

Familiarity with in-memory storage solutions like Redis.

Hands-on experience with AWS services such as S3, Athena, ECS, CloudFormation, Lambda and CloudWatch.

Confident using Git in a multi-developer environment.

Background in systems integration, including APIs, networking and data migration.

A commitment to producing clean, well-documented, reproducible systems.

Strong communication, organisation and time-management skills, with the ability to work independently or as part of a team.

Analytical mindset and strong problem-solving ability.

Desirable Interest in US sports (NFL, NBA, MLB, NHL, NCAAB, NCAAF), Cricket, Tennis or Football.

Experience collaborating with Data Scientists or Data Engineers.

Comfort with mathematical concepts such as probability, statistics and matrix operations.

Additional notes While experience with C# is preferred, candidates with a strong Java background and relevant industry exposure - or a clear personal interest in betting, gaming or US sports - will also be considered.

TPBN1_UKTJ

C# .NET £75,000 + bonus + benefits Hybrid working Not every .NET role is the same. This is an opportunity to build and operate software that sits behind critical, real world infrastructure. High reliability. High scale. Proper engineering standards. We are looking for a Senior Software Engineer with strong C# and .NET experience to join a growing engineering function delivering complex, production grade systems. This is a hands on senior individual contributor role. No line management. Real ownership. What you will be doing \* Designing and delivering scalable, reliable software \* Owning complex backlog items from design through to production \* Writing clean, maintainable code aligned to strong engineering standards \* Contributing to technical direction and best practice \* Working closely with Product, Architecture and Engineering leadership \* Ensuring systems are observable, testable and production ready What we are looking for \* Strong C# and .NET experience \* Experience building scalable applications in complex environments \* Solid understanding of TDD and software quality practices \* Comfortable operating in CI CD driven environments \* Confident working across system design, implementation and production support Exposure to Python is a bonus but not essential. This role would suit a senior engineer who enjoys building robust systems rather than churning out features, and who wants genuine ownership without moving into people management. Salary £75,000 plus bonus and benefits. RSG Plc is acting as an Employment Agency in relation to this vacancy. TPBN1\_UKTJ

Software Engineer - Open Source Specialist Location: Gloucestershire Contract Type: Contract About the Role Guidant Global is partnering with our client to recruit an experienced Software Engineer with strong open‑source expertise. You'll join a small, highly skilled technical team delivering bespoke, open‑source‑driven solutions across multiple platforms, including cloud environments and disconnected networks. This role is ideal for someone who thrives in collaborative engineering environments, enjoys solving complex problems, and is passionate about building scalable, secure, and high‑performance applications. Key Responsibilities Develop high‑quality software for client projects, working individually or as part of a development team Collaborate with technical leads and product owners to interpret and deliver against technical requirements Engage directly with clients to gather requirements and propose innovative solutions Contribute to all aspects of the software development lifecycle Produce detailed technical documentation and design specifications Share expertise with colleagues, supporting a culture of continuous learning Work alongside or directly within client teams when required Drive improvements in development approaches, code quality, and delivery standards Required Qualifications Bachelor's degree in Computer Science, Software Engineering, or equivalent experience Proven experience contributing to or managing open‑source projects Experience & Technical Skills Essential Strong proficiency in Go, Python, or JavaScript Experience with Linux-based operating systems (RHEL, Rocky, Debian, Ubuntu) Hands‑on experience with Git and open-source platforms (GitHub/GitLab) Ability to build and deploy scalable applications or libraries Strong debugging, problem‑solving, and performance optimisation skills Understanding of open‑source licensing (MIT, GPL, Apache) Experience with cloud platforms such as AWS or Azure Ability to create clear, comprehensive technical documentation Experience working within development teams on both minor and major projects Background developing robust, scalable, secure enterprise systems Experience across the full software development lifecycle Ability to follow fast, iterative development approaches Understanding of build & release management using tools like Maven, NPM, PyPI, Ansible Experience using Atlassian toolsets (Jira, Confluence, etc.) Desirable Experience with containerisation and orchestration (Docker, Kubernetes) Understanding of Agile sprint planning and cross‑team collaboration Ability to take on technical leadership responsibilities Stakeholder engagement across technical and non‑technical functions Knowledge of CI/CD tools, scripting languages, database technologies, messaging technologies Experience with vulnerability research Behavioural Competencies Strong communication skills, able to engage effectively with both technical and non‑technical audiences Collaborative team player who shares knowledge openly Proactive approach to problem‑solving and client engagement Adaptable, innovative, and comfortable working in fast‑paced environments Why Join Through Guidant Global? Guidant Global is a trusted partner in connecting talented professionals with impactful, forward‑thinking organisations. We support you throughout the recruitment process, offering transparent communication and a people‑first approach. Guidant Global is acting as an Employment Business in relation to this vacancy

SQL Server and Infrastructure Engineer Northampton (Rural High-Tech Site) Full Time Permanent Office Based The Opportunity My client is a UK based innovator in advanced security and intelligence technology, designing and manufacturing products that are trusted by law enforcement and government agencies around the world. From Technical Surveillance Counter Measures (TSCM) and lawful interception to border security and specialist training, they deliver mission-critical solutions with precision and integrity. Their products have recently been recognised with a prestigious international industry award at a major counterespionage conference in the US. These are people at the very top of their field. They are now looking for a Database and Infrastructure Engineer to join their team at their rural high-tech headquarters near Northampton. This is a unique role that bridges Database Administration and Systems Engineering, built for someone who thrives on variety, ownership and real technical challenge. Please note this is a fully office based position and due to the rural location your own transport is essential. The Role You'll be responsible for the heartbeat of their customer platforms, keeping complex, high-availability systems running 24/7 for clients who simply cannot afford downtime. This is far more than a maintenance position. You'll be optimising performance, designing resilient architectures, and on occasion travelling internationally to support client deployments. Key Responsibilities Database Mastery: Performance-tuning and maintaining Microsoft SQL Server (Availability Groups and Replication), ensuring rock-solid reliability across all environments. Infrastructure Resilience: Configuring firewalls, VPNs and networking to deliver seamless, secure connectivity at all times. Virtualisation: Managing vCenter and vSphere environments that host mission-critical applications. Client Support: Providing technical expertise for internal systems and occasionally supporting international client installations when needed. Best Practice: Documenting processes and maintaining a standard of excellence across every deployment. What They're Looking For You're a pragmatic problem-solver who enjoys the variety of managing both the data and the infrastructure it lives on. You don't need to be handed a task list. You spot what needs doing and you get on with it. Essential Experience Strong proficiency in Microsoft SQL Server and preferably, but not essentially, also MySQL, with solid High Availability knowledge including Clusters, Replication and Galera. A firm understanding of networking and security (firewalls, VPN configuration), hands-on VMware experience (vSphere and vCenter), and a full UK driving licence. As the site is rurally located, your own transport is a must. Nice to Have Exposure to Neo4J or cloud technologies, knowledge of Linux (Ubuntu) and Active Directory, an interest in IoT protocols such as MQTT or LoRaWAN, IP camera systems, or experience delivering technical training to non-technical audiences. Why This Role? This is an environment where innovation is genuinely rewarded and your contribution is visible. The package reflects that. Reward: Competitive salary plus a Class A share reward scheme for exceptional contributors, company pension and financial planning services. Growth: Structured mentoring and a clear pathway into broader Cyber Security or Lead Infrastructure roles. Culture: A collaborative, open-door team where your voice carries real weight, built on three simple values: collaborative, supportive, innovative. Wellbeing: Health and wellbeing programme and free on-site parking. Purpose: You'll be working on award-winning, UK-designed products that have a genuine real-world impact on global security. Secure Today. Protect Tomorrow. Next Steps If you're looking for more variety, more responsibility and more meaning than a standard DBA or SysAdmin role can offer, we'd love to hear from you.

Graduate Software Engineer (2026 Graduate) Cheltenham £28,000 + Training + Progression + PensionAn excellent opportunity awaits a 2026 graduate pursuing a career in software engineering. This role offers exposure to varied projects, strong mentorship, and the chance to grow within an established software business known for developing graduate talent.This company is a small but well-established software house, highly regarded in the engineering sector for delivering bespoke in-house software solutions for complex electronics projects.In this role, you will join a tight-knit, experienced development team. After initial training to learn the company's products and solutions, you will begin contributing to hands-on support and development tasks, building new features, fixing bugs, and assisting on projects that deliver robust and reliable software to a global customer base. As a graduate engineer, you will receive strong mentorship from senior engineers as you transition into industry. This role is based in Cheltenham, five days per week, to provide consistent support and development.The ideal candidate will be graduating in 2026 with a background in computer science, electronics, or a similar field, and will be keen to pursue a career in software engineering. Candidates should have a solid understanding and practical experience with object?oriented programming, particularly C++. An interest in electronics, geometry, complex algorithms, or graphics will be beneficial.This is a fantastic opportunity for a graduate to gain broad hands-on experience, develop as a software engineer, and build a long-term career within a respected engineering business.The Role: Software development, maintaining and creating new features Exposure to real commercial projects, bug fixing, and team collaboration Extensive training, mentorship, and clear progression path Office-based in CheltenhamThe Person: 2026 Graduate, looking to pursue a career in software engineering Hands on expereince with C++, with a willingness to learn and grow Familiarity with Git and HTML is beneficial Looking to build a long-term career in software engineering Based in or around Cheltenham, Gloucester, Worcester. Rise Technical Recruitment Ltd acts an employment agency for permanent roles and an employment business for temporary roles. The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set and will be decided by our client, the employer. Rise are not responsible or liable for any hiring decisions made by the end client. We are an equal opportunities company and welcome applications from all suitable candidates.

Role: Senior SQL Server DBA/Developer

Location: Norwich (onsite)

Salary: Up to 55k DOE

I’m working on behalf of a well-established UK organisation specialising in financial data and technology solutions, seeking an experienced SQL Server Database Administrator to join its internal IT team. The business provides critical financial product data used by major banks, regulators and government bodies across the UK and has been a leader in financial data services for more than 30 years.

Reporting to the Software Development Manager, this role will focus on maintaining and developing database infrastructure, ensuring reliability, security and performance across key systems while supporting new product development.

Key Responsibilities

• Maintain and support existing SQL Server databases and infrastructure
• Develop database modules and software components to meet client requirements
• Design and propose database architecture and infrastructure improvements
• Produce and maintain technical documentation including standards and procedures
• Ensure development best practices including code reviews, testing and standards
• Mentor and support other members of the technical team

Experience & Skills Required

• Strong experience in a SQL Server DBA or similar role
• Proven experience with SQL Server (2014/2017) database development and management
• Solid understanding of database design and query optimisation
• Experience with C# .NET desktop development
• Strong analytical and problem-solving skills
• Excellent attention to detail and ability to work under pressure
• Strong communication skills and ability to work independently or within a team

Desirable Experience

• Knowledge of VB6, VBA or web technologies
• Experience with reporting tools, data warehousing or data mining
• Experience working within Agile development environments
• Exposure to financial services or financial products

Salary & Benefits

• Competitive salary depending on experience
• 25 days holiday + bank holidays (with additional long service entitlement)
• Birthday day off
• Enhanced workplace pension
• Employee Assistance Programme and 24/7 GP access
• Group life insurance
• Ongoing training and development opportunities
• Free onsite parking and electric vehicle charging points
• Locker rooms with showers
• Fully air-conditioned offices
• Staff perks including Monday treats and discounted local bus travel

Location: Leeds City Centre (Hybrid)

We are working with a technology organisation delivering complex, large-scale digital solutions across sectors including energy, automotive, agriculture and regulatory environments.

They are looking for a Senior Software Engineer to join their team in Leeds, helping design and deliver modern software applications using cloud-native technologies.

The Role
You will work across the full software development lifecycle, collaborating with delivery managers, test engineers and other developers to deliver secure, scalable software solutions.

Responsibilities include:

• Leading technical delivery within an Agile development team
• Designing, developing and unit testing high-quality software
• Working with stakeholders to define requirements and acceptance criteria
• Contributing to estimation and technical planning
• Supporting and mentoring less experienced engineers

Technology
Required:

• C#
• JavaScript or TypeScript
• Cloud development (Azure preferred)
• Agile development environments

Desirable:

• Angular, React or Vue
• SQL

Benefits

• 25 days holiday plus bank holidays
• Private healthcare
• Pension matching up to 6%
• Dedicated career coach
• Discretionary annual bonus
• Cycle to work scheme
• Volunteering days
• Regular social events

Senior PHP Developer Leeds (Hybrid Remote) - £55k

Flexible Schedule Accreditation and Certification Budget Modern Tech Stack Vue/Nuxt/Laravel/AWS

Ada Meher are commencing on a search for one of their fastest-growing clients in Leeds who are looking for a Senior PHP Developer to join them to work with the development team in their Leeds office on a variety of greenfield projects with testing and TDD in mind at the forefront of their processes. The right candidate will have experience with modern technology in the Vue/Nuxt/Laravel/AWS stack.

The company operate on a hybrid remote policy, asking employees to come into their central office space 1-2 times a week with flexibility to work the rest of the time remotely. The culture of the business is very much one of autonomy, allowing staff to deliver work on a schedule which suits them as long as the work gets done and to the right quality there is no issue.

Using a modern stack, including a Vue/Nuxt.js based frontend Laravel APIs, microservices, SOLID principles, AWS deployments and aiming to drive towards full TDD, the company take an active interest in their employee s development offering a budget set aside for pertinent courses and certifications. They are looking for Developers with a similar mindset who put personal development and keeping up to date with latest technologies at the forefront of their priorities.

To Be Considered:

• Expert experience in Laravel Development
• Experience working with either AWS & CI/CD deployments or JavaScript/Typescript (Vue/Nuxt) frontends
• Experience with Unit Testing or TDD
• Experience working in an Agile team
• Strong communication skills

If you d be interested in applying or just getting more information on the role please get in contact today.

We re expecting a high volume of applications for the Senior PHP Developer role so please don t hesitate!