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Discover the best Java jobs with Haystack, your go-to IT job board for top Java developer roles. Whether you're a junior, mid-level, or senior Java programmer, find exciting opportunities with leading tech companies. Start your Java career search today and connect with employers seeking skilled Java developers.
Tech Lead
Tech Mahindra
UK
In office
Senior
£60,000 - £70,000
RECENTLY POSTED
+11

JD:- Experience : 10+ years

* Strong telecom domain and VoIP experience

* Prepare Requirements gathering, Architecture, Software design, estimate and lead development team project releases

* Participate in requirements, architecture, design and test cases review

* Use the Spring Boot framework to design and implement microservices that interact with databases.

* Work with other developers, designers, product owners, and QA to design, develop, and implement software solutions.

* Write clean, efficient, and well-documented code that meets industry standards and best practices.

* Troubleshoot and debug issues in existing applications and provide timely resolutions.

* Stay up-to-date with emerging trends and technologies in software development.

* Be a great communicator because you will spend a lot of time communicating and cooperating with your team’s other developers.

* Perform unit and system testing.

* Must have: Proficient in spring boot & Java 8 advanced features

* Must have: hands-on MongoDB or any noSQL DB,

* RabbitMQ, Kafka, VerneMQ

* Hazelcast, Eureka, Grafana, Prometheus, Minio

* JVM troubleshooting

* Docker, Kubernetes

* RHEL, OpenShift

* Exposure to IoT or Telecom or WiFi domain is plus

* Java: JEE – Jain SLEE,JSR 289, JSR 309, EJB, Servlets, JMS, JMX, JDBC and XML

* VoIP: SIP/SIPS, RTP//RTCP/SRTP

* PSTN : SS7/Sigtran, ISDN, SBC

* Web Services - WS*

* HTTP and HTTPS

* Redundancy and Availability

* OS – Linux

* Scripts : PERL, Python and unix shell

* Application Server : OCCAS or Web Logic

Platform Engineer
SF Recruitment
Manchester
Fully remote
Mid - Senior
£85,000 - £100,000
RECENTLY POSTED
+4

Platform Engineer with key skills in AWS, Kubernetes, Docker and back end services (Python, node, Go etc) is sought on a remote basis by a high growth FinTech.

Working at the forefront of B2B Saas financial security this Platform Engineer will be working with a close-knit technical team to monitor, manage and improve business critical applications and infrastructure with the aim of facilitating improvements in application deployment & scalability.

This role would suit a DevOps or Platform Engineer with a solid background in software engineering and infrastructure who can bring experience working with the latest automation and config management tooling to create a fully automated deployment environment.

In return this Platform Engineer can expect a dynamic, engaging, R&D driven culture with extensive progression opportunities and the chance to own the platform functionality of this high growth business.

This Platform Engineer should have most of the following key skills:

  • Strong experience in owning scalability ideally within a product lead environment
  • Solid back end services experience - Go, Python, node etc)
  • IAC experience - Terraform, Ansible, Redhat etc
  • AWS exposure
  • Strong containerization experience - Docker, Kubernetes
  • Basic VM management experience
  • Experience delivering new tooling for infrastructures
  • Rational database exposure - Postgres, MySQL etc
  • An agile, flexible personality who feels comfortable working in a fast paced environment

This Platform Engineer will receive

  • Base salary of up to £100,000
  • Long term remote working (one day a month on site max)
  • Generous equity stake with a clear business exit strategy
  • Bonus scheme
  • Private healthcare
  • Flexible working hours
  • Clear progression and personal development opportunities
  • 25 days annual leave plus bank holidays
  • Private pension
  • Regular salary reviews

So if you are a Platform Engineer and like the idea of joining a market leading company that offers excellent project ownership skills within a collaborative, autonomous environment please apply now to be considered.

Platform Engineer
Remote
Linux, Java, Python, MongoDB, Postgres, automation, node, infrastructure, Kubernetes, ansible, AWS, Terraform, ansible

Senior Software Engineer
SoCode Limited
Cambridge
Hybrid
Senior
£90,000 - £110,000
RECENTLY POSTED
+3

Senior/Principal Software Developer £90,000 - £110,000 + benefits No Sponsorship Option Cambridge 3 days per week Senior Software Developer A global technology organisation developing advanced scientific and engineering software is looking for a Senior Software Developer to join its growing engineering team. Their platforms are used by organisations around the world to tackle complex technical challenges through high-performance software and modern digital technologies. The Role You’ll work alongside engineers, developers, and technical specialists to improve the performance, scalability, and user experience of enterprise software products used across multiple industries. Key areas include: Developing core components of enterprise software applications Improving platform performance, reliability, and scalability Contributing to cloud-based platform development Building modern web applications and enhancing UI/UX Collaborating with stakeholders to deliver new product features Maintaining high engineering standards through testing and code reviewsWhat We’re Looking For Strong C# / .NET development experience Experience with a secondary language such as Python, C++, C or Java Experience building browser-based applications (Blazor, HTML, CSS, JavaScript) Understanding of scalable and asynchronous application development Experience using Git, Azure DevOps, or similar development tools Interest in improving user experience and modern software architecture Opportunity to work on complex, high-impact software used by organisations globally, within a collaborative and technically driven team

AI Engineer
Tria Recruitment
London
Fully remote
Mid - Senior
£500/day - £600/day
RECENTLY POSTED

Tech Focus: Azure / OpenAI / Copilot

Rate: Inside IR35: £500-£600/day

Location: Fully Remote

This is a fantastic opportunity for an AI Engineer to join a global construction and property consultancy that has undergone significant digital transformation. The organisation has invested heavily in its digital and data foundations and now wants to accelerate its AI capabilities. They have already built an AI platform and identified use cases. They now need an engineer who can help bring them to life.

Although the journey has begun, this hire is critical. As the AI Engineer, you will be driving this forward. Taking a hands-on role in developing AI solutions from the ground up and establishing best practices, standards, and guardrails for future development.

The organisation wants to leverage AI to streamline processes, solve complex challenges, and deliver tangible business outcomes. They work exclusively within the Microsoft Azure ecosystem, so practical experience with AI tooling in a cloud environment is essential.

What We Are Looking For

  • Proven, practical AI development experience - building solutions that have delivered real business outcomes
  • Experience developing chatbots, agentic AI, or similar applied AI applications
  • Strong understanding of best practices, governance, and guardrails for safe and scalable AI adoption
  • Scripting experience - Python, R, or Java.
  • Hands-on experience with Azure cloud AI services, such as: Azure AI, Azure Machine Learning, Azure OpenAI (Open to candidates with equivalent experience in other cloud environments)
  • Experience with Copilot (or similar tools)
  • Experience with OpenAI models

Why This Role?

This is a unique opportunity to help to shape the future of AI for a global business and will give you an exceptional opportunity to further develop your skills and take more ownership.

If this sounds like the right fit and you’d like to find out more, please apply directly and we’ll be in touch.

Java Software Developer (Inside IR35) - Contract
Stealth IT Consulting Limited
Manchester
Hybrid
Mid - Senior
£476/day
RECENTLY POSTED
+12

Contract: 6 months (likely extension)

Rate: £476 per day (Inside IR35)

Location: Manchester 1 day per week onsite

Start Date: 1st April

Interview Process: 2 stages

Project: Large-scale public sector programme

Overview We are looking for experienced Java Software Developers to support a major digital transformation programme within the public sector. The role involves building secure, scalable services and contributing to a high-performing Agile delivery team.

Key Responsibilities Develop, enhance, and maintain Java-based applications and microservices.

Work within cross-functional Agile teams (Developers, BAs, QAs, DevOps).

Contribute to API development, integration, and backend service build.

Deliver clean, testable, maintainable code aligned with best practices.

Participate in code reviews, pair programming, and continuous improvement.

Collaborate closely with architects and technical leads to ensure robust designs.

Support release processes and CI/CD pipelines.

Essential Skills & Experience Strong commercial experience in Java (8 or 11+) .

Hands-on experience with Spring / Spring Boot frameworks.

Experience building RESTful APIs and microservices.

Good understanding of AWS, Azure, or similar cloud platforms .

Familiarity with CI/CD pipelines (Jenkins, GitLab, GitHub Actions, etc.).

Experience with TDD/BDD and unit testing frameworks (JUnit, Mockito).

Background in Agile/Scrum delivery environments.

Ability to work within secure, complex, large-scale government / enterprise settings.

Desirable Skills Experience with public sector or GDS-aligned projects.

Knowledge of Docker, Kubernetes, or containerised environments.

Exposure to messaging technologies (Kafka, SNS/SQS, RabbitMQ).

Understanding of monitoring/logging tools (ELK, Grafana, Prometheus).

Additional Information Role is Inside IR35 payable via umbrella.

Onsite requirement: 1 day per week in Manchester .

Must be eligible to work in the UK and pass standard BPSS checks.

TPBN1_UKTJ

QA Engineer (Automation)
esure
Reigate
Hybrid
Mid - Senior
Private salary
RECENTLY POSTED
+4

Company Description Ready to join a team that's leading the way in reshaping the future of insurance? Here at esure Group, we are on a mission to revolutionise insurance for good! We’ve been providing Home and Motor Insurance since 2000, with over 2 million customers trusting us to keep them covered through our esure and Sheilas’ Wheels brands. With a bold dedication for digital innovation, we're transforming the way the industry operates and putting customers at the heart of everything we do. Having completed our recent multi-year digital transformation, we’re now leveraging advanced technology and data-driven insights alongside exceptional service, to deliver personalised experiences that meet our customers ever-changing needs today and in the future. Job Description We are currently recruiting for a QA Engineer (Automation) to join our wider Digital & Technology team at esure. You’ll play a key role in delivering high‑quality, reliable software solutions by driving automation excellence, embedding a quality‑first mindset, and supporting our ongoing digital transformation. What you’ll do: Design, develop and maintain automated test suites using Java, Selenium WebDriver and Playwright Build and execute automated and manual tests for APIs, microservices and UI journeys Create and own end‑to‑end test strategies, plans and executable BDD specifications Validate event‑driven message flows using Kafka Support continuous integration and delivery pipelines in Jenkins, ensuring high-quality releases Collaborate closely within an Agile squad to deliver reliable, scalable software Drive continuous improvement across QA processes, automation frameworks and tooling Qualifications What we’d love you to bring: Strong experience in Java and building automation frameworks Expertise in API testing (RESTful services) and service‑level automation Hands‑on experience with Selenium WebDriver, Playwright, and solid working knowledge of TypeScript Experience with GitHub (branching strategies, code reviews, PRs) Exposure to cloud environments, ideally AWS, and containerised/Kubernetes-based systems Understanding of Kafka, microservices architecture and distributed systems testing Experience working in BDD (e.g., Cucumber) and Agile/Scrum environments Strong collaboration, communication and problem‑solving skills Additional Information What’s in it for you?: Competitive salary that reflects your skills, experience and potential. Discretionary bonus scheme that recognises your hard work and contributions to esure’s success. 25 days annual leave, plus 8 flexible days and the ability to buy and sell further holiday. Our flexible benefits platform is loaded with perks to choose from, so you can build a personal toolkit to support your health, wellbeing, lifestyle, and finances. Company funded private medical insurance for qualifying colleagues. Fantastic discounts on our insurance products! 50% off for yourself and spouse/partner and 10% off for direct family members. We’ll elevate your career with hands-on training, mentoring, access to our exclusive academies, regular career conversations, and expert partner resources. Driving good in the world couldn’t be more important to us. Our colleagues can use 2 volunteering days per year to support their local communities. Join our internal networks and communities to connect, learn, and share ideas with likeminded colleagues. We’re a proud supporter of the ABI’s ‘Make Flexible Work’ campaign and welcome you to ask about the flexibility you need. Our hybrid working approach also puts you in the driving seat of how and where you do your best work. And much more; See a full overview of our benefits here

Software Engineer
DWP Digital
Multiple locations
Hybrid
Mid - Senior
£55,000
RECENTLY POSTED
+5

Pay up to £59,813, plus 28.97% employer pension contributions, hybrid working, flexible hours, and great work-life balance.

DWP Digital - Build services that matter

We’re hiring software engineers with skills in both Java and JavaScript.

You’ll join one of our agile product teams working in areas such as Personal Independence Payment (PIP), Authentication, Identity & Fraud, or Accessibility. These teams build, run and continually improve large-scale, mission-critical services that millions of citizens rely on every day.

Whether it’s strengthening how people securely prove who they are, improving the reliability of payments, or making our services more inclusive, you’ll be delivering meaningful change at national scale.

You’ll design, build and support modern microservices and user-facing applications using Java, JavaScript and cloud-first technologies. Working alongside engineers, product managers, architects and analysts, you’ll tackle complex technical problems, shape how our platforms evolve and contribute directly to the stability and performance of our services.

If you enjoy solving real engineering problems and want your work to make a genuine impact, this could be the perfect next step.

What skills, knowledge and experience will you need?

  • Experience building software using Java (Java 8 or above), including evidence of working on large-scale, distributed systems where performance and resilience matter.
  • Understanding of RESTful APIs and microservice design including how to build and consume them effectively.
  • Experience with cloud environments such as AWS or Azure and familiarity with cloud-native principles.
  • Ability to work with JavaScript and build accessible user interfaces that are reliable and easy to maintain.
  • Experience using TDD/BDD to write clean, well-tested code that catches issues early.
  • Knowledge of working with SQL or NoSQL databases such as Postgres, MySQL or MongoDB.
  • Experience creating and maintaining automated test suites that support continuous integration and deployment.

You and your role

Our Senior Java Engineers to work with freedom and autonomy. We write code and make decisions which shape the future engineering landscape of DWP.

We develop, build and support products and applications as part of multi-functional agile delivery teams, alongside researchers, analysts, designers, architects, testers and more.

You’ll work across the full software lifecycle - from designing APIs to building user interfaces, to deploying and monitoring services in cloud environments. These aren’t small systems: you’ll be working with high-volume, mission-critical applications where performance, latency and security really matter.

You’ll join teams working in areas that play a critical role in supporting citizens securely and reliably. You can expect to be designing and building Spring Boot microservices, contributing to well-structured front-end applications and helping to shape patterns and reusable components that make our services consistent and robust.

This is a place where engineers own their services end-to-end and understand the real impact their work has. You’ll help maintain the operational stability pf the products you build, including working an in-hours support rota for troubleshooting issues or bug fixes.

You’ll succeed in this role if you enjoy solving complex technical problems, care about building great products and want to combine modern engineering practices with meaningful public-sector impact.

This role is more than ‘just writing code’. If you’re curious about how services behave in production, how to make them better, and how your decisions shape outcomes for millions of users then apply now and join our community.

Details. Wages. Perks.

Location: You’ll join us in one of our brilliant digital hubs in Birmingham, Blackpool, Leeds, Manchester, Newcastle or Sheffield, whichever is most convenient for you.

Hybrid Working: We work a hybrid model - you’ll spend some time working at home and some time collaborating face to face in a hub.

Pay: We offer pay up to £59,813. That’s £46,547 salary plus a Digital Allowance of up to £13,266 subject to our assessment of your capability at interview

Pension: You’ll get a brilliant civil service pension with employer contributions worth 28.97%, worth up to £13,485 per year.

Holidays: A generous leave package starting at 24 days and rising to 26 days after one year.

You can also take up to 3 extra days off a month on flexi-time. You’ll also get all the usual public holidays.

We have a broad benefits package built around your work-life balance which includes:

  • Flexible working including flexible hours and flex-friendly policies
  • Time off volunteering and charitable giving
  • Bring your authentic self to work with ‘I Can Be Me in DWP’
  • Discounts and savings on shopping, fun days out and more
  • Interest-free loans to buy a bike or a season ticket, so it’s even easier for you to get to work and start making a difference
  • Sports and social activities
  • Professional development, coaching, mentoring and career progression opportunities.

And we have an award-winning environment and culture:

  • DWP have been recognised as 2024 Diversity Employer of the Year at the Computing Women in Tech Excellence awards
  • Diverse and Inclusive Leadership at Digital Leaders Awards 2024
  • Commended as Best Place to Work in Digital category in the Computing Digital Technology Leaders awards 2025
  • Recognised as one of the Best Public Sector Employers at 2025 Women In Tech Employer Awards

Process

We know your time is valuable so our application and selection process is just two stages:

Apply: complete your application on Civil Service Jobs. There’ll be full instructions when you click through.

Coding test: sent and completed remotely

Interview: a single stage interview online.

Click APPLYfor more information and to start your application.

IT Systems Architect - Based Manchester (Hybrid)
PSD Technology Contracts Ltd.
Manchester
Hybrid
Senior - Leader
£90,000
RECENTLY POSTED

Our client is a leading specialist financial services provider currently building a technology hub in Manchester. They are seeking an experienced IT Systems Architect to provide technical leadership and architectural direction across key technology programmes.

About the Role

The IT Systems Architect holds overall technical authority for one or more programmes or Agile Release Trains, ensuring technical alignment, architectural governance, and successful delivery of business and technical outcomes. Working closely with other technology teams, you will ensure that architectural outcomes are withing required guardrails, shaping the Architectural Runway, guiding implementation, and championing best-practice architecture across the organisation.

This role requires deep expertise in SAFe/Agile architectural design, with the ability to operate flexibly within both Agile and Waterfall environments.

Key Responsibilities

  • Develop and continually refine the Architectural Runway, technical vision, and enabler epics for applications, data, and infrastructure.
  • Influence programme roadmaps and backlogs, preparing architectural outputs for Program Increment planning.
  • Promote and embed a scaled agility mindset, values, and practices across teams.
  • Drive measurable delivery velocity, best-practice adoption, and effective implementation of new designs.
  • Guide Developers, Engineers, BAs, BRDs, and Project Managers to ensure architectural alignment and technical coherence.
  • Collaborate with Technical and Enterprise Architects to ensure adherence to technical standards, frameworks, and methodologies.
  • Define and support requirements for system stability, technology upgrades, and pipeline improvements.
  • Enforce technical guardrails through effective design governance.

Skills, Knowledge & Experience

  • Expert knowledge of enterprise workflow systems, distributed architecture, and communication architectures.
  • Senior-level understanding of SDLC, architectural methodologies, and multi-platform environments
  • Strong experience with web-based, service-based, and enterprise application architectures.
  • Proven ability to manage code quality and ensure high technical standards.
  • Deep understanding of SAFe/Agile, Waterfall delivery, and incremental architectural enablement.
  • Excellent communication, coaching, negotiation, and stakeholder-management skills.
  • Experience defining architectural roadmaps.

Education & Technical Background

  • Strong technical delivery experience, including architectural methodologies (eg, TOGAF).
  • Architecture experience across platforms such as Java, .NET, Python, cloud environments, and tiered architectures.
  • Experience with insurance or finance-based products preferred.
  • Preferred certifications: ARCH, ASE, SDP.
  • Experience with Jira, Confluence, and LucidSpark would be beneficial.

This is an excellent opportunity for a seasoned IT Systems Architect to play a pivotal role in shaping enterprise-level solutions, driving architectural excellence, and contributing to the continued success of a global insurance organisation.

Staff Engineer - Permanent role (Java)
Nicoll Curtin Technology
London
Hybrid
Senior - Leader
£80,000
RECENTLY POSTED
+3

Staff Engineer - Java
London, UK (Hybrid - 3 days per week in office + occasional site visits)
Permanent
Full-time, 40 hours per week
Up to £80,000 + benefits

About the Role

We are seeking a highly skilled Staff Engineer with strong hands-on expertise across Java (17+), Spring Boot, Cloud Engineering, Automation Testing, CI/CD, and Kafka. This is both a delivery and technical-leadership position, requiring excellent engineering fundamentals combined with design/architecture experience.

You’ll work closely with cross-functional teams to build scalable, modern, cloud-native systems that support large-scale digital platforms. The role includes mentoring, setting engineering standards, and championing best practices.

Key Responsibilities

  • Design, build and maintain high-quality Back End services using Java 17+ and Spring Boot.
  • Lead technical design discussions and contribute to architecture decisions.
  • Implement strong automation testing practices (unit, integration, contract, performance).
  • Develop cloud-native solutions on Azure or AWS using CI/CD and DevOps tooling.
  • Build event-driven systems using Kafka, including schema evolution and resilient consumer patterns.
  • Mentor engineers and support best practice across coding, testing, and delivery.
  • Contribute to roadmap planning, technical direction, and continuous improvement initiatives.
  • Promote clean architecture, secure coding, observability, and engineering excellence.

Essential Skills & Experience

  • Java 17+, Spring Boot, and modern Back End engineering.
  • Strong automation testing experience.
  • Solid experience with Kafka and event-driven architectures.
  • Cloud engineering with Azure or AWS, CI/CD pipelines, containers, IaC exposure.
  • Strong understanding of architecture patterns: SOLID, Clean/Hexagonal Architecture, CQRS, resilience patterns.
  • Experience with DevOps principles and continuous delivery environments.
  • Exposure to mentoring/coaching other engineers.
  • Strong communication skills across technical and non-technical audiences.

Desirable Experience

  • Experience in large-scale digital platforms or complex enterprise environments.
  • Test automation frameworks (Playwright, Selenium, etc.).
  • Experience with NoSQL, caching (Redis), or enterprise integrations.
  • Familiarity with Java-adjacent tooling or light Front End literacy (TypeScript/React).
Senior Software Developer
Hunter Bond
London
Hybrid
Senior
£130,000
RECENTLY POSTED

Role: Senior Software Developer

Client: Financial Services Firm

Salary: £130,000 + Comps

Location: Hybrid (London)

Experience: Senior

A global financial services organisation is growing a senior Java engineering team to support a strategic, business-critical technology platform. This is a hands-on, senior level role suited to experienced engineers who enjoy working on complex systems while helping shape technical direction and engineering standards.

What we’re looking for

  • Strong Java Back End development experience (modern Java versions)
  • Background building high-quality, scalable applications in complex environments
  • Experience working closely with business-facing stakeholders
  • Comfortable operating at senior/VP level in a delivery-focused team

What you’ll do

  • Contribute hands-on to the development of a strategic enterprise platform
  • Help shape technical standards, design approaches and best practices
  • Collaborate with other senior engineers to drive platform quality and stability
  • Support the ongoing evolution of a long-term, globally used system

If this sounds like you, apply now!

Senior Firmware Engineer
Johnson Controls
Belfast
Hybrid
Senior
Private salary
RECENTLY POSTED
+2

What you will do

As a Senior Firmware Engineer, you will aid in the design, development, and maintenance of embedded firmware across a range of CEM Systems hardware platforms. You will work closely with hardware, software, and systems teams to deliver reliable, secure, and high-performance solutions used globally in critical infrastructure, airports, data centres, and enterprise environments. This is a hands-on technical position involving firmware design, secure solution development, problem-solving, and full product lifecycle support.

How you will do it

Embedded Firmware Development
  • Design,  implement and support firmware for embedded systems using RTOS-based environments.
  • Develop/maintain/debug multi threaded firmware applications using signals, semaphores, mailboxes, and other RTOS primitives to manage constrained resources.
  • Create clear, robust finite state machine logic for deterministic device behaviour.
  • Implement internal communication protocols including SPI, I²C, and other MCU subsystems.
  • Design for Security – develop firmware with latest cyber security practices at the core
Networking & Security Protocols
  • Develop and maintain embedded networking features using the ISO model, including TCP/IP, routing, subnets, client/server operation.
  • Integrate secure communication technologies including TLS (MBED, WolfSSL) and modern cipher suites such as AES, CHACHA20 along with SHA.
  • Work with access-control-specific communication standards, including OSDP for control panels and peripheral devices.
Smart Card & RFID Technologies
  • Implement and support smart-card reader technologies across ISO 14443A/B, ISO 15693, and related RFID standards.
  • Work with DESFire architecture, including AES and 3DES encryption modes, application identifiers (AIDs), and file structures.
  • Support legacy and proprietary card formats including MIFARE Classic, HID iClass, and customer-specific technologies.
Electronics & Hardware Interaction
  • Read, interpret, and collaborate using circuit diagrams and system schematics.
  • Understand power supply behaviour, electrical limitations, and protection considerations.
  • Work with RS485 asynchronous communications, Ethernet hardware, NFC antenna systems, relays, and FET-based output drivers.
Problem Solving & Technical Leadership
  • Conduct root-cause analysis across multi-component systems—both hardware and firmware.
  • Develop solutions that minimise collateral impact and maintain system stability.
  • Mentor junior engineers, perform code reviews, and contribute to engineering best practice.
What we look for

Essential

  • Ability to work in the office three days per week
  • Authorization to work in the UK
  • Proven experience designing firmware for embedded systems (ideally real-time / resource-constrained environments).
  • Strong proficiency in C, familiarity with C++ and JAVA is desirable.
  • Experience with a range od IDEs including Keil uVision, QT Creator, Android Studio and source control systems including Github and TFS
  • Experience with embedded Linux and Android operating systems desirable along with
  • Solid understanding of hardware fundamentals and microcontroller architectures.
  • Demonstrable experience with networking stacks and secure communication protocols.
  • Experience with smart-card or RFID technologies is a significant advantage.
  • Excellent analytical and debugging abilities, including use of oscilloscopes, logic analysers, and protocol tools.
  • Ability to work autonomously and collaboratively across multidisciplinary teams.
  • Familiarity with Mitsubishi PLCs desirable.
Desirable Experience
  • Experience in access control, security systems, or other safety-critical embedded environments.
  • Previous leadership/mentoring responsibilities.
  • Familiarity with compliance, certification, or regulated environments.

What we offer

  • Work on innovative, industry-leading security products used worldwide.
  • Join an experienced engineering team with strong technical depth.
  • Opportunities for technical leadership, architecture influence, and career progression.
  • Competitive salary, benefits, and flexible working options.

#LI-Hybrid

#GOSIA

Data & Integration Solution Specialist
Agincare Group
Multiple locations
Hybrid
Mid - Senior
£40,000
RECENTLY POSTED

Package Description:

At Agincare, we believe technology should enable exceptional care.As we continue our exciting journey of growth and digital transformation, were investing in our systems, data, and infrastructure to support our expanding services across the UK.

Were now looking for a Data & Integration Solution Specialist to play a pivotal role in shaping our evolving digital landscape.

This is a newly created role within our IT team a rare opportunity to build, influence, and future-proof our data and integration ecosystem from the ground up. With scope to lead a small team in the future, this role offers real impact, visibility, and progression.

Why join us?

As Agincares data and integration specialist, youll be at the heart of our digital transformation.Youll design and deploy integration solutions, build robust data pipelines, and support the development of Power BI reporting that helps our teams make smarter, faster decisions.

Youll work closely with stakeholders across the business, influence technical direction, and help create a future-proof architecture that supports our ambition.And as the role grows, theres potential to lead a small team giving you the chance to shape not just our systems, but our capability.

What Youll Be Doing

Integration Solutions
Design and implement robust integration solutions (APIs, ETL, microservices, ESBs), developing reusable patterns and frameworks to ensure secure, reliable, and scalable data exchange across enterprise systems.

Middleware & Platforms
Select, configure, and manage middleware/iPaaS platforms, optimising performance, availability, and security with strong monitoring and error-handling practices.

Data Architecture & Governance
Define data architectures, schemas, and ETL pipelines, embedding governance, quality, security, and lifecycle management to support both operational and analytical needs.

Power BI & Analytics
Collaborate with business teams to deliver high-quality Power BI dashboards and reports, designing optimised datasets that enable accurate, timely, data-driven decisions.

Stakeholder Engagement & Standards
Work with internal teams and vendors to align integration strategy with business goals, clearly communicating technical solutions. Produce robust documentation and establish best-practice standards for integration and data management.

Future Leadership
Mentor junior colleagues, with scope to line manage and grow a small team as the function develops.

What Were Looking For

  • Proven experience designing and implementing integration solutions (APIs, ETL, microservices, ESBs) in complex enterprise environments.
  • Hands-on expertise with middleware or iPaaS platforms.
  • Strong programming skills (Java, C#, Python or similar), with solid understanding of JSON, XML, REST, and SOAP.
  • Experience architecting and maintaining data pipelines, ETL processes, and data warehouse/schema design.
  • Skilled in Power BI (dataset design, modelling, report/dashboard delivery).
  • Strong understanding of data governance, security, compliance, and performance tuning.
  • Excellent communication skills able to engage confidently with both technical and business stakeholders.

This role can be based at any of our office locations in Portland, Poole, or Grantham.

About Agincare

Were a family run business thats been caring and supporting people since 1986. With over 4,500 team members, were one of the UKs largest care providers and are continuing to grow.We have over 100 locations across England including care& nursing homes, home care branches, extra care schemes, supported living properties and live-in offices.

Agincare are signatories of the Care Leaver Covenant and are committed to supporting care leavers to live independently.We are proud to be able to offer a guaranteed interview to care leavers, or an informal conversation about our career opportunities.

All of our care services are regulated by the Care Quality Commission (CQC).

Equal opportunities are important to us at Agincare and we welcome applications from all.

#LI-KD1

Mobile Backend Developer - Kotlin and java - Manchester, UK
Infoplus Technologies UK Ltd
Manchester
Hybrid
Senior
Private salary
RECENTLY POSTED

Role:Mobile Backend Developer - Kotlin and javaDuration: 6 MonthsLocation:Manchester, UK (3 days Hybrid)

The Role

Seeking a Senior Application Engineer ( Backend cloud based application development) with deep technical expertise and thought leadership. You will drive strategy for your area of expertise across teams and foster a developer community within your domain. The role involves mentoring junior staff, ensuring high-quality deliverables, promoting best practices like TDD and BDD, and leading engineering practices across the SDLC.

Your responsibilities:

  • Provide advanced technical expertise in Backend Development, supporting the team with effective solutions and practical insights.
  • Participate in all phases of the Software Development Life Cycle (SDLC), including requirements gathering, development, deployment, and ongoing maintenance.
  • Demonstrate a commitment to keeping up with industry trends, emerging technologies, and best practices, actively applying them in your work.
  • Contribute new ideas, tools, and methodologies to help foster a culture of continuous improvement and innovation within the team.
  • Share knowledge and mentor peers and junior engineers, supporting their growth and skills development.
  • Collaborate with technical leads, IT teams, and business stakeholders to understand project requirements, implications, and dependencies.
  • Review and provide feedback on technical documentation, suggesting improvements where appropriate.
  • Promote and practice best development approaches such as Test-Driven Development (TDD) and Behavior-Driven Development (BDD) to deliver high-quality, maintainable code.
  • Apply design patterns to address complex problems, ensuring code is efficient, readable, and reusable.
  • Adhere to IT and Information Security policies and procedures in all engineering activities.

Your Profile

Essential skills/knowledge/experience:

  • Preferred - Experience of building distributed scalable microservices using Java/Kotlin, Spring Boot, OAuth 2.0, Secure API design
  • Understanding of API design for mobile application with event driven architecture
  • Strong analysis and problem-solving skills
  • Knowledge of the financial services industry
  • Other technologies/areas: AWS, API Design, Automation testing
AI Semantic Architect
DXC
London
In office
Mid - Senior
Private salary
RECENTLY POSTED

Location - Erskine, Newcastle, Farnborough or London

Candidates are required to be eligible for clearance

What Youll Do

  • Design Ontologies: Develop and maintain ontologies using OWL/RDF to model enterprise data domains and relationships.
  • Build Knowledge Graphs: Create and manage enterprise knowledge graphs that unify diverse data sources.
  • Semantic Querying: Develop and optimise SPARQL queries for advanced data retrieval and analytics.
  • Ensure Data Quality: Implement semantic validation rules (e.g., SHACL, OWL constraints) for data integrity and interoperability.
  • Integrate with Enterprise Systems: Embed semantic models into data pipelines, APIs, and enterprise workflows.
  • Collaborate with AI Teams: Enable AI agents and LLMs to leverage ontologies and knowledge graphs for context-aware reasoning.
  • Adopt Best Practices: Stay current with semantic web standards and contribute to internal guidelines for semantic data management.

What Were Looking For

  • Education: Bachelors degree in Computer Science, Information Science, or related field.
  • Semantic Web Expertise: Hands-on experience with OWL, RDF, and SPARQL.
  • Knowledge Graph Experience: Practical experience with graph databases (Neo4j, GraphDB, Apache Jena, etc.).
  • Data Modelling & Integration: Strong understanding of data architecture and integration techniques.
  • Programming Skills: Proficiency in Python, Java, or similar for semantic data processes.
  • Analytical Skills: Ability to troubleshoot ontology logic and query performance.

Desired Experience

  • Familiarity with metadata standards (Dublin Core, schema.org).
  • Experience integrating semantic technologies with AI/LLM workflows.
  • Proven track record of embedding semantic layers into enterprise systems.
  • Hands-on with tools like Protégé, semantic reasoners, or cloud-based graph services (AWS Neptune, Azure Cosmos DB).

Why DXC Technology?
At DXC Technology, we help global enterprises run mission-critical systems and operations while modernising IT and driving innovation. Join us to work on impactful projects that shape the future of enterprise data and intelligent systems.

Android Engineer
Langham Recruitment
London
Fully remote
Mid - Senior
£90,000

Android Engineer | Remote | Up to £90,000 | SaaS

We are partnering with an innovative technology company building intelligent mobility platforms used by major public transport operators across the world.

Their technology powers mobile experiences that combine location intelligence, behavioural insights and rewards systems to help millions of people move through cities more efficiently while increasing public transport adoption.

They are now looking for an Android Engineer to help evolve the mobile SDK that sits at the core of this platform. This is a role for engineers who enjoy working close to the platform layer and solving complex mobile engineering problems at scale.

The opportunity

You will work on a mobile SDK integrated into partner applications used by large transport operators and mobility providers.
The work involves challenges such as location tracking, background processing, sensor data, reliability across many Android devices and building robust APIs that other developers depend on.
You will collaborate closely with backend engineers and product teams while also working directly with partners to design solutions that integrate seamlessly into real world transport systems.
What you will be doing

Design and build advanced Android SDK features using Kotlin and Java
Solve complex problems around location, background services and mobile performance
Build reliable APIs and tools that other mobile teams integrate into their applications
Collaborate with engineers across mobile, backend and infrastructure teams
Improve architecture, testing practices and developer experience
Support partners integrating the SDK into large scale consumer applications
Continuously improve performance, security and reliability across the platform
What we are looking for

Strong experience building Android applications in Kotlin or Java
Experience working on complex mobile systems such as SDKs, frameworks or large scale applications
Experience with reactive programming such as RxJava
Deep understanding of asynchronous programming and multithreading
Strong knowledge of Android architecture and platform capabilities
Experience working with APIs and network based mobile services
Comfortable working in collaborative agile teams
Strong communication skills and fluent English
Nice to have

Experience working with location services sensors or Bluetooth technologies
Experience working with cross platform mobile environments
Exposure to cloud services or backend development
Interest in on device intelligence or machine learning
Salary and Benefits

Salary up to £90,000
Remote working
Flexible working hours

Software Engineers
Forward Role
Gloucester
In office
Mid - Senior
£85,000
+2

Package - £55,000 - £85,000 (depending in experience level)

Benefits - DV Bonus plus excellent benefits

Clearance - Cleared to eDV level

Location - Cheltenham or Manchester

Join a trusted leader in National Security technology solutions.

Do you enjoy solving technical cyber problems and identifying vulnerabilities?

As part of our client’s expanding National Security division, you’ll contribute to high-impact missions across AI/Data Science, Cybersecurity, Cloud, DevOps, and Platform Engineering. We’re seeking inquisitive individuals who excel at dissecting technical systems, not just to understand how they work, but to identify weaknesses, assess risks, and develop mitigation strategies.

What You’ll Be Doing

  • Software analysis and reverse engineering of compiled or interpreted code that could be obfuscated or defensively structured, for either x86/x64 or ARM processor architectures.

  • Reverse engineering a wide range of technologies to uncover vulnerabilities and improve security including operating systems and/or firmware internals, security architectures and hardware abstraction.

  • Engineering software from design to delivery in modern IDEs and languages, using Agile delivery.

  • Creating tested and testable code. Integrating with automated verification systems, CI and CD pipelines.

  • Working closely with cybersecurity teams to prioritize vulnerabilities and implement patching strategies.

  • Collaborating in Agile teams to deliver innovative, secure, and robust technical solutions.

What We’re Looking For

  • Proficiency in one or more of C, C++, Java or C#.
  • Familiarity with scripting and automation using Python, Bash, Powershell or Groovy.
  • Experience working with IDA Pro or Ghidra for reverse engineering
  • Experience working with Linux or Windows-based systems.
  • Awareness of secure coding practices and modern cybersecurity threats.
  • Knowledge of principles used in Agile environments.

Desirable exposure

Any exposure of AI, ML, Cloud or Virtualisation would be considered a plus.

Clearance required

You will already hold an active eDV security clearance

This is an incredible opportunity to be at the forefront of National Security innovation. If you’re naturally curious, thrive in high-stakes environments, and want to make a real impact, apply today!

As an industry leading, nationwide Marketing, Digital, Analytics, IT and Design recruitment agency, we are continually receiving new assignments to work on, so keep a close eye on our website, Facebook, LinkedIn and Twitter pages for a full list of current permanent and interim opportunities as well as marketplace news and fun stuff.
Forward Role is operating as an employment agency.

Java Developer
Line Up Aviation
Gloucester
In office
Mid - Senior
£65/hour

On behalf of our client, we are seeking to recruit a Java Developer on an initial 12-month contract. In this role, you will be involved in the design and development of new and evolving software tools and architectures, as well as their implementation for future products.

Role: Java Developer
Pay: 65 per hour Via Umbrella
Location: Bristol
Contract: Monday - Friday 37 hours per week, 12 months contract
IR35 Status: Inside
Security Clearance: Security Clearance required to start

Responsibilities

  • Designed and developed software tools and architectures for next-generation Air Defence Systems.
  • Built robust applications in Java, with awareness of system-wide impact.
  • Worked across the full software lifecycle, from requirements to integration and testing.
  • Collaborated effectively within cross-functional engineering teams.
  • Contributed to safety-critical systems following standards such as DO-178C, DefStan 00-55, and IEC 61508.
  • Applied knowledge of Ada, DDS middleware, and Real-Time Operating Systems (RTOS).

Essential Skills:

  • Experience of working in Java (6+ years ideally)
  • Experience in other languages such as Ada
  • Knowledge of DDS middleware and Real Time Operating Systems
  • Knowledge of standards such as DefStan 00-55, DO-178C or IEC61508
  • Collaborative, open approach to development and have the ability to work well in a team and maintain momentum during development.
  • Experience of working across the entire software development process from engaging with requirement authorities to automated target integration and proving, supported with effective documentation
  • Experience of new tools, techniques and approaches that might enable us to evolve our processes to improve our efficiency and sustainability

If you are interested in applying for this position and you meet the requirements, please send your updated CV to: Natalie Dalkin at Line Up Aviation

Line Up Aviation has carved its own place in the recruitment of Aviation and Aerospace personnel all over the world for more than 30 years. We work with some of the industry’s best known companies who demand the highest standard of applicants.

" on Twitter for all of our latest vacancies, news and pictures from our busy UK Head Office. Interact with us using the tag at anytime! Thank you for your follow!"

Java Developer eTrading
Hays Specialist Recruitment Limited
London
Hybrid
Mid - Senior
Private salary

Join a leading independent technology and services provider as a Java Developer - e-Trading! Job OverviewJoin a fast-paced and highly collaborative eFX Quantitative Developer team within Global Markets. You'll help build and enhance a best-in-class eFX trading platform, working closely with quants and traders to drive automation, performance, and revenue. This role sits within the Principal Flow Trading stream and offers hands-on ownership of the full development lifecycle. Location: London (Hybrid) Daily Rate: Flexible Contract Length: Until Dec 2026 Start Date: ASAP Key Responsibilities Develop and enhance a low-latency, high-throughput eFX algorithmic trading platform Own initiatives end-to-end: analysis, design, implementation, delivery Design, implement, and back-test pricing and execution strategies Build analytics to monitor model and platform performance Enhance the proprietary eTrading framework used across Global Markets Collaborate closely with quants, traders, and technology teams in an agile environment Key Requirements Strong business knowledge of electronic trading, ideally eFX Proven experience building low-latency, event-driven algorithmic trading platforms Advanced Java expertise, including lock-free and low-garbage techniques Experience working with quant teams and implementing algorithmic models Familiarity with messaging protocols such as Aeron, Kafka, FIX, SBE, ITCH, OUCH Knowledge of time-series databases (preferably KDB) and Python for analytics Full-stack experience (React) is beneficial for building trader tools and dashboards Additional Information Interview Process: Typically 2 stages - technical interview, system design, and team discussion How to ApplyIf you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us today. 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 Talent Solutions is a trading division of Hays Specialist Recruitment Limited and 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

Site ReliabilityEngineer
Twinstream Limited
Bristol
Hybrid
Mid - Senior
£65,000 - £95,000
+9

Site Reliability Engineer Bristol, Hybrid (3 days onsite, 2 from home) Up to £95K & Great Benefits

Ready to take on high-impact engineering challenges that actually matter? Want to work on mission-critical systems used across the UK’s most high-profile government organisations?

This is your chance to join TwinStream-a team of elite engineers who built their careers cracking complex cross-domain problems, and then built a company to do it even better.

We’re growing fast. Demand for our services is skyrocketing. And now we’re looking for a Site Reliability Engineer who’s ready to step into a role with real ownership, real influence, and real opportunities to innovate.

Why You’ll Love This Role

As our new SRE, you’ll be right at the heart of our evolving cloud and on-prem platforms. This isn’t a “keep the lights on” job-it’s a role where you’ll shape infrastructure strategy, partner closely with software and systems teams, and push performance, reliability, and automation to the next level.

You’ll help us evolve observability, enhance delivery pipelines, eliminate toil, drive reliability metrics, and make smart technical decisions that keep our systems robust as we scale.

If you love solving gnarly problems, improving how things work, and innovating at speed-this is the role for you.

Key Responsibilities of the Site Reliability Engineer:

  • Collaborating with Software Engineers to improve subsystem reliability and performance
  • Partnering with System Administrators to automate toil and cut down alert noise
  • Taking observability to the next level-find issues before they hit the business
  • Supporting development environments to boost speed and quality
  • Researching & evaluating tools to guide key buy-vs-build decisions
  • Deepening your expertise across multiple technical and business domains
  • Expanding your knowledge of diverse tech stacks and platforms

What You Bring

  • Modern configuration management tools (Ansible, Chef or similar)
  • Terraform
  • Docker containers & orchestration (Kubernetes, OpenShift, Docker Swarm)
  • CI/CD tooling (Jenkins or similar)
  • Monitoring/metrics stack (InfluxDB, Prometheus, Grafana)
  • MQ messaging (RabbitMQ or other AMQP solutions)
  • SQL & relational databases
  • Linux administration & shell scripting
  • Network security fundamentals
  • Cloud hosting (ideally AWS: EC2, RDS, S3, Lambda)

Bonus points for:

  • Experience with Java, Go, Python or similar
  • Knowledge of cross-domain principles & tech
  • Service management experience
  • Hands-on observability implementation
  • Proven ability to reduce downtime with smart reliability metrics

Why You’ll Love Working at TwinStream

  • Competitive salary, £65k - £95k DOE
  • 8% employer pension contribution
  • Private medical healthcare (including dental & optical for the whole family)
  • Flexible working culture
  • Learning & development owned by YOU
  • Electric vehicle salary-sacrifice scheme
  • 28 days holiday + bank holidays
  • Regular team events, plus Christmas & summer parties
  • Life assurance & cycle-to-work scheme

Security Clearance

You’ll need to be eligible for SC and/or DV clearance. Any offer will be subject to successful security screening.

Ready to engineer impact?

Apply now and shape the future of secure, high-performance cross-domain systems.

Lead Data Engineer
Searchability NS&D
Gloucester
Hybrid
Senior
£65,000 - £85,000
+2
  • Gloucester location - hybrid working when possible
  • Must hold active Enhanced DV Clearance (West)
  • Competitive Salary DOE - 6% bonus, 25 days holiday, clearance bonus
  • Experience in Data Pipelines, ETL processing, Data Integration, Apache, SQL/NoSQL, Team Leadership

Who Are We?

Our client is a trusted and growing supplier to the National Security sector, delivering mission-critical solutions that help keep the nation safe, secure, and prosperous. You’ll work with cutting-edge technologies, including AI/Data Science, Cyber, Cloud, DevOps/SRE, and Platform Engineering. They have long-term contracts secured across the latest customer framework and are set for significant growth.

What will the Lead Data Engineer be Doing?

You will develop mission-critical data solutions for National Security clients, working with cutting-edge technologies such as AI/DS, Cyber, Cloud, DevOps/SRE, and Platform Engineering. You’ll collaborate directly with customers across National Security, Defence, and Intelligence to solve complex, high-stakes challenges. The role involves designing and implementing sophisticated data pipelines to connect operational systems with analytics and business intelligence platforms.

Responsibilities include:

  • Design, build, and maintain data pipelines, including ingestion, orchestration, and enrichment
  • Develop data-streaming and ETL solutions (e.g. NiFi)
  • Model databases and integrate data from diverse sources
  • Ensure data quality, consistency, and security
  • Monitor and optimise system performance
  • Write clean, secure, reusable, test-driven code
  • Apply systems integration expertise within agile teams
  • Decompose user needs into epics and stories
  • Promote reuse of data flows and best practices across teams
  • Champion data engineering standards across government

The Lead Data Engineer Should Have:

  • Active eDV clearance (West)
  • Willingness to work full-time on-site in Gloucester when required.

Required experience in the following:

  • Apache Kafka
  • Apache NiFI
  • SQL and NoSQL databases (e.g. MongoDB)
  • ETL processing languages such as Groovy, Python or Java
  • Understand and interpret technical and business stakeholder needs
  • Manage expectations through clear, proactive communication
  • Lead and support challenging conversations with teams and senior stakeholders

To be Considered:

Please either apply by clicking online or emailing me directly to . For further information please call me on / - I can make myself available outside of normal working hours to suit from 7am until 10pm. If unavailable, please leave a message and either myself or one of my colleagues will respond. By applying for this role, you give express consent for us to process & submit (subject to required skills) your application to our client in conjunction with this vacancy only. Also feel free to follow me on or connect with me on LinkedIn, just search Henry Clay-Davies (searchability). I look forward to hearing from you.

KEY SKILLS:

DATA ENGINEER / DATA ENGINEERING / DEFENCE / NATIONAL SECURITY / DATA STRATEGY / DATA PIPELINES / DATA GOVERNANCE / SQL / NOSQL / APACHE / NIFI / KAFKA / ETL / GLOUCESTER / DV / SECURITY CLEARED / DV CLEARANCE

ElasticSearch SME
Hays Technology
London
Hybrid
Mid - Senior
£450/day - £500/day
+5

ElasticSearch SME - Active SC, ElasticSearch, Nginx

Up to 500pd (Inside IR35)

London/Hybrid

6 months

My client is a high profile consultancy who are seeking an ElasticSearch SME, with Active Security Clearance (SC) to join a business critical programme for an end client.

Key Requirements:

  • Proven experience as an ElasticSearch SME with Active Security Clearance (SC)
  • Working experience using ElasticSearch as core component, not just ELK logging
  • Hands on support of legacy applications and infrastructure
  • Strong experience with Nginx and Apache Tomcat/HTTP
  • Working knowledge of Containerisation / Virtualisation (e.g. Docker, VMware) and Linux with Shell scripting.
  • Hands-on experience supporting ElasticSearch integrations (indexing, query DSL etc) and experience supporting search-driven services (JSON, Logstash, Kibana etc)
  • Experience with Platforms and Operation Systems including, Oracle Solaris 10, Red Hat Enterprise Linux 8, Windows Server 2008 / 2016 / 2019, VMware ESX v6, Docker, IBM Initiate (Master Data Management)

Nice to have:

  • Working experience with Java 8, 5, 6, 11, Enterprise JavaBeans (EJB) and JSP
  • Immediate availability

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 (url removed)

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