Position: Integration Engineer
Location: Remote (Occasional Travel to Bristol)
Day Rate: £600 p.d inside IR35
Must hold active SC clearance

We’re supporting a leading defence-sector client and are looking for an experienced Integration Engineer to join on a contract basis. You’ll play a key role in building and securing API and integration services across complex, high-assurance environments.

What you’ll work on:

• Designing, configuring and deploying API gateways (rate limiting, routing, SSL/TLS, OAuth, security controls).
• Integrating REST and SOAP services, including error handling, idempotency and logging.
• Working with IBM webMethods, DataPower Gateway, API Manager and related tooling.
• Contributing to secure-by-design delivery across the full lifecycle.
• Supporting deployments across Azure and AWS environments.

Nice to have:

• Experience with EA Sparx for data modelling.
• Familiarity with Dimensions RM or similar requirements tools.

Not all skills are required - strong integration experience and the ability to work in secure, structured environments are what matter most.

To learn more, please do reach out to Tom Royston via email on

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.

Required Skills & Experience 25 years of experience in OutSystems development (Traditional or Reactive Web / Mobile). Strong understanding of low-code application architecture and lifecycle. Experience with integrations (REST, SOAP, OAuth, SQL, message queues). Basic understanding of CSS, JavaScript, and relational databases (SQL Server, Oracle). Knowledge of application security, performance tuning, and scalable app design.
Job Description:Mandatory Skills: OutSystems
OutSystems Developer (Low-Code Orchestration)Role OverviewThe OutSystems Developer focuses on building scalable, secure, low code applications and workflow orchestrations using the OutSystems platform. The role blends business process understanding with application design, integrations, and front end/back end logic to deliver enterprise-grade solutions.________________________________________Key Responsibilities1. Application & Workflow Development Build responsive web and mobile applications using OutSystems Service Studio. Design workflow orchestrations, process automation, and data models. Develop logic, integrations, and reusable UI patterns and modules. Implement role-based access, security configurations, and performance optimisations.2. Integration & API Management Integrate with backend systems (REST/SOAP APIs, databases, SAP, CRM). Build and maintain integrations ensuring reliability and security. Design asynchronous flows, event-driven architectures, and external data connectors.3. Testing, Deployment & DevOps Conduct unit and integration testing. Troubleshoot performance issues and fix defects across environments. Support deployments using LifeTime, CICD pipelines, and environment promotions. Work with cross functional teams on release planning and hypercare.4. Governance, Documentation & Best Practices Document architecture, modules, APIs, and change logs. Ensure adherence to OutSystems development standards and performance guidelines. Participate in code reviews, architecture discussions, and solution workshopsGood to Have OutSystems certifications (Associate, Professional, Tech Lead). Knowledge of cloud-native deployments and microservices patterns. Experience in Agile / DevOps and CI/CD integration for OutSystems

Backend Python Developer (AI) - Remote - UK - excellent opportunity to join this innovative and fast-growing AI tech. organisation!

Skills/experience

• 2+ years solid commercialPythoncoding experience (backend, API development would be great).
• Good understanding ofDocker, Kubernetes, and scalable distributed systems.
• An Agile mindset and Experience working in agile teams, usingGithubfor CI/CD, branching, pull requests, and automated testing.

Nice to have:

• Comfortable withVS Code, ideally with AI coding tools like Copilot or VS Code agents.
• Understanding/experience of cloud-native patterns, and scalable architecture.
• Experience with Azures native AI stack (AI Foundry,AI Search,Cosmos DB,AKS).
• Interest in experimenting with new AI frameworks and tools.

Role

• Code back end solutions confidently inPython,design and implement scalable architecture using cloud-native tools.
• Build and deploy AI-first features usingAzure AI Foundry, Docker and AKS.
• UseVisual Studio Code(ideally with GitHub Copilot or similar AI coding assistants)
• Collaborate in a tight feedback loop:branch, commit, pull, test, ship all throughGithub.
• Write unit tests and ship quality code, not just quick fixes.
• Participate in sprints and daily stand-ups

Why join

• An excellent opportunity to join an incredible team, organisation - work lean, iterate fast, and learn quickly - perfect role for a Python Back-end Developer with an Agile mindset who is curious, flexible, collaborative, unafraid to try new things and help design and build their AI platform.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Python Developer - FX Options Pricing and Market Data Distribution
The FX Options Pricing and Market Data distribution team is going through significant reengineering and modernisation. We are looking for an experienced Python developer and technologist to take a hands-on role in building out data analytics capabilities and developing frameworks that enable data scientists to leverage market data.
Responsibilities:

• Contribute to the design and development of the electronic FX Options Data Platform
• Building out reliable and fast data pipelines for quantitative analysis and trading.
• Design, build and support our data analytic infrastructure
• Collaborate with a global team of developers, quants and traders to translate business requirements into robust technical solutions
• Drive the design and development of system architecture, work with users of the system, and enhance the quality of deliverables
• Contribute to the continuous improvement of development, deployment and testing processes
• Share your knowledge and mentor other developers, fostering a collaborative and innovative team environment

Required Skills:

• Strong knowledge and experience of Python development.
• Experience implementing front office systems for Quants and Trading.
• Proficiency with Python frameworks such as FastAPI, Flask etc for building scalable applications
• Experience with Python libraries for financial applications (NumPy, Pandas, asyncio)
• Hands-on practical experience delivering system design, application development, testing, and operational stability, particularly in Linux based cloud environments
• Openshift/Kubernetes experience with containerized Python applications
• Caching technologies e.g. Redis, Memcached or others
• Middleware technologies: Kafka, RabbitMQ, Solace, or other message brokers
• Experience with Python package management and dependency management (pip, uv, conda)
• Awareness of industry trends and leveraging new technologies as appropriate
• Proven track record of building new systems, replacing legacy systems and renovating existing systems

Nice to have:

• Java and/or C# development experience
• Experience with quantitative libraries
• Familiarity with CI/CD pipelines for Python applications
• Experience working in finance

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Title : Software Engineer (Front-office) Company : Systematic Quant Fund Location : Cambridge (very flexible) Salary : Up to £70,000 (Plus P&L-linked bonuses) Experience level : 0-4 years' experience Company : An elite ML-driven systematic quant fund (on the precipice of becoming fully proprietary) are providing a very rare opportunity for someone to join their boutique operation and be part of an elite development team at a critical point in the business' journey as they become a prop-shop. The team is highly experienced in the trading sector, formed of senior team members within heavy hitters in the industry, with previous employees going on to work at the likes of Citadel. Fortunately, due to the high-trust culture of the business, you will quickly gain significant work-from-home and work-from-anywhere flexibility. Role : You will be joining the team at a genuinely important moment, playing a very significant role in shaping the future of the business. You will be responsible for the development and maintenance of their low-latency trading platform as well as the management of infrastructure such as data feeds and trade-execution. About you: 0-4 years' experience (you could be a top graduate) Python proficiency (ideally your main language) Exposure to C++, Rust or C# (desirable) Ability to write performance-critical multithreaded code Interest in trading Genuine interest in technology Interest in maximising performance improvements Interest in high-availability systems with strict 99.999% uptime requirements Full details are available. Please don't hesitate to get in touch. TPBN1\_UKTJ

Salary: £200k + bonus

Summary

Not your traditional HFT firm, this company takes a scientific approach to trading financial products. They’re looking for a modern C++ engineer to help drive their expansion into the EU, US and APAC markets. A community of self-starters from multiple tech backgrounds - maths, computer science, statistics, physics, engineering - they have built one of the world’s most sophisticated computing environments for research and development.

This is an extremely high-impact role - contributing to the bottom line from day one. You will work closely with the algo and operations teams, and you will be expected to own the process of entering new markets while managing the continuing & ongoing process of optimizing trading in existing markets.

Requirements

• Modern C++ (17/20) experience is a must-have
• Familiarity with UNIX operating systems and comfort at a command line
• Exceptional communication skills, including the ability to describe software designs at all technical knowledge levels
• Self-starter, with a passion for coding, tinkering, reading, exploring, breaking things, etc., in your spare time
• Bachelor’s degree in Computer Science, Engineering (or related field)
• Experience developing market data and order entry systems a plus

NB: Please do not apply if you’re a fresh graduate.

Benefits

• Market-leading salary + bonuses + benefits
• They’re willing to be flexible with WFH
• Collaborative and friendly environment with smart, highly engaged colleagues
• Culture where everyone’s ideas are encouraged and celebrated
• Gain broad exposure to both technical and business aspects of trading

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you or you would like to more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

Summary

Fantastic opportunity for a strong C++ software engineer to join a globally successful firm. This role offers the opportunity to contribute to work with the latest technologies on engaging complex problems.

You’ll partner with colleagues across the business to understand their needs and priorities, and create software solutions that optimizes performance and efficiency. The work will be a mix of designing, testing & deploying elegant software, analyzing technical problems, and continuously improving performance, functionality and stability.

This firm hires the brightest minds from a range of backgrounds - technology, research, and finance - and provides all the tools needed to collaborate. The successful candidate will be an outstanding communicator, who does their best work in a fast-paced, dynamic and collaborative environment.

Requirements

• 3+ years’ professional experience
• Solid C++ experience, writing clean reliable code
• Keen proponent of solving open-ended problems with analytical methods
• Ability to work independently and prioritize high-impact projects
• Bachelor’s degree in Computer Science (or related field) from a top-tier university

Rewards and Incentives

• Hugely collaborative environment between teams, not siloed like other firms
• Competitive compensation: truly flat structure; feel valued for your input and be rewarded for great ideas

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If you think you’re a strong candidate for the role and would like further info, please contact:

Josh Williamson
josh.williamson@oxfordknight.co.uk
+44 (0)20 3475 5021
linkedin.com/in/josh-williamson-3745b7151

Job Title: Full Stack Software Engineer (Robotic Systems) Salary Expectation: £80,000 - £90,000 (Depending on Experience) Location: UK (Remote) Note: Only candidates with permanent, unrestricted UK working rights will be considered, as visa sponsorship is not offered for this position. Overview: Zenovo is partnering with an innovative company developing advanced autonomous robotic systems to find a Full-Stack Software Engineer. This is a fully remote opportunity within the UK. You will play a key role in building the software that powers intelligent machines and their user experiences, working across web, mobile, HMIs, and internal tools that support system control and operations. This position suits an engineer who enjoys working across the full stack in a fast-paced environment and has a strong interest in autonomy, robotics, and AI. Job Responsibilities: Design and build responsive web and mobile experiences for end users. Develop intuitive interfaces for operators and remote supervision, integrating teleoperation, navigation data, and safety features. Create and maintain dashboards and front-end systems that support operational workflows and data-driven decision-making. Develop and manage scalable backend services, including APIs, databases, and real-time data pipelines. Collaborate with AI and autonomy teams to embed advanced models into user-facing products and tools. Work closely with cross-functional teams and take ownership of features from concept through to deployment. Required Skills & Experience: 5+ Years Full-Stack experience  across modern front-end frameworks (React, Vue, Svelte, etc.) and backend technologies (Node.js, Python/FastAPI, Go, microservices, SQL/NoSQL). A strong portfolio of shipped products demonstrating high-quality UI/UX, performance, and maintainable code (GitHub or demos encouraged). Experience with AI-assisted development tools such as Claude Code, OpenAI Codex, CodeRabbit, Aikido, v0, or similar, along with familiarity using AI-enhanced IDEs (e.g. VS Code with Copilot, Cursor, Antigravity) and an openness to adopting new productivity tools. Experience designing and consuming REST/GraphQL APIs, working with real-time data systems (WebSockets, Kafka, MQTT), and deploying applications to cloud infrastructure. Ability to write clean, testable, and maintainable code within a collaborative environment, with a solid understanding of CI/CD and DevOps practices. Strong problem-solving skills, self-direction, and enthusiasm for learning about robotics, autonomous systems, and heavy equipment domains. To find out more, please apply with your latest CV

Salary: up to £200k base + bonus

Summary

Fantastic opportunity for all-star coders at one of the world’s top algorithmic trading firms. The Systems Development team builds and maintains the infrastructure and software platform used by all Systems teams to manage servers and networks.

As a Python Developer, your workload will be varied, offering great opportunities to improve and have a huge impact. Your main focus will be tool development (in Python), both improving and integrating existing tools and libraries across the platform, as well as designing and building new ones.

The successful Python Developer loves to be challenged and thrives in fast-paced environments. You’re a big fan of open-source software, adept at effective multitasking and a proponent of automation - why do the same task twice manually?

Requirements

• 3+ years of experience, including strong Python programming skills
• Highly proficient in debugging and analysing problems quickly
• Minimum bachelor’s degree in Computer Science (or related field)
• Excellent understanding of CompSci fundamentals
• Bonus points for knowledge of: Debian operating system, systems configuration management and/or CI/CD tools and processes

NB: Please do not apply if you are a fresh graduate.

Benefits

• Market-leading salary + bonuses + generous benefits package
• They’re willing to be flexible with WFH
• Truly flat management structure, with no red tape
• Friendly culture where everyone’s ideas are encouraged and celebrated
• Feel valued and be rewarded for your hard work where coding is front and centre

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you or you’d like to know more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

The role sits within a collaborative, agile software development environment, where engineers apply strong technical capability and problem-solving skills to deliver innovative software solutions. Rather than focusing on consumer finance or transactional systems, the work centres on developing secure, mission-critical products that protect people, platforms, and information in the face of evolving threats.

Responsibilities:

• Produce detailed logical and technical designs for software components
• Implement, document, and test software using a test-driven development approach
• Write clean, secure, maintainable code that is open by default and easy to reuse
• Translate logical designs into robust, working software
• Integrate API and UI components with existing data stores and external APIs
• Maintain and enhance existing architectural components, including data ingest, data stores, and REST APIs
• Work with both established and emerging technologies, selecting appropriate patterns and tools
• Participate in agile ceremonies including daily stand-ups, sprint planning, epic decomposition, and demos
• Collaborate closely with engineers, stakeholders, and customers to solve complex problems

Required skills and experience:

• Commercial experience with at least one of the following:
  • Java Enterprise/Spring Boot
  • Python
  • Frontend development using ReactJS or VueJS
• Experience using language-appropriate testing frameworks
• Experience with CI pipelines, ideally GitLab CI
• Containerisation and orchestration using Docker and Kubernetes
• Experience working with cloud platforms, particularly AWS
• Exposure to the full software development life cycle
• Familiarity with agile delivery methods such as Scrum or Kanban
• Strong technical curiosity and willingness to learn new technologies

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.

Specific responsibilities of the role include: Designing and building web applications Writing code to create web pages and web applications, primarily in the ASP.NET environment and leveraging data from SQL databases Using front-end technologies such as HTML, CSS, and JavaScript and backend languages such as C# Analyzing user requirements and turning design mockups into functional web pages. Taking a wholistic approach to full-stack development, prioritising security, performance and reliability in a DevSecOps approach. Front-End Development (User Interface) Creating the visual layout and user interaction, and ensuring applications are responsive (work well on phones, tablets, and desktops). Optimizing images, code, and performance for faster loading. Delivering smooth user experience using frameworks like Angular. Back-End Development (Server Side) Developing APIs, reusable libraries and application logic. Handling security and authentication robustly. Optimizing storage procedures and database storage to ensure optimal performance, in particular with large datasets. Testing and Debugging Monitoring exception logs and user reports to identify and fix errors in software. Testing websites across different browsers and devices. Improving loading speed and responsiveness during high load scenarios. Improving SEO (search engine optimization). Collaboration with Other Team Members Working with senior software developers and product owners. Using integrated development tools and version control systems such as Azure DevOps, Microsoft Visual Studio and SQL Server Management Studio.

Remote (Europe) | AI-First Geospatial Platform

A product-led tech company is hiring a Graph Database Specialist to build a Neo4j + PostGIS platform at the core of its product.

This is a high-impact role where the graph + geospatial layer is the competitive advantage, not just infrastructure. Youll design, scale, and optimise a production-grade data platform handling complex, real-world relationships.

Key Responsibilities

• Design and optimise Neo4j graph models and Cypher queries
• Build scalable, idempotent ETL / ingestion pipelines
• Architect PostGIS spatial schemas and queries
• Lead migration from legacy systems into graph architecture
• Expose data via high-performance APIs (REST / GraphQL)
• Apply AI tools to accelerate development while maintaining data quality

Requirements

• Strong Neo4j + Cypher experience (production optimisation)
• Solid PostGIS / spatial SQL expertise
• Experience with graph modelling and large-scale ETL pipelines
• Strong API design for data-heavy systems

Nice to have: UK property data (UPRN), Kafka/event streaming, spatial data experience

Details

• Remote: Europe time zones preferred
• Type: Full-time (strong contractors considered)
• Start: Urgent

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Team Overview
XiP is building a next-generation cross-asset calculation system for Citi trading desks and enterprise users in the largest global financial markets and exchanges in New York, London, and other major financial hubs.

Our team owns multiple Java Spring Boot Services that execute, partition, and track quantitative risk graphs/trades in a distributed environment. These graphs can fail due to their complexity and our system must adapt quickly to these failures to provide a seamless experience for clients.
XiP Compute Services are deployed onto OpenShift and Amazon’s Elastic Kubernetes Service (EKS). An important initiative in 2025 will be onboarding Google’s Kubernetes Engine to further expand our coverage. Our system scales on-demand, and we can run up to tens of thousands of replicas of our services across all asset classes.

Role Overview
We are seeking a Senior Engineer to fill the role of ‘Applications Development Technology Lead Analyst’ on the XiNG large scale distributed calculation platform ( XiP ).

In this role you will design, build, and maintain the calculation engine at the heart of the XiP platform. This engine is responsible for c. 0.5 billion risk & suitability calculations at Citi every day. A single customer run compresses 17 million minutes of compute into a single 90-minute execution.

Run on hundreds of thousands of pods across the entire XiP platform every day this calculation engine is both highly performant and rapidly changing to support new scenarios, technologies, and infrastructure.

As an engineer working on the calculation engine. You will work closely with software engineers, DevOps, and our customers to ensure reliable, secure, and scalable operations of our platform.

Responsibilities:

Take part of the shared responsibility for the long-term strategic direction of the XiP Calculation Engine:

Apply your experience and skills to develop the future versions of the calculation engine. This means making it faster, utilizing resources better, and scale to even greater sizes. This means adding new features without impacting performance of the platform in undesirable manner, small changes multiplied by millions of calculations have a high cost . This means solving hard problems like transferring small amounts of data to a huge number of machines.

Serve as advisor or coach to team members, allocating and overseeing work:

Mentor and guide mid-level developers, providing technical advice, code reviews, and career development support. Allocate tasks based on skill sets and project priorities, ensuring balanced workloads and timely delivery. Foster a collaborative and growth-oriented team environment, encouraging best practices and continuous learning.

Implement changes and improvements to Citi’s Risk Calculation Engine, including analyzing and designing improvements to the distribution mechanisms of the engine which regularly parallelizes 250,000 hours of compute into a single 90-minute execution:

Lead the design, development, and implementation of enhancements to the Risk Calculation Engine, focusing on optimizing its distribution mechanisms. Analyze current parallelization strategies and identify opportunities to further improve efficiency, scalability, and throughput.

Operationally support the optimization of Risk calculations by examining and providing SME level insight into the distributed execution of extremely large calculations:

Monitor and analyze the distributed execution of large-scale risk calculations, identifying performance bottlenecks and inefficiencies. Provide subject matter expertise to guide operational improvements, leveraging deep technical knowledge to recommend and implement optimizations that enhance calculation speed and resource utilization .

Plan, coordinate, and execute strategic changes to the engine to reach the next scaling milestone:

Develop and manage strategic initiatives aimed at scaling the Risk Calculation Engine to meet future business demands. Coordinate with stakeholders to ensure that all scaling efforts are aligned with customer needs.

Provide specialized customer support to optimize and improve large, distributed calculations.

Act as a primary point of contact for clients to address issues and optimize inefficiencies that arise during distributed workload execution.

Qualifications:

• Multiple years professional software development experience with Java.

• Solid experience with Java frameworks (e.g., Spring, Spring Boot , Quarkus ).

• Experience designing, building, and maintaining large-scale, distributed systems.

• Experience with RESTful API design and implementation.

• Strong understanding of object-oriented programming and design patterns.

• Exposure to NoSQL databases (e.g., MongoDB, Cassandra) is a plus.

• Exposure to cloud platforms (e.g., AWS, Azure, GCP) and containerization (e.g., Docker, Kubernetes) is desirable.

• Experience with unit testing, integration testing, and test automation frameworks (e.g., JUnit, Mockito).

• Experience working in Agile/Scrum development environments.

• Practical experience with Python for scripting, automation, or data processing tasks.

• Experience with CI/CD pipelines and DevOps practices is a plus.

Education:

Bachelor’s or Master’s degree in Computer Science , Engineering, or a related field.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Package Description: Lead Software Developer

Remote (UK-based) | Occasional travel to Ashford, Kent (approximately twice a year)

Full-time | Permanent | 37.5 hours per week

About CLEO Systems

CLEO Systems is a wholly owned subsidiary of Integrated Care 24 (IC24) , the UKs leading not-for-profit social enterprise delivering innovative, patient-focused primary care services.

Our mission is Clinical Excellence Online (CLEO) using technology to improve access to health and social care, reduce pressure on secondary care, and put patients first, not paperwork.IC24 supports over 6 million patients nationwide across NHS 111, GP out-of-hours, primary care, and secondary care services.

With over 20 years of software expertise , we work in close collaboration with the NHS to deliver solutions across secondary care outpatients, integrated urgent care, community services, urgent treatment centres, and pharmacy settings.

Our Ethos

Integrity We do the right thing

Creativity We find the best solutions

Collaboration We work together to deliver

The Role

As a Lead Software Developer , youll lead the design, development, and optimisation of CLEO Systems mission-critical software solutions.Youll mentor and manage a team of developers while playing a key role in architectural decision-making and delivery of high-performance, scalable applications that directly support patient care.

Key Responsibilities

Collaborate with the Technical Design Authority to propose and implement architectural improvements

Design and develop complex backend systems using modern cloud technologies

Optimise application performance while maintaining data integrity and high-quality standards

Ensure seamless integration with databases, APIs, and third-party systems

Lead, mentor, and develop a high-performing software development team

Drive innovation and ensure delivery aligns with CLEO Systems strategic goals

Essential Criteria

A minimum of 6 years experience as a Software Developer

Strong experience with Golang , including TDD and unit testing

Hands-on experience with AWS (EC2, S3, RDS, Lambda)

Proficiency with ALM tools such as JIRA and GitHub

Strong SQL skills including schema design and scripting (MSSQL & PostgreSQL)

Experience integrating third-party solutions via APIs, messaging, or web services

Solid understanding of web technologies, including HTML5 and JavaScript

Whats In It for You?

Salary up to £75,000 (dependent on experience)

Additional £3,000 on-call allowance

Generous annual leave including bank holidays

6% employer pension contribution (NEST)

Private medical insurance via Benenden Health (option to add family cover available)

Laptop and full home-working kit provided

Heartbeat wellbeing programme with discounts and resources

Free, confidential 24/7 counselling service

Ongoing learning and development opportunities

Interview Process

We believe interviews should be a two-way conversation. Our process typically includes:

Introductory call (45 minutes) with our Principal Software Architect

Technical stage a Go coding challenge

Final interview discussion of the challenge and further questions

Due to the nature of this position, employment is subject to proof of eligibility to work in the UK, completion of a satisfactory basic DBS disclosure and two references.

For a job description and person specification please see attached

Closing date: Friday 17th April 2026

This advert may close sooner if sufficient applications are received

At CLEO Systems , we celebrate brave ideas and brave people.

Learn more at www.cleosystems.com

We are committed to providing equal opportunities for all people and we particularly encourage applications from ethnic minorities, applicants with a disability and those from other under-represented groups.

If you would like to discuss any reasonable adjustments before applying or would like an accessible version of any recruitment documents, please contact the recruitment team on

TPBN1_UKTJ

Salary: up to £200k base + bonus

Summary

Lively, positive spirit of a start-up, with the stability of a longer-established player, this leading quant fund is looking for a highly proactive C++/Python engineer to join their rapidly expanding crypto division as they help shape the future of the industry.

In this role, your work will include building and optimizing trading strategies; researching new protocols; researching new data sources; designing and improving our research and trading systems; and collaborating with others inside and outside of the team to advance the team’s dual mission of being the top crypto trader in the world and a major contributor in the crypto ecosystem.

The ideal candidate will be a hybrid quant/dev with high personal coding standards. You’ll leverage existing utilities and open-source software effectively, and make decisions to optimize the team’s productivity, not afraid to take the longer road if it makes the code more extensible/testable.

Requirements

• At least 2+ years of programming experience in C++/Python
• Excellent understanding of Unix and git
• Proponent of cleanly architected systems
• Ability to work creatively and independently on long-term projects
• Bonus points for distributed systems experience
• Interest in open-source software and/or cryptocurrencies is advantageous

NB: Please don’t apply if you’re a fresh graduate.

Benefits

• Competitive base salary & bonus
• Enormous opportunity to grow, learn and have a significant business impact
• Contributions are rewarded; career progression supported
• Substantial benefits package, including private medical, paid parental leave, group life assurance & parking/cycle schemes

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you or you would like to know more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

Software Developer - 12 Months Contract - 625/day I am looking to speak to Python Developers, in relation to a 12 months contract on a high profile transformation programme. This is a long-term assignment on one of the most challenging programmes across the Public Sector, and it's not an understatement to say your work will impact the lives of millions across the UK. Details need to remain vague, due to the nature of the assignment, however the central requirements are: Eligible to get a SC Clearance (ideally active for a quicker start) Python AWS CDK Experience of using AI / Prompt engineering to aid development Call me, Alex Manea, at NonStop Recruitment now for a confidential conversation. Contact me on (email address removed) or (phone number removed), please send your CV in word format OR if this does not sound like the opportunity for you, but you are a professional working across the Public Sector, please feel free to get in touch, to see other opportunities we may have within this field. Disability confident As a member of the disability confident scheme, our client guarantees to interview all candidates who have a disability and who meet all the essential criteria for the vacancy. In cases where we have a high volume of candidates who have a disability who meet all the essential criteria, we will interview the best candidates from within that group. If you qualify for the above, please notify us on (email address removed)

Software Engineer - Active SC, Java, MicroservicesUp to £550 per day (Inside IR35)London / Remote6 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 (url removed)

We are looking for a highly capable Full Stack Developer with a strong commitment to Test-Driven Development (TDD) to join our team. This role is critical in delivering secure, high-quality software in an environment where precision, accountability, and technical rigour are essential. You will work across the full stack, contributing to both front-end and back-end development, while playing an active role in shaping technical decisions and maintaining engineering standards. Key Responsibilities Design, build, and maintain scalable applications using modern full-stack technologies, with a strong focus on C# / .NET Develop and test distributed systems within a microservices architecture Work with cloud-based infrastructure, ensuring reliability, performance, and security Apply Test-Driven Development (TDD) as a core part of the development lifecycle Collaborate with cross-functional teams to deliver high-quality, customer-facing features Contribute to front-end development, ensuring strong user experience and usability Leverage AI-assisted development tools (e.g., Claude Code, Cursor) to enhance productivity Review technical specifications and challenge assumptions where necessary Ensure code quality and robustness, particularly in a security-critical environment Required Skills & Experience Strong commercial experience with C# and .NET in a full-stack or backend-heavy role Proven experience developing within microservices architectures and cloud environments (beyond theoretical knowledge) Solid front-end capability using frameworks such as Vue, React, or similar Demonstrated commitment to Test-Driven Development (TDD) as a daily practice Experience building and maintaining customer-facing applications, with a focus on user experience Practical use of AI-assisted development tools in real-world projects Ability to perform under pressure and maintain accuracy in technical problem-solving Strong understanding of secure coding practices Key Attributes Confident communicator who can clearly articulate ideas and technical decisions Willingness to challenge requirements and push back when something is not right Proactive mindset with strong ownership of work Attention to detail, particularly in high-stakes or security-sensitive environments Collaborative, but not afraid to question and improve processes Desirable Experience working in security-critical or highly regulated environments Exposure to modern DevOps practices and CI/CD pipelines This role is suited to a developer who combines strong technical depth with independent thinking. We are looking for someone who not only delivers high-quality code but also contributes to better outcomes by questioning, improving, and taking ownership. C# Software Engineer (TDD Focus)

Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid‑level engineer with strong Spark development experience rather than design, infrastructure, or management responsibilities. What you'll need to succeed Strong hands‑on experience with Apache Spark - Writing and tuning Spark jobs /PySpark development experience. Strong experience working in with containerised environments using Kubernetes. Experience with programming in Python or Scala Exposure to Big Data technologies and distributed data processing Have some working knowledge of Java or Java Spring boot development background Experienced in an Ops way of working, not pure development only - you know how to deploy solutions. Experience with OpenShift would be highly desirable! Experience working in an Agile way of working (Scrum, sprints, demos) Financial services or professional services experience required. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role is focused on building nonperformance Apache Spark jobs, with a strong emphasis on performance optimisation. It is primarily Java‑based, with Python strongly encouraged; experience across Java, Python, and Scala is ideal, with Java and Python being the preferred combination. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid‑level engineer with strong Spark development experience rather than design, infrastructure, or management responsibilities. What you'll need to succeed Strong hands‑on experience with Apache Spark - Writing and tuning Spark jobs /PySpark development experience Strong Java or Java Spring boot development background Experience with programming in Python or Scala Exposure to Big Data technologies and distributed data processing Working with containerised environments using Kubernetes/ Airflow. Agile ways of working (Scrum, sprints, demos) Comfortable working in a distributed team Financial services or professional services experience required. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

About Man Group

Man Group is a global alternative investment management firm focused on pursuing outperformance for sophisticated clients via our Systematic, Discretionary and Solutions offerings. Powered by talent and advanced technology, our single and multi-manager investment strategies are underpinned by deep research and span public and private markets, across all major asset classes, with a significant focus on alternatives. Man Group takes a partnership approach to working with clients, establishing deep connections and creating tailored solutions to meet their investment goals and those of the millions of retirees and savers they represent.

Headquartered in London, we manage $227.6 billion* and operate across multiple offices globally. Man Group plc is listed on the London Stock Exchange under the ticker EMG.LN and is a constituent of the FTSE 250 Index. Further information can be found at

* As at 31 December 2025

The Team

This is an outstanding opportunity to join one of the largest alternative asset managers. Technology is central to Man’s business strategy, and we are constantly evolving to stay ahead. Our culture embraces change and innovation, with engineering at the heart of our operating platform.

We are seeking Software Engineers with deep expertise in C# and .NET to lead the design and development of mission-critical systems across our domain. You will play a key role in shaping technical strategy and driving architectural decisions within a high-performing team. You should have the enthusiasm for leveraging AI development tools to accelerate delivery and driving their adoption across the team.

A great chance to collaborate, and learn alongside, highly skilled engineers whilst building up core financial and order management knowledge. New joiners will get the chance to work on the latest and best technologies for the challenges ahead.

Role Responsibilities

• Lead the end-to-end delivery of complex software solutions—from requirements gathering and architecture design to development, testing, and production deployments
• Own and drive long-term technical initiatives and architectural improvements across systems
• Collaborate closely with stakeholders to align technical solutions with business goals
• Champion engineering best practices, including CI/CD, automated testing, and scalable design patterns
• Conduct code reviews and provide technical guidance to peers and junior engineers
• Proactively identify and reduce technical debt, improve system resilience, and optimize performance
• Lead incident response and root cause analysis for production issues
• Contribute to the evolution of our engineering culture and platform strategy

Key Competencies

Essential

• 5–7+ years of professional experience in software engineering with C# and .NET
• Proven experience in architectural design, system scalability, and distributed systems
• Strong knowledge of Microsoft SQL Server, including schema design, query optimization, and performance tuning
• Embracing agentic engineering — willingness and ability to work effectively with AI -assisted development tools as part of daily workflow
• Ability to balance delivery of business value with long-term technical strategy
• Excellent communication and leadership skills, with the ability to influence and drive consensus
• Strong advocate for collaborative development practices and continuous improvement

Advantageous

• Experience with cloud platforms (e.g., Azure or AWS) and containerization (e.g., Docker, Kubernetes)

Inclusion, Work-Life Balance and Benefits at Man Group
You’ll thrive in our working environment that champions equality of opportunity. Your unique perspective will contribute to our success, joining a workplace where inclusion is fundamental and deeply embedded in our culture and values. Through our external and internal initiatives, partnerships and programmes, you’ll find opportunities to grow, develop your talents, and help foster an inclusive environment for all across our firm and industry. Learn more at .

You’ll have opportunities to make a difference through our charitable and global initiatives, while advancing your career through professional development, and with flexible working arrangements available too. Like all our people, you’ll receive two annual ‘Mankind’ days of paid leave for community volunteering.

Our comprehensive benefits package includes competitive holiday entitlements, pension/401k, life and long-term disability coverage, group sick pay, enhanced parental leave and long-service leave. Depending on your location, you may also enjoy additional benefits such as private medical coverage, discounted gym membership options and pet insurance.

Equal Employment Opportunity Policy

Man Group provides equal employment opportunities to all applicants and all employees without regard to race, color, creed, national origin, ancestry, religion, disability, sex, gender identity and expression, marital status, sexual orientation, military or veteran status, age or any other legally protected category or status in accordance with applicable federal, state and local laws.

Man Group is a Disability Confident Committed employer; if you require help or information on reasonable adjustments as you apply for roles with us, please contact .