19 of 19 Contract Open Source Jobs in the UK

Cybersec Data Platform Solution Engineer

Hiring Organisation
Experis
Location
Sheffield, South Yorkshire, United Kingdom
Employment Type
Contract
Role Title: Cybersec Sciences & Analytics OpenSource Data Platform Solution Engineer Duration: contract to run until 10/08/2027 Location: Sheffield. Hybrid, 3 days per week onsite Rate: up to £533.60 p/d Umbrella inside IR35 Role purpose/summary Cybersecurity Sciences & Analytics … define and maintain key architecture artefacts (HLDs/LLDs, reference architectures, patterns, and ADRs). They also drive technology evaluation and standardisation across an open-source, petabyte-scale data platform. They own solution designs for custom cybersecurity applications, from requirements through to production support. Partnering with engineering, platform ...

Full Stack Engineer - Contract - Long Term

Hiring Organisation
VIQU IT
Location
London, United Kingdom
Employment Type
Contract
RKE2 or OpenShift. Data at scale. Spark, Trino, Parquet, Iceberg or similar columnar and distributed query tooling. GPU workloads and serving models on-premise. Open source contributions or a portfolio worth a look. Mentoring engineers or leading a small delivery team. DV clearance, or eligibility for it. Interested ...

Senior AI Engineer

Hiring Organisation
MarkIT Placements
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £700 to £900 per day
. Secure-by-design development principles, including ISO 27001, NIST or OWASP. Experience within defence, national security or other highly regulated environments. Contributions to open-source AI/ML projects. Security Clearance Due to the nature of the work, applicants must be eligible to obtain UK security clearance ...

Software Engineer / Developer - Voice Services

Hiring Organisation
Flint Technology Services
Location
Ipswich, Suffolk, East Anglia, United Kingdom
Employment Type
Contract
bridge the gap between traditional telecommunication protocols and modern cloud-based AI. Your core focus will be developing stable SIP services using Java, managing open-source media engines, and integrating advanced Speech AI technologies across multi-cloud environments. Key Responsibilities SIP Development: Develop, test, and maintain ...

Senior AI Engineer

Hiring Organisation
MarkIT Placements
Location
Didcot, Oxfordshire, South East, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £700 to £900 per day
OWASP. Experience working with highly regulated, mission-critical or data-intensive organisations. Experience with large-scale data platforms and distributed search. Contributions to open-source AI/ML projects. The Engineering Challenge This isn't a role focused on experimenting with AI in notebooks or stitching together ...

Software Developer

Hiring Organisation
Rubicon Consulting
Location
United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
bridge the gap between traditional telecommunication protocols and modern cloud-based AI. Your core focus will be developing stable SIP services using Java, managing open-source media engines, and integrating advanced Speech AI technologies across multi-cloud environments. Key Responsibilities SIP Development: Develop, test, and maintain ...

Software Developer

Hiring Organisation
Rubicon Consulting
Location
East of England, United Kingdom
Employment Type
Contract
bridge the gap between traditional telecommunication protocols and modern cloud-based AI. Your core focus will be developing stable SIP services using Java, managing open-source media engines, and integrating advanced Speech AI technologies across multi-cloud environments. Key Responsibilities · SIP Development: Develop, test, and maintain ...

Golang Engineer

Hiring Organisation
Talent-Relay Limited
Location
Burgess Hill, West Sussex, South East, United Kingdom
Employment Type
Contract
Contract Rate
£67,832
Kubernetes . Knowledge of Java or another backend programming language. Experience with gRPC or GraphQL . Experience working with cloud technologies. Contributions to open-source projects. Why Apply? This is a strong opportunity for a Golang Engineer/Go Developer to join a high-profile financial services technology ...

Kong API Gateway Specialist

Hiring Organisation
EUROPEAN SOFTWARE SOLUTIONS (UK) LIMITED
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450 per day
teams. Facilitate governance reviews, architecture discussions, and design workshops. Required Skills & Experience Technical Skills Strong hands-on experience with Kong API Gateway (Enterprise or Open Source). Extensive experience in API management and governance. Strong understanding of RESTful APIs, OpenAPI Specifications (Swagger), and API design best practices. Experience ...

Senior Test Engineer

Hiring Organisation
Stealth IT Consulting Limited
Location
United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£458 per day £458/day inside IR35
Ensure NFT evidence is sufficient to support confident release decisions Tech Stack: Test automation using JavaScript-based frameworks such as WebdriverIO, Playwright or Cypress Open-source JS-based libraries/frameworks for API testing, or Postman JMeter or K6 for load and performance testing CI/CD pipelines ...

Senior Test Engineer

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £473/day
sufficient to support confident release decisions.? Tech stack Expertise in test automation using JavaScript based test frameworks such as WebdriverIO, Playwright or Cypress Open-source JS based libraries or frameworks for API testing, or Postman. Jmeter or K6 for load and performance testing Continuous integration pipelines using Jenkins ...

Build & Deployment Engineer

Hiring Organisation
Deerfoot Recruitment Solutions Limited
Location
City of London, London, Coleman Street, United Kingdom
Employment Type
Contract
London - Hybrid (4 Days on-site, 1 day WFH each week) Inside IR35 Contract Are you a build and deployment engineer who can open up the C# code behind a pipeline and fix it yourself? That combination is exactly what's needed here. You'll join the Platform Engineering … function of one of the world's largest financial groups, owning the on-premises toolchain that takes software from source code to production. GitHub Enterprise, TeamCity, JFrog Artifactory and Xray, and Octopus Deploy, all integrated with ServiceNow change and vulnerability management. In a regulated banking environment, every build ...

Python Developer

Hiring Organisation
Networking People (UK) Limited
Location
Glasgow, Lanarkshire, Scotland, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day + Inside of IR35
Work across multiple infrastructure and automation codebases to remediate identified security vulnerabilities. Design, implement, and validate secure, stable, and maintainable code changes. Integrate vendor, open source, and internally developed solutions into enterprise infrastructure platforms. Develop and maintain automation using Python and related technologies. Build and improve Continuous Integration ...

Senior Infrastructure Integration Engineer

Hiring Organisation
Hays
Location
Glasgow, Lanarkshire, Scotland, United Kingdom
Employment Type
Contract
Contract Rate
Up to £552.0 per day + 552.00
automation codebases to remediate identified security vulnerabilities. * Design, implement, and validate secure, stable, and maintainable code changes. * Work as an integration engineer, connecting vendor, open-source, and internally developed solutions into the firm's infrastructure platform. * Develop and maintain automation using Python and related tooling. * Build and improve ...

Agentic Forward Deployed Engineer

Hiring Organisation
Salt
Location
East London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £600 per day
wider Claude ecosystem . OpenAI and GPT-based technologies . AWS Bedrock . Google Gemini and associated AI technologies . Enterprise use of open-source large language models . Agentic development frameworks and tooling . AI-assisted software engineering environments . Prompt and context engineering . API-driven ...

Software Engineer / Developer - Voice Services

Hiring Organisation
Flint Technology Services
Location
Ipswich, Suffolk, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
bridge the gap between traditional telecommunication protocols and modern cloud-based AI. Your core focus will be developing stable SIP services using Java, managing open-source media engines, and inte click apply for full job details ...

Senior Android Engineer

Hiring Organisation
Spencer Rose Ltd
Location
Bristol, Somerset, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
design principles Good knowledge of Android architecture patterns and best practices Experience with offline storage, threading and performance tuning Strong knowledge of the wider open-source Android ecosystem and commonly used libraries Experience with Git and modern software development practices Strong understanding and practical application of SOLID principles ...

Senior Contract Manager

Hiring Organisation
Experis
Location
Nationwide, United Kingdom
Employment Type
Contract
management Desirable skills Energy & Utilities sector experience. Public sector/government contracting experience. Energy Code guidance knowledge. Cloud services and system integration contracting awareness. Open-source software licensing knowledge. Subcontractor and supply chain contract management. PMO/Project Management experience. High-governance and enhanced scrutiny environments. Contract management ...

Cyber Consultant (SC Cleared)

Hiring Organisation
Morson Edge
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Contract
Contract Rate
£70 - 78 per hour
Managing risks and services in accordance with customer, regulatory and legislative expectations. o Experience outside of traditional enterprise IT scenarios extending to proprietary and open-source software, firmware and electronic hardware. o Exposure to product architectures, encapsulating technologies such as electro-optics, radars, lasers. o Exposure to Operational ...