76 to 100 of 205 Open Source Jobs in the UK

Artificial Intelligence Engineer

Hiring Organisation
Thales
Location
Crawley, West Sussex, UK
Employment Type
Full-time
with large‐scale data initiatives, data labelling strategies, and data quality management. Familiarity with MLOps practices and cloud platforms for AI deployment. Contributions to opensource AI projects, publications, or patents. Pay range and compensation package: Competitive salary based on experience and qualifications. Equal Opportunity Statement: Thales ...

Senior Staff Engineer (Machine Learning) - 45391

Hiring Organisation
Turing
Location
United Kingdom
Science, Engineering, or related field (PhD preferred). Nice to Have: Experience building Agentic applications Experience training or fine-tuning foundation models. Contributions to open-source ML or LLM frameworks. Understanding of Responsible AI, bias mitigation, and model interpretability. Perks of Freelancing With Turing: Work in a fully ...

Lead Software Engineer (Scala & Spark)

Hiring Organisation
Aker Systems Limited
Location
Central London, London, United Kingdom
Employment Type
Permanent
years. As a Software Engineer, you will help lead the development of backend services for a government client leveraging the latest commercial and open-source technologies. This involves designing, developing, documenting and deploying backend services with a focus on high availability, low latency and scalability. Design, develop, document … clean code, documentation, defensive programming, automated testing and code reviews Working in Agile development and/or DevOps teams Using GitHub/GitLab for source control Test Driven Development with appropriate tools and frameworks Experience in Big Data technologies Experience in Public Cloud services, such as AWS Aker Systems ...

Senior Go Developer

Hiring Organisation
Fruition Group
Location
Slough, Berkshire, UK
Employment Type
Full-time
take ownership across the full development lifecycle, from system design and implementation to optimisation and release. You'll be working in an open, fast-moving environment where ideas get tested quickly and good engineering practices are taken seriously. If you like seeing your work go live within days … technology-driven organisations or start-ups Experience with Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a Senior Go Developer looking for a fast-paced, collaborative contract role where your work will ship quickly ...

Senior Go Developer

Hiring Organisation
Fruition Group
Location
London, United Kingdom
Employment Type
Contract
take ownership across the full development lifecycle, from system design and implementation to optimisation and release. You'll be working in an open, fast-moving environment where ideas get tested quickly and good engineering practices are taken seriously. If you like seeing your work go live within days … technology-driven organisations or start-ups Experience with Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a Senior Go Developer looking for a fast-paced, collaborative contract role where your work will ship quickly ...

AWS Cloud Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 per annum
ability to work independently and collaboratively Highly desirable AWS certifications (e.g., DevOps Engineer, Solutions Architect) Experience with AWS generative AI services (Bedrock, SageMaker) Open-source contributions demonstrating engineering best practices Benefits Work on cutting-edge generative AI projects Join a talented, innovative team Competitive salary and benefits package ...

Generative AI Engineer

Hiring Organisation
RJC Group
Location
London, UK
Employment Type
Full-time
Working On Designing and refining autonomous AI agents using modern orchestration frameworks (e.g., LangGraph, Semantic Kernel) and a mix of cloud-hosted and open-source language models. Developing complete agent workflows, from event triggers to model endpoints to user-facing integrations. Expect to work with systems like ...

Full-Stack Java Engineer (Mid-to-Senior) - Remote First | Full-Time or 4-Day Equivalent

Hiring Organisation
PhixFlow
Location
Ashton-Under-Lyne, Greater Manchester, United Kingdom
your time. 1. Application: Submit your CV and a cover letter to careers@phixflow.com explaining your relevant experience, both from paid work or other open-source projects you are involved with. 2. Online Assessment: Successful applicants will be invited to complete a short intellectual challenge (logic test) designed ...

Machine Learning Engineer

Hiring Organisation
Higher - AI recruitment
Location
City of London, London, United Kingdom
software engineering skills with a focus velocity Excellent communication skills and the ability to flourish in a team Located in London/Paris and open to working in office Tech Stack: Python FastAPI Python, Typescript, or React Open source LLMs Building for production Benefits Currently Offered (likely ...

Artificial Intelligence Engineer

Hiring Organisation
Unilink
Location
United Kingdom
communications. Knowledge of ethics, bias mitigation, and fairness in AI. Familiarity with justice technology, corrections, or secure IT systems. Contributions to AI research or open-source projects. ...

Backend Software Engineer

Hiring Organisation
Fruition Group
Location
United Kingdom
Employment Type
Contract
fast-moving, tech-focused organisations (e.g. start-ups or scale-ups) Additional skills with Kafka, Cassandra, gRPC, and microservices design are highly advantageous Open-source contributions are a plus This is an excellent opportunity for a Backend Software Engineer who thrives on tackling technical challenges and wants ...

Backend Software Engineer

Hiring Organisation
Fruition Group
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
fast-moving, tech-focused organisations (e.g. start-ups or scale-ups) Additional skills with Kafka, Cassandra, gRPC, and microservices design are highly advantageous Open-source contributions are a plus This is an excellent opportunity for a Backend Software Engineer who thrives on tackling technical challenges and wants ...

C# .Net Developer

Hiring Organisation
Damia Group Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £650/day
team Solid C# .Net experience Fine-tune Large Language Models (LLMs) and other generative architectures. Optimise pre-trained models (OpenAI, Anthropic, or open-source LLMs) for business use cases using prompt engineering and reinforcement learning. Experiment with model configurations to balance performance, cost, and scalability. Build robust data ...

Full Stack Engineer

Hiring Organisation
Polytec Personnel Ltd
Location
CB4, Milton, Cambridgeshire, United Kingdom
Employment Type
Permanent
Salary
£1 - £55000/annum
mobile applications using Ionic - Strong experience in API development, authentication and database design (DynamoDB and PostgreSQL) - Demonstrable technical excellence via public demos, project pages, open-source contributions, etc. - Strong problem-solving skills and a detail-oriented approach - Excellent communication and stakeholder management abilities - Ability to work cross-functionally ...

Backend Engineer

Hiring Organisation
Fruition Group
Location
England, UK
Employment Type
Full-time
organisations or start-ups Hands-on skills in Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate Backend Engineer who enjoys working autonomously, taking ownership, and building for impact in a high-trust ...

Software Engineer

Hiring Organisation
Venture 2
Location
United Kingdom
style. Nice to Have · ⁠ Experience with model serving, quantisation, or distributed inference. · Exposure to containerisation and cloud environments (AWS/DO). · ⁠Projects or open-source contributions demonstrating capability and initiative. · Experience in data engineering, cybersecurity, prediction systems or financial systems. · Ability to own the delivery pipeline from ...

Backend Engineer

Hiring Organisation
Fruition Group
Location
United Kingdom
Employment Type
Contract
organisations or start-ups Hands-on skills in Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate Backend Engineer who enjoys working autonomously, taking ownership, and building for impact in a high-trust ...

Research Engineer

Hiring Organisation
Vertex Search
Location
London Area, United Kingdom
Experience building pipelines for scientific or healthcare data Knowledge of cluster compute, distributed training and GPUs Understanding of healthcare data or regulated environments Open-source contributions Cloud experience (AWS/GCP/Azure) Compensation & Benefits Excellent base salary Generous equity allocation from day one Comprehensive health & wellness package ...

Solution Architect /AWS

Hiring Organisation
CACI Ltd
Location
England, United Kingdom
support to customers, assisting them with technology choices and solutions to complex problems Using a wide range of technologies, specialising in the use of open-source libraries and components Deploying software systems to a mixture of environments including public (AWS and Azure) and private cloud Managing relationships with ...

Principal Test Automation Consultant

Hiring Organisation
TEN10 SOLUTIONS LIMITED
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
leading by example. What Youll Be Doing Design and Develop: Build and support automation or performance test frameworks using the most appropriate solutions. Whether open source or commercial, or a combination . Collaborate with Clients: Work closely with clients to understand their requirements and create tailored QA strategies. ...

Infrastructure Engineer

Hiring Organisation
Lockheed Martin
Location
Brockworth, England, United Kingdom
formal product sell off Experience in automated testing in the software domain Experience in developing GitLab CI/CD Pipelines. Experience with Commercial and Open Source automated testing frameworks Experience working with Git, Atlassian suite, Jira, Confluence or similar Knowledge and automation of both functional and non-functional ...

Lead Software Engineer (Founding Team)

Hiring Organisation
BroadbandUK
Location
East London, London, United Kingdom
Employment Type
Permanent
startup environments, enjoy solving real problems, and learn quickly. Proven impact: Youve built and scaled products, led projects that made a difference, contributed to open-source, or delivered results that truly moved the needle. Why youll love it here Impact from day one: Your work goes live quickly ...

Lead Security Engineer

Hiring Organisation
The Fortune Group
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 - £110,000 per annum
first class secure environment. Suitable Lead Security Engineers will work remotely or in the London office. Projects that need to be completed Security Awareness OpenSource Software scanning Automated Vulnerability Scanning Kubernetes Vulnerability Scanning Supply Chain monitoring (container images etc.) SIEM and Monitoring/Alerting service AntiVirus/AntiMalware ...

Full Stack Engineer IAM

Hiring Organisation
Paydock
Location
Manchester, England, United Kingdom
Application Security and secure coding practices. We have a dedicated AppSec team to answer your questions and lead you towards success. Contributions to open-source projects or writing technical content related to security, APIs, or full-stack architecture. Previous work experience with Relationship Based Access Control (ReBac) authorization … models (e.g., Google Zanzibar, Open FGA, etc.) Why Join Paydock? Work with a passionate, remote-first team that's reshaping payments. Opportunity to lead and define AI use cases at a scaling fintech company. Flat structure, collaborative culture, and the chance to have a real impact. Competitive compensation ...

Lead AI Solutions Architect

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £750/day Inside IR35
/ML lifecycle, model governance, and ethical AI. Hands-on experience with platforms such as AWS Bedrock, Azure AI Foundry, Google Vertex, and open-source AI/ML stacks. Familiarity with Agentic AI Frameworks and risk-based AI assurance. Strong grasp of DPIAs, data protection, and transparency requirements. … technical standards. Hands-on delivery of AI solutions - not just oversight. Preference for candidates with a "doer" mindset - technically capable and execution-focused. People Source Consulting Ltd is acting as an Employment Business in relation to this vacancy. People Source specialise in technology recruitment across niche markets including ...