1 to 25 of 177 Open Source Jobs in the UK

Opensource Software Engineer

Hiring Organisation
Lorien
Location
Cheltenham, Gloucestershire, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Open Source Software Engineer Location: Cheltenham Are you passionate about open source technologies and building innovative solutions? We are looking for an Open Source Software Engineer to join our team and deliver bespoke solutions across multiple platforms, disconnected networks, and cloud environments. About … Role As an Open Source Software Engineer, you will work within a small, collaborative team to design and develop software solutions based on open source principles. You'll contribute to all stages of the development life cycle, from requirements gathering to deployment, while sharing knowledge ...

Senior Account Executive

Hiring Organisation
Tangent International
Location
United Kingdom
Account Executive – EMEA B2B SaaS/Data Infrastructure/IoT/Streaming/Open Source Join a profitable, well-funded global software company building the backbone of real-time connectivity for modern enterprises. This company is the creator of one of the world’s most widely adopted open-source messaging and data streaming platforms, trusted by developers and enterprises to power mission-critical systems across IoT, industrial automation, energy, automotive, financial services, AI, and event-driven architectures. With deep roots in open source and a strong engineering-led culture, the platform is used globally ...

Digital Verification Engineer

Hiring Organisation
Microtech Global Ltd
Location
Cambridge, Cambridgeshire, East Anglia, United Kingdom
Employment Type
Permanent
Digital Verification engineers in Cambridge. Imagine the innovations we could achieve if production-ready, commercial-grade IP and engineering systems were freely available. Open-source development has the potential to transform the semiconductor industry. Our Ibex CPU and OpenTitan Root of Trust projects have reached production silicon, working … with world-leading partners including Google and combining open-source principles with best-practice chip design methodologies. The Role You will apply industrial-strength design verification to high-quality open-source designs, helping raise verification standards to the highest commercial level. Your work will span block ...

Digital Verification Engineer

Hiring Organisation
Microtech Global Ltd
Location
Cambridge, Cambridgeshire, UK
Employment Type
Full-time
application through as soon as possible. Imagine the innovations we could achieve if production-ready, commercial-grade IP and engineering systems were freely available. Open-source development has the potential to transform the semiconductor industry. Our Ibex CPU and OpenTitan Root of Trust projects have reached production silicon … working with world-leading partners including Google and combining open-source principles with best-practice chip design methodologies. The Role You will apply industrial-strength design verification to high-quality open-source designs, helping raise verification standards to the highest commercial level. Your work will span ...

OSS Developer (Python)

Hiring Organisation
Sanderson Recruitment
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
Salary
£55,000
lead and build a Tech4Good project based in Bristol. You'll be creating and building a community to develop a platform based in an open-source environment The Role: We are looking for an OSS Developer (Python) to join a team to help build, develop and maintain … Community engagement, liaising across multiple teams and stakeholders, including industry, academics and people within the maker/hacker community. Tech stack: Python Django Open source - evolution of code Responsibilities Using high-level expertise, collaborate with key stakeholders to deliver specialist technical services. Develop creative and innovative solutions ...

Senior Full Stack Engineer - .Net

Hiring Organisation
Sanderson Recruitment
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
lead and build a Tech4Good project based in Bristol. You'll be creating and building a community to develop a platform based in an open-source environment The Role: We are looking for an OSS Developer (Python) to join a team to help build, develop and maintain … Community engagement, liaising across multiple teams and stakeholders, including industry, academics and people within the maker/hacker community. Tech stack: Python Django Open source - evolution of code Responsibilities Using high-level expertise, collaborate with key stakeholders to deliver specialist technical services. Develop creative and innovative solutions ...

Senior PyTorch Engineer

Hiring Organisation
Advanced Micro Devices
Location
East Anglia, United Kingdom
Employment Type
Permanent
across training and inference workloads. Framework Enablement : Lead efforts to enhance PyTorch and its ecosystems on AMD GPUs, contributing performance-critical improvements to upstream open-source repositories. Open-Source Intergration : Engage directly with PyTorch and other open-source maintainers to align on requirements, propose ...

Full Stack Developer

Hiring Organisation
83zero Limited
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
+ equity We're hiring for a UK cyber security startup building a platform that helps organisations detect malicious open-source code and secure their software supply chain in real time. The product continuously scans dependencies, surfaces risk clearly, and helps teams prevent compromised packages from entering … curious about cyber security, this is a chance to build something genuinely important. Why this is interesting (especially if you like cyber) Open source and third-party dependencies are now one of the biggest attack paths for modern organisations. This team is tackling that head-on with ...

Senior Full-Stack AI Engineer — Frontend & LLM-Enabled UX (Level 3)

Hiring Organisation
Allegis Global Solutions
Location
London, England, United Kingdom
translate wireframes and prototypes to polished, accessible product UIs. Hands-on experience integrating LLMs/generative models into applications (OpenAI, Anthropic, local/open-source LLMs): prompt engineering, response handling, safety guardrails, RAG architectures. Good understanding of how large language models work, including transformer architecture, tokenization, attention mechanisms … component libraries (Figma workflows, design tokens) Background in regulated industries (healthcare, pharma, finance) with awareness of compliance and data governance constraints. Contributions to open-source projects, public talks or technical writing about LLM-enabled UX or frontend engineering. How to Apply Please submit your CV via the application ...

Cloud Engineer

Hiring Organisation
Ecruit
Location
Liverpool, Merseyside, North West, United Kingdom
Employment Type
Permanent
Salary
£45,000
secure access with Cloudflare Connect internal tools safely using Tailscale/Netbird VPN and access controls Plan smart deployments using co-location and open-source services Work with business teams to roll out SaaS tools that support company growth Keep us compliant with GDPR, HIPAA … Practical experience with Docker, Python, Backup scripts & Monitoring A clear understanding of cloud networking and security Strong communication skills and a proactive approach Promote Open-Source software tools Bonus: Experience with hybrid cloud, monitoring tools, or ML in the cloud What's next If you're ready ...

Senior Python Engineer

Hiring Organisation
Safe Intelligence
Location
City of London, London, United Kingdom
with the latest technologies and trends in Python development and actively contribute to the team's technical knowledge base. Contribute to Machine Learning related Open Source initiatives. Requirements : The technical requirements for the role are: Extensive professional experience as a Python-based developer. Experience with modern Python development … pipelines. Advanced proficiency with code maintenance tools and best practice, including Git and configuring workflows. Experience either contributing to or maintaining Python based open-source projects. Have a passion for code quality and things done right. Additional beneficial experience includes: Familiarity with CUDA and optimising highly parallelised ...

Java Software Engineer

Hiring Organisation
DWP Digital
Location
Preston, Lancashire, UK
Employment Type
Full-time
MongoDB. Able to design and maintain a robust, effective automated test suite to support continuous deployment. Experience of developing large scale systems using open-source technologies using Java 8 or above. You and your role Our Java Software Engineers work on large-scale, high-impact systems used … team. You'll need experience with TDD/BDD, SQL/noSQL databases, cloud-native engineering and of delivering high-quality systems using open-source technologies. Details. Wages. Perks. Hybrid Working: We work a hybrid model - you'll spend some time working at home (40%) and some time ...

Software Engineer

Hiring Organisation
Robertson Geo
Location
Conwy, Gwynedd, Wales, United Kingdom
Employment Type
Permanent, Work From Home
under demanding operational conditions. Key Duties and Responsibilities: Design, develop, and maintain software products as directed by the Software Lead or Senior Management. Ensure source control (Git) is used for all projects, following best practices such as branching and merge strategies. Maintain accurate and up-to-date build documentation … ensure reliability and maintainability. Track, manage, and resolve issues via repository cards (e.g., GitHub Issues, Jira, or equivalent). Research and integrate existing open-source packages where suitable, ensuring all third-party code is properly licensed. Collaborate with hardware, firmware, and geophysics colleagues to deliver integrated solutions. Contribute ...

Senior LLM Engineer / AI Engineer Cheshire

Hiring Organisation
Adria Solutions
Location
Northwich, Cheshire, North West, United Kingdom
Employment Type
Permanent
Salary
£70,000
experimental background. The Role You will: Design, build and deploy LLM-driven features into live products and platforms Work with both commercial and open-source LLMs , selecting the right model for each use case Build and optimise RAG pipelines , embeddings and vector-based retrieval solutions Develop APIs … FastAPI/Flask or similar Strong understanding of trade-offs around accuracy, latency, cost and scalability Highly Desirable Experience working with or fine-tuning open-source LLMs Familiarity with LLMOps (monitoring, evaluation, guardrails, versioning) Experience integrating LLMs into complex or data-heavy systems Docker and Linux experience Background ...

Senior Software Engineer, C++

Hiring Organisation
Ripple
Location
London, England, United Kingdom
full software development lifecycle, including architecture, technical design, C++ development, bug fixing, as well as functional and performance validations. Be part of the open-source XRP ledger community, setting high standards for coding, testing, and deployment. Actively participate in code reviews to maintain the high quality … Ability to learn new technologies and languages quickly. Ability to independently solve highly complex problems with creative solutions. Nice to have: Experience in developing open-source software and contributing to collaborative blockchain communities. WHO WE ARE: Do Your Best Work The opportunity to build in a fast-paced ...

Solutions Engineer

Hiring Organisation
Formance
Location
City of London, London, United Kingdom
ground up, focusing on the flow of funds first to help businesses realize their product visions on a solid financial foundation. Starting with an Open Source Ledger (i.e. a database for financial transactions), we’re building a comprehensive suite of modern financial backend modules, including native and automated … leading SaaS companies and financial institutions like Booksy, Doctolib, and Liberis, along with many others worldwide. Our success stems from the trust in our open-source foundation, the high level of programmability of our solutions, and our software-first approach, moving beyond traditional payment business models. ...

PHP Developer

Hiring Organisation
rcrtr
Location
Newcastle Upon Tyne, England, United Kingdom
debugging (e.g. Chrome Console). Knowledge of eCommerce and payment systems. Configuration and managing databases such as MySQL, Mongo. Working knowledge of various tools, open-source technologies, and cloud services. Agile Methodology. Required Skills PHP and OOP JQuery HTML Less/CSS/Flexbox Apache MySQL/MariaDB … debugging (e.g. Chrome Console). Knowledge of eCommerce and payment systems. Configuration and managing databases such as MySQL, Mongo. Working knowledge of various tools, open-source technologies, and cloud services. Agile Methodology. Pay range and compensation package £40,000-£50,000 plus excellent benefits ...

Embedded Linux Engineer

Hiring Organisation
Platform Recruitment
Location
CB3, Cambridge, Cambridgeshire, United Kingdom
Employment Type
Permanent
Salary
£60000 - £70000/annum
Embedded Linux Engineer : Porting the OS, integrating with ODM software Fixing build issues when moving to new platforms and applying patches to debug open-source software Researching technical growth Requirements: Highly experienced with embedded build systems, preferably buildroot, OpenWRT, or other WRT-Variants Experienced with CLANG and very … confident working with patches on open source software Strong understanding of network protocols Desirable skills for an Embedded Linux Engineer: Experience developing Linux kernel modules and using the kernel build system Knowledge of the Wireless and Linux network stack Experience managing the process from a reference board ...

Java Developer

Hiring Organisation
Experis
Location
Birmingham, UK
Employment Type
Full-time
Jenkins, SonarQube, and Stash Repository. Experience developing in a Linux development environment. Experience working with a suite of Atlassian products. Experience working with open-source database management systems like PostgreSQL. Experience working with AWS services (EC2, SQS, RDS, DynamoDB, S3, Route53, KMS, Cloudwatch). Monitoring using Grafana. Agile ...

Java Developer

Hiring Organisation
Experis
Location
Solihull, West Midlands, United Kingdom
Employment Type
Contract
Jenkins, SonarQube, and Stash Repository. Experience developing in a Linux development environment. Experience working with a suite of Atlassian products. Experience working with open-source database management systems like PostgreSQL. Experience working with AWS services (EC2, SQS, RDS, DynamoDB, S3, Route53, KMS, Cloudwatch). Monitoring using Grafana. Agile ...

Lead Java Developer

Hiring Organisation
Infoplus Technologies UK Ltd
Location
Solihull, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
From £450 to £500 per day Outside IR35
Jenkins, SonarQube, and Stash Repository. Experience developing in a Linux development environment. Experience working with a suite of Atlassian products. Experience working with open-source database management systems like PostgreSQL. Experience working with AWS services (EC2, SQS, RDS, DynamoDB, S3, Route53, KMS, Cloudwatch). Monitoring using Grafana. Agile ...

Java Developer (SC + NPPV3 Cleared)

Hiring Organisation
Syntax Consultancy Limited
Location
Birmingham, UK
Employment Type
Full-time
Jenkins, SonarQube, Git + Stash Repository. AWS Cloud Services (EC2, SQS, RDS, DynamoDB, S3, Route53, Cloudwatch, KMS). Any experience of Linux, Atlassian products, open-source DBs, PostgreSQL, or Grafana monitoring would be helpful. Technical Environment: Quartz, SQL PostgreSQL databases, Aurora, Messaging Services (ActiveMQ), Maven, Jenkins, Junit ...

Java Developer (SC + NPPV3 Cleared)

Hiring Organisation
Syntax Consultancy Limited
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
500/day (Outside IR35)
Jenkins, SonarQube, Git + Stash Repository. AWS Cloud Services (EC2, SQS, RDS, DynamoDB, S3, Route53, Cloudwatch, KMS). Any experience of Linux, Atlassian products, open-source DBs, PostgreSQL, or Grafana monitoring would be helpful. Technical Environment: Quartz, SQL PostgreSQL databases, Aurora, Messaging Services (ActiveMQ), Maven, Jenkins, Junit ...

Full Stack Engineer

Hiring Organisation
Persistent Systems
Location
City of London, London, United Kingdom
Role : Full Stack Engineer Location: Glasgow, UK Hybrid: 2 days to office Job Type : Permanent role Summary: Looking for Expertise in advanced Java and open-source technologies. Skilled in Spring Boot, Hibernate, Microservices, Docker, Kubernetes, JPA, MySQL, SQL Server, Snowflake, REST API, Apache Kafka, Jenkins, CI/ ...

Junior Systems Engineer

Hiring Organisation
Open Answers
Location
Harrow, Greenhill, Greater London, United Kingdom
Employment Type
Permanent
Salary
£30000 - £35000/annum
Junior Systems Engineer/Harrow (Hybrid)/Up to £35K & Great Benefits Open Answers ((url removed)) is a provider of premium quality digital technology services to blue chip customers and the public sector, specialising in cloud systems integration. Customers include British Airways, Allwyn (The National Lottery) and Channel … successful company you will have the opportunity to make the most of and enhance your skills, working as part of a great team. Open Answers provides a happy, respectful and collaborative working environment and we give our employees the freedom to find innovative solutions for themselves. Working conditions ...