76 to 94 of 94 Open Source Jobs in London

Full Stack Developer, Publishing & Journalism

Hiring Organisation
GUARDIAN NEWS AND MEDIA
Location
London, UK
Employment Type
Full-time
whatever direction you choose. Much of our code is openly available on GitHub, and some of our projects are widely used throughout the Open Source community. Many of our developers regularly attend and present at conferences. About you: As a full-stack engineer, you’ll be comfortable working … reviewed by a member of our recruitment team. The closing date for applications is Monday 11th May 2026. All roles at the Guardian are open for everybody to apply. It is important to us that you feel supported and comfortable throughout your recruitment process, in order to perform your ...

Senior Frontend Engineer (React Native) – Fintech | London (Hybrid)

Hiring Organisation
Albert Bow
Location
City of London, London, United Kingdom
product teams Bonus Points • Experience with XState/state management patterns • Exposure to test automation (E2E/unit) • Knowledge of crypto/digital assets • Open-source contributions or technical writing Why This Role? Work on a globally used financial product Tackle real-world challenges in performance, security ...

Programme Lead AI and Machine Learning

Hiring Organisation
Impax Recruitment
Location
London Area, United Kingdom
Programme The programme will involve multiple research workstreams focused on emerging areas of artificial intelligence including: • AI privacy and responsible AI frameworks • Development of open source AI platforms • Data sovereignty and governance in AI systems • Advanced machine learning infrastructure and experimentation Each workstream will consist of specialist machine ...

Interim Group Finance Manager | SaaS Scale-Up

Hiring Organisation
Harmonic Group Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £450 per day
They have a team of bright, passionate people with experience in leading Tech and SaaS scale-ups who are motivated to build the next open-source success story. The Role The Finance Manager will support the CFO closely, with a focus on month end close and group consolidated ...

LEAD CYBER SECURITY ENGINEER

Hiring Organisation
Secure Recruitment Ltd
Location
North London, London, United Kingdom
Employment Type
Permanent, Work From Home
Programming: Highly Proficient in Writing Clean, Scalable & Maintainable Code in Python & Go. Continuous Innovation: A Proactive, Ownership-Driven Mindset, ideally Demonstrated by Contributions to Open-Source Projects or success in Capture the Flag (CTF) Competitions. B2B Start - Up/Scale - Up Pedigree: Experience of working in Fast-Moving ...

SOC Manager

Hiring Organisation
Circle Recruitment
Location
London, UK
Employment Type
Full-time
intelligence and assessment in the context of the organisation to stakeholders by gathering and analysing information to identify and mitigate cyber threats from both open-source (OSINT) and commercial threat intelligence. Proven experience operating cyber security solutions and tools e.g. Security Information and Event Management (SIEM), maintaining security ...

SOC Manager

Hiring Organisation
Circle Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £850 per day
intelligence and assessment in the context of the organisation to stakeholders by gathering and analysing information to identify and mitigate cyber threats from both open-source (OSINT) and commercial threat intelligence. Proven experience operating cyber security solutions and tools e.g. Security Information and Event Management ( SIEM ), maintaining security ...

Senior Product Marketing Manager - Studio

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life. We democratise AI through high-performance, optimised, open-source and cutting‐edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise as well as personal needs. ...

Technical Customer Success Manager

Hiring Organisation
PostHog
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
their business from their first day, to the day they IPO, and beyond. The operating system for folks who build software. We started with open-source product analytics, launched out of Y Combinator's W20 cohort . We've since shipped more than a dozen products , including ...

Technical Customer Success Manager

Hiring Organisation
PostHog
Location
London, UK
their business from their first day, to the day they IPO, and beyond. The operating system for folks who build software. We started with open-source product analytics, launched out of Y Combinator's W20 cohort. We've since shipped more than a dozen products, including: A built ...

Technical Account Manager

Hiring Organisation
PostHog
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
their business from their first day, to the day they IPO, and beyond. The operating system for folks who build software. We started with open-source product analytics, launched out of Y Combinator's W20 cohort . We've since shipped more than a dozen products , including ...

Forward Deployed AI Operators

Hiring Organisation
SilverTree Equity
Location
City of London, London, United Kingdom
faster. Successful FDEs are: Scrappy. Curious. Action-oriented. Resilient. Ownership-driven. Whether that mindset shows up through side projects, community builds, freelance hacks, competitions, open-source contributions, or experimentation, we're interested in how you can think, learn, and build. Programme: Built Upon a Dual Structure FDEs will … their first few years at a traditional firm. Fully-formed FDEs have: Deep, real-world AI experience An impressive portfolio of shipped impact Open doors to future strategic and leadership roles ...

Head of Cyber Security WCC623727

Hiring Organisation
Jobleads-UK
Location
City of Westminster, England, United Kingdom
risk in a local government context. Your technical background gives you deep knowledge of modern security practices across services, infrastructure, hosting and platforms, including opensource technologies and modern software development approaches. You’re comfortable working across cloud and on‐premise environments, using tools such as identity …/or have been racialised as 'ethnic minorities' (formally known as B.A.M.E, Black, Asian and Multiple Ethnic) background and, while the role is open to all applicants, we will utilise the positive action provisions of the Equality Act 2010 to appoint a candidate from a global majority background where ...

Lead Functional Consultant

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
meet and learn from people from an amazing array of nationalities and cultures. We’re extremely proud of the way we work and the open culture we’ve developed. Key Responsibilities Team Leadership Support Lead and line-manage a team of Functional Consultants working across CRM and website projects. … London. We offer flexible hours and a real “team” mentality, working together to make things better. Uniquely, we base all of our solutions on open source products, helping our work to have the greatest possible impact. We offer a full suite of software options for our clients ...

Senior Rust Engineer for Autonomous Testing (London)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
help build the future of autonomous testing. The role requires proficiency in Rust and experience with property-based testing. You'll maintain the open-source project Bombadil and work with various technologies like Chromium automation. This is a hybrid position based in London, emphasizing in-person interactions ...

Senior/Staff Engineer - Bombadil

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
think you could be a fit; drop us a note. In this role you will be part of the team that maintains our open-source project Bombadil (https://github.com/antithesishq/bombadil). This includes working with the specification language and verifier, Chromium automation, advanced ...

Channel Manager - SaaS - Iberia

Hiring Organisation
3Search
Location
City of London, London, United Kingdom
they reach production. Their platform supports more than 30 programming languages and is trusted by millions of developers worldwide. With deep roots in the open-source community and a strong mission to help development teams build better software, the organisation offers an innovative, collaborative environment where the Partner ...

Principal Machine Learning Researcher (Privacy/Risk) | | Series A - Drug discovery Platform | Fully Remote, EU/UK | Base Salary Up to £160,000K, plus early equity+benefits

Hiring Organisation
Owen Thomas | Pending B Corp™
Location
East London, London, United Kingdom
distillation, benchmarking, and evaluation. Define preprocessing and harmonization strategies for diverse assay datasets used in ADMET modeling. Author or contribute to scientific publications or open-source software where appropriate. 3 Month Plan: Develop a working understanding of the product, federated training setup, and key life-sciences modelling ...

Attack Surface Management Analyst

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
whether they may be affected and actions they can take. Technical testing ; vulnerability scanning, attack surface discovery, manual exploit validation, light‐touch pentesting and OpenSource Intelligence (OSINT) gathering Client Engagement ; translating client challenges into solutions that fit S‐RM’s ASM service offerings and value proposition, understanding ...