51 to 75 of 230 Open Source Jobs in London

to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier 1 banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 … distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision-making Embed AI into engineering workflows & ops Self-motivated, problem-solving mindset; open to non-traditional backgrounds. You should have: Expert backend skill ideally in Golang, or Rust, Zig or C. Deep expereince building distributed systems from scratch. Experience in greenfield projects … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. Apply within if your skillset matches! Please More ❯

to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier 1 banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 … distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision-making Embed AI into engineering workflows & ops Self-motivated, problem-solving mindset; open to non-traditional backgrounds. You should have: Expert backend skill ideally in Golang, or Rust, Zig or C. Deep expereince building distributed systems from scratch. Experience in greenfield projects … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. Apply within if your skillset matches! Please More ❯

responsibilities Define and champion the technical strategy for services, ensuring alignment with user needs and business goals Lead technical specialists across multiple projects, solving architectural challenges. Design and assure open-source, user-centred systems in agile environments. Own the technical design and evolution of services, including integration and interoperability. Provide technical governance and present designs to boards such … governance boards and ensuring alignment with standards. Previous or current experience developing web services using Python/Django and/or NodeJS/React with knowledge of cloud technologies, open-source technologies and secure system design. Proven leadership in guiding technical teams, delivering user-focused services in agile environments and communicating complex concepts to varied stakeholders. Desirable skills More ❯

the reliability and stability of the SDK. Collaborate with cross-functional teams, including product managers, designers, and infrastructure experts, to address challenges and deliver exceptional results. Engage with the open-source community, participate in discussions, and contribute to related projects, aligning with Vercel's commitment to giving back to the developer community. Actively gather feedback from developers and … use it to drive continuous improvement and innovation in the AI SDK. About You: You have at least 5+ years of relevant experience Experience contributing to or participating in open source projects Excellent communication skills and the ability to work effectively in a collaborative team environment Competitive compensation package, including equity. Learn and Grow - we provide mentorship and More ❯

the mission, using large language models (LLMs) to automate complex systems and empower engineering teams worldwide. This is your chance to work with cutting-edge transformer architectures and essential open-source tools to solve core infrastructure challenges at a massive scale. As a key member of the team, you'll take full ownership of designing and scaling advanced … and researchers dedicated to responsible, scalable AI. Your growth is supported with dedicated research time, a flexible hybrid model, and the opportunity to advance the field through publications and open-source contributions. If you're driven to build AI that delivers tangible value, this is the role for you. What You'll Do Conduct advanced research and implement More ❯

AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life. We democratize AI through high-performance, optimized, open-source and cutting-edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on-premises or in cloud environments. Our offerings include … mindset and willingness to "roll up your sleeves" to get things done. Commitment to responsible AI, including fairness, transparency, and accountability in content usages. Knowledge of US copyright law, open-source licensing, or AI/ML technologies is a strong plus. Benefits Competitive cash salary and equity Food : Daily lunch vouchers Sport : Monthly contribution to a Gympass subscription More ❯

Associate Analyst & Researcher – OSINT & Cyber Investigations 📍London (Hybrid) | Full Time Are you a recent graduate with a passion for open-source intelligence, digital investigations and the fast-moving world of cyber threats? We’re looking for a curious and motivated Associate Analyst & Researcher to join us at North Quay Holdings, a boutique investigations firm based in central London. … About Us At North Quay, we help clients understand and manage their digital risk. We work where open-source intelligence, cyber security and multiple other intelligence sources meet, using publicly available information to uncover insights that protect people and organisations online. Our work is driven by curiosity, critical thinking and a strong ethical approach. We believe intelligence should More ❯

Associate Analyst & Researcher – OSINT & Cyber Investigations 📍London (Hybrid) | Full Time Are you a recent graduate with a passion for open-source intelligence, digital investigations and the fast-moving world of cyber threats? We’re looking for a curious and motivated Associate Analyst & Researcher to join us at North Quay Holdings, a boutique investigations firm based in central London. … About Us At North Quay, we help clients understand and manage their digital risk. We work where open-source intelligence, cyber security and multiple other intelligence sources meet, using publicly available information to uncover insights that protect people and organisations online. Our work is driven by curiosity, critical thinking and a strong ethical approach. We believe intelligence should More ❯

Associate Analyst & Researcher – OSINT & Cyber Investigations 📍London (Hybrid) | Full Time Are you a recent graduate with a passion for open-source intelligence, digital investigations and the fast-moving world of cyber threats? We’re looking for a curious and motivated Associate Analyst & Researcher to join us at North Quay Holdings, a boutique investigations firm based in central London. … About Us At North Quay, we help clients understand and manage their digital risk. We work where open-source intelligence, cyber security and multiple other intelligence sources meet, using publicly available information to uncover insights that protect people and organisations online. Our work is driven by curiosity, critical thinking and a strong ethical approach. We believe intelligence should More ❯

Associate Analyst & Researcher – OSINT & Cyber Investigations 📍London (Hybrid) | Full Time Are you a recent graduate with a passion for open-source intelligence, digital investigations and the fast-moving world of cyber threats? We’re looking for a curious and motivated Associate Analyst & Researcher to join us at North Quay Holdings, a boutique investigations firm based in central London. … About Us At North Quay, we help clients understand and manage their digital risk. We work where open-source intelligence, cyber security and multiple other intelligence sources meet, using publicly available information to uncover insights that protect people and organisations online. Our work is driven by curiosity, critical thinking and a strong ethical approach. We believe intelligence should More ❯

Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or contributing to open-source Camunda extensions Already holding UK security clearance (SC, DV, eDV) What They Offer A company option scheme gives their employees a stake in the organisation theyre building More ❯

Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or contributing to open-source Camunda extensions Already holding UK security clearance (SC, DV, eDV) What They Offer A company option scheme gives their employees a stake in the organisation they’re More ❯

Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or contributing to open-source Camunda extensions Already holding UK security clearance (SC, DV, eDV) What They Offer A company option scheme gives their employees a stake in the organisation theyre building More ❯

Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or contributing to open-source Camunda extensions Already holding UK security clearance (SC, DV, eDV) What They Offer A company option scheme gives their employees a stake in the organisation they’re More ❯

and supporting systems and platform integrations. An excellent understanding of a wide range of integration strategies and techniques across a diverse mix of technology environments and architectures, from fully open source/bespoke environments through to fully proprietary, Enterprise and COTS-based. Strong scripting/programming skills - SQL essential, others such as Python, Java/JavaScript, C# very More ❯

and supporting systems and platform integrations. An excellent understanding of a wide range of integration strategies and techniques across a diverse mix of technology environments and architectures, from fully open source/bespoke environments through to fully proprietary, Enterprise and COTS-based. Strong scripting/programming skills - SQL essential, others such as Python, Java/JavaScript, C# very More ❯

security in line with ISO27001 and Cyber Essentials Plus Development and maintenance of AI system focused on intelligence analysis and processing Development and maintenance of the data repositories, including source, geospatial and open-source intelligence Liaise with client stakeholders within various defence organisations Requirements: understand how to apply it to improve client operations, specifically situational awareness and More ❯

/or Windows systems About you (ideally): • Demonstrate a working knowledge of DevOps and Platform Engineering practices such as CI, CD, Infra as Code, Cloud, Monitoring • A passion for open-source programming or commercial tooling • A strong background in ability to lead initiatives • Experience in building up and mentoring teams highly desirable • Being part of implementing end to More ❯

team environment Excitement about working in a dynamic role with the autonomy and freedom you need to take ownership of problems and see them through to execution Contributions to open-source projects or personal side projects demonstrating passion for software development We like people who combine expertise and ambition with optimism who are interested in changing the world More ❯

toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch) and open-source contributions (especially Python-based) would be a bonus. Familiarity with CUDA, GPU-based computations, end-to-end neural network training, MLOps, and academic research in machine learning More ❯

toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch) and open-source contributions (especially Python-based) would be a bonus. Familiarity with CUDA, GPU-based computations, end-to-end neural network training, MLOps, and academic research in machine learning More ❯

toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch) and open-source contributions (especially Python-based) would be a bonus. Familiarity with CUDA, GPU-based computations, end-to-end neural network training, MLOps, and academic research in machine learning More ❯

toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch) and open-source contributions (especially Python-based) would be a bonus. Familiarity with CUDA, GPU-based computations, end-to-end neural network training, MLOps, and academic research in machine learning More ❯

Software Engineerlocations: London, GBRtime type: Full timeposted on: Posted Todaytime left to apply: End Date: September 30, 2025 (21 days left to apply)job requisition id: R28723FactSet creates flexible, open data and software solutions for over 200,000 investment professionals worldwide, providing instant access to financial data and analytics that investors use to make crucial decisions.At FactSet, our values … both the development and systems world, writing software that helps scale the systems and applications that we support for our internal consumers. The team provides a wide breath of open-source projects and technologies as-a-service, including Docker, PostgreSQL, Redis, and Kafka. We use tools like Packer, Terraform, Chef, and Prometheus to manage our hybrid-cloud infrastructure … A global community dedicated to volunteerism and sustainability, where collaboration is always encouraged, and individuality drives solutions. Career progression planning with dedicated time each month for learning and development. open to all employees that serve as a catalyst for connection, growth, and belonging. Learn more about our benefits .Salary is just one component of our compensation package and is More ❯

customer operations, financial crime, and data, to name just a few areas. As a bank, there is scope for impact across a huge number of opportunities. We contribute to open source software as much as possible. Our blog is a good place to learn even more about what we do Your day-to-day This role is all … base salary plus stock options We can help you relocate to the UK We can sponsor visas. This role can be based in our London office, but we're open to distributed working within the UK (with ad hoc meetings in London). We offer flexible working hours and trust you to work enough hours to do your job More ❯