226 to 250 of 276 Open Source Jobs

Chief Technology Officer

Hiring Organisation
Big Red Recruitment
Location
Reading, England, United Kingdom
experienced CTO looking for a high-impact transformation role, or a Head of Engineering ready to take the step into their first CTO position. Open source development knowledge is key but you’ll also inherit a knowledgeable engineering team and play a key role in transforming a legacy ...

Founding Engineer

Hiring Organisation
Explore Group
Location
London Area, United Kingdom
building REST APIs using NestJS or Express Or Python Experience with MongoDB or similar databases Evidence of building independently, for example side projects, startups, open source work Experience in a company with fewer than 50 employees High agency and comfort operating in fast moving environments Nice to have ...

Java Engineers - Senior / Lead

Hiring Organisation
numi
Location
City of London, London, United Kingdom
standards and a commitment to building trust-based software. Nice to Have Previous experience in a fintech or high-growth startup environment. Contributions to open-source projects or a background in building custom tooling. Familiarity with cross-functional "tribe and squad" working models. Why Join ...

Vice President - Ontologist - Data Scientist Lead

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Experience with data standards and ontologies for Data and Financial services. Contributions to Ontology community, such as papers, conference presentations, industry standard contributions, or open source contributions. #J-18808-Ljbffr ...

Customer Success Engineer

Hiring Organisation
Abacus.AI
Location
England, United Kingdom
autonomous task execution, and customizable AI agents for chatbots, workflows, and enterprise automation. We also contribute to the AI community through LiveBench.ai benchmarking and open-source projects like Dracarys and Smaug. We make sophisticated AI and machine learning capabilities accessible to organizations regardless of size or technical resources. ...

Senior Test Manager

Hiring Organisation
KPMG UK
Location
London, UK
Consulting environment In-depth understanding, knowledge and experience of the testing industry to include: testing services (type, costing, route to market), tools (commercial/open-source, selection and implementation), practices (methods by SDLC-type, test accelerators), metrics (selection, implementation), and key players (suppliers, tool vendors, industry “regulators”). ...

Senior Test Manager - Public Sector

Hiring Organisation
KPMG UK
Location
London Area, United Kingdom
Consulting environment In-depth understanding, knowledge and experience of the testing industry to include: testing services (type, costing, route to market), tools (commercial/open-source, selection and implementation), practices (methods by SDLC-type, test accelerators), metrics (selection, implementation), and key players (suppliers, tool vendors, industry “regulators”). ...

Senior Product Marketing Manager (B2B)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
France, focused on developing advanced large language models. We are a pioneering AI company on a mission to democratize artificial intelligence through high-performance, open-source, and optimized models. About the Role Mistral AI is seeking a Senior Product Marketing Manager to shape how we communicate and scale ...

Head of Data Science

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
store, MLOps, or experimentation platform infrastructure. Experience in establishing experimentation and A/B testing as an organisational practice. Thought leadership – blog posts, talks, opensource contributions. Experience making DS a 'core function' at a company where it previously wasn't. Benefits Real data, real scale. Millions ...

Senior Talent Acquisition Lead

Hiring Organisation
Ultralytics
Location
London Area, United Kingdom
Sales, Solutions, Customer Success, Partnerships) in developer-led products. Familiarity with OKR frameworks and operating cadences that drive measurable recruiting outcomes. Prior exposure to open-source or developer ecosystems (e.g., Ultralytics GitHub). Passion for what we build and how it’s used by teams worldwide … improvement. Strive for excellence: Perseverance and attention to detail. Actions, not words: Focus on delivering meaningful results. Act with urgency: Seize fleeting opportunities. Open access to all: Transparent communication and collaboration. Learn more in our Ultralytics Handbook and values. 💰 Compensation and benefits We reward excellence and impact — not just ...

Intelligence Analyst (OSINT / Crypto)

Hiring Organisation
BlackScore
Location
City of London, London, United Kingdom
scale. Our analysts don't just use the platform — they help shape how it thinks. What you'll do Conduct deep OSINT investigations across open web, dark web, and social platforms. Support cryptocurrency tracing and blockchain intelligence workflows — following the money across chains, wallets, and exchanges. Produce structured intelligence … darknet market analysis. Geospatial and telecom intelligence background is equally valued — if you can read cell tower data, analyze movement patterns, or geolocate from open source imagery, we want to talk. You're comfortable working with AI-assisted analysis tools and understand both their power and their limits. ...

Solution Architect

Hiring Organisation
Forward Role
Location
Gloucester, Gloucestershire, UK
Employment Type
Full-time
experienced Solution Architect to drive the design and implementation of innovative digital services within the UK public sector. This role focuses on leveraging modern open-source technologies within Agile and DevOps environments to deliver high-quality, ... ZIPC1_UKTJ ...

Lead Software Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Cheltenham, Gloucestershire, UK
Employment Type
Full-time
secure backend platforms used by National Security and Defence customers. You'll work on modern cloud-based systems using a mix of commercial and open-source technologies across private and public cloud environments. What you'll be doing Designing, building, deploying and ... LFWQ1_UKTJ ...

Senior Android Developer

Hiring Organisation
Mpower Plus UK Ltd
Location
Bristol, Somerset, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
design principles, design patterns, and industry best practices Experience with offline data storage , multi-threading, and application performance optimisation Familiarity with the Android open-source ecosystem , including commonly used libraries and tools for benchmarking and optimisation Proficient in Google's Android design guidelines , with hands-on experience using ...

Software Engineer

Hiring Organisation
Platform Recruitment
Location
London, United Kingdom
Employment Type
Permanent
Salary
£80000 - £115000/annum
commercial C++ expertise Significant bias towards C++ development Genuine passion for writing clean, performant code Bonus if : Commercial C++ experience Have worked on open-source projects Have an activity portfolio of personal C++ projects Full details are available. Please don't hesitate to get in touch. ...

Senior Firmware Engineer

Hiring Organisation
Platform Recruitment Limited
Location
Sandy, Bedfordshire, South East, United Kingdom
Employment Type
Permanent
Salary
£95,000
Several years of commercial experience in cellular or RF firmware. Bonus Skills Familiarity with TI DSP architecture or Xilinx SoC development toolchains Experience with open-source SDR tools like srsRAN or PCI-based host-to-DSP communication architectures. If you are a proactive problem-solver ready to take ...

Embedded Software Engineer

Hiring Organisation
Mansell Recruitment Group
Location
Southampton, Hampshire, United Kingdom
Employment Type
Permanent
Salary
£45000 - £65000/annum
Implement and troubleshoot hardware interfaces and data protocols (e.g., CAN, UART, TCP/IP) Build and maintain user-facing applications using both commercial and open-source toolkits Work closely with hardware and firmware engineers to align system-level behaviour Assist in scoping projects, breaking down requirements, and mentoring ...

Security Operations Room Operator

Hiring Organisation
Sapient Insight
Location
City of London, London, United Kingdom
Company Description Sapient Insight specializes in providing clients with actionable insights derived from digitized human networks and open-source analytical software. With a focus on discovering verified and novel information, Sapient Insight empowers clients to make informed, strategic decisions by offering a competitive advantage. By combining cutting-edge ...

AI Engineer

Hiring Organisation
Formula
Location
United Kingdom
modern AI tooling (Cursor, Claude) A product mindset: you identify what teams actually need and drive adoption Bonus: Voice AI/multimodal experience or open-source AI contributions If you want to build at the intersection of cutting-edge AI and Web3 infrastructure, with real ownership and outsized ...

Lead Software Engineer

Hiring Organisation
Understanding Recruitment
Location
City Of London, England, United Kingdom
Enhance overall system efficiency, expandability, and dependability within distributed robotic setups. Experience you'll need: Production experience with Rust , or contributions to production grade open source repos. 2+ Years. Experience working with Tokio , or other asynchronous frameworks such as async.std or Smol. Ideally a background in a core ...

Lead Software Engineer

Hiring Organisation
Understanding Recruitment
Location
St. Albans, Hertfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£120,000 - £151,000 per annum
Enhance overall system efficiency, expandability, and dependability within distributed robotic setups. Experience you'll need: Production experience with Rust , or contributions to production grade open source repos. 2+ Years. Experience working with Tokio , or other asynchronous frameworks such as async.std or Smol. Ideally a background in a core ...

Technical Lead Ruby TypeScript - Developer Experience

Hiring Organisation
Client Server
Location
East London, London, United Kingdom
Employment Type
Permanent, Work From Home
evolution, mentoring more junior engineers and reviewing contributions, raising the technical bar across the team. You'll also guide and manage external contributors and open-source collaboration and act as a key interface with the developer community, incorporating feedback into product direction. Location/WFH: You can work ...

Head of Engineering

Hiring Organisation
Lightdash
Location
City of London, London, United Kingdom
moving at startup speed Establish a culture where iteration is celebrated and perfectionism is challenged How we work at Lightdash We build in public. Open source means moving fast with shared context. We challenge problems, not people. No blame, just solutions. We’re highly collaborative. Independent ...

Member of Technical Staff

Hiring Organisation
Geometric
Location
City of London, London, United Kingdom
Deep Learning, Category Theory, Neuroevolution, Megakernels, or the work of François Chollet, Kenneth Stanley, Jeff Clune, Jurgen Schmidhuber, David Ha, and Christian Szegedy Bonus Open-source kernel contributions (FlashAttention, FlashInfer, vLLM, Unsloth, Liger-Kernels, ThunderKittens) Publications in ML/AI, kernel optimisation or evolutionary methods (NeurIPS, ICLR, CVPR ...

Cloud Engineer

Hiring Organisation
HCL Global System INC
Location
Merrimack, New Hampshire, United States
Employment Type
Permanent
Salary
USD Annual
expertise with a passion for exploring and implementing new emerging technologies while working in an open and transparent way. We are passionate about opensource contribution, sharing our expertise and knowledge with the engineering community, participating in foundations like the CNCF, CDF and FINOS while embracing a continuous learning approach ...