526 to 550 of 1,226 Permanent Open Source Jobs

Research Engineer, Pretraining Scaling - London

Location
Greater London, England, United Kingdom
Also Have Previous experience training LLM’s or working extensively with JAX/TPU, PyTorch, or other ML frameworks at scale Contributed to open-source LLM frameworks (e.g., open_lm, llm-foundry, mesh-transformer-jax) Published research on model training, scaling laws, or ML systems Experience with ...

Security Analyst (T-ISAC)

Location
Greater London, England, United Kingdom
role As the Security Analyst (T-ISAC) you will be driving T-ISAC threat intel sharing platform’s day-to-day, combining sensitive source data with open-source insights and telecoms professional knowledge from the wider telecoms and cyber security community to facilitate intelligence exchange, capture emerging ...

Senior ML Platform Engineer (GenAI Platform)

Location
Greater London, England, United Kingdom
infrastructure. Familiarity with evaluation suites, prompt management, vector databases, or customized GenAI observability tooling. Experience with Metaflow, Databricks, or AWS SageMaker. Knowledge of hosting open‐source foundation models, optimizing GPU compute, dynamic scaling, and infrastructure cost controls. Familiarity with agentic workflows, multi-agent frameworks and tool‐use patterns. … love it at Preply: An open, collaborative, dynamic, and diverse culture; A generous monthly allowance for lessons on Preply.com, Learning & Development budget, and time off for your self-development; A competitive financial package with equity, leave allowance and health insurance; Access to free mental health support platforms; Access ...

Senior / Principal Applied AI Engineer (UK / Europe, Remote)

Location
United Kingdom
Build agent loops, tool-calling, structured outputs, planning/state management, retries, guardrails, and orchestration layers on top of LLM provider APIs (Anthropic, OpenAI, open-weight models, MCP). Ship internal AI automations to remove engineering/support/growth toil by integrating with existing tooling (GitHub, Slack, Intercom … eval harnesses, tracing, fallback chains, spend controls). Operate within security and AI governance constraints (SOC 2/ISO, approved-tooling allowlist) and handle source/customer/product data responsibly. Requirements Must-haves 8+ years of production software engineering experience with deep expertise in APIs, integrations, REST, webhooks ...

Member of Technical Staff, Data Flywheel

Location
Greater London, England, United Kingdom
Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future of AI. Our mission: make intelligence open and accessible to all. Role Overview … post-training, and live deployments. You'll collaborate closely with researchers and engineers across the company, as well as customers, partners, vendors, and the open-source community. What You’ll Do Identify high-value data sources and partnership opportunities, deeply understand the underlying use cases, and translate them ...

Principal Software Engineer

Location
Greater London, England, United Kingdom
policy‐as‐code and self‐service tooling. Event‐driven architecture, and experience of legacy modernisation or migration programmes. Contribution to the wider engineering community — open source, writing, speaking or standards work. Your approach to work: Pragmatic. You optimise for outcomes and maintainability, not for elegance or novelty. Generous. … Evidence‐led. You hold strong opinions loosely and change your mind when the data says so. Direct and kind. You disagree well, in the open, and commit fully once a decision is made. Curious and current. You keep learning fast in a field that is moving fast ...

Senior AI Software Engineer, Coding Agent

Location
Greater London, England, United Kingdom
capabilities. Who We Look For Customer‐oriented and able to thrive in a fast‐paced environment. Positive, self‐motivated, and passionate. Independent, insistent, and open‐minded. Great team player, dependable and autonomous. Data‐driven decision maker. Requirements 8+ years of professional software engineering experience, with a strong background … expertise in Retrieval‐Augmented Generation (RAG) and AI Agent architectures. Deep, hands‐on experience with LLM APIs and/or fine‐tuning and serving open‐source models. Strong understanding of prompt engineering and context engineering to maximize model relevance and accuracy. Excellent problem‐solving skills and the ability ...

Principal ML Engineer: Speech AI & Production

Location
Cambridge, England, United Kingdom
pipelines, and containerization (Docker, Kubernetes) With preferred backgrounds covering some of the following: Experience with speech-to-text or text-to-speech Contributions to open-source projects or published research in top-tier conferences We encourage you to apply even if you do not feel you match … exhaustive. If you are interested in the role, the team, and our mission, we would love to consider your application. We are always open to conversations and look forward to hearing from you. Who we are: Speechmatics is the leading expert in Speech Intelligence, and uses AI and Machine ...

Software Development Lead, Data and Analytics

Location
Greater London, England, United Kingdom
integral part of a focused team where you can make a real impact. You’ll be surrounded by an open, collaborative culture that embraces diversity, recognition, professional development and, most importantly, you. Are you ready to make your impact? About The Role The Software Solutions team is a high … engagements spanning corporate strategy, litigation, investigations, disputes, compliance, regulatory support, financial crime, fraud, and performance improvement. The team employs a range of modern open source and cloud technologies to design, build, and deliver solutions. This specialized team creates scalable and feature‐rich web applications using a continuously evolving ...

AI Field Engineer, EMEA

Location
Greater London, England, United Kingdom
Atreides, Benchmark Capital, Index Ventures, Lightspeed, NVIDIA, Sequoia Capital, and TCV, Fireworks powers production AI with hundreds of state-of-the-art open models across text, image, embedding, audio, and multimodal workloads. Today, Fireworks is a Series D company valued at $17.5 billion, bringing together an ambitious, collaborative team … cheaper than the mega-cluster narrative suggests: we ran cross-region rollouts using 98% sparse weight deltas and published what we learned. (blog) Open source agents with frontier advisors: matching frontier performance through training and harness engineering. (blog) The fine-tuning bottleneck is not the algorithm: integration friction ...

Data Science & AI Delivery Lead

Location
Greater London, England, United Kingdom
allocation to ensure the team is effectively deployed against priorities. Technology Vision: Stay current with the rapidly evolving AI landscape, including new foundation models, open‐source frameworks, vector databases, orchestration tools (e.g., LangChain, Semantic Kernel), and evaluation methodologies. Bring new ideas to the team and lead proof … bring your own experience and expertise to the table so, while there are some qualifications and experiences we need you to have, we are open to discussing how your individual knowledge might lend itself to fulfilling this role and help us achieve our goals. What you need to have ...

Senior Java Engineer - Core / Infra - Elasticsearch

Location
United Kingdom
Elasticsearch. Solving difficult issues, including performance or concurrency issues, and proposing solutions. Improving operation and observability of Elasticsearch cloud systems. Collaborating in the open with the ES team, Elastic users, and other supporting open source projects. Supporting our support engineers with the harder problems. Owning operational investigations ...

Senior Consultant, Digital & Insights, Data Science | Strategic Communications

Location
Greater London, England, United Kingdom
integral part of a focused team where you can make a real impact. You’ll be surrounded by an open, collaborative culture that embraces diversity, recognition, professional development and, most importantly, you.Are you ready to make your impact?**About The Role**We are looking for a talented and ambitious … approaches to investigate and interpret data* Work with other data scientists to build and support custom solutions, applications and processing pipelines* Interrogate multiple data source and extract insights by combining information from each* Detect hidden patterns, identify trends, reveal drivers, predict developments, visualise similarities and differences, and otherwise leverage ...

Software Engineer

Location
Welwyn, England, United Kingdom
Roche you can show up as yourself, embraced for the unique qualities you bring. Our culture encourages personal expression, open dialogue, and genuine connections, where you are valued, accepted and respected for who you are, allowing you to thrive both personally and professionally. This … robust scientific software solutions, data flows, and pipelines across key domains including Research Biology, Drug Discovery, and Translational Medicine. Innovate with impact by applying Open Source, Cloud-First, API-First, and AI-First methodologies to complex problem-solving. Drive continuous growth by sharpening your software engineering skills ...

Senior Solutions Architect (Data & AI) - Leeds based

Location
Leeds, England, United Kingdom
Databricks certifications Prior experience at Databricks, Snowflake, AWS, Google, Microsoft, or a top-tier data/AI company Published thought leadership (blogs, conference talks, open source contributions) Industry experience in Retail or Consumer Packaged Goods with executive-level domain credibility About Databricks Databricks is the Data … ability, political affiliation, race, religion, sexual orientation, socio-economic status, veteran status, and other protected characteristics. Compliance If access to export-controlled technology or source code is required for performance of job duties, it is within Employer's discretion whether to apply for a U.S. government license for such ...

AI Infrastructure Engineer

Location
Greater London, England, United Kingdom
Experience with AWS or other major cloud providers. Production experience with Python in ML or infrastructure contexts. Demonstrated passion for technology through personal projects, open source, meetups, or publishing content about your work and learnings #LI-Hybrid Unleash Your Potential When you join Salesforce, you’ll be limitless … providing flexibility to work from home. We expect employees to be in the office at least three days per week. We have a radically open and accepting culture at Fin. We avoid spending time on divisive subjects to foster a safe and cohesive work environment for everyone. ...

Research Engineer, AI, Digital & Data

Location
Greater London, England, United Kingdom
work, such as tooling for user simulation or for integrating local expert input to improve evaluation accuracy.* Write well-tested, documented code for open release, and prepare our tooling for long-term stewardship by partner organizations.* Share knowledge and expertise with our partners and other stakeholders in the countries … interaction with web or mobile apps (e.g., with Playwright for end-to-end testing).* Experience with multilingual NLP.* Experience contributing to or maintaining open-source software.* Experience with frontend deployments. *We know great candidates won’t always meet every listed qualification. Research shows that some groups ...

Staff Release Engineer

Location
West of England, England, United Kingdom
Lead the high-level design and long-term roadmap definition for building, scaling, and governing the systems and practices that reliably move software from source to production through centralized developer tooling across all Kaluza engineering domains. Drive Engineering Productivity & SRE Practices: Strategize and embed automated deployment & release mechanisms, testing … Integration Experience: Hands-on experience integrating large language models into production applications or developer workflows, whether via APIs (e.g., OpenAI, Anthropic, AWS Bedrock) or open-source models, with a solid understanding of prompt engineering, context management, and evaluation. AI Tooling Advocacy: A track record of introducing AI-assisted ...

Senior Specialist Solutions Architect, Bedrock, WWSO Startups

Location
Greater London, England, United Kingdom
Guide and support the AWS internal community of technical subject matter experts aligned to Bedrock and Managed Inference. Create field enablement materials, demo assets, open-source samples, and workshop content for the broader SA population. A day in the life The WWSO team helps customers adopt our newest … above in engineering, management, or technology, or Master's degree or above in computer science, engineering, mathematics or equivalent Familiarity with foundation models, open-weight and frontier models, world models, and agentic frameworks used by Startups Familiarity with Agentic AI architectures — multi-agent orchestration, tool-use patterns, MCP (Model ...

Senior Sales Engineer

Location
Greater London, England, United Kingdom
some vertical industry experience, especially in Financial Services, Retail, Travel, Transport & Leisure or Public Sector. Active engagement in the technical or developer community (e.g., open‐source contributions, technical blogging, or community mentorship). Proven track record of designing reusable implementation guides, integration playbooks, or localization toolkits for global … scammers may ask for money or personal information by offering fake job opportunities through e‐mail, text message or social media. Please verify the source of any job‐related communications carefully. All official Zendesk communications are conducted through "@zendesk.com" email addresses. If you encounter suspicious messages, do not respond ...

Staff/Principal Machine Learning Scientist - Ranking & Retrieval

Location
Greater London, England, United Kingdom
Retrieval London, United Kingdom About Tripadvisor The Tripadvisor Group connects people to experiences worth sharing, and aims to be the world’s most trusted source for travel and experiences. We leverage our brands, technology, and capabilities to connect our global audience with partners through rich content, travel guidance … strong track record of academic or industry contributions, including publications in top‐tier AI/IR conferences (e.g., SIGIR, KDD, RecSys, NeurIPS) or open‐source ML contributions. What We Offer Competitive compensation packages (routinely benchmarked against the latest industry data), including base salary and annual bonuses “Work your ...

Principal Machine Learning Scientist (Experiences)

Location
Greater London, England, United Kingdom
Experiences) London, United Kingdom About Tripadvisor The Tripadvisor Group connects people to experiences worth sharing, and aims to be the world’s most trusted source for travel and experiences. We leverage our brands, technology, and capabilities to connect our global audience with partners through rich content, travel guidance … strong track record of academic or industry contributions, including publications in top-tier AI/IR conferences (e.g., SIGIR, KDD, RecSys, NeurIPS) or open-source ML contributions. What We Offer Competitive compensation packages (routinely benchmarked against the latest industry data), including base salary and annual bonuses “Work your ...

Remote Cloud Engineer: OpenStack, Kubernetes & Linux

Location
Greater London, England, United Kingdom
over private and public cloud solutions. You will work hands-on across the Linux stack, use Python to develop Kubernetes operators, and contribute to open source infrastructure-as-code. The role includes travel up to 25% and remote-first work arrangements. Ideal candidates have a CS degree ...

Sr Staff Software Engineer, MarTech

Hiring Organisation
eBay
Location
Amsterdam, Noord-Holland, Netherlands
Employment Type
Permanent
Salary
EUR Annual
evaluate tradeoffs (scalability, availability, latency, cost) Experience with AI-assisted development practices; exposure to GraphQL, federated APIs, LLM-powered features, agentic workflows, or open-source contributions is a plus cross-functional collaboration mentoring problem-solving Java (17+) Spring Boot Marko ...

Senior Software Engineer

Hiring Organisation
Anson Mccade
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
lifecycle, from requirements analysis and architecture through to implementation, deployment, training and support. Develop full stack applications using Java, TypeScript, JavaScript and React. Utilise open-source libraries, frameworks and components to deliver modern software capabilities. Build and maintain continuous integration pipelines using tools such as GitLab to monitor ...