Open Source Developer — AI Tooling & LLMs for Builders
Stealth Startup
Stealth Startup in San Francisco is seeking a passionate Open Source Developer excited about contributing to developer ecosystems and working with cutting-edge technologies. This role is perfect for early-career engineers who enjoy experimenting and learning fast. Responsibilities include maintaining open-source projects, collaborating on backend systems, and engaging with the community. The ideal candidate has Python proficiency and a builder mindset, along with a desire to work on impactful open-source projects. #J-18808-Ljbffr Stealth Startup
- We are looking for a passionate Open Source Developer who is excited about building in public, contributing... ...on cutting-edge technologies such as LLMs, AI tooling, and scalable backend systems. This... ...Good problem-solving skills and a builder mindset Nice to Have Contributions...Suggested
- ...Braintrust AI Observability Platform Engineer... ...workflow, Braintrust gives builders the visibility to understand... ...in production and the tools to improve it. Teams... ...engineers to build the open-source libraries that... ...who are passionate about developer experience, API craftsmanship...SuggestedFlexible hours
- Factory is seeking a Developer Relations Lead in San Francisco, California to enhance engagement... ...events, building relationships in the open-source ecosystem, and crafting technical... ...communication skills, with familiarity in AI and software development trends. #J-1880...Suggested
$190k - $280k
...take end-to-end ownership of coding projects. You'll leverage AI tools to enhance productivity and work directly with the Customer Operations... ...00 to $280,000, depending on various factors. Join a team that values inclusivity and open-source contributions. #J-18808-Ljbffr SentrySuggested$165k - $242k
...CoreWeave is The Essential Cloud for AI™. Built for pioneers by... ...a platform of technology, tools, and teams that enables innovators... ...to make the world's best open-source programming environment for working... .... If you're passionate about developer tools, thrive in ambiguity,...SuggestedPermanent employmentTemporary workCasual workWork at officeRemote workFlexible hours- ...data. While most AI companies focus... ...AI Engineer (LLMs & Agents) to architect... ...a high-leverage builder who can move... ...persistent memory, and tool integrations to... ...data sources Optimize context... ...Evaluate & Iterate Develop internal benchmarking... ...Fine‑tuned open‑weight models (e...
- ...actionable data. While most AI companies focus on... ...for a high-leverage builder who can move fluidly... ...that leverage LLMs, persistent memory, and tool-integration to navigate... ...from fragmented data sources Evaluate & Iterate:... ...planning, Fine-tuned Open-Weight Models (Llama...
- Software Engineer, Internal Tools Metriport is an open-source data intelligence platform... ...expose PHI. You follow the AI tooling space closely and... ...break quietly. Improving Developer Experience and Onboarding:... ...advantage. Experience using LLMs or AI agents to automate workflows...Work at officeLocal areaRemote workWork from homeRelocationFlexible hours
- ...Meet Eloquent AI At Eloquent AI, we're building... ...across fragmented tools with human-level precision... ...'re passionate about LLMs, conversational AI, and... ...conversations. Design & develop next-gen multimodal LLM... ...You've contributed to open-source NLP projects. You've...
- ...ubiquitous. We provide the agent engineering platform and open source frameworks developers need to ship reliable agents fast. Our open source frameworks... ...is trusted by millions of developers worldwide and powers AI teams at companies like Replit, Clay, Cloudflare, Harvey,...WorldwideFlexible hours
- ..., Inc. is seeking a DevRel Engineer to build and engage with our developer community in San Francisco. The role involves creating content, hosting events, and fostering relationships to drive open source initiatives forward. Interested candidates should have 1-2 years...3 days per week
$190k - $280k
...take ownership of code from write to ship. You will work closely with the Customer Operations team and contribute to a recognized open-source project. The ideal candidate has a minimum of 5 years in software development, strong communication skills, and experience with...- ...train and deploy AI models that opens this capability to... ...re looking for a Developer Relations Lead to... ..., engineers, and builders. This isn't a... ...Native: You use AI tools to maximize your... ...using agents and LLMs to 10x your work,... ...and engineers to source content, but you...Full timeLive inRemote workFlexible hours
- ...Fractional AI How do you turn a decades... ...Silicon Valley builders who care deeply about... ...in our first Developer Relations Engineer... ...context Drive open source contributions and... ...enterprise value with LLMs, and building our... ...with the latest tools and share what we...
- ...Developer Relations Lead We're hiring a Developer... ...developers and AI coding agents have... ...assets, they're tools that help... ...communities (AI agent builders, LLM application developers... ...with LLMs, building agentic... ...conference talks, or open-source contributions. Developers...Work at officeShift work
$160k - $190k
...Vanilla is the first AI-powered estate... ...you’ll join curious builders and problem-... ...vision and leverage open source technologies and cloud... .... You can build tooling to support model training... ...source tools to develop new model training... ...RAG for tuning LLMs. Experience with...Full timeWork experience placementWork at officeLocal areaRemote workHome officeFlexible hours- ...Value We hire successful builders with founder-like energy who want... ...done" end-to-end. You use AI to work smarter and solve problems... ...working on internal AI tooling, you will be responsible for helping... ...into with respect to specific open position(s). Search firms/...Worldwide
- ...generation of Gen AI-driven code reviewers... ...code review and developer workflows. Working... ...for developer tools Collaborate with... ...Familiarity with LLMs or integrating AI... ...Contributions to open source or technical communities... ...Persistent Builders: We embrace hard...Remote workFlexible hours
$350k
...the knowledge and tools to make AI work for their unique... ..., engineers, and builders who’ve created... ...and Character.ai, open-weights models like... ...well as popular open source projects like... ...needed. Improve developer experience for local... ...tooling or products for LLMs or other systems...Local areaImmediate startVisa sponsorshipWork visaRelocation package- ...chat-a workspace where AI agents and humans collaborate... ...5, Claude, Gemini, and open-source alternatives) and... ...large language models (LLMs) and retrieval-augmented... .... A self-starter, a builder, a doer. You know how... ...evaluation techniques, tooling (e.g., Braintrust, Promptfoo...Local areaImmediate startFlexible hours
- ...Engineer excited about shaping the future of developer tooling. At Coder, you will have the... ...environments Create and improve upon popular open source projects that integrate with VS Code,... ...enterprise user base Work with cutting-edge AI technologies to create seamless,...Local areaRemote work
- ...gap using technology and AI. We empower personal... ...Software Engineer on our Builders, you'll be the person... ...Contribute to the team's tooling and processes: runbooks... ...is different - you'll develop a rare combination of speed... .... We only post open roles on our career page...Full timeTemporary workLocal areaHome officeFlexible hours
- Valid8 Financial, Inc. is seeking a skilled developer to join their San Francisco team,... ...building and optimizing features for an AI runtime and SaaS platform. The role requires... ...teams. You will contribute to open-source initiatives and help shape the future of...
- ...transformation in the age of LLMs and generative AI. In just two years, we've... ...Microsoft, and IBM. Our open-source toolkit has been downloaded... ...We're not just building tools, we're building the backbone... ...performance, and simplicity. Be a Builder and a Multiplier Write...Flexible hours
- ...focused on identity solutions is seeking a Staff Software Engineer to join the AI DevEx team. This role involves building developer tooling, creating demo applications, and contributing to open source projects. The ideal candidate is proficient in JavaScript, TypeScript,...
- ...development of agentic AI systems that deliver personalized... ...A Strategic Builder: You don't just write... ...depth in working with LLMs (prompt engineering, RAG... ...stakeholders. Contributions to open-source AI or software... ...gender-affirming care, tools for family and fertility...Local areaImmediate start
- ...build a new generation of transpilation tools enabled by AI and modern verification techniques — bridging... ...in one language to another. We are open to two distinct backgrounds for this role... ...AI agentic system — orchestrating LLMs with tool use, state machines, retrieval...Remote workRelocation packageFlexible hours
- ...justice gap using technology and AI. We empower personal injury... ...As a Staff Engineer on our Builders, you'll be the technical anchor... ...handles escalations at scale: the tooling, the patterns, the standards.... ...situations. We only post open roles on our career page (evenuplaw...Permanent employmentFull timeTemporary workLocal areaHome officeFlexible hours
- A leading blockchain company is looking for an experienced TypeScript engineer to develop essential open-source tools and libraries for the ZetaChain platform. The ideal candidate will focus on creating a user-friendly TypeScript client and enhancing the developer experience...Remote work
- ...FriendliAI is hiring a Python Engineer to build developer tools for our users and internal engineers.... ...A front-row seat to the generative AI infrastructure revolution... ...developers instant access to over 500,000 open-source models. We are a small, fast-moving...Local areaWorldwideFlexible hours
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