First Engineer — Build AI Platform & Open‑Source Tools
TraceRoot.AI (YC S25)
A cutting-edge technology startup in San Francisco is seeking a first engineer to collaborate with founders in building innovative AI products. This role requires strong full-stack development skills, particularly with React, TypeScript, and Node.js. Candidates should have a builder mindset and be able to work quickly within a startup environment. You will engage with users, ship new features rapidly, and maintain open-source projects as part of a dynamic team culture. #J-18808-Ljbffr TraceRoot.AI (YC S25)
- Stealth Startup is looking for a passionate Open Source Developer based in San Francisco, California, who is eager... ...with cutting-edge technologies like LLMs and AI tooling. This role is suited for early‑career engineers with a builder mindset. You will collaborate with...Suggested
- The Sr. Quality Engineer will report to the Technology... ...quality. At First Dollar, we believe... ...empowering engineers to build a smarter health benefits platform - one where human... ..., not replaced, by AI tools. We seek engineers... ...scripts using open-source tools Identify, record...PlatformRemote jobNight shift
- ...to join their San Francisco team, focusing on building and optimizing features for an AI runtime and SaaS platform. The role requires over 5 years of experience in... ...leading collaborative teams. You will contribute to open-source initiatives and help shape the future of...Platform
- About the company Braintrust is the AI observability platform. By connecting evals and... ...AI behaves in production and the tools to improve it. Teams at Notion, Stripe... ...release. About the Role We’re hiring engineers to build the open-source libraries that customers use to...PlatformFlexible hours
- ...for a passionate Open Source Developer who is excited about building in public, contributing... ...such as LLMs, AI tooling, and scalable backend... ...for early-career engineers who love... ...Kubernetes, or cloud platforms Experience working... ...Collaborative and engineering-first culture #J-18808-...Platform
- Together AI is seeking a Research Engineer for the Model Shaping team to build a platform that lets users tailor open-source models with their data. You will work across training and inference... ...teams to advance open-source AI tooling, supporting developers worldwide in...PlatformWorldwide
- Prime Intellect is building a platform that unifies AI workloads, compute, environments... ...spans platform software engineering and infrastructure, focusing... ...services, real-time tooling, and scalable training infrastructure... ...and security as we open-source and #J-18808-Ljbffr...Platform
- A fast-growing, pre-seed AI startup in the talent and recruiting... ...is looking for a Founding Engineer Intern to join their founding... ...ship features daily and help build a fully agentic system that automates... ...full-stack development and open-source contributions. Location Based...PlatformInternshipVisa sponsorship
- ...Developer Relations Engineer role at Canonical... ...ago Be among the first 25 applicants... ...millions of developers, building for the cloud,... .... We aim to make open source easier and more... ...the way that tools can be adapted to... ...projects and the platform for AI, IoT and the cloud...PlatformFull timeFreelanceLocal areaRemote workWorldwide
- ...framework and enterprise platform for building and orchestrating multi-agent AI systems. The open-source framework is a lean,... ...build on. This is engineering done in public. Your... ...experience as a first-class product. What... ..., task execution, tools, memory, MCP, A2A, and...Platform
$135.2k - $306.4k
...Oracle hardware platform development engineering is seeking a highly... ...Cloud AI platforms. You will... ...has delivered the first and second generation... ...and is building out the next generation... ...and approved open‑source AI platform qualification... ...and test tools. Expand system...PlatformTemporary workWork experience placementRemote workFlexible hours$165k - $242k
...Essential Cloud for AI™. Built for... ...CoreWeave delivers a platform of technology, tools, and teams that... ...innovators to build and scale AI... ...building the best open-source environment for... ...Python notebook from first principles. It... ...challenging engineering problems, and are...PlatformPermanent employmentTemporary workCasual workWork at officeWorldwideFlexible hours$190k - $230k
...vertically integrated AI infrastructure... ...a team that is building the future,... ...with an energy‑first approach that... ...Staff Systems Engineer to play a key role... ...integration platforms—building scalable... ..., and tooling to support a Citizen... ...Contributions to open‑source AI projects or...PlatformTemporary work- ...is to make custom AI affordable for every... ...base. Now, we are building something we wish we had before: a platform that makes... ...are doing, see our first tech blog. Role Overview... ...deploying open‑source LLMs (Qwen, DeepSeek... ...to AI/ML systems tooling (compilers, kernels...PlatformFull timeWork at office
- ...healthcare. Our AI-powered platform was purpose‑built... ...technologists, and engineers working together... ...You will help us build load testing and... ...observability and profiling tools to identify... ...conferences, open source, and research as... ...we pioneer new AI‑first cloud‑native‑first...Platform
$215k - $250k
...Federato is the only AI-native platform that spans the full... ...for a Software Engineer, AI Systems to help build the backend architecture... ...orchestration and tool integration to... ...Contributions to open-source AI or data infrastructure... ...our users, take a first-principles approach...Platform$200k - $275k
Build a Safer World. TRM Labs provides AI-powered intelligence solutions... ...disrupt crime. TRM's platforms enable... ...secure. The AI Engineering Team is chartered... ...and operational tooling that allow AI... ...space — including open-source stacks, vector... ...put customers first and move with speed...PlatformRemote workWorldwide- ...world's most dynamic AI companies, like Cursor... ...seamless developer tooling, we enable companies... ...Conviction. Join us and help build the platform engineers turn to to ship AI... ..., making RDMA a first-class building block... ...leverage the best of the open-source ecosystem, you won't...PlatformFlexible hours
$210.8k - $248k
...healthcare. Our AI‑powered platform is purpose‑built... ...technologists, and engineers working together... ...focused. You will help build load testing and... ...and profiling tools to identify... ...including conferences, open source, and research as... ...we pioneer new AI‑first, cloud‑native,...PlatformHourly payFull timeFlexible hours$224k - $336k
.../ Principal Engineer, Technical Mitigations... ...USA We’re building a talent‑... ...high‑agency AI safety team... ...narrow scientific tools and lab‑based... ...for open problems in post... ...the world’s first scientific superintelligence... ...platform and autonomous... ...resumes from any source other than...Platform- ...established, designing, building, and running... ..., having an open‑source first and result‑oriented... ...to scale out our platform. On a typical day... ...that enables our engineers to accomplish their... ...and leverage AI/ML techniques for... ...Helm and GitOps tools like ArgoCD. Infrastructure...PlatformFor contractors
$175k - $250k
...ago Be among the first 25 applicants... ...Infrastructure Engineer Location: San Francisco... ...a pioneering open source technology... ...generative AI. They are the team... ...flexibility. Their platform allows users to... ...components, build complex... ...empowerment, their tools help users experiment...PlatformFull timeRemote workRelocationRelocation package- ...we compute. Our platform integrates... ...neurons with modern AI systems,... ...efficient. We are the first to deploy... ...computational AI engineers and neurobiologists... .... You will build the applications... ...integrations and GTM tools Create and... ...and modifying open‑source code, writing applications...PlatformImmediate start
$156k - $215k
Staff Software Engineer, AI & Automation Staff... ...ago Be among the first 25 applicants Direct... ...is the only CX platform that puts the customer... ...questions, we’re building AI features that... ...AI, evaluate new tools and models, and... ..., and LangSmith Open-source work, public...PlatformFull timeLocal areaRemote workRelocationHome office- Founding Engineer | Build AI Products That Solve Mission-Critical Problems A client of Venchr is... ...full-stack development across the core platform, building scalable features, AI-driven... ..., AWS, Kubernetes, and modern LLM tooling. This role goes beyond writing code, giving...PlatformFull timeWork at office
- ...builders, and stewards of the OpenClaw ecosystem. This is not a traditional software engineering role; you will operate as both an open-source maintainer and product engineer, designing, building, maintaining, and evolving core components while supporting a broad contributor...PlatformFull time
- Together AI in San Francisco is seeking a Research Engineer to help build a platform that lets users customize open-source models, bridging post-training and production inference. You will contribute across Fine-Tuning, RL, and Evaluation services and collaborate with product...PlatformFull timeWorldwide
$160k - $220k
...Identity, from AI to Human Identity... ...secures AI by building the trusted,... ...Reliability Engineer (DBRE) Experience... ...with SRE, Platform, and Engineering... ...Automation & Tooling * Develop automation... ...to open-source PostgreSQL ecosystem... ...office during the first week of employment...PlatformPermanent employmentFull timeWork at officeLocal areaWorldwideFlexible hours$130.05k - $175.95k
...Onyx Research Data Platform organization... ...leadership, data engineering, infrastructure ,and... ...knowledge platforms, and AI/ML and analysis... ...all geared toward: Building a next-generation... ...in end-to-end user tools through the use of... ...and aware of the open-source communities that revolve...PlatformLocal area$167.2k - $209k
...in their drive to build the simplest scalable... ...is expanding its AI Infrastructure... ...seeking a Senior Engineer 2 to join our AI Inference... ...observability tools and defining SLOs... ...to ensure superior platform health. What You’... ...to DigitalOcean. Open Source Mindset:...PlatformLocal areaRemote workWorldwideFlexible hours
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