Founding Engineer
Lightsage
Company Description Lightsage (formerly Sapient) builds infrastructure for the emerging agent economy, helping organizations track, benchmark, and improve how coding agents discover and use their APIs, CLIs, and MCPs. The company enables enterprises and high‑growth startups to become the default tools recommended by agents, focusing on agent experience, discoverability, and performance. Lightsage is behind DevToolArena.com, a public benchmark platform that ranks developer tools across authentication, inference, voice, and more using systems like Claude Code and Codex. Role Description As a Founding Engineer at Lightsage, you will design, build, and scale core infrastructure and products that power agent‑led growth for developer tools and platforms. You will work closely with the founders to define technical architecture, implement new features, and create benchmarks and analytics that measure how agents interact with APIs, CLIs, and MCPs. Your day‑to‑day will include writing high‑quality production code, building data pipelines and dashboards, integrating with third‑party tools, and experimenting with agent frameworks and AI coding systems. You will collaborate directly with customers to understand their needs, refine product requirements, and ship end‑to‑end solutions from prototype to production. Requirements Able to take a loosely defined customer or product problem and drive it to a working shipped solution Prior founder or early‑stage startup operator experience is a plus Strong written communication and ability to explain technical decisions clearly This is a full‑time, on‑site role based in San Francisco, CA, with significant ownership, autonomy, and impact on the company’s technical direction. #J-18808-Ljbffr Lightsage
Vacancy posted 4 days ago
Similar jobs that could be interesting for youBased on the Founding Engineer in San Francisco, CA vacancy
- ...Founding Robotics Software Engineer Location: San Francisco (preferred) / US Type: Full-time · Founding Team About Bracket Bot Bracket Bot is building low-cost, general-purpose robots that developers can program and deploy in days. We’re transforming...SuggestedFull time
Bracket Bot Inc.
San Francisco, CA22 hours ago - Hivemind is building a social AI that talks to many people at once, with one-on-one conversations. We are seeking founding members of technical staff to co-own the foundation from day zero and shape the team as it grows. You will define technical standards, build core...Suggested
- ...Visa sponsorship: None available. About the Role: This is a founding hardware role, and the person who fills it owns the physical... ...hire joins the technical side alongside the CTO and lead software engineer as one of the first ten employees. The role requires someone...SuggestedFull timeVisa sponsorship
Thomas Talent Network
San Francisco, CA18 days ago - ...science and manufacturing that isn't possible on Earth, and we're doing it without humans in the loop. We're looking for a Founding Mechanical Engineer to own the design and development of our robotic arm from concept through flight-ready hardware. This is a high-...SuggestedPermanent employment
- ...role offers greater autonomy and closer collaboration with the founding team than other positions. Required Qualifications Strong... ...enrolled or finished MS or PhD in Operations Research, Industrial Engineering, Applied Mathematics, or a related quantitative field Domain...SuggestedFull timeLocal areaRelocation
$250k - $380k
Base pay range $250-380k Needl Owner - Helping tech startups scale Founding Hardware Engineer (Stealth Robotics Startup) About Us We’re a tiny, fast-moving team building autonomous systems for heavy industrial machines. We retrofit existing equipment with a plug-and-...Full timeLive outRemote workVisa sponsorshipRelocation package- ...scalable internal platform on the Business Technologies team. As a founding member, you will define how infrastructure is built, automated... ...rather than just respond to tickets. The role emphasizes an engineering-first approach: workflow automation, system integrations, and...
- ...from across IT and security. Several design partners today and a founding team of three. Full-Time, In-person, San Francisco, CA.... ...About the Role: This is a backend- and systems-heavy founding engineering role where "full-stack" means owning the product and system end...Full timeH1bVisa sponsorship
Thomas Talent Network
San Francisco, CA13 days ago $500 per month
...DESCRIPTIONThis company handles millions of calls per month and needs an engineer who has worked at that scale before and knows how to build... ...sub-100 milliseconds.You will work on-site directly with the founding team, contributing across architecture, infrastructure, and...H1b- Oho Group is seeking a Founding Mechanical Engineer in San Francisco to lead the design, build, and testing of complex hardware systems. This position requires a Bachelor's degree in a related field and hands-on experience with hardware development, with responsibilities...
$150k - $240k
10x Science, based in San Francisco, is looking for a founding engineer to contribute to a high-performance computing platform for AI-powered drug discovery. You'll join a small team and work directly with the founders, taking on significant responsibilities from day one...$130k - $200k
Join us to apply for the Founding Engineer (Systems + ML) role at Partcl . Get AI-powered advice on this job and more exclusive features. This range is provided by Partcl. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more...Full time- ...a YC S25-backed startup, is building a replayable environment engine over real enterprise history and deploying it within modern workflows... ...you can be proud of for decades. Join us as we scale from founding team to deployment across enterprises. #J-18808-Ljbffr Ambral...
- A cutting-edge AI startup in San Francisco is seeking a Founding Engineer with 4+ years of backend experience. You will design and scale backend systems, mentor junior engineers, and tackle technical challenges in the food-tech space. Ideal candidates will have deep expertise...
- Physical AI in San Francisco is building models and tooling to accelerate hardware design. The founding engineering team will own core architecture and productionize physics-informed models on real boards. You will shape the tech stack, integrate with engineers' tools,...Visa sponsorship
- A pioneering robotics company is seeking a Founding Mechanical Engineer in San Francisco, CA. You will design and develop robotic arms for microgravity environments, leading all aspects from concept to flight-ready hardware. Essential qualifications include a Bachelor'...
- A technology company in San Francisco is seeking a Founding Fullstack Engineer to build scalable systems that automate complex decisions in manufacturing. Ideal candidates will have experience with data-driven agents, strong product sense, and the ability to ship production...Relocation
- Trajectory, based in San Francisco, is seeking a Founding Generalist Engineer to craft the product experience for continual learning. The role involves owning the SDK and API surfaces while working directly with founders and industry-leading partners. Ideal candidates...
- Truss is a regulated fintech company seeking the founding head of risk to design and lead the risk program. The role requires building production risk systems, rules engines, and decisioning platforms to catch fraud, abuse, and loss in production. You will own end-to-end...
$250k - $380k
A stealth robotics startup in San Francisco seeks a Founding Hardware Engineer to design and build autonomy systems for heavy industrial machines. Ideal candidates will have a proven ability to prototype hardware from scratch and thrive in fast-paced environments. Key...- Gradient Robotics in San Francisco, CA is seeking a Founding Software Engineer to own end-to-end data flow from AI models to actuators and keep real-time pipelines running at single-digit latency. You’ll work near hardware, from kernel and firmware up through perception...
- ...You'll be the founding GTM hire at TraceRoot — turning early developer love into a repeatable growth engine. This is not a marketing-ops job; it's a build-and-own PLG role. You'll build the machine behind our growth: the data pipeline, the outbound engine, and the source...Live in3 days per week
TraceRoot.AI (YC S25)
San Francisco, CA10 hours ago $100k - $200k
...innovation. Learn more at voicecursor.ai. Role Description This is a full-time, on-site role based in the San Francisco Bay Area. As a Founding Engineer, you will play a pivotal role in shaping the technical foundation of Voice Cursor. Your day-to-day responsibilities will...Full time10 hours per weekFlexible hoursVoice Cursor
San Francisco, CA2 days ago- ...tl;dr: This is a 1 of 1 role. We're looking for a founding engineer to work alongside a Thiel Fellow founder as employee #1 - with 5X more equity than most "founding engineers". About Empathic “…but I tell you all today, I would rather die a man than live for all eternity...InternshipWork at office
Empathic
San Francisco, CA1 day ago - ...As a founding engineer and first full-time hire, you’ll be a cornerstone in building out the EffiGov platform and team. You’ll ship features, design scalable architectures, implement cutting edge tools and research, all in service of delivering for our early customers...Full timeTemporary workLocal area
EffiGov
San Francisco, CA4 days ago $350k
...conversations consistent and personalized across all channels. Reverse engineering legacy healthcare systems that don’t have public APIs to... ...who desperately need them. We’re looking for exceptional founding engineers to help us realize this ambition. If you’re an engineer...Contract workNight shiftAlleviate Health
San Francisco, CA2 days ago$160k - $200k
..., well-backed by top-tier investors, and moving quickly toward its next stage of growth. Founded 2024 · ~12 people · Industry: B2B SaaS, AI, Fintech The Role As a Founding Engineer, you would join a small, product-minded engineering team and own core features end-to-end...Full timeH1bVisa sponsorshipDavid Joseph & Company
San Francisco, CA4 days ago$250k
...transferred to us in real time. The company is bootstrapped and founded by a former startup and venture capital attorney. Sixteen... ...percent reply rate. About the Role This is the company’s first engineering hire, reporting directly to the Founder, who is currently the...Full timeCasual workWork at officeImmediate startRemote workRelocationErsilia
San Francisco, CA22 hours ago- ...to automate the repetitive work currently handled manually across emails, spreadsheets and legacy systems. They are hiring a Founding Engineer to work directly with the founders and customers, understand how these businesses operate and build the product from first conversation...
HartleyCo
San Francisco, CA4 days ago - ...developer tools across authentication, inference, voice, and more using systems like Claude Code and Codex. Role Description As a Founding Engineer at Lightsage, you will design, build, and scale core infrastructure and products that power agent‑led growth for developer...Full time
Lightsage
San Francisco, CA3 days ago
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Engineer. Be the first to apply!
