Founding Engineer
Lightsage
Company Description Lightsage builds infrastructure for the emerging agent economy, helping organizations track, benchmark, and improve how coding agents discover and use their APIs, CLIs, and MCP integrations. The platform is used by enterprises and high-growth startups to become the default tools recommended by software agents. Lightsage focuses on agent experience and measurable impact on developer and product adoption, with more information available at lightsage.com. The team also created DevToolArena.com, a public benchmark that ranks developer tools across areas like authentication, inference, and voice using Claude Code and Codex. Joining Lightsage offers the opportunity to shape how agent-led growth and developer tooling evolve in a rapidly changing ecosystem. 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 Experience working with Next.js, FastAPI, Supabase, Microsoft Azure 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
- ...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, CA25 days ago - ...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...SuggestedFull timeH1bVisa sponsorship
Thomas Talent Network
San Francisco, CA20 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...SuggestedH1b$180k
...Culture Talent. We're excited to help connect talented professionals with this exceptional team! The Role We're hiring a Founding Engineer to join an early-stage company building AI-powered software and data infrastructure for healthcare organizations operating in...SuggestedWork experience placementPeople Culture Talent
San Francisco, CA4 days ago$185k - $215k
...gap between referral and care. The result is better patient experiences and health outcomes. Our founding team pairs deep experience investing in health tech with engineering expertise from Meta and we just raised a $2.5M pre-seed led by GreyMatter. About the Role...SuggestedWork at officeFlexible hoursGrey Matter
San Francisco, CA2 days ago- ...Join The Founding Engineering Team At Adam We're building the founding engineering team at Adam. At Adam, we're tackling a frontier problem: building a new way to interface with CAD via AI. This demands creativity, deep technical ability, and novel thinking....
adam.ai
San Francisco, CA11 hours ago $7.5k
...Founding GTM Engineer (Series A Fintech / EdTech) Location and Commitment San Francisco, CA or Phoenix, AZ (In-Person, Full Time) | Seniority: Founding / Senior IC | Equity: Meaningful Founding Stake The Mission Architecting the Financial Rails for the $900B School Choice...Full timeLive inWork at officeWork from homeRelocationVisa sponsorshipRelocation packageEQL Tech (frontier talent)
San Francisco, CA4 days ago- ...Founding Full-Stack Engineer Opportunity Hi, my name is Gabriel and I'm the founder of Y/n. Y/n is an app where you can create, share, and play interactive stories. Today, 100K+ teenagers spend 3+ hours a day in the app playing characters in text stories of their...Relocation
Can of Soup
San Francisco, CA3 days ago $150k - $300k
...optimize cash, debt, budgeting, expenses, investing, and taxes. Founded in 2025 by a former senior financial-services leader at a... ...native financial operating system. We are hiring a Founding Engineer to become the company's first technical hire and build the product...Full timeContract workH1bRemote workVisa sponsorshipRaydar Inc
San Francisco, CA5 days ago- ...Founding Engineer (Full Stack) Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier) Backed by 8VC, we're building a world-class team to tackle one of the industry's most critical infrastructure problems...Full time
Fabrion
San Francisco, CA1 day ago $250k
...transferred to us in real time. The company is bootstrapped and founded by a former startup and venture capital attorney. Sixteen... ...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 workRelocationProduct Pulse
San Francisco, CA14 hours ago- ...Weave At Weave, we’re building the best software for the best engineering teams to move faster, and we want to hire exceptional sales talent... ...runs engineering at Weave, and before that worked as the founding engineer at Causal. Responsibilities Build pipeline: do whatever...Flexible hours
Weave, Inc.
San Francisco, CA4 days ago $160k - $210k
...About the job Founding Engineer Founding Engineer Global Placement Firm is conducting a confidential search for Founding Engineers to join a small, high-growth healthcare technology company in San Francisco focused on transforming how speech, occupational,...Full timePrivate practiceH1bWork at officeRelocationVisa sponsorshipGlobal Placement Firm
San Francisco, CA2 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...Contract workNight shiftAlleviate Health Inc
San Francisco, CA2 days ago$130k - $200k
...Founding Engineer – Full Stack (AI x Developer Tools) Location: San Francisco, CA (Hybrid – 4 days/week in person) Compensation: $130,000 – $200,000 base Equity: 0.10% – 1.75% Work Authorization: Open to visa sponsorship in exceptional cases Type: Full-time Start Date...Full timeImmediate startVisa sponsorshipWork visaAmadeus Search
San Francisco, CA2 days ago- ...universities and turned down millions of dollars of cash/equity to build real products for billions of humans at Ghost. Apply for the founding eng role if you: ~ Use agents to write ~90% of your code ~ Have done exceptional things in the past ~ Have the...
GHOST
San Francisco, CA3 days ago $250k - $400k
...Founding Engineer Type: Full-time Compensation: $250-400k base plus generous equity Location: On-site in SF, hybrid, or remote About the Role We're looking for engineers to help us build the infrastructure to clone and gamify the internet. We will cover...Full timeRemote workMatrices Inc
San Francisco, CA11 hours ago$150k - $250k
...Agentmail Engineer Opportunity Location: San Francisco, CA Type: Full-time, on-site We are seeing a surge in market demand as... ...for your email, it's email for your AI. We're looking for a founding engineer with strong backend and infra instincts to help build...Full timeAgentmail (yc s25)
San Francisco, CA3 days ago- ...Nasdaq & Wing VC Top-Ranked Startup, Lean AI Leaderboard Backed by Y Combinator ABOUT THE ROLE We are hiring a Founding Sales Engineer to help enterprise customers successfully adopt Voice AI from the first technical conversation through production...H1b
Visa Hunt
San Francisco, CA3 days ago - ...startup, revolutionizing the computing landscape, is looking to hire a Principal Product and Application Security Engineer to join their team as a founding engineer. This startup has hit a $1B valuation, closed their Series A funding, and has been around for 4 years. They...Full time
- ...complex in existence, and it hasn't changed much in decades. Engineers spend enormous amounts of time on setup, scripting, debugging... ...citations behind it and hold multiple patents. We're now hiring the founding engineers on our team * not the fortieth * and you'd be...Full timeImmediate startVisa sponsorship
$180k - $230k
...(CTO) and Chirag (CEO) are the team today. You'd be the second engineer: real-time voice, generative UI that redraws itself based on who... ...ownership without being asked. Comp Base: $180-230K Equity: Founding-caliber Location: In-person, San Francisco Process 4 rounds:...Live inWork at office- 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 by...Full timeTemporary workLocal area
$175k - $225k
About the Role Join a fast-moving, early-stage consumer AI startup as a Founding Engineer — a rare, high-impact position working directly alongside the founder. This is a true 1-of-1 opportunity to shape both the product and engineering culture from the ground up. The company...Remote workVisa sponsorship- 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
- ...building AI that helps teams uncover their best automation opportunities and build those automations. The role We are hiring a Founding Engineer to be the tip of the spear for turning Worktrace AI’s ambitious product vision into reality. In this role, you will be a key...Visa sponsorship
- About the Role We're looking for founding Machine Learning Engineers (MLEs) to own and improve our core action models end-to-end— the intelligence that powers Composite's proactive automation platform. You'll work at the intersection of LLM inference, browser understanding...
- About Loop Loop AI is a San Francisco-based tech company founded in 2022. We provide a Delivery Intelligence Platform for data-driven... ...first restaurants. About The Role We are looking for a Founding Engineer with 4+ years of backend engineering experience to join our...Temporary work
$100k - $200k
.... 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 include...Full time10 hours per weekFlexible hours- About the Role You'll be a Founding Engineer at Solderable, building the core AI-assisted PCB design tooling and EDA automation platform from the ground up. This is a software-first role with deep hardware roots—you'll own everything from the design tools themselves to...
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