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Open nowPosted 502 days ago

Senior Full Stack Engineer - Founding Team

TechOnTech2 open roles

Pay
$160,000 – $240,000 a yearly
Where
San Francisco, CA
Work mode
On site
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Your applicationOpen nowSenior Full Stack Engineer - Founding TeamTechOnTech · San Francisco, CA

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on TechOnTech's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

11.8% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.4%3 days
  3. 11.8%7 days
  4. 18.6%14 days
  5. 35.6%30 days
  6. 45.1%60 days
This job: posted 502 days ago

The posting

About US

TechOnTech LLC is a recruitment company made by engineers that wants to help start ups and small to mid range companies find the right technical talent. Our firsthand expertise empowers us to excel in finding, filtering, and conducting insightful interviews with tech talent, ensuring we connect the right candidate to the right company. We are looking for senior engineers who wants to join a fast growing start up as part of their founding engineering team.

Why Join our client?

  • Rocket-ship growth. We’ve grown 5× in the last six months—and accelerating.
  • Extreme ownership. You’ll work directly with enterprise users and ship end-to-end products that save them hours every week.
  • Bleeding-edge problems, real impact. Tackle tough AI and product challenges whose wins show up immediately in customer workflows.
  • In-person collaboration. Join a lean, staff-level team (ex-Affirm, Uber, DoorDash, McKinsey) working side-by-side in San Francisco; we believe the best ideas are fostered in an in-person environment.
  • Top-of-market rewards. Competitive base salary plus meaningful founding-team equity.

Why join as a Senior Full Stack Engineer?

  • Own the product surface. Ship end-to-end features—frontend, backend, and LLM orchestration—that automate millions of dollars of work.
  • Close Collaboration with Customers. Work closely with our customers for designing, shaping and shipping the latest products into their hands.
  • Hyper-growth, tiny team. Enjoy massive autonomy and zero bureaucracy to define the product surface while we scale from < 10 people to the next phase.
  • Cutting-edge stack. Python, TypeScript, React/Next.js, Temporal, Postgres, AWS, plus closed- & open-source LLMs.
  • Founder-level impact. Shape product strategy, culture, and engineering standards from the ground up.

What you’ll do

  • Build full-stack products & features that blend UX with AI agents for maximum customer impact.
  • Prototype & iterate quickly, turning customer pain points into live solutions in days, not quarters.
  • Scale the platform—security, observability, and performance — for enterprise scale.
  • Collaborate with customers & SMEs to craft new and delightful workflows for complex insurance tasks.
  • Raise the technical bar, mentoring peers & juniors, and refining best practices for a high-velocity team.

About you

  • 3–5 yrs building production software across the stack; strong in TypeScript + React and/or Python.
  • Proven at shipping 0→1 products in fast-moving environments (startup or internal incubation).
  • Product-obsessed. You think in user journeys, sweat UX details, and measure success in customer adoption.
  • Bias to action. Comfort making trade-offs, shipping fast, and learning from real-world usage.
  • Nice-to-haves: experience with LLM apps, cloud infra (AWS), or fintech/insurtech domains.

What we offer

  • Competitive salary ($160k-$240k) + equity on founder-friendly terms.
  • Full health, dental & vision.
  • High-ownership, high-trust culture with lightning-fast executors.
  • Regular team off-sites, dinners, and an office stocked for builders.
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One press. We do the rest.

  1. A CV for this posting

    Written against TechOnTech's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on TechOnTech's form

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    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    TechOnTech's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

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