Senior Full-Stack Engineer (Backend-Leaning) | San Francisco, USA

  • Berlin, Germany
  • Full-Time
  • On-Site
  • 200,000-240,000 USD / Year
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Job Description:
  • On-site | San Francisco, USA
  • $200,000 – $240,000 Base + Equity
  • AI Product | High-Agency Startup | 0-to-1 product build

Snapshot

Join a high-agency, AI-native startup (12–14 team members, ex-founders & CTOs) building what could become the Claude for complex jobs — a personal AI chief of staff designed for knowledge workers.

This is a senior, product-first engineering role with end-to-end ownership, where engineers don't just code — they shape the product, interact with users, and drive outcomes.

If you're looking for structured environments, tickets, or low ownership — this is not the role.

What You'll Do

  • Own product features end-to-end (no ticket-taking culture)

  • Build backend-heavy systems with AI model integrations & agent workflows

  • Contribute to infrastructure and DevOps where needed

  • Implement lightweight frontend components when required

  • Work directly with users and translate feedback into shipped improvements

  • Operate in a fast-moving, ambiguity-tolerant environment

Tech Stack

  • TypeScript · React · Next.js · Node.js
  • PostgreSQL · AWS · Cloudflare
  • AI model integrations (multi-provider)

What We're Looking For

  • Senior Full-Stack Engineer (backend-leaning)

  • Strong systems design & architecture thinking

  • Experience building AI-enabled products (non-negotiable)

  • Hands-on exposure to:

    • Agentic workflows

    • Agent loops / orchestration

    • Model interaction patterns

  • Comfortable owning infrastructure & deployment layers

  • High agency: operates independently, drives decisions, ships fast

Bonus:

  • Early stage startup experience

  • Former founder / early engineer

  • Side projects with LLMs (OpenAI, Claude, etc.)

Compensation & Benefits

  • $200,000 – $240,000 base salary

  • Equity (early-stage upside)

  • Paid trial period (2 weeks, flights + accommodation covered)

  • High-impact role in a venture-backed AI company

Location & Eligibility (Strict)

On-site: San Francisco (non-negotiable)

  • US-based candidates preferred

  • European candidates considered if O-1 eligible

  • Must be willing to relocate and work fully in-office

Who Should NOT Apply

  • No hands-on AI product experience

  • Only enterprise / low-ownership environments

  • Prefer remote or hybrid work

  • Passive or low-agency working style

Ideal Candidate Profile

  • Built or shipped AI products (from scratch or early stage)

  • Thinks in systems, not just code

  • Thrives in high-energy, direct communication environments

  • Comfortable with ambiguity, speed, and ownership

Why This Role

  • Work on a next-gen AI system beyond chatbots real-world task execution
  • Join post-fundraising, pre-scale phase maximum impact
  • Collaborate with high-agency builders (ex-founders, CTOs)
  • Own features from idea architecture production iteration
  • Direct exposure to users, feedback loops, and product decisions
 This is where builders come to define the next era of AI — if you're ready to own, ship, and shape the future, we want to hear from you...