Fullstack Engineer

What is a Fullstack Engineer?

A fullstack engineer works across the entire technology stack — frontend UI, backend APIs, and often database and infrastructure — with enough depth to ship features independently without handing off between specialists. At early-stage startups, fullstack engineers are invaluable: they move fast, unblock themselves, and eliminate the coordination overhead that slows small teams.

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At what stage should you hire a Fullstack Engineer?

Fullstack engineers are the lifeblood of Seed and Series A startups. When your team is 2–8 engineers and speed is the primary constraint, fullstack generalists out-deliver specialist siloes by a significant margin. Post-Series B, as complexity grows, teams often evolve toward more specialized frontend and backend roles — but fullstack engineers remain valuable as long as product iteration speed matters.

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Common titles for this role

• Fullstack Engineer
• Full-Stack Software Engineer
• Full-Stack Developer
• Founding Engineer (often fullstack at early stage)
• Senior Fullstack Engineer
• Product Engineer

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Typical background

The strongest fullstack engineers at startups have shipped complete features — from database migration through API through UI — in fast-moving environments. RFS looks for candidates who are comfortable with React or Vue on the frontend, Node.js or Python on the backend, and PostgreSQL or similar for data. Many of our placed fullstack engineers come from Series A/B companies where they were among the first 10 engineers.

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What does a Fullstack Engineer do at a startup?

• Build complete user-facing features from database schema through API through React/Next.js UI
• Own the frontend architecture: component library, state management, performance optimization
• Design and implement backend APIs, authentication, and business logic
• Write and run database migrations, optimize queries, and maintain data integrity
• Set up and maintain CI/CD pipelines and deployment infrastructure
• Write tests: unit, integration, and end-to-end
• Collaborate directly with designers to translate Figma designs into production UI

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Key skills and qualifications

• Proficiency in a modern frontend framework: React, Next.js, Vue, or Svelte
• Backend experience in Node.js, Python (FastAPI/Django), Ruby on Rails, or similar
• Comfortable with relational databases: SQL, PostgreSQL, query optimization
• Familiarity with cloud infrastructure: AWS, GCP, Vercel, or Heroku
• Experience with TypeScript strongly preferred
• Ability to ship features independently without heavy coordination overhead

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Why hire your Fullstack Engineer through RFS?

• Fullstack engineers are our highest-volume placement type at Seed and Series A — we know this search cold
• 29-day average time to hire — we move faster than any retained search firm
• We screen specifically for startup fit: engineers who thrive in ambiguity, not those who need process
• 300+ placements across 150+ VC-backed companies — our network reaches engineers not on job boards
• No upfront fees — you pay only when we successfully place the right person