Founding Full-Stack Engineer

Location: San Francisco / On-site
Experience: 2–8 years
Stage: Seed → Series B

Compensation: $150k to $300k

Role type: Full-time

This role is for a client of Weekday

Why This Role Exists

You’ll help build the core product from the ground up. This is a hands-on role for someone who loves shipping, thrives in ambiguity, and wants ownership over major product surfaces at an early-stage company.

What You’ll Do

• Build end-to-end product features across frontend and backend
  

• Ship quickly in 0→1 environments
  

• Design APIs, schemas, and workflows
  

• Partner closely with founders, product, and design
  

• Improve reliability, performance, and developer experience
  

• Establish engineering best practices
  

• Use modern AI developer tools to move faster (LLM copilots, agent workflows, testing automation)
  

Requirements

What We’re Looking For

• Strong TypeScript, React, and Node.js
  

• Experience shipping production web products
  

• Startup or founding-engineer background (or equivalent)
  

• Product-minded builder with high ownership
  

• Comfortable working independently in small teams
  

Nice to Have

• Next.js
  

• Postgres / Redis
  

• AWS / GCP
  

• Experience integrating LLM APIs or AI tooling
  

• Docker & CI/CD
  

• Active GitHub presence