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Founding Software Engineer

San Francisco, California, United StatesHybridFull Time$150,000–$300,000 /yrPosted 2 months agoVisa sponsorship available

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Role summary

Seeking a Founding Software Engineer to design and build core systems, including APIs, data models, real-time pipelines, and secure infrastructure. This early-hire role involves significant technical ownership, working directly with founders on technical direction and setting engineering standards. Responsibilities include architecting backend services, distributed systems, scalable APIs, and async workflows, with occasional full-stack feature development. The ideal candidate possesses strong Python (Django/FastAPI) or Go, solid React experience, proven production system design, and cloud-native AWS expertise, along with a startup mindset and comfort with ambiguity.

Location: San Francisco / Hybrid / On-site
Experience: 3–10 years
Stage: Seed → Series B
Role Type: Early hire / founding engineer

Compensation: $150k to $300k
Full time position
This role is for a client of Weekday
Why This Role Exists

You’ll design and build the systems that power the product — from APIs and data models to real-time pipelines and secure infrastructure. You’ll be a core technical owner working directly with the founders.

What You’ll Do

  • Architect backend services and distributed systems
  • Build scalable APIs and async workflows
  • Ship full-stack features when needed
  • Own performance, reliability, and security
  • Work directly with founders on technical direction
  • Set engineering standards and tooling
  • Leverage AI developer tools to accelerate delivery

Requirements
What We’re Looking For

  • Strong Python (Django/FastAPI) or Go
  • Solid React experience
  • Proven production system design
  • Cloud-native on AWS
  • Startup mindset and comfort with ambiguity

Nice to Have

  • Kafka / message queues
  • Postgres / DynamoDB
  • Terraform / Kubernetes
  • Regulated environments (healthcare / fintech)
  • LLM integrations, AI observability, or internal AI tooling
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