Engineering at Mainframe
We are building a world-class engineering team. We come from companies like Dropbox, Figma, Palantir, and Spotify. You’ll join a small, tight-knit group of creatives and engineers who are working to build the next shift in software at scale.
The Role
We’re looking for a founding engineer with strong backend instincts and product sensibility — someone who wants to build foundational infrastructure and shape what it enables. You’ll help us define core systems, scale intelligently, and ship fast without sacrificing craft.
Responsibilities
- Architect and ship scalable backend services that power real-time intelligent agents
- Design systems that balance speed, reliability, and evolving product needs
- Collaborate closely with product, design, and frontend engineers to shape the user experience
- Continuously evolve our architecture as we scale from early beta to tens of thousands of users
- Contribute not just code, but product thinking — from API design to agent orchestration strategies
Qualifications
- 4–8+ years of experience building production-grade backend systems
- Strong technical judgment and architectural instincts
- Experience with distributed systems, data modeling, and cloud infrastructure (we use Vercel + Convex)
- Comfort working across the stack, and collaborating cross-functionally with product + design
- Bias for clarity, speed, and clean interfaces
- Excitement about shaping a product in its earliest stages
Our stack
TypeScript, React, Next.js, Convex, Vercel, OpenAI, Claude, LangGraph
(Experience with these is a plus — but we care more about how you think and build.)