Build the engine behind serious deals.
Quantum is a high-frequency cryptographic data room, not a CRUD app. If you care about correctness, performance, and the systems beneath both, there is real work here.
How we work.
Correctness first
We handle the documents behind real deals. Cache locality and zero-copy matter, but a wrong byte is the only bug that counts.
Boring data, fast code
Conservative technology for storage and state; bleeding edge only where speed and cryptography demand it.
Small surface, deep work
A compact team owning whole problems end to end — from the engine to the pixel — without layers in between.
The stack.
Boring technology for data, bleeding edge for speed.
Rust
Core engine
PostgreSQL
Supabase
React 19
Next.js App Router
WASM
Client-side crypto
Open positions.
Senior Systems Engineer
Frontend Architect
Solutions Architect
Don't see your role? Tell us what you'd build — get in touch.
One team, the whole problem.
Apply directly — a short conversation with the people you'd work with, not a hiring funnel.
Start a conversation