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# Software Engineer

- **Company:** Propr
- **Location:** UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Algorithmic Trading, Amazon Web Services, Distributed Systems, Object-Relational Mapping, Next.js, SQL Databases, TypeScript, WebSocket, ReactJS, Amazon ElastiCache, Backend, Fastapi, Event Sourcing, NestJS, Terraform, Monolithic Repository
- **Published:** October 13, 2026
- **Apply:** https://propr.xyz/api/hiring/apply

## About the Role

* 5+ years production backend experience.
 * Strong TypeScript or other strongly typed language background.
 * Experience with trading systems, financial infrastructure, or exchange adjacent domains.
 * Distributed system and transaction knowledge.
 * Modern Node.js backend framework (NestJS preferred; Spring / FastAPI / similar acceptable).
 * SQL and a production ORM (preferably TypeORM).
 * Arbitrary precision decimal arithmetic in financial contexts.
 * Integration first testing discipline.
 * Able to ship React / Next.js features to completion.

Bonus

 * Event sourcing experience.
 * Crypto exchange experience.
 * Direct experience with major exchange APIs (REST + WebSocket).
 * AWS (ECS, Aurora, ElastiCache etc.), Terraform.
 * Monorepo tooling (Turborepo, Nx).
 * KYC / compliance workflows.
 * Crypto native.

## Description

* Design and implement backend services across the trading domain.
 * Own features end to end: schema, API, tests, UI integration.
 * Contribute to real time infrastructure and client facing APIs.
 * Write integration tests against real dependencies.