Propr.xyz is building a new Operating System for prop firms, helping them leverage blockchain technology to make them more efficient. We enable prop firms to leverage perpetual futures on Hyperliquid, prediction markets, and spot assets. We are actively deploying our technologies to the largest prop firms in the world. The pace is intense, but the journey is exciting. We only hire A-players. You need to be exceptional.
Responsibilities
- 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.
Requirements
- 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.
How to apply
We ask candidates to submit their application via a POST request to our API. This helps us identify candidates who read job descriptions carefully and have basic technical skills.
Skills Required
- 5+ years production backend experience
- Strong TypeScript or other strongly typed language background
- Experience with trading systems, financial infrastructure, or exchange-adjacent domains
- Distributed systems and transaction knowledge
- Modern backend framework experience (Node.js frameworks; NestJS preferred; Spring/FastAPI acceptable)
- SQL and production ORM experience (preferably TypeORM)
- Arbitrary precision decimal arithmetic experience in financial contexts
- Integration-first testing discipline and ability to write integration tests against real dependencies
- Able to ship React / Next.js features to completion
- Event sourcing experience
- Crypto exchange experience and familiarity with major exchange APIs (REST + WebSocket)
- AWS (ECS, Aurora, ElastiCache), Terraform
- Monorepo tooling (Turborepo, Nx)
- KYC / compliance workflows experience
- Crypto-native experience
What We Do
SwissBorg is democratising wealth management by making it fun, fair, and community-centric. Headquartered in Lausanne, Switzerland, SwissBorg has an international team of over 250 people and holds two licenses to provide Virtual Currency Exchange and Virtual Currency Wallets internationally as well as the French PSAN or DASP (digital asset service provider). We believe that blockchain technology can empower everyone to control their wealth and that this is the next step towards a world of decentralised nations, where every individual is welcome and is fairly rewarded for their contributions. SwissBorg App is a crypto wealth platform where 630k+ users buy, sell and earn on 40+ digital assets, 16 fiats, across 5 exchanges, and all in one app. By connecting to leading crypto exchanges: Binance, HitBTC, LMAX, Bitfinex and Kraken, our exclusive smart engine technology offers access to the best liquidity and rates in seconds while creating unlimited crypto/fiat trading pairs. Learn more at https://linktr.ee/SwissBorgofficial
