SwissBorg

Software Engineer | Propr.xyz

Reposted 7 Days Ago

26 Locations

Remote

Senior level

Blockchain • Machine Learning • Financial Services • Cryptocurrency

The Role

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Summary Generated by Built In

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.

POST

https://propr.xyz/api/hiring/apply

Request body:

{ "roleSlug": "software-engineer", "name": "Your Name", "email": "[email protected]", "link": "https://github.com/yourprofile", "coverNote": "Why Propr?", "exceptionalNote": "What makes you exceptional?", "telegramHandle": "@yourhandle", "appUid": "optional-trading-terminal-uid" }

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

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