About the Position

Software Engineer | Propr.xyz

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.

Nice to Have

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.

We Offer

Competitive salary
Opportunity to work remotely or from our office in Barcelona
Be part of a leading fintech company
Work on cutting-edge blockchain technology

About the Company

SwissBorg

Website: https://swissborg.com
Industry: Fintech
Headquarters: Lausanne, Switzerland
Company Size: 200 - 500
Founded: 2017

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.

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"
}

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Software Engineer | Propr.xyz

Job description