Remote Back End Software Engineer

We are looking for a Software Engineer at Propr.xyz in Spain. This role offers the opportunity to work at the intersection of backend engineering and cutting-edge financial technologies. You will contribute to building scalable systems that power modern trading infrastructure, including blockchain-based solutions and real‑time data services. The environment is fast‑paced and highly technical, designed for engineers who thrive on ownership and delivering impactful solutions end‑to‑end. You’ll collaborate across the stack, shaping APIs, data models, and integrations that directly influence performance and user experience. The position emphasizes autonomy, technical excellence, and a strong product mindset. It’s ideal for someone eager to solve complex challenges in distributed systems and financial domains while working remotely within a high‑performance team.

Accountabilities:

Design and implement robust backend services tailored to trading and financial systems

Own features end‑to‑end, including database schema design, API development, testing, and frontend integration

Build and maintain real‑time infrastructure and high‑performance client‑facing APIs

Develop and execute integration tests using real dependencies to ensure system reliability

Collaborate across teams to deliver scalable, production‑ready features

Requirements:

At least 5 years of production experience in backend engineering

Strong proficiency in TypeScript or another strongly typed programming language

Experience working with trading systems, financial infrastructure, or exchange‑related environments

Solid understanding of distributed systems and transaction processing

Familiarity with modern backend frameworks (e.g., NestJS, Spring, FastAPI)

Proficiency in SQL and experience with production‑grade ORMs (ideally TypeORM)

Knowledge of precise decimal arithmetic in financial contexts

Strong testing mindset, particularly integration‑first approaches

Ability to independently deliver frontend components using React or Next.js

Benefits:

Fully remote position within the European time zone

Opportunity to work on cutting‑edge blockchain and trading technologies

High‑impact role with end‑to‑end ownership of features

Collaborative, fast‑paced, and performance‑driven environment

Exposure to advanced infrastructure tools and modern development practices

Competitive compensation aligned with experience and expertise

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