Back-End Engineer, Trading

United Kingdom·Londonmid

EngineeringBackend Developer

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Quick Summary

Overview

Blockchain is connecting the world to the future of finance. As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency.

Technical Tools

EngineeringBackend Developer

Responsibilities

~2 min read

→Design, build, and operate backend services in Kotlin and Python that power our trading products, from core trading workflows to client-facing APIs.
→Develop and improve services for order management, market data processing, and trade lifecycle handling in a real-time, high-volume environment.
→Build and maintain REST APIs and WebSocket streams that deliver real-time prices, order updates, and account data.
→Collaborate with cross-functional teams — product, frontend, trading — to adapt the platform quickly to new features and market conditions.
→Ensure high availability, reliability, and scalability of trading services, with a sharp focus on latency, observability, and testing.
→Contribute to architecture discussions and technical decisions, writing clean, maintainable code and sharing knowledge across the team.

→Professional experience building backend services, ideally in Kotlin and/or Python.
→Solid experience designing and building backend services and REST APIs; experience with WebSockets or other real-time streaming protocols such as NATS/JETSREAM is a plus.
→Working knowledge of SQL and experience integrating with multiple internal or third-party services.
→An understanding of performance fundamentals — identifying bottlenecks, managing latency, and building systems that stay responsive under load; experience with real-time or event-driven systems is a plus.
→Strong problem-solving skills and clear communication with both technical and non-technical colleagues.
→Curiosity and enthusiasm for learning new technologies; interest in financial markets or crypto is a plus, not a requirement.
→Familiarity with Docker/Kubernetes and cloud environments (AWS) is a plus.