Back-End Engineer, Trading
Blockchain.com2 months ago
London, United KingdomMid Level
Responsibilities
- Design, build, and operate backend services in Kotlin and Python for cryptocurrency trading products.
- Develop order management, market data processing, and trade lifecycle services in a real-time, high-volume environment.
- Build and maintain REST APIs and WebSocket streams for real-time prices, order updates, and account data.
- Collaborate with product, frontend, engineering, and trading teams on new features and market conditions.
- Improve the availability, reliability, scalability, latency, observability, and testing of trading services.
- Contribute to architecture discussions, technical decisions, clean code, and knowledge sharing.
Requirements
- Professional experience building backend services, ideally with Kotlin and/or Python.
- Experience designing and building backend services and REST APIs.
- Experience with WebSockets or other real-time streaming protocols such as NATS/JetStream is a plus.
- Working knowledge of SQL and experience integrating multiple internal or third-party services.
- Understanding of performance fundamentals, bottleneck identification, latency management, and responsive systems under load.
- Experience with real-time or event-driven systems is a plus.
- Strong problem-solving and communication skills with 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 AWS is a plus.
Benefits
- Full-time salary based on experience and meaningful equity.
- Role based in the London office with mandatory in-office attendance four days per week.
- Work from Anywhere Policy allowing up to 20 remote-work days.
- ClassPass.
- Learning and professional development budgets.
- Unlimited vacation policy.
- Apple equipment.
- Flexible work culture and career opportunities at a global technology company.
About Blockchain.com
Blockchain.com builds a cryptocurrency platform spanning a self-custody wallet, retail exchange, and institutional trading and custody services. It earns revenue from trading, spreads, and related fees for retail and institutional clients. Founded in 2011 and headquartered in London, the company reports over 90 million wallets, over 40 million verified users, and more than $1 trillion in crypto transactions.