Senior Backend Engineer
Fully Remote | Preference: Germany, UK, Spain
Salary: up to £120,000 per annum plus signing bonus
We’re partnering with a fast-growing fintech / DeFi company that’s building infrastructure to enable financial freedom through blockchain technology. Their products power secure, high-performance financial applications used by thousands of users and builders across the digital asset ecosystem.
They’re looking for a Senior Backend Engineer to join the team and deliver scalable, high-throughput systems that form the backbone of their platform. This is a fully remote role with a focus on real impact, innovation, and technical excellence.
What You’ll Do
Build and maintain scalable backend microservices using NestJS
Design and implement high-performance, low-latency APIs and backend systems
Monitor system performance and reliability, ensuring uptime and stability
Profile and optimise databases, queries, and service throughput
Maintain code quality through documentation, reviews, and internal best practices
Set up alerting and monitoring systems for proactive incident management
Collaborate with engineering and product teams to shape architecture and sprint plans
Stay up to date with emerging technologies and introduce improvements to tools and processes
What We’re Looking For
3+ years of professional experience with Node.js and NestJS
Strong experience building microservices architectures for high-load systems
Proficiency with TypeScript, SQL, and PostgreSQL
Familiarity with Redis, message brokers (e.g., NATS, Kafka), and monitoring tools (Prometheus, Grafana)
Understanding of blockchain fundamentals, Web3, and related technologies
Working knowledge of CI/CD pipelines, Docker, and basic Kubernetes
Agile mindset with excellent communication and problem-solving skills
Ability to work remotely in a distributed, cross-functional team environment
Nice to Have
Deep familiarity with event-driven architectures and asynchronous patterns
Experience using Web3 libraries like ethers.js or web3.js
Prior experience in DeFi, fintech, or crypto environments
What’s On Offer
Salary up to £120,000 per annum
Fully remote role with flexibility in hours
Work with a highly skilled, innovative, and motivated team
Opportunity to shape the future of DeFi infrastructure
Unlimited vacation policy
Full compensation for work setup (laptop, monitors, etc.)