Senior Software Engineer, Node.js

The Senior Backend Engineer role focuses on developing high-performance, scalable backend systems, requiring expertise in node.js ecosystem (including Nest.js), microservices architecture design, monitoring tools, and different kind of storages. Contributor required to have a good knowledge about blockchain technologies. Contributor responsibilities related to the development of services for the whole 1inch infrastructure.

Responsibilities

• Designing and implementing scalable microservices and high-performance APIs using Nest.js.
• Ensuring low latency and high throughput in service architecture.
• Writing clean, maintainable, and well-documented code while following internal coding standards.
• Monitoring technical and business metrics and setting up alerting systems for early incident detection.
• Performing regular profiling and system performance analysis to optimise backend components, including database queries and response times.
• Participating in code reviews and engaging in architecture discussions and sprint planning sessions.
• Promoting best engineering practices across the team.
• Ensuring backend systems are secure, scalable, and resilient.
• Applying industry best practices for data protection and system design.
• Proactively identifying and mitigating system vulnerabilities.
• Staying updated with emerging backend technologies and introducing new tools and practices to enhance team efficiency.
• Continuously seeking ways to improve system architecture and performance

Requirements

• Previous experience working in fintech, DeFi, or crypto projects
• Experience with microservices architecture in a high-load environment
• Experience setting up and managing metrics pipelines and alerting systems

Skills

• Proficient in Node.js/TypeScript with strong SQL skills and PostgreSQL experience
• Familiar with Redis, message brokers (e.g. NATS, EMQX, Kafka), and monitoring tools (Prometheus, Grafana)
• Good understanding of blockchain fundamentals, Web3, and Solidity
• Knowledge of CI/CD pipelines, Docker, and basic Kubernetes concepts
• Strong problem-solving abilities, proactive communication, and quality-driven mindset

Nice To Have

• Nest.js
• Knowledge of event-driven architecture
• Knowledge of Web3 libraries (ethers.js, web3.js) for blockchain interactions