Senior Software Engineer, Node.js in London

Overview1inch is the DeFi ecosystem building financial freedom for everyone. 1inch products help users and builders trade, hold and track digital assets—with self-custody, security and an intuitive user experience to unlock true crypto ownership. 1inch protocols and APIs provide core infrastructure across the DeFi industry and beyond. We’re looking for an enterprise-oriented Senior Software Engineer with a focus on structure and scalability.Location: We hire with a focus on Dubai and Europe. For this role, we prefer candidates who are either based in Dubai or working remotely within +/- 4 hours GST time. The position is based on a hybrid schedule, with a minimum of three days per week on-site in our Dubai office.ResponsibilitiesDesigning and implementing scalable microservices and high-performance APIs using Nest.jsEnsuring low latency and high throughput in service architectureWriting clean, maintainable, and well-documented code while following internal coding standardsMonitoring technical and business metrics and setting up alerting systems for early incident detectionPerforming regular profiling and system performance analysis to optimise backend components, including database queries and response timesParticipating in code reviews and engaging in architecture discussions and sprint planning sessionsPromoting best engineering practices across the teamEnsuring backend systems are secure, scalable, and resilientApplying industry best practices for data protection and system designProactively identifying and mitigating system vulnerabilitiesStaying updated with emerging backend technologies and introducing new tools and practices to enhance team efficiencyContinuously seeking ways to improve system architecture and performanceRequirementsPrevious experience working in fintech, DeFi, or crypto projectsExperience with microservices architecture in a high-load environmentExperience setting up and managing metrics pipelines and alerting systemsSkillsProficient in Node.js/TypeScript with strong SQL skills and PostgreSQL experienceFamiliar with Redis, message brokers (e.g. NATS, EMQX, Kafka), and monitoring tools (Prometheus, Grafana)Good understanding of blockchain fundamentals, Web3, and SolidityKnowledge of CI/CD pipelines, Docker, and basic Kubernetes conceptsStrong problem-solving abilities, proactive communication, and quality-driven mindsetNice To HaveNest.jsKnowledge of event-driven architectureKnowledge of Web3 libraries (ethers.js, web3.js) for blockchain interactionsWhy you’ll love working with usJoin a young, creative team in a fast-paced and supportive environmentWe’re open to new ideas — if you’ve got a vision, pitch it and make it happenEnjoy competitive pay that matches your skills and experienceBe part of a company that’s shaping the future of DeFiTake time when you need it — we offer unlimited vacation daysGet fully compensated for your work gear — we’ll set you up for successTravel with us! We host an annual team retreat at a top international location
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