Senior Software Engineer, Node.js

1inch; England; Hybrid; GBP 89,000 - 133,000; Full time

Benefits offered by this job

Competitive salary

Unlimited vacation days

Fully compensated work gear

Annual team retreat

Job summary

A leading DeFi company is seeking a Senior Software Engineer focused on designing and implementing scalable microservices and APIs. The role offers a hybrid work schedule and is ideal for candidates with experience in fintech or blockchain technologies. Responsibilities include optimizing backend components and ensuring service architecture efficiency while promoting best practices. Competitive pay and unlimited vacation included.

Qualifications

• Experience in fintech, DeFi or crypto projects.
• Experience with microservices architecture in a high-load environment.
• Experience managing metrics pipelines and alerting systems.

Responsibilities

• Design and implement scalable microservices and APIs.
• Ensure low latency and high throughput in service architecture.
• Write clean, maintainable, and well-documented code.
• Monitor technical and business metrics.
• Perform system performance analysis.
• Participate in code reviews and architecture discussions.
• Promote best engineering practices across the team.
• Ensure backend systems are secure and resilient.
• Identify and mitigate system vulnerabilities.
• Stay updated with emerging backend technologies.
• Continuously seek ways to improve system architecture and performance.

Skills

Node.js/TypeScript

SQL

PostgreSQL

Redis

NATS

Kafka

Prometheus

Grafana

Blockchain fundamentals

Web3

Solidity

CI/CD pipelines

Docker

Kubernetes

Tools

Redis

NATS

EMQX

Kafka

Prometheus

Grafana

Nest.js

ethers.js

web3.js

Docker

Kubernetes

PostgreSQL

Job description

Overview

1inch 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.

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

Why you’ll love working with us

• Join a young, creative team in a fast-paced and supportive environment
• We’re open to new ideas — if you’ve got a vision, pitch it and make it happen
• Enjoy competitive pay that matches your skills and experience
• Be part of a company that’s shaping the future of DeFi
• Take time when you need it — we offer unlimited vacation days
• Get fully compensated for your work gear — we’ll set you up for success
• Travel with us! We host an annual team retreat at a top international location