Senior Backend Engineer

Summary

Join LI.FI, a company simplifying multi-chain DeFi, as a Senior Backend Engineer. Lead the design, development, and maintenance of robust, scalable, and secure backend systems. Collaborate with cross-functional teams to deliver high-quality software solutions. The ideal candidate will have strong TypeScript experience, blockchain expertise, and extensive professional experience in a similar role. Location must be in the EMEA region. LI.FI offers various benefits including annual team offsites, 30 days of PTO, flexible remote days and working hours, equity participation, and a personal development budget.

Requirements

• Must be located in the EMEA region
• Strong TypeScript experience is a must
• Previous working experience in the blockchain space, technical understanding of the EVM ecosystem (or other ecosystems) is a must
• Extensive professional experience in a similar role (as senior or lead)
• Understanding of document databases and caching
• Experience in software design and architecture
• Deep knowledge of testing frameworks and principles
• Strong communication, collaboration, problem-solving and analytical skills
• Proactivity, strong ability to work well within a team and to be self-guided on a day-to-day basis
• Ability to write maintainable, scalable, production-grade code
• Passion for new technologies and ability to autonomously evaluate them and make suggestions for improvement
• Very strong verbal and writing skills in English to allow effective communication with team members and stakeholders in meetings and documents

Responsibilities

• Leading and actively participating in the design, development, and maintenance of backend systems and APIs
• Architecting and implementing scalable and robust backend solutions that can handle growing user loads and evolving business needs
• Maintaining high coding standards, conduct code reviews, and ensuring best practices for code maintainability and readability
• Identifying bottlenecks and optimizing code and algorithms to improve system performance
• Implementing monitoring and debugging tools to proactively identify and resolve issues, ensuring high system availability
• Developing and maintaining comprehensive test suites, including unit tests, integration tests, and end-to-end tests, to ensure the reliability of backend systems
• Providing guidance and mentorship to junior developers, helping them grow their technical skills
• Analyzing complex technical problems and propose effective solutions to address them
• Documenting code, APIs, and technical processes to facilitate knowledge sharing within the team and support onboarding of new developers

Preferred Qualifications

• Bachelor's or Master's degree in Computer Science is a plus
• Experience with smart contract development is a plus
• Proficiency in Golang is a plus

Benefits

• Annual team offsites (Thailand in 2023 and Vietnam in 2024 were a blast, Marrakech in March 2025 was blast-ier; let’s see what happens in 2026!)
• 30 days of PTO
• Flexible remote days
• Flexible working hours
• Equity participation from day 1
• Entitlement to work computer (choice of equipment)
• 1 Conference per year near your city of residence
• An annual 1,000€ personal development budget once you have worked 6+ months (pro-rated the first year)
• A one-time 1,000€ remote budget to use on coworking, office setup, etc