Senior Backend Engineer

LI.FI is simplifying multi-chain DeFi for traditional financial institutions, fintechs and service providers by offering a unified API to access all on-chain liquidity across major blockchains for best price same-chain and cross-chain swaps. We are a passionate team on a mission to enable a fairer, more decentralised world. Apart from the tech, we care a lot about user experience and aim to make complex technologies accessible to everyone.A quick run-down of the jobWe are looking for a Senior Backend Engineer who will lead the design, development, and maintenance of our backend systems, ensuring they are robust, scalable, and secure. You'll collaborate closely with cross-functional teams, including frontend developers, product managers, and designers, to deliver high-quality software solutions that drive our success. The position will report to our Backend Lead.The current tech stack of LI.FI utilizes:Node.js running TypeScript code in Docker containersMongoDB and Redis for our dataethers.js for communication with the blockchainsGithub, Kubernetes, AWS and CloudFlare for our GitOps CD chainPlease note: You must be located in the EMEA or APAC regions and have technical understanding of blockchain. Your application will not be considered otherwise.What you'll doLeading and actively participating in the design, development, and maintenance of backend systems and APIsArchitecting and implementing scalable and robust backend solutions that can handle growing user loads and evolving business needsMaintaining high coding standards, conduct code reviews, and ensuring best practices for code maintainability and readabilityIdentifying bottlenecks and optimizing code and algorithms to improve system performanceImplementing monitoring and debugging tools to proactively identify and resolve issues, ensuring high system availabilityDeveloping and maintaining comprehensive test suites, including unit tests, integration tests, and end-to-end tests, to ensure the reliability of backend systemsProviding guidance and mentorship to junior developers, helping them grow their technical skillsAnalyzing complex technical problems and propose effective solutions to address themDocumenting code, APIs, and technical processes to facilitate knowledge sharing within the team and support onboarding of new developersWhat makes a good candidateMust be located in the EMEA regionStrong TypeScript experience is a mustPrevious working experience in the blockchain space, technical understanding of the EVM ecosystem (or other ecosystems) is a nice to have.Extensive professional experience in a similar role (as senior or lead)Understanding of document databases and cachingExperience in software design and architectureDeep knowledge of testing frameworks and principlesStrong communication, collaboration, problem-solving and analytical skillsProactivity, strong ability to work well within a team and to be self-guided on a day-to-day basisAbility to write maintainable, scalable, production-grade codePassion for new technologies and ability to autonomously evaluate them and make suggestions for improvementVery strong verbal and writing skills in English to allow effective communication with team members and stakeholders in meetings and documentsBachelor's or Master's degree in Computer Science is a plusExperience with smart contract development is a plusProficiency in Golang is a plusCompany cultureEmbracing the differencesEmbrace your own differencesRespect and welcome the unique qualities of othersSee others’ differences as an opportunity to growOwn it, do itOwn tasks end-to-endHold yourself to a high bar for executionMake bold decisions, and be accountableUnderstand your limitations and seek for helpFail forwardTry - don’t be afraid to failLearn - don’t make the same mistake twiceAdapt - grow with the experienceHave fun togetherTake the time to get to know and understand each other betterDon’t take yourself too seriously and keep it light-heartedFun should be coming from a place of love and respectWhat you’ll getAnnual 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 PTOFlexible remote daysFlexible working hoursEquity participation from day 1Entitlement to work computer (choice of equipment)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.If you join us as an independent contractor, you’re only entitled to the first five benefits of this list.Application processSetting yourself up for success starts with the application! Click here to discover valuable tips that will help you navigate our application process effectively.LI.FI is an equal opportunity employer. We encourage individuals of all backgrounds to apply. Join us in our dedication to fostering a workplace that values and respects each team member's unique contributions.Shortlisted candidates will undergo a comprehensive interview process, including a people operations interview, a take-home assignment, a meet-the-team & founder interview, and a reference check.For more information, visit our page detailing our hiring process!