Senior Backend Engineer (Partner Service)

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’re looking for a Senior Backend Engineer to strengthen our engineering team, with a strong focus on API design and long-term system quality. You’ll join the team building and evolving our partner backoffice software and act as a senior individual contributor with meaningful technical influence across the product.This role sits within a cross-functional team made up of a Product Owner, frontend engineers, and backend engineers, jointly responsible for building and maintaining our partner backoffice software.Location requirement: You must be located in the EMEA region. Applications outside EMEA will not be considered.Tech StackNode.js with TypeScript, running in Docker containersMongoDB and Redisethers.js for blockchain communicationGitHub, Kubernetes, AWS, Cloudflare for our GitOps CD pipelineWhat you’ll doDesign, develop, and maintain backend systems and APIs, with a strong emphasis on clear, consistent, and well-versioned API designTake ownership of API contracts and backend interfaces used by frontend applications and partner-facing systemsContribute to the architecture of scalable and robust backend solutions that support growing usage and evolving product needsMaintain high engineering standards through code reviews, thoughtful abstractions, and clean, readable codeIdentify performance bottlenecks and optimize system behavior, data access patterns, and caching strategiesImplement and maintain monitoring, logging, and debugging tooling to ensure high availability and operational confidenceBuild and maintain comprehensive test suites, including unit, integration, and end-to-end testsAct as a senior technical contributor within the team, supporting other engineers through collaboration, reviews, and design discussionsAnalyze complex technical problems and propose pragmatic, production-ready solutionsDocument APIs, systems, and technical decisions to support knowledge sharing and onboardingWhat makes a good candidateMust be located in the EMEA regionStrong professional experience with TypeScript and Node.jsExtensive experience working as a senior backend engineer on production systemsProven ability to design clean, maintainable, and scalable APIsSolid understanding of document databases and caching systems (e.g. MongoDB, Redis)Experience with backend architecture and system design in distributed environmentsDeep knowledge of testing principles and modern testing frameworksStrong communication and collaboration skills in cross-functional teamsProactive, self-directed, and comfortable taking ownership of backend domainsAbility to write maintainable, scalable, production-grade codeExperience or interest in blockchain or EVM-based systems is a plus, but not requiredVery strong written and spoken EnglishBachelor’s or Master’s degree in Computer Science 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!