Senior Backend Engineer (Fee Consolidation 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 join our backend organization and strengthen the team building our partner backoffice software, with an added emphasis on crypto literacy and blockchain-aware system design. This role is aimed at a senior individual contributor who is comfortable operating in crypto products as a user and can translate that understanding into robust backend and API decisions.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 clean, consistent, and evolvable API designBuild backend functionality that interacts with crypto-native concepts and workflows, informed by hands-on experience as a crypto userCollaborate closely with frontend engineers and product to translate crypto-related requirements into intuitive, reliable backend interfacesContribute to the architecture of scalable and robust backend solutions that support partner-facing and internal use casesMaintain high engineering standards through code reviews, strong abstractions, and clear, readable codeIdentify performance and reliability bottlenecks and improve system behavior, data access patterns, and caching strategiesImplement and maintain monitoring, logging, and debugging tooling to ensure high system availabilityBuild and maintain comprehensive automated test suites across backend servicesAct as a senior technical contributor within the team, supporting design discussions and raising the overall technical barDocument APIs, system behavior, and technical decisions for long-term maintainabilityWhat 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 and maintain high-quality APIsPractical familiarity with crypto products and ecosystems as a user (wallets, swaps, bridges, DeFi, etc.)Development experience in blockchain or Web3 systems is a plus, but not requiredSolid 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 backend 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 codeVery 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!