Senior Backend Engineer - Perps

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 with a dedicated focus on integrating Hyperliquid functionalities into our API platform. This role is backend-only—no frontend or design work required—letting you shape core integrations at the infrastructure layer. The ideal candidate is excited about Hyperliquid and its protocols, eager to help us distribute programmatic trading features (e.g., TWAP, perps) to the broader DeFi ecosystem through performant backend systems.Please note: You must be located in the EMEA region. Your application will not be considered otherwise.What you'll doExtend LI.FI’s API stack to include Hyperliquid ecosystem projects and feature setsDesign, build, and maintain backend services using Node.js and TypeScriptWork with MongoDB, Redis, and MySQL to support high-throughput, low-latency trading workflowsCollaborate closely with the Expansion PM and other backend engineers to improve integrations, routing, and user flows, and help evaluate new opportunities for feature expansionEnsure robust, high-quality backend code with a strong focus on scalability, performance, and reliability for same-chain and cross-chain tradingParticipate in code reviews, system design discussions, and technical documentationWhat makes a good candidate5+ years of experience in crypto, ideally building or integrating production-grade DeFi or trading systemsStrong backend engineering background with hands-on experience in Node.js and TypeScriptDatabase experience with MongoDB, Redis, and MySQL in performance-sensitive backend environmentsHyperliquid architecture familiarity: Understanding of builder codes (spot, perps), HIP-3, precompiles, and HyperEVM at a design level, with the ability to keep up with evolving documentationHyperliquid focus: Genuine interest in the Hyperliquid ecosystem; prior projects, integrations, or self-driven exploration are highly valuedOrderbook fundamentals: Solid understanding of orderbook mechanics and comfort working with programmatic trading featuresEVM & integration patterns: Experience building backend systems that integrate with EVM-based protocols; frontend or modal design work is not expectedIndependence: Ability to drive integrations and propose new features with minimal oversight while collaborating effectively in a remote-first teamCross-chain experience: Background working with bridges or backend infrastructure supporting multi-chain environments is a strong plusBonus: Familiarity with Solana, Bitcoin, or mobile backend development.How we hireWe prioritize candidates who show genuine excitement for Hyperliquid and demonstrate technical familiarity with its protocols. Expect conversations where you can showcase prior Hyperliquid-related projects and discuss ideas for future integration work. We won’t require prior Hyperliquid work experience but will test your understanding through interview discussions and portfolio review.Company 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!