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LI.FI logo
LI.FI

The multi-chain liquidity gateway. A DeFi middleware to build crypto-enabled businesses.

Senior Backend Engineer – Perps

Backend EngineerSoftware EngineerFull TimeRemoteSeniorTeam 11-50H1B No SponsorCompany SiteLinkedIn

Location

United Kingdom

Posted

59 days ago

Salary

€90K - €130K / year

Seniority

Senior

Bachelor Degree5 yrs expEnglishJavaScriptMongoDBMySQLNode.jsRedisTypeScript

Job Description

Senior Backend Engineer – Perps

LI.FI

• Extend LI.FI’s API stack to include Hyperliquid ecosystem projects and feature sets • Design, build, and maintain backend services using Node.js and TypeScript • Work with MongoDB, Redis, and MySQL to support high-throughput, low-latency trading workflows • Collaborate closely with the Expansion PM and other backend engineers to improve integrations, routing, and user flows, and help evaluate new opportunities for feature expansion • Ensure robust, high-quality backend code with a strong focus on scalability, performance, and reliability for same-chain and cross-chain trading • Participate in code reviews, system design discussions, and technical documentation

Job Requirements

  • 5+ years of experience in crypto, ideally building or integrating production-grade DeFi or trading systems
  • Strong backend engineering background with hands-on experience in Node.js and TypeScript
  • Database experience with MongoDB, Redis, and MySQL in performance-sensitive backend environments
  • Hyperliquid 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 documentation
  • Hyperliquid focus: Genuine interest in the Hyperliquid ecosystem; prior projects, integrations, or self-driven exploration are highly valued
  • Orderbook fundamentals: Solid understanding of orderbook mechanics and comfort working with programmatic trading features
  • EVM & integration patterns: Experience building backend systems that integrate with EVM-based protocols; frontend or modal design work is not expected
  • Independence: Ability to drive integrations and propose new features with minimal oversight while collaborating effectively in a remote-first team
  • Cross-chain experience: Background working with bridges or backend infrastructure supporting multi-chain environments is a strong plus

Benefits

  • 30 days of PTO
  • Flexible remote days
  • Flexible working hours
  • Equity participation from day 1
  • Entitlement 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.

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