Senior Backend Engineer

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October 7

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LI.FI

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API • Crypto • Fintech

LI. FI is a platform that provides developers with a single API to facilitate swaps, bridges, and zaps across major blockchains and protocols. The company aggregates decentralized exchange (DEX) aggregators, bridges, and intent systems to streamline trading across these platforms, thereby saving developers extensive hours of work. With a focus on security, LI. FI collaborates with trusted organizations for risk assessment and mitigation while offering monetization features like flexible fee structures. LI. FI supports trading across over 20 chains and provides customizable widgets for developers aiming for quick go-to-market solutions. The platform emphasizes DeFi infrastructure to accelerate crypto adoption.

11 - 50 employees

🔌 API

₿ Crypto

💳 Fintech

📋 Description

• Extend LI.FI’s API stack to include Hyperliquid ecosystem projects and feature set • Collaborate closely with the Expansion PM and other backend engineers to improve integrations, routing, and user flows; help evaluate new opportunities for feature extension. • Ensure robust, high-quality backend code, focusing on scalability and reliability for same-chain and cross-chain trading. • Participate in code reviews, system design, and documentation.

🎯 Requirements

• Familiarity with Hyperliquid’s architecture: You understand builder codes (spot, perps), HIP-3, precompiles, and HyperEVM at a design level and keep up with evolving documentation. • Hyperliquid focus: You should be passionate about the Hyperliquid ecosystem and be able to demonstrate your familiarity with the ecosystem — past projects or self-driven exploration are valued • Orderbook fundamentals: You grasp the mechanics of orderbooks and are comfortable working with programmatic trading features • Backend focus: Solid backend engineering background, especially with EVM and integration patterns; front-end or modal design work is *not* expected. • TypeScript proficiency: Experience building scalable APIs and backend systems in TypeScript. • Independence: Can drive integrations and new feature proposals with minimal oversight, collaborating effectively in a remote-first team. • Cross-chain experience: Experience with bridges and backend infrastructure supporting a multi-chain environment is highly valued. • Bonus: Familiarity with Solana, Bitcoin, or mobile backend development.

🏖️ Benefits

• Annual 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 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.