Backend Engineer (Fee Consolidation Service)

We'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., * Design, develop, and maintain backend systems and APIs, with a strong emphasis on clean, consistent, and evolvable API design

• Build backend functionality that interacts with crypto-native concepts and workflows, informed by hands-on experience as a crypto user
• Collaborate closely with frontend engineers and product to translate crypto-related requirements into intuitive, reliable backend interfaces
• Contribute to the architecture of scalable and robust backend solutions that support partner-facing and internal use cases
• Maintain high engineering standards through code reviews, strong abstractions, and clear, readable code
• Identify performance and reliability bottlenecks and improve system behavior, data access patterns, and caching strategies
• Implement and maintain monitoring, logging, and debugging tooling to ensure high system availability
• Build and maintain comprehensive automated test suites across backend services
• Act as a senior technical contributor within the team, supporting design discussions and raising the overall technical bar
• Document APIs, system behavior, and technical decisions for long-term maintainability, + Embrace your own differences

• Respect and welcome the unique qualities of others
• See others' differences as an opportunity to grow

• Own it, do it

• Own tasks end-to-end
• Hold yourself to a high bar for execution
• Make bold decisions, and be accountable
• Understand your limitations and seek for help

• Fail forward

• Try - don't be afraid to fail
• Learn - don't make the same mistake twice
• Adapt - grow with the experience

• Have fun together

• Take the time to get to know and understand each other better
• Don't take yourself too seriously and keep it light-hearted
• Fun should be coming from a place of love and respect, * 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.

If you join us as an independent contractor, you're only entitled to the first five benefits of this list.

• Node.js with TypeScript, running in Docker containers
• MongoDB and Redis
• ethers.js for blockchain communication
• GitHub, Kubernetes, AWS, Cloudflare for our GitOps CD pipeline, * Must be located in the EMEA region
• Strong professional experience with TypeScript and Node.js
• Extensive experience working as a senior backend engineer on production systems
• Proven ability to design and maintain high-quality APIs
• Practical 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 required
• Solid understanding of document databases and caching systems (e.g. MongoDB, Redis)
• Experience with backend architecture and system design in distributed environments
• Deep knowledge of testing principles and backend testing frameworks
• Strong communication and collaboration skills in cross-functional teams
• Proactive, self-directed, and comfortable taking ownership of backend domains
• Ability to write maintainable, scalable, production-grade code
• Very strong written and spoken English
• Bachelor's or Master's degree in Computer Science is a plus

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.