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Senior Backend Engineer

Lead the design, development, and maintenance of LI.FI's backend systems

type of job


updated at

7 months ago

job details

Role Overview

We are looking for a Senior Backend Engineer who will lead the design, development, and maintenance of our backend systems, ensuring they are robust, scalable, and secure.

You'll collaborate closely with cross-functional teams, including front-end developers, product managers, and designers, to deliver high-quality software solutions that drive our success. The position will report to our Backend Lead.

The current tech stack of LI.FI utilizes:

  • Node.js running TypeScript code in Docker containers
  • MongoDB and Redis for our data
  • ethers.js for communication with the blockchains
  • Github, Kubernetes, AWS, and CloudFlare for our GitOps CD chain

Please note: You must be located in the EMEA timezone and have working experience in the blockchain/crypto industry. Your application will not be considered if you are outside of this time zone.

Key Tasks

  • Leading and actively participating in the design, development, and maintenance of backend systems and APIs
  • Architecting and implementing scalable and robust backend solutions that can handle growing user loads and evolving business needs
  • Maintaining high coding standards, conducting code reviews, and ensuring best practices for code maintainability and readability
  • Identifying bottlenecks and optimizing code and algorithms to improve system performance
  • Implementing monitoring and debugging tools to proactively identify and resolve issues, ensuring high system availability
  • Developing and maintaining comprehensive test suites, including unit tests, integration tests, and end-to-end tests, to ensure the reliability of backend systems
  • Providing guidance and mentorship to junior developers, helping them grow their technical skills
  • Analyze complex technical problems and propose effective solutions to address them
  • Documenting code, APIs, and technical processes to facilitate knowledge sharing within the team and support onboarding of new developers


  • Must be located in the EMEA timezone
  • Strong TypeScript experience is a must
  • Previous working experience in the blockchain space, technical understanding of the EVM ecosystem (or other ecosystems)
  • Extensive professional experience in a similar role
  • Understanding of Document Databases and Caching
  • Experience in software design and architecture
  • Deep knowledge of testing frameworks and principles
  • Strong communication, collaboration, problem-solving, and analytical skills
  • Proactivity, strong ability to work well within a team and to be self-guided on a day-to-day basis
  • Ability to write maintainable, scalable, production-grade code
  • Passion for new technologies and ability to autonomously evaluate them and make suggestions for improvement
  • Very strong verbal and writing skills in English to allow effective communication with team members and stakeholders in meetings and documents
  • Bachelor's or Master's degree in Computer Science is a plus
  • Some experience with smart contract development would be a plus

Culture & Perks

  • Empowered teams

We take the best person with the right skills, then inspire them to use them! We trust our team and give them the space and ownership to excel and achieve

  • Flexible time management

We believe work should adapt to your life, not the other way around. We only schedule a few fixed meetings every week – you're free to arrange the rest of your time as you like

  • Inclusive culture

It’s our priority to make our whole team feel included, appreciated, and respected. Our global, culturally diverse team is our most important asset

  • Remote-friendly

We're Berlin-based, with a truly global team. Remote is the new normal, and we care about our team's work-life balance


  • Entitlement to work computer (choice of equipment)
  • Annual team offsites (Thailand was a blast at the beginning of 2023)
  • Unlimited remote days
  • Flexible working hours
  • An annual 1000€ personal development budget once the probation period ends (pro-rated the first year)
  • A one-time 1000€ remote budget to use on coworking, office setup, etc

About Us

LI.FI is a cross-chain liquidity aggregation protocol and is building a crucial infrastructure piece for the mass adoption of blockchains.

Abstracting away DeFi and making it available as API and widget to the dapplication layer, empowers developers to focus on what is truly important: building value bringing, decentralized applications for the consumer. LI.FI allows limitless, cross-chain any-to-any swaps from anywhere, directly into the dapps.

We are a passionate young team on a mission to enable a fairer, more decentralized world. To do so we are building a crucial piece of cross-chain infrastructure to enable multiple blockchains to coexist and serve different needs.

Apart from the tech we care a lot about user experience and aim to make complex technologies accessible for everyone.


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LI.FI builds a multi-chain DeFi middleware for the application layer