Senior Backend Engineer (multiple roles)

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.

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• Focus on your application, there's no need to reach out to team members directly. We review all applications thoroughly, so rest assured your submission will be carefully considered! If you have questions about which role might be the best fit for you, feel free to reach out to [email protected].

• To apply, please submit your resume detailing your relevant experiences and competencies. We love to see how your work has made a difference—whether it’s improving processes, increasing efficiency, or leading a project to success, so be sure to highlight this in your resume!

We are looking for multiple Senior Backend Engineers 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 frontend developers, product managers, and designers, to deliver high-quality software solutions that drive our success. The position will report to our Backend Lead.

• 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 region and have technical understanding of blockchain. Your application will not be considered otherwise.

• 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, conduct 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

• Analyzing 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 region

• Strong TypeScript experience is a must

• Previous working experience in the blockchain space, technical understanding of the EVM ecosystem (or other ecosystems) is a must

• Extensive professional experience in a similar role (as senior or lead)

• 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

• Experience with smart contract development is a plus

• Proficiency in Golang is a plus

We encourage you to apply if you feel your experience and skills equip you for this job but are not listed here!

• Embracing the differences

  • 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)

• 1 Conference per year near your city of residence

• 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.

Setting 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!