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.

A quick run-down of the job

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.

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 or APAC regions and have technical understanding of blockchain. Your application will not be considered otherwise.

What you'll do

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

What makes a good candidate

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 nice to have.
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

Company culture

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

What you’ll get

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.

Application process

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!

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Senior Backend Engineer