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.

Setting yourself up for success

• Take a moment to read the job description before applying. We want to make sure this role is the right fit for you, so you don't spend time on an application that isn’t aligned with your experience. If this one doesn't quite match, we encourage you to submit your resume to our talent pool!

• 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 career@li.finance.

• 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!

Jumper is crypto’s everything-exchange powered by LI.FI. By building on the sophisticated cross-chain infrastructure of LI.FI, we offer a comprehensive multi-chain experience for any and every person in crypto to move and use their funds across chains as easily and flexibly as they desire.

Our vision? We want to make multi-chain DeFi easy and fun!

While we live under LI.FI’s umbrella, we pride ourselves in our small but excellent and very agile team. Jumper already has over 150k active users, and still we are only now getting started to build it from the ground up - as an independent spin-off. As a Full-Stack Engineer, you would be at the core of this new adventure - completely owning the realization of Jumper’s underlying infrastructure and bringing new ideas to life!

A quick run-down of the job

We are looking for a Mid/Senior Full-Stack Engineer who will co-lead the design, development, and maintenance of the Jumper apps. In this role, you are expected to split your work between frontend and backend, with an emphasis on frontend. We are a small team, and every one of our engineers is expected to strongly contribute to Jumper’s success by coming up with independent ideas and solutions to complex challenges.

Our current stack:

• Node.js running TypeScript code in Docker containers

• NextJS

• PostgreSQL and Redis

• Github, Kubernetes, GCP and CloudFlare for our GitOps CD chain

• Viem and Wagmi

Please note: You must be located in the EMEA region. Your application will not be considered if you're outside EMEA.

What you’ll do

• Architecting and implementing scalable and robust infrastructure solutions that can handle growing user loads and evolving business needs (we are already used by over 150k monthly active users).

• Developing and maintaining comprehensive test suites, including unit tests, integration tests, and end-to-end tests

• Design and develop high quality frontend applications that are testable and maintainable

• Be responsible for development of prototypes, new frontend features and React components

• Leading the design, development, and maintenance of a newly developed Jumper backend system and APIs

• Collaborate closely with the Software Engineers, Product Manager and Designers within your team

What makes a good candidate

• Must be located in the EMEA region

• At least 3/4 years of working experience, including 1/2 years focusing on frontend work using React/Next.js

• Effective communication skills (in English) with the ability to build relationships and work in a small but excellent team while self-guided on a day-to-day basis

• Experience in UX/UI development

• Experience in software design and architecture

• Knowledge of testing framewo