Senior Frontend Developer

STON.fi is a decentralized exchange (DEX) built on TON Blockchain smart contracts, enhanced with advantages such as low fees, low slippage, super user-friendly interface and direct integration with the TON wallet.

STON.fi:

• implements one of the main features of cryptocurrencies — it facilitates financial transactions without any involvement of banks, brokers or any other traditional intermediaries;

• utilizes the TON blockchain and is a natural part of TON DeFi’s growing suite of tools that make a huge range of financial services available directly from the TON cryptocurrency wallet.

We are looking for a new frontend team member who will be immersed in the process of working with TON Blockchain and its unique features; will help the present team in bringing new complicated business scenarios to life and upgrading the current application. That is a very interesting role because you will deal with new standards of the blockchain that emerge every month while developing the app that is already live and has a very big userbase - so naturally there are a lot of challenges for engineers to jump into.

What you’ll do:

• Immerse in the context of business requirements and operation of the application scenarios; communicate in an open community of users and partner developers.

• Produce typescript code that is easy to read, testable, supported, and framework independent.

• Be responsible for a critical functionality that influences people a lot.

• Build interfaces with mobile first approach and accurately following the design requirements.

• Write unit test using vitest, e2e and integration tests using cypress.

• Optimize application performance: deal with profiling, analysis and reduction of problem spots, refactoring.

Requirements:

• Strong knowledge of javascript (ES6+), typescript.

• Ability to make adaptive interfaces using css/sass.

• Expertise with the react framework and its ecosystem.

• Location that is close to CET timezone, as that's where most of the team is and most of the work is getting done.

Bonus Skills:

• Experience with frameworks other than React.

• Expertise with themization and localization implementation;

• Experience in developing and supporting CI/CD workflows with gitlab and docker as well as maintaining versioned application releases.

Our stack:

• Frontend

  • react@18 (react@19 migration in plans)

  • react-router (currently - library mode. framework mode or @tanstack/router migration in plans)

  • @tanstack/react-query

  • @tonconnect/ui

  • @radix-ui

  • tailwindcss

• Toolchain

  • pnpm

  • tsup / vite (depends on package scale)

  • vitest

  • biome (formatter only)

  • eslint 

If you feel that’s a role for you - fill in the application and let’s meet!