Senior Typescript Engineer (Coin Integration) - FinTech / Crypto

Hey! Nice to see you!

At Incubly, we believe that great people want to work with great people, so we started to build a company that will attract great minds and that we can achieve everything not by feeling that we work, but just having fun. Our mission is to mainly support tech companies and startups (scaleups) in fast and high-quality scale-up of their teams and boost their product development, testing, and deployment; so, we can succeed together.

We are currently working with a French company which is a leader in security and infrastructure solutions for cryptocurrencies and blockchain applications. It has a team of more than 400 professionals developing a variety of products and services to safeguard cryptocurrency assets, including worldwide leading hardware wallets.

In this role you will help develop and evolve Ledger Live, collaborating closely with cross-functional teams to deliver reliable, secure, and seamless experiences across web and mobile platforms, while continuously growing, challenging yourself, and shaping the future of digital asset security

Your daily responsibilities

• Contribute within a modern AI-enabled engineering workflow utilising tools such as Claude Code, Cursor, and Gemini
• Work within the Ledger Blockchain Integration Team to enhance and expand Ledger Live’s blockchain integration coverage
• Apply expertise in JavaScript and TypeScript to solve complex technical problems and ensure smooth, reliable blockchain integrations for end users
• Utilize modern JavaScript practices, state management, asynchronous handling, and API/library management to improve integration workflows
• Collaborate with cross-functional teams and external partners to optimize blockchain integration architecture
• Implement functional programming approaches to maintain a clean, side-effect-limited codebase
• Contribute to scaling and improving testing strategies to ensure high-quality, reliable integrations

We need you to have

• A passion for coding and deep interest in the TypeScript ecosystem
• A service-oriented mindset with a commitment to delivering high-quality solutions
• Familiarity with Web3 integration libraries such as Ethers.js
• Basic understanding of blockchain architecture
• Interest in or initial experience with functional programming (in JavaScript or any FP language)
• Curiosity about decentralized systems and emerging blockchain technologies
• Professional fluency in English

Would be great if you have

• Experience with React and modern frontend development
• Experience developing DApps or Web3 wallet software

Our offer

In addition to great company and challenging projects, we can offer much much more, i.e.

• Agile and friendly atmosphere, non-violent communication, and full respect for diversity
• Possibility to choose from onsite (in Lodz, Poland) or hybrid work (2-3 days a week in our office in Łódź city centre). Business trips to Paris as needed, typically once every three months
• Remuneration on B2B: 1300- 1500 zł net/ MD