Senior Engineer - Payment & Wallet

We are looking for a Senior Engineer to join our Payments & Wallet team (also known as PAW 🐾) — the core group handling asset management, compliance, and On-chain Services & Integrations (Superwallet) at Coinhako.

In this role, you will be responsible for designing, developing, and maintaining high-performance services that power our payments and wallet infrastructure. You’ll collaborate with cross-functional teams to ensure seamless integration across systems, optimize transaction workflows, and enhance platform reliability and scalability.

What you'll be doing:

• Architect and build scalable backend services. Our tech stack is Rails 7, Go, Sidekiq, REST, AWS, Docker;

• Design and build high-volume APIs used by our frontends and external traders;

• Take initiative to ensure the long-term quality of the code and drive decisions related to the architecture of production systems;

• Manage and maintain custody solutions for digital assets. Ensure the highest level of security and compliance in handling and storing digital assets, including cryptocurrencies, toke