Mid-Level Backend Developer (Crypto & Payments)

Project/Client: financial services

Duration: 12 months

Location: remote (EU) 

Start date: ASAP

Rate: 25-30 eur/h

Role Overview:

We are looking for a Mid-Level Backend Developer to join our team, focusing on the core of our crypto processing and payment gateway services. You will be responsible for developing and maintaining the microservices that handle all blockchain interactions and financial transactions.

Key Responsibilities:

• Design, develop, and maintain high-performance, scalable backend services in TypeScript on Node.js using the Fastify framework.
• Implement secure logic for transaction processing, wallet management, and payment routing within a microservices architecture.
• Model and manage data using TypeORM with PostgreSQL.
• Write unit and functional tests with Jest to ensure quality and reliability.
• Integrate with third-party payment services and existing internal services.
• Plan and maintain internal ledger and self-custody solutions.
• Apply microservices best practices to both new and existing services.

Requirements:

• Strong proficiency in TypeScript, Node.js, and Fastify.
• Solid experience with PostgreSQL and TypeORM (or similar ORM).
• Proven experience building and consuming REST APIs in a distributed microservices environment.
• Experience with secure transaction workflows, payment integrations, or similar financial systems.
• Demonstrable experience in blockchain technology, such as working with cryptocurrency nodes or payment gateways.
• Strong testing mindset with hands-on experience using Jest or similar frameworks.