Senior Back End Developer (Anti-Fraud)

As a Senior Back End Developer, you will design and implement anti-fraud features, build integrations with third-party financial services, and develop high-performance APIs and microservices. You will also contribute to platform-level technical decisions and help strengthen engineering culture within the team.

Key Responsibilities

• Design and develop product features for anti-fraud systems.
• Build integrations with third-party financial and technical providers.
• Develop public-facing payment services and internal microservices.
• Participate in platform-level decision-making on technologies and practices.
• Promote and follow best engineering culture and share knowledge with the team.

Requirements

• 5+ years of commercial development experience with Node.js and Express.js.
• Strong expertise in MongoDB and MySQL (PostgreSQL optional).
• Experience with Redis (optional).
• Experience with message queues (RabbitMQ).
• Hands-on experience integrating third-party services and building APIs.
• Understanding of distributed systems architecture.

Nice-to-Have

• Experience with TypeScript and NestJS.
• Background in writing automated tests (Unit, Integration, E2E).
• Experience with high-load systems.
• Strong understanding and application of OOP, SOLID, DRY, KISS principles.

What We Offer

• Competitive salary based on experience and skills.
• Flexible working schedule (remote/hybrid).
• 17 paid vacation days and 14 paid sick leave.
• Mentorship and clear career growth.
• Access to courses, certifications, and conferences.
• Collaborative team and knowledge-sharing environment.
• International projects with modern tech stack.