Senior Back End Developer (SSO)

As a Senior Back End Developer, you will design and implement authentication services, build integrations with external providers, and contribute to platform-level architecture decisions. You will work with high-load systems, distributed architectures, and modern backend technologies while collaborating with a strong engineering team.

Key Responsibilities

• Design and develop product features with a focus on SSO and backend services.
• Build integrations with third-party financial and technical providers.
• Develop public-facing web services and internal microservices.
• Participate in platform-level decision-making regarding technology and practices.
• Ensure reliability, scalability, and performance of backend services.
• Follow best engineering practices and share knowledge within the team.

Requirements

• 5+ years of commercial development experience with Node.js.
• 3+ year of experience with NestJS (or willingness to dive in quickly).
• Experience building REST API and/or GraphQL using NestJS.
• Strong proficiency in TypeScript.
• Hands-on experience with MongoDB, MySQL, or PostgreSQL.
• Experience integrating third-party APIs/services (sports feeds, payments, etc.).
• Experience with message queues (RabbitMQ, Kafka, or similar).
• Understanding of distributed systems architecture.
• Experience with Redis for caching and Pub/Sub (preferably).

Nice-to-Have

• Experience with high-load systems (especially real-time data).
• Background in writing automated tests (Unit, Integration, E2E).
• Knowledge of WebSocket, gRPC, or other real-time technologies.
• Familiarity with CQRS, Event Sourcing, DDD patterns.
• Experience deploying apps in Docker/Kubernetes/CI/CD environments.
• Background in the gambling/betting industry (a strong plus).

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.