Backend Developer (Node.js/Nest.js)

🚀 Zexter is an ambitious product building its own technological ecosystem in the iGaming space.

We are developing our in-house platform , which is already live and actively operating, while also expanding our product line , allowing us to adapt quickly to market needs and implement innovations at speed.

We are looking for a Backend Developer to join our team and help us build scalable, reliable, and high-performance backend solutions for our iGaming products. You’ll work closely with other engineers and cross-functional teams, taking ownership of backend features from development to production.

Requirements

• 5+ years of commercial backend development experience with Node.js and TypeScript.

• 5+ years of hands-on production experience with PostgreSQL and other relational databases.

• Strong SQL expertise, including:

• Query optimization for high-load systems.

• Index design and performance analysis.

• Transaction management and concurrency control.

• Identifying and resolving database performance bottlenecks.

• 5+ years of commercial experience with NestJS.

• Excellent understanding of:

• Dependency Injection.

• Modular application architecture.

• Clean Architecture and software design principles.

• REST API design and backend service architecture.

• Experience developing and maintaining high-load production systems.

• Solid experience with automated testing (unit/component and integration tests).

• Experience with load and performance testing, including bottleneck identification and validating system behavior under heavy traffic.

• Experience with Redis, message queues, background jobs, and event-driven architecture.

• Experience with Docker, Kubernetes, CI/CD pipelines, and cloud infrastructure.

• Experience working on systems where financial accuracy, idempotency, transaction consistency, and auditability are critical.

• Ability to write clean, maintainable, testable, and well-structured code.

• Strong ownership mindset, taking responsibility for features from implementation and testing through deployment, monitoring, and production incident resolution.

• Strong communication skills with the ability to clearly explain technical decisions, implementation details, and associated risks.

• Ability to work effectively under deadlines and independently prioritize tasks.

• Experience with code reviews, debugging, logging, monitoring, and production incident investigation.

Nice to Have

• Experience in the iGaming industry
• Experience developing or maintaining backend systems for online casinos, sports betting, gaming platforms, wallets, payment systems, or transaction processing.
• Experience integrating third-party game providers, payment gateways, or other external services.
• Practical experience using AI-powered developer assistants (Cursor, Claude, or similar).

What We Offer

• Fully remote work.
• Opportunity to work in a fast-growing international iGaming company.
• Opportunity to work with a modern technology stack, a strong engineering team, minimal bureaucracy, and AI-powered development tools that help eliminate routine work.