Backend Developer (Node.js/Nest.js)

Zexter is an ambitious product company building its own technological ecosystem in the iGaming industry. They develop a proprietary platform that is live and actively operating, continuously expanding their product portfolio to adapt quickly to market demands and introduce new innovations. Requirements: — 4+ years of commercial backend development experience with Node.js and TypeScript. — 4+ 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, and identifying and resolving database performance bottlenecks. — 3+ 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 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 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. iGaming Experience: — Commercial 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. — Ability to investigate and resolve discrepancies in financial data, transactions, and provider integrations. — Strong understanding of reliability, security, and data consistency requirements of production iGaming systems. Nice to Have: — Practical experience using AI-powered developer assistants (Cursor, Claude, or similar). — Experience with Redis, message queues, background jobs, and event-driven architecture. — Experience with Docker, Kubernetes, CI/CD pipelines, and cloud infrastructure. Conditions: — Work format: Fully remote. — Compensation: Negotiable based on experience. — Growth: Opportunity to work with a modern technology stack, a strong engineering team, minimal bureaucracy, and AI-powered development tools that help eliminate routine work.