Backend Developer (Node.js/Nest.js)

Backend Developer (Node.js/Nest.js) Join ZEXTER as a Backend Developer and build reliable, high-load iGaming systems with Node.js, NestJS, and modern cloud technologies in a fully remote team! 🚀 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. Department Technology Role Backend Developer Locations Limassol, Cyprus, Tbilisi, Poland, Warsaw, Belgrade , Yerevan Remote status Fully Remote Applicant tracking system by Teamtailor