Senior Backend Engineer building distributed C/C++ vector databases for VAST Data’s AI infrastructure. Optimizing high - throughput, real - time analytics across massively scalable data systems.
About the role
- Middle Full Stack Node.JS Developer for UBO Team at GR8 Tech. Designing and evolving web platforms focusing on performance, scalability, and reliability.
Responsibilities
- Design and evolve backend and frontend architecture using Node.js and JavaScript.
- Apply architectural patterns (microservices, event-driven design) based on real constraints.
- Design systems with failure in mind, using resilience patterns like circuit breakers and rate limiting.
- Build, ship, and maintain backend services and web interfaces in production.
- Deliver new features end to end — from requirements to release.
- Optimize applications for performance, scalability, and reliability.
- Ensure high code quality through reviews, testing, and clean architecture.
- Write and maintain unit, integration, and end-to-end tests.
- Improve test coverage and reliability of existing systems.
- Identify performance bottlenecks and drive optimization initiatives.
- Ensure secure coding practices and basic application security.
- Partner with product managers, designers, and engineers to deliver business outcomes.
- Translate requirements into technical solutions with clear trade-offs.
- Contribute to planning, estimation, and iterative delivery in Agile environments.
- Share technical context and documentation with the team.
- Mentor junior engineers and support technical growth within the team.
- Participate in technical discussions and continuous improvement initiatives.
- Stay current with modern JavaScript, Node.js, and web development practices.
Requirements
- 3+ years of commercial experience with Node.js and JavaScript.
- Strong knowledge of modern JavaScript (ES12+), async programming, and Node.js internals.
- Experience building RESTful APIs with NestJS, Express, Fastify, or similar frameworks.
- Solid understanding of web fundamentals: HTTP, browser rendering, SPA architecture.
- Experience with SQL databases, basic data modeling, and queries.
- Hands-on experience with testing (unit/integration) and CI/CD pipelines.
- Comfortable working independently and owning features end to end.
- Intermediate or higher level of English, fluent in Ukrainian or Russian.
- Experience with Docker and basic Kubernetes concepts.
- Familiarity with event-driven systems and message-based architectures.
- Exposure to cloud platforms (AWS preferred).
- Experience with Webpack, module federation, and bundle optimization.
- Monitoring and performance tooling (Prometheus, Grafana, ELK).
Benefits
- Paid maternity/paternity leave + monthly childcare allowance.
- 20+ vacation days, unlimited sick leave, emergency time off.
- Remote-first + tech support + coworking compensation.
- Team events (online/offline/offsite).
- Learning culture with internal courses + growth programs.
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