Senior Node.js Developer

Компания "Uspio LTD"

We build backend systems with a strong focus on reliability, correctness, and observability. Our engineering culture emphasizes strict quality standards, automation, and clean architecture from day one.

Responsibilities:

• 100% test coverage enforced, mutation testing, strict linting and compilator settings for maximum type safety
• Automated git hooks, CI/CD with review-environments
• Explicit function return types, exhaustive switch checks, functional patterns
• CLI tools, health checks, metrics, structured logging
• Prometheus metrics and Loki logs in Grafana, alerting in Slack

Requirements:

• Professional Node.js/TypeScript experience with complex backend systems
• Deep understanding of TypeScript's type system and best practices (we use @tsconfig/strictest preset)
• Ability to write highly reliable code and robust unit- and integration tests
• Experience with NestJS or similar DI-based frameworks
• SQL databases and transactions, ORM (we use TypeORM)
• Message queue experience (RabbitMQ, Kafka, or similar)
• SOLID/GRASP principles, GoF/enterprise patterns
• OO-design
• Strong knowledge of TCP/IP stack
• Familiarity with OWASP Top 10, security best practices
• Written English level B2 and above

Will be plus

• Telecommunications or messaging platform experience (SMPP protocol, WhatsApp, Telegram, GSM7, UCS2 data codings)
• Node.js profiling
• TCP-based protocol implementation and data encoding knowledge
• Docker
• DDD
• Familiarity with DevOps (k8s, helm, werf)
• Functional programming patterns (Result types, Option types, monads)
• Zod or similar inferred schema validation libraries
• Active Github account

What we offer:

• Remote work
• Flexible start of the day
• Paid leave of 21 days