SENIOR BACK END FULL STACK ENGINEER

Svitla Systems Inc. is looking for a Senior Back End Full Stack Engineer for a full-time position (40 hours per week) in Ukraine. Our client is a company that delivers AI-powered decisions, enabling intelligent and dynamic shipping and cargo insurance by providing a supply chain of custody through its IoT shipping solutions.Requirements5-7 years of experience in professional backend development.3–4 years of hands-on experience with Node.js (Express, Nest.js, or similar).Proven experience designing, building, and deploying production-grade backend systems.Experience collaborating with cross-functional teams (Frontend, DevOps, Product, QA).Strong ownership of assigned services and ability to deliver high-quality solutions independently.Advanced knowledge of such frameworks as Express.js, Nest.js, Fastify, and Koa.Strong understanding of JavaScript/TypeScript for Node.js development.Good understanding of async/await, Promises, and event-driven architecture.Solid experience with relational databases (MySQL, PostgreSQL, Supabase).Familiarity with NoSQL databases (MongoDB, Redis).Expertise in database schema design, indexing, and query optimization.Experience using ORMs (Sequelize, TypeORM, Prisma).Understanding of caching mechanisms (Redis, Memcached).Knowledge of database migrations, versioning, and transaction management.Experience designing and building RESTful APIs following best practices.Working knowledge of GraphQL (schema design, resolvers, Apollo Server).Understanding of authentication (JWT, OAuth 2.0) and API rate limiting.Familiarity with API documentation tools (Swagger/OpenAPI, Postman).Hands-on experience with message queues (RabbitMQ, Redis Queue, Bull, AWS SQS).Familiarity with background job processing and schedulers (Node.js workers, CRON jobs).Understanding of microservices and inter-service communication.Experience with WebSockets or real-time features (Socket.io, WebRTC).Familiarity with unit and integration testing (Jest, Mocha, PHPUnit).Understanding of Docker and containerized deployment workflows.Knowledge ofGit and branching strategies (GitFlow, trunk-based).Solid understanding of backend security fundamentals (SQL injection, XSS, CSRF prevention).Experience implementing authentication and role-based access control (RBAC).Knowledge of HTTPS, SSL/TLS, and encryption practices.Experience with performance optimization, scaling strategies, and load balancing.Familiarity with Azure and Supabase environments.Experience working with CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI).Basic understanding of Linux/Unix environments and server management.Experience using monitoring tools (Datadog, CloudWatch, New Relic).Familiarity with logging and error tracking (Sentry, ELK stack).Excellent analytical and problem-solving skills.Strong written and verbal communication skills.Ability to work effectively in a distributed, collaborative environmentProactive, detail-oriented, and focused on code quality and reliability.Nice to haveFamiliarity with PHP/Laravel (Eloquent ORM, Artisan, Middleware, Service Providers).Experience with serverless platforms (AWS Lambda, Google Cloud Functions).Familiarity with event-driven architecture and message streaming (Kafka, SQS).Understanding of SOLID principles and common design patterns.Exposure to microservices deployment, and monorepo management.Knowledge of GDPR and security/compliance considerations.Experience with performance profiling and optimization tools.Contributions to open-source projects or published technical writing.ResponsibilitiesWrite clean, efficient, and well-tested backend code in Node.js (JavaScript/TypeScript).Design and maintain RESTful APIs and GraphQL endpoints.Develop and optimize database schemas (MySQL, PostgreSQL).Implement core business logic, data processing, and background work.Integrate with third-party services (cloud APIs, payment gateways, analytics, etc.).Troubleshoot and resolve production issues, performance bottlenecks, and scaling challenges.Collaborate with DevOps and frontend engineers during the full SDLC.Contribute to sprint planning and ensure timely, high-quality deliverables.We offerUS and EU projects based on advanced technologies.Competitive compensation based on skills and experience.Regular performance appraisals to support your growth.Flexibility in workspace, either remote or in one of our development offices.Comprehensive medical insurance, including dental and massages.Personalized learning program tailored to your interests and skill development.Sport reimbursement program for onsite and online activities.Bonuses for recommendations of new employees.Bonuses for article writing, public talks, and other activities.20 vacation days, 10 national holidays and 5 sick leaves.Maternity leave policy and family days off.Free tech webinars and meetups organized by Svitla.Welcome and anniversary presents, gifts for children, and more.Regular corporate events and meetups.Awesome team, friendly and supportive community!