We are a leading provider of technology content and services for the Location Based Industry. Maintaining a diversified IP portfolio in four primary market segments: M2M Intelligence, Golf Location Solutions, Vehicle Telematics and Geo-Data Solutions. Are you looking for an innovative and cutting-edge technology company that will motivate you and support your career? Take charge of your career future at Pixels Matter and join us in our  Lviv office. POSITION OBJECTIVE: Backend Developer will be responsible for developing, maintaining, and optimizing scalable backend services using Node.js. Candidate must have 5+ years of experience in a similar position. POSITION ACCOUNTABILITIES: Design and implement RESTful APIs and GraphQL endpoints for mobile and web applications. Work with MongoDB to store and retrieve structured data efficiently. Optimize backend performance for low-latency and high-concurrency applications Implement authentication and authorization mechanisms (OAuth, JWT, API Keys). Ensure data integrity and security through encryption and best security practices. Develop and maintain AWS-based infrastructure (Lambda, EC2, S3, RDS, etc). Create and manage CI/CD pipelines for automated testing and deployments. SKILLS & QUALIFICATIONS: Proficiency in Node.js with experience in frameworks like Express.js or NestJS. Strong knowledge of MongoDB, including indexing, aggregation, and performance tuning. Experience with AWS services such as Lambda, S3, EC2, and API Gateway. Solid understanding of asynchronous programming, event-driven architecture, and WebSockets. Strong debugging and performance profiling skills in Node.js applications. Experience with Git for version control and collaborative development. NICE TO HAVE: Experience with TypeScript for scalable and maintainable backend code. Knowledge of Redis for caching and performance improvements. Familiarity with GraphQL for modern API development. Exposure to DevOps and Infrastructure as Code (Terraform, CloudFormation). Background in sports tech or IoT integrations (e.g., Bluetooth-connected golf products). COLLABORATION & WORKFLOW: Work closely with mobile and frontend developers to build seamless app experiences. Collaborate with firmware engineers to integrate backend services with IoT devices. Participate in code reviews, architectural discussions, and sprint planning. Contribute to logging, monitoring, and error-handling improvements for production stability. WHAT WE CAN OFFER YOU: Paid vacation and sick time. Public holidays. Technical equipment. Happy hours on Fridays. Company sponsored events as well as a casual work environment. SALARY COMMENSURATE WITH EXPERIENCE Powered by JazzHR