Senior Backend Engineer w Kraków, Polska

• Experience: 5+ years of commercial experience in backend software development.
• Domain Exposure: Experience or a strong interest in building scalable IoT applications and handling real-time data streams.
• PHP & Frameworks: Excellent knowledge of the latest PHP versions (8.x) and the modern Symfony (versions 7+) ecosystem.
• Soft Skills & Mindset: High level of self-sufficiency and full accountability for the delivered solutions. We are looking for an engaged professional who can independently analyze a problem, propose an optimal solution, and drive tasks to completion.
• Patterns & Methodologies: Strong command of design patterns, SOLID, DRY, KISS principles, Clean Code approach, and TDD (Test-Driven Development).
• Workflow & Tools: Experience working in a product team delivering tasks within the Kanban methodology using Jira.
• Databases & Architecture: Proficiency in MySQL and PostgreSQL environments; practical experience with microservices-based architecture.
• Queues & Messaging: Experience with RabbitMQ or pub/sub systems (knowledge of NATS is a plus).
• Containerization & Ecosystem: Everyday work with Docker, CI/CD (Jenkins), and a good command of Linux.
• Observability: Knowledge of or willingness to work with the LGTM stack (Loki, Grafana, Tempo, Mimir) for application monitoring and logging.

✨ Nice to have

• Golang: If you already know the basics of Go – great! If not, but you have a solid backend foundation, are highly self-sufficient, and want to write in Go – this is the perfect role for you. You will learn Go best practices directly from senior developers.
• GIS Systems: Experience with GIS (Geographic Information Systems), spatial databases (e.g., PostGIS), or processing geospatial data is a significant advantage.

We are looking for an experienced Backend Developer who feels confident in the world of advanced PHP and distributed architecture, and at the same time wants to take the next big step in their career – seamlessly transitioning into the world of Golang.

Our system processes massive volumes of real-time data within the IoT domain. We are currently facing an exciting technological challenge: migrating core domains from PHP (Symfony) to high-performance microservices in Go. By joining us, you will not only ensure clean, pattern-driven code but also gain a unique opportunity for a professional career transformation towards becoming a Go Developer under the guidance of experienced engineers.

Product

We build INFRAPORT which is a data-driven SaaS platform for water utilities worldwide. Our solutions help reduce water loss through leak detection and measurement technologies, combining IoT data, geospatial systems (maps), and advanced analytics.

,[ Independently develop and maintain current IoT systems based on PHP 8 and Symfony 7+ while adhering to the highest code quality standards. , Take full end-to-end ownership of assigned modules, features, and geospatial/IoT data processors. , Work within a transparent project process based on Kanban boards in Jira. , Design scalable, distributed microservices architecture using NATS/RabbitMQ. , Write unit and integration tests to ensure system stability. , Actively participate in rewriting and optimizing services into Golang under the guidance of mentors. , Monitor performance and ensure application reliability using the LGTM stack.] Requirements: Git, PHP, Symfony, Docker, Elasticsearch, PostgreSQL, Go Tools: Jira, Confluence, Bitbucket, GIT, Jenkins, Agile. Additionally: Private healthcare, Training budget, Flat structure, Small teams, International projects, Free coffee, Playroom, Free snacks, Modern office, Startup atmosphere, No dress code.