Back-End Developer (Go) - Krakow

Requirements: 5+ years of experience with Golang in a production environment; 5+ years of experience working with relational databases (RDBMS) such as PostgreSQL or MySQL; Demonstrated expertise in designing and developing RESTful APIs; Strong analytical and problem-solving skills, with a proactive and adaptable mindset; Proficiency in AI development environments (e.g., Cursor, Claude Code) and expertise in AI development techniques, such as Spec-Driven Development, are required; Fluent in English. Nice to have: Experience developing or maintaining IoT platforms or connected device ecosystems; Knowledge of IoT protocols such as MQTT, CoAP, or WebSockets for efficient communication; Familiarity with Matter and Thread protocols, including their architecture, security, and implementation considerations; Understanding of device provisioning, firmware over-the-air (OTA) updates, and device lifecycle management; Exposure to edge computing paradigms and cloud-to-device integration patterns; Proficiency in asynchronous programming and event-driven systems; Experience with telemetry data collection, real-time data processing, and time-series data stores; Working knowledge of IoT security best practices, including authentication, encryption, and secure communication; Familiar with Debian/Ubuntu, Linux application/service development, and CLI environment; Familiar with Linux networking stack, routing, packet analysis (tcpdump/Wireshark), and firewall management. Benefits: International work environment and work with global development teams; Ability to deliver software that is used by millions of people across the globe; Opportunity to leverage and integrate modern AI tools into product development; Access to all Ubiquiti products; Private Medical insurance (UoP only); Hybrid approach - office in Krakow; Flexible work hours; Compensation package matching global standards, including competitive salary depending on your qualification and background; UoP : 22,000–28,000 PLN gross monthly; B2B: $6,000–$8,500 USD gross monthly; A-class office with all the necessities - snacks, drinks, free parking, etc!