The Embedded Competency Center is an organizational unit of Sii, that brings together almost 500 specialists. We are currently looking for a Golang Developer. You will design, develop, and maintain the core backend infrastructure that powers the entire platform, working closely with cross-functional teams to deliver robust, scalable solutions.Your tasks Design, enhance, and support connectivity solutions that integrate various communication protocols such as MQTT, OPC, REST, Kafka, and more Develop and operate systems for reliable data acquisition, transformation, analysis, and processing across heterogeneous sources Build and maintain core platform services, including OPC UA Server features, data calculation pipelines, and historical/trending data modules Implement extensible components enabling user-defined scripts, SQL execution, workflow automation, and customizable rule chains Develop notification and messaging capabilities, including email, SMS, Slack, Google Chat, and other communication channels, ensuring consistent and timely delivery Contribute to security features such as TOTP and other authentication and protection mechanisms to safeguard the platform and user data Participate in architectural discussions, feature scoping, and technical design, taking ownership of complex functionalities from concept to implementation Collaborate closely with frontend, QA, and product teams while providing support, troubleshooting, and continuous improvements for deployed services Requirements At least 4 years of backend development experience, including work on large-scale, multi-service backend systems Proficient in Go as the primary language, with additional skills in C/C++, Python, SQL, and Linux/Windows Skilled in containerised development using Docker Solid understanding of distributed architectures and practical work with microservices Practical experience with event-driven systems, messaging tools, and asynchronous communication Understanding of industrial communication standards such as OPC UA, MQTT, and similar protocols Expertise in database schema design, optimisation, and efficient data handling Solid skills in building and maintaining APIs using REST and gRPC English at an advanced level Residing in Poland required