Your responsibilities, 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

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

What we offer, Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas, Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market, We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022, Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more, Comfortable workplace – class A offices or remote work, Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application, PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers, Investment in your growth – meetups, webinars, training platform and technology blog – you choose, Fantastic atmosphere created by all Sii Power People

Recruitment stages, Send your CV, Talk to us about your expectations, Learn more about our projects and choose the best, Start your adventure with Sii!

Sii Sp. z o.o., Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment., , Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work,

About the project

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.

About the project

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 responsibilities

• 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

Recruitment stages

• Send your CV
• Talk to us about your expectations
• Learn more about our projects and choose the best
• Start your adventure with Sii!

Recruitment stages, Send your CV, Talk to us about your expectations, Learn more about our projects and choose the best, Start your adventure with Sii!

Sii Sp. z o.o., Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment., , Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work,

About the project

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.