Our Mobile Team is focused to deliver the highest quality iOS and Android applications. We build native  applications that meet industry standards and compete with global players in the home automation area.  Our Customers are technicians that use our solutions to commission and configure new heating systems.  Our products aims to bring more comfort to daily life by managing the heating system in an easy and  smart way. 

Very well

  • Analysis of project requirements in terms of the testing process. 
  • Support in defining Acceptance Criteria and subsequent verification of their implementation. 
  • Estimation of the time, complexity and dependencies of project tasks. 
  • Design and execution of test cases using test management tools. 
  • Performing functional and non-functional tests. 
  • Coordinating the testing process at each project stage. 
  • Creating test documentation (Test Plan, Test Report, User Manual, etc.). 
  • Ensuring software quality by applying good practices and processes. 
  • Signaling risks within the scope of performed tasks to the project leader/project manager. 

  • Minimum 3 years of experience in application testing. 
  • Practical knowledge of functional tests (Integration, UI, Regression, Smoke, 
  • Exploratory, System) and non-functional tests (Compatibility). 
  • Knowledge of JIRA, Confluence.
  • Knowledge of test management tools. 
  • Knowledge of CI tools (TeamCity, Jenkins). 
  • English language - communicative in speech and writing. 
  • Attention to detail. 
  • Communication skills. 
  • Knowledge of test automation using Swift and Kotlin and ISTQB Certificate is a plus. 
  • Knowledge about embedded system specifics in the context of software testing Knowledge of version  control systems (i.e. Git) 
  • Good English, written and spoken

Packages and extras

  • Healthcare package
  • Healthcare package for families
  • Leisure package
  • Leisure package for families
  • Language courses
  • Conferences
  • Trainings
  • Books
  • Financial bonus


  • Cold beverages
  • Hot beverages
  • Fruits
  • Snacks
  • Integration events
  • Chill room
  • Lunches
  • Car parking
  • Bicycle parking

We are a family business, 100% managed by the Viessmann family.

We work with the mission of changing the world for the better in the face of climate change.

We contribute to the success of Viessmann, we develop proprietary software.

Our applications are market leaders in optimizing energy consumption in homes around the world. We make use of solely modern technologies.

Our applications are dedicated to: 

  • the B2B market for Installers and Service Technicians - enabling remote configuration of Viessmann devices and facilitating the automation of the installation process.
  • the B2C market for End Customers - enabling remote management of Viessmann devices in the home environment (heating - boilers and heat pumps, ventilation, air purifiers, PV systems, power solutions electric cars).

Facts about us:

  • +390 employees
  • over 10 years of experience on the IT market
  • family atmosphere (not a slogan, see for yourself)
  • the app store rating of our apps at 4.7  

Why our R&D Viessmann Center is right place for you?

  • We are our own client - each release is a wonderful feeling.
  • We have a real influence on the choice of technologies we use. All you need to do is to properly justify your choice, and the company will allow you to show yourself off technologically.
  • We care for the environment and a healthy lifestyle - this is what we speak out loud about in our country.