Heating and HVAC IoT Applications Development

The Story

FiftyFive Technologies partnered with the client to deliver a full-cycle digital ecosystem of mobile and web applications for homeowners, technicians, and administrators. The engagement involved custom software development, IoT integration, cloud deployment, and automated QA. A dedicated team of engineers, testers, and DevOps specialists worked in Agile sprints to ensure scalability, reliability, and global usability.

The client is a Sweden-based global leader in heating and HVAC IoT solutions, serving homeowners, professionals, and enterprises with advanced energy-efficient technologies across multiple international markets.

Abhay Mathur

Head of Mobile Development

The challenge

• > Cross-platform performance for iOS, Android, and web applications.

• > Presenting complex heating and IoT data in user-friendly formats.

• > Testing across multiple device brands with limited physical hardware.

• > Scaling to support 100,000+ connected devices with real-time updates.

• > Integrating with third-party APIs and smart home platforms.

• > Reducing manual testing effort while maintaining release velocity.

The solution

• > Developed native mobile apps (Swift, Kotlin) for homeowners and technicians.

• > Built web portals (React, Redux) for service partners and administrators.

• > Implemented backend with .NET Core, Node.js, and C# for scalability.

• > Used Azure IoT Hub, Service Bus, Cosmos DB, PostgreSQL, and Redis Cache for cloud infrastructure.

• > Automated UI testing with Java, Appium, and TestNG; integrated CI/CD pipelines with GitHub Actions.

• > Deployed a dedicated team: mobile developers, backend engineers, QA automation specialists, and cloud architects.

The outcome

The client achieved 40% reduction in manual testing costs, 30% faster installation and commissioning for technicians, and accelerated release cycles by two weeks per sprint. Remote monitoring improved customer satisfaction, while multilingual rollout increased adoption in over 10 countries. Scalability supported 100,000+ IoT devices with <2s latency, ensuring reliable real-time control. The project delivered measurable cost savings, enhanced operational efficiency, and positioned the client for global market growth.