Fullstack Web Developer, IoT

Heatmanager GmbH

Fullstack Web-Developer responsible for developing IoT solutions for energy optimization in buildings. Collaborating with the team to enhance the Smart Heating solution HEATMANAGER.

Posted 4/12/2026full-timeFrankfurt am Main • 🇩🇪 GermanyMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

IoTJavaScriptNext.jsReactSQL

About the role

Key responsibilities & impact

You are at the heart of operations and the further development of our smart heating solution HEATMANAGER, implementing projects directly with the team.
The core of your role is direct development on the platform.
You implement projects and independently develop additional features.
You support and coordinate customer projects together with our team.
You will be part of our agile development team and work directly with our CTO.
You implement components for controlling smart thermostats in our customers' buildings.
You work with modern frameworks and technologies.

Requirements

What you’ll need

Interest in IoT and sustainable technologies
You are proficient in JavaScript, React, Next.js, SQL and ideally ThingsBoard
Networking knowledge (LoRaWAN) is not a must-have but is helpful
Independent, solution-oriented working style and analytical skills
Good German and English language skills

Benefits

Comp & perks

Flexible working hours that allow an optimal balance with studies and free time
Work on future-oriented cloud and IoT products with real impact
High technical freedom in choosing modern frameworks & tools
Close collaboration with cloud, data and hardware experts
Modern development infrastructure
Flexible work models for focused and creative work
Opportunity to actively shape frontend standards and UI/UX guidelines
Modern workplace with a company laptop at the TechQuartier in Frankfurt, free snacks and beverages
Family-like work atmosphere, regular BBQs and team events

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaScriptReactNext.jsSQLThingsBoardIoTnetworkingLoRaWAN

Soft Skills

independent workingsolution-orientedanalytical skills