Software Developer - Mobile Applications (w/m/d)

rosslight GmbH; Karlsruhe; Hybrid; EUR 65,000 - 90,000; Full time

Job summary

rosslight GmbH in Karlsruhe is seeking a Software Developer - Mobile Applications (w/m/d) to build cross-platformFlutter apps that communicate with smart devices via BLE. You design, implement, and maintain mobile code, collaborating with hardware and firmware teams to create reliable device integrations.

You bring strong Flutter expertise, a focus on clean code, and the ability to work autonomously. The role offers flexible hours and remote work options within Germany and a chance to contribute

Qualifications

• Ability to write clean, maintainable, and well-documented code.
• Strong problem-solving skills.
• Experience with Git version control.
• Ability to work independently and proactively.
• Good German Skills (C1).

Responsibilities

• Implement and optimize Bluetooth Low Energy (BLE) communication
• Design scalable and maintainable mobile architectures
• Collaborate with firmware and hardware development teams
• Debug and resolve connectivity and performance issues

Skills

Clean code

Problem solving

Git

Independent work

German (C1)

Tools

Flutter

BLE

IoT

Job description

Software Developer - Mobile Applications (w/m/d)

Join our team to develop modern cross-platform mobile applications that connect seamlessly with smart devices via Bluetooth Low Energy (BLE). You will play a key role in designing, implementing, and maintaining Flutter applications that power the next generation of connected products.

Working closely with hardware, firmware, and product teams, you will build reliable device communication, optimize user experiences, and solve real-world connectivity challenges. We are looking for a proactive developer with strong Flutter expertise, a passion for clean code, and experience integrating BLE-enabled devices.

Technical Expertise

Personal Evolution

Autonomy

Customer Relationship

Problem Solving

Responsibilities

• Implement and optimize Bluetooth Low Energy (BLE) communication
• Design scalable and maintainable mobile architectures
• Collaborate with firmware and hardware development teams
• Debug and resolve connectivity and performance issues

Must Have

• Ability to write clean, maintainable, and well-documented code
• Strong problem-solving skills
• Experience with Git version control
• Ability to work independently and proactively
• Good German Skills (C1)

Nice to have

• Experience working with Bluetooth Low Energy (BLE) and Flutter
• Experience with IoT or connected devices
• Understanding of embedded systems communication
• Willingness to relocate

What We Offer

Join a growing technology company where your work directly contributes to innovative software and connected product solutions. We offer a 38-hour work week, flexible working hours, and the opportunity to work remotely, supporting a healthy work-life balance. You'll collaborate closely with hardware and firmware teams, take ownership of exciting Flutter and BLE projects, and have a direct impact on the development of our products.

flexible working hours & remote work opportunities

High Tech

You get to work on cutting edge technology.

Learnings

Learn fast through hands-on experience in real projects.

Team Culture

Regular team events, activities and a collaborative environment.