(Senior) Fullstack Developer (m/f/d)

We support our customers in making buildings more climate-friendly, more comfortable and more affordable with connected real estate, simple products and high processing and service quality. We provide our customers with efficient, tailored processes and applications for operating IoT infrastructures in real estate, as well as our flexible Enterprise-IoT-Suite, in which we manage data from many millions of sensors into intelligent products and services.

With a team of product and IT experts, the future position holder will be responsible for further developing beyonnex's Enterprise-Suite and services to ensure a stable and scalable technological foundation for the strategic development of the group of companies. In addition, the following tasks will be part of your position:

• Together with your team, you develop and maintain full-stack software solutions for an Android-based installer app and supporting backoffice tools in the field of real estate energy management.

• Implement installer workflows that guide technicians through device installation, replacement, including full digital documentation of installations.

• Build and operate backend services and APIs for data processing, validation, health checks, and integration with downstream systems (e.g. dispatching, billing, heat cost calculation).

• Design and maintain data models for buildings and installed devices, ensuring data quality and consistency.

• Collaborate closely with product, UX, and domain experts to deliver reliable, user-friendly solutions and continuously improve the platform.

• Participate in code reviews, architectural discussions, and continuous improvement of development practices, performance, and system stability.

• Support the full software lifecycle, from concept and implementation to testing, deployment, and maintenance.

We are searching for a motivated candidate with the following qualifications:

• Proactive, problem solving mindset

• Ability to communicate complex ideas in clear and concise way (in English)

• Strong collaboration skills and experience working closely with other teams (product, frontend, QA, DevOps, etc.)

• At least 5 years of experience working as a Software Developer

• Proficiency in development with Kotlin, Java or similar (JVM) languages

• Professional working experience with a frontend framework like Angular, React or Vue.js

• Solid understanding of object-oriented design, clean code principles, and software architecture

• Experience designing, implementing, and consuming RESTful APIs

• Good knowledge of relational databases (e.g. PostgreSQL, MySQL) and SQL

• You’re located in Germany

Optionals, but nice to have

• Proficiency with observability and monitoring tools like Grafana, Prometheus etc.

• Experience working with event-driven architectures and messaging systems such as Apache Kafka

• Knowledge of containerization and orchestration technologies (Docker, Kubernetes)

• Experience with CI/CD pipelines and automated testing practices

• Understanding of security best practices (authentication, authorization, OWASP)

• German language skills

We have a modern environment with flat hierarchies. Our colleagues very often highlight our great spirit to achieve our goals. Our company is a place to be yourself, aim high, taking care of each other and growing without limits. Additionally, we offer following benefits:

• Modern hardware and the opportunity to work with cutting-edge technologies
• Besides our 100% remote work possibility, we offer an office in Hamburg (Hammerbrook) for a more personal collaboration
• Space and budget for personal growth
• Flexible working hours 
• 30 days vacation
• Events for employees to celebrate our achieved goals and great team-spirit
• Community of Practice and Knowledge Nuggets for improving your skills
• Corporate Benefits and Mental Health Programme
• JobRad-Leasing 
• Coffee, tea and water for free in our office

If you are interested in the role, this is they way how to proceed:

1. Send us your complete application documents (curriculum vitae and references).
2. Once you've submitted an application, if successful, you will directly get in touch with our HR team.
3. You'll meet potential team members of beyonnex to get more information about our company and why we love to work at beyonnex. 

In case you have any questions about the offered position, your application or the application process, send us an email to jobs@beyonnex.io.

beyonnex.io is part of noventic group, a pan-European group of companies driving climate intelligent management of real estate. The independently operating noventic brands manufacture sensors, radio hardware and control devices, offer services for the operation of IoT infrastructures in real estate, and operate Enterprise-IoT-Suite as well as applications for the realization of climate goals, comfort and profitability. With over 1,250 employees, the company now realizes a turnover of nearly €300 million and is considered the driver of innovation in the industry.