IoT Platform Engineer - Energy Systems (f/m/d)

Tasks

FION Energy develops software for the dimensioning, intelligent control, and monitoring of industrial energy storage and PV systems. Our AI-driven platform optimizes battery operations across peak shaving, self-consumption optimization, spot market trading, and flexibility marketing, cutting electricity costs with payback periods of 2-4 years. We're a Berlin-based team with paying customers and batteries already running in the field.

Our mission is to build a truly end-to-end platform - from ML and optimization, through data streaming and control, to the edge device sitting at the customer site. We're looking for an engineer with deep experience in edge and IoT systems to join us as an early hire. You'll work on our cloud data and control platform, our own edge stack, and different edge and cloud integrations - whatever matters most for the business right now. This is a startup role: you should be comfortable switching between strategic thinking and hands-on work.

You'll work directly with the CTO and co-founder.

Requirements

You bring:

• 5+ years of professional software engineering experience
• Hands-on experience deploying and managing IoT or edge devices in production
• You've dealt with the reality of physical hardware in the field
• Strong Linux skills (our edge devices run on it)
• Experience with at least one device integration over industrial protocols (Modbus, MQTT, OPC-UA, or similar)
• An ownership mindset- you want to shape the platform, not just implement tickets

Even better if you have:

• Energy domain knowledge - you understand power, energy, phases, and how the grid works
• Experience with fleet management - OTA updates, device monitoring, remote debugging across many sites
• Familiarity with embedded Linux (Yocto, Buildroot, or similar) and containerized edge deployments
• Experience evaluating and selecting industrial edge hardware
• Experience with cloud IoT platforms (AWS IoT, Azure IoT Hub, or similar)
• Go, Rust, or Java in an IoT/systems context
• German language skills (our customers and partners are German)

Benefits

**Ownership
**This isn't a role where the architecture is decided and you fill in the blanks. The edge platform is greenfield - you'll co-design it from the ground up.

Real impact, fast Your code runs physical batteries that save real factories real money. You'll see results the same week you deploy.

Founding trajectory As FION grows, you grow with it - from hands-on builder to platform lead overseeing a fleet of batteries across the country. What takes 5 years at a large company, you'll have from day one.

Compensation

• 70,000 - 100,000 EUR annual gross salary (depending on experience)
• VSOP (virtual shares) - you participate in the company's success
• Berlin hybrid (remote from within Germany, possible for the right person)

Send us:

• Your CV or LinkedIn profile
• A few sentences on why this role interests you
• Optionally: a link to a project, repo, or writeup that shows how you think about technical problems

We review every application personally and get back to you within a week. No automated screening - you're writing to a person

Find more English Speaking Jobs in Germany on Arbeitnow

Position Details

• Job Title: IoT Platform Engineer - Energy Systems (f/m/d)
• Company / Organisation: FION Energy GmbH
• Location: Berlin
• Employment Type: Full-time
• Field / Industry: Software Development
• Work Arrangement: On-site or hybrid - Berlin

About This Opportunity

This full-time opportunity at FION Energy GmbH is an excellent opening for experienced professionals in the field of software engineering and technology. The role is structured around an on-site or hybrid environment based in Berlin and is designed for candidates who are ready to make a meaningful contribution from the moment they join.

Based in Berlin, this role offers the opportunity to collaborate closely with a local team in a structured professional environment. Candidates currently based in the area or open to relocation are strongly encouraged to apply.

Whether you are an established practitioner in software engineering and technology or a highly skilled professional looking for your next challenge, this IoT Platform Engineer - Energy Systems (f/m/d) role offers the platform to apply your expertise in a real-world, results-oriented environment. FION Energy GmbH is looking for a candidate who can hit the ground running and add genuine value to the team.

Who Should Apply

This role is ideal for candidates who have a solid background in software engineering and technology and a demonstrable track record of delivering high-quality results. You should possess analytical thinking, attention to technical detail, and a methodical approach to problem-solving. Experience working with modern development tools, version control systems, and cloud platforms will be an advantage, though a commitment to continuous learning and professional development is equally valued.

Beyond technical or domain expertise, FION Energy GmbH is looking for someone who communicates clearly, collaborates effectively with colleagues and stakeholders, and takes ownership of their work from start to finish. If you thrive in a professional environment and are passionate about the opportunity to build reliable, scalable, and high-performing digital products, we encourage you to apply.

Key Competencies for This Role

Successful candidates for the IoT Platform Engineer - Energy Systems (f/m/d) position at FION Energy GmbH will typically demonstrate the following core competencies:

• Domain expertise - a strong foundation of knowledge and hands-on experience in software engineering and technology
• Problem-solving ability - the capacity to identify challenges, think critically, and implement practical solutions efficiently
• Communication skills - clear and professional communication with colleagues, stakeholders, and partners at all levels
• Self-management - strong time management and the ability to prioritise a varied workload while meeting deadlines
• Team collaboration - a collaborative and supportive approach to working alongside colleagues across departments or locations
• Adaptability - the ability to respond positively to change and thrive in a dynamic, evolving work environment

How to Apply

To apply for this IoT Platform Engineer - Energy Systems (f/m/d) position at FION Energy GmbH, click the "Apply Now" button on this page. You will be taken directly to the official application page where you can complete and submit your application.

Before applying, please ensure that your CV or résumé is fully up to date and clearly highlights your experience and accomplishments in software engineering and technology. If a cover letter is included or requested, tailor it specifically to this role and explain how your background, skills, and goals align with what FION Energy GmbH is looking for in a IoT Platform Engineer - Energy Systems (f/m/d).

All applications for this role are processed directly by FION Energy GmbH. Career Nest facilitates the job discovery process and does not pre-screen or forward applications on behalf of employers. There are no fees for job seekers at any stage of the application process.

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