Medior Developer - Frontend, Backend & Firmware

This is a hands-on developer role across our full IoT stack. Your primary focus will be our web platform, covering frontend interfaces and backend services, while also contributing to firmware on our ESP32-based devices. We're looking for someone who feels genuinely comfortable moving across all layers of the software stack: from embedded device logic to cloud services to consumer-facing UI. In a team like ours, that versatility is what makes the difference.

What You Will Do

Frontend & Web

• Build responsive, performant UIs using JavaScript and Web Components

• Develop and maintain the customer-facing dashboard and consumer app interfaces

• Collaborate with the commercial team to translate user needs into intuitive experiences

• Design and build backend services and APIs in Java and/or JavaScript (Node.js)

• Work with cloud infrastructure: AWS, Docker, and Linux-based environments

• Build and maintain the services that connect our IoT devices to dashboards, consumer apps, and third-party energy platforms (dynamic pricing, VPP, peer-to-peer trading)

Firmware & Embedded

• Contribute to firmware development on ESP32 (and optionally STM) platforms

• Help develop the device-side logic that bridges hardware and cloud

• Debug and validate embedded systems in real-world deployment scenarios

Agentic Development

• Leverage AI coding tools and agentic workflows to move fast and iterate, * Are you comfortable with APIs, data models, and permissions/consent concepts?
• Have you built products where requirements were unclear and you had to define MVP scope through discovery and pilots?
• Share one example where you turned an unclear problem into a shipped MVP. What did you learn?

Do you have experience in Application development?, Do you have a Bachelor's degree?, * Medior developer who feels at home across the full software stack, from firmware to cloud to UI

• Proficient in Java, JavaScript, and Web Components

• Comfortable with cloud platforms (AWS), Docker, and the Linux command line

• Some hands-on experience with embedded systems, ESP32 preferred and STM a bonus

• Drawn to IoT architectures and excited about systems where hardware, firmware, and cloud connect

• Familiar with agentic development tools and AI-assisted coding workflows

• Broadly curious and eager to keep learning, you don't silo yourself by discipline, * Bachelor's (Preferred), * Product Management: 5 years (Required)

• Application development: 3 years (Preferred)

• consumer-facing mobile/web products?: 3 years (Preferred)

Language:

• English (Required)
• Dutch (Preferred)

Pulled from the full job description

• Travel reimbursement

• Professional development assistance

• Stock options

• Profit sharing

• Company events, * Competitive compensation, discussed openly during the interview process

• Open to fixed employment or freelance: we care about fit, not the contract type

• Equity opportunity earned over time based on contribution and impact

• Early-stage influence: you'll help shape the technical architecture from the ground up

• A chance to build meaningful technology that changes how people use energy

• A dynamic, mission-driven team with room to grow in all directions, * Company events

• Professional development assistance

• Profit sharing

• Stock options

• Travel reimbursement

MyGrid is an ambitious cleantech startup building the future of accessible home energy storage. Our plug-and-play battery ecosystem empowers people to take control of their energy use and unlock new services such as dynamic pricing, VPP participation, and peer-to-peer trading.