Senior Go Engineer - IoT & Energie-Integrationen (m/w/d)

Job Description

At gridX we're building the software infrastructure that connects real-world energy hardware, batteries, inverters, EV chargers, heat pumps, and smart meters, into one unified energy ecosystem.

As a Senior Go Engineer, you'll develop the systems that allow thousands of devices from dozens of manufacturers to communicate reliably with our platform in real-world environments. This is not typical backend CRUD development. Your software runs on Linux-based IoT gateways at the edge, communicates via protocols like Modbus, REST, EEBUS, and OCPP, connects to the cloud through HTTP and gRPC, and translates hardware-specific protocols into a unified data model.

What you'll work on

• Device integrations: Build and maintain Go services that poll measurements, send control commands, and handle communication failures, retries, and recovery flows across real hardware environments.
• Integration framework: Help evolve our next-generation integration stack with mTLS security, mDNS discovery, and declarative device configurations, while migrating existing drivers into the new architecture.
• Tooling & ecosystem: Contribute to internal validation tooling and integration frameworks used by both gridX engineers and external OEM partners to develop and verify device integrations.
• AI-assisted engineering: We actively use AI-assisted and agentic coding workflows across implementation, testing, code review, and specification analysis. You'll help shape how these workflows evolve within the team.

Day-to-day, that means

• Implementing integrations based on datasheets and protocol specifications
• Designing resilient systems for unreliable communication and real-world timing constraints
• Migrating imperative drivers into declarative integration models
• Debugging low-level communication issues using tools like tcpdump and register dumps
• Contributing to protocol specifications, tooling, and integration architecture
• Collaborating closely with firmware teams, hardware manufacturers, partners, and domain experts
• Mentoring teammates and contributing to technical direction across teams

This is how you and your application stand out

What matters beyond code

• Pragmatism over perfection: You focus on delivering robust solutions, iterating quickly, and avoiding unnecessary complexity.
• Ownership: You take responsibility beyond implementation - from architecture and debugging to operational reliability in the field.
• Product thinking: You care about the impact your work has on users, partners, and the broader energy ecosystem.
• Curiosity for the domain: You're excited by complex systems, connected hardware, and renewable energy technology.
• Engineering excellence: You write maintainable Go code, think deeply about system design, and enjoy improving tooling, architecture, and developer experience.

Tech environment: Go Linux Docker Kubernetes gRPC Protocol Buffers Modbus EEBUS OCPP React/TypeScript CI/CD * Nix

Nice to have:

• Experience with IoT or embedded-adjacent systems
• Familiarity with electrical engineering concepts
• Contributions to open-source projects
• German and/or Mandarin language skills

Why gridX

• Flexible & mobile working: Work remotely for up to 70 days from anywhere in the EU
• Vacation: 30 vacation days + 0.5 days of special leave for both December 24th and 31st
• Health & Sports: 30 Euro allowance for Urban Sports Club or E-Gym Wellpass as well as offers for company health management & (Mental) Health Care
• Personal development: cross-functional coaching, access to e-learning platforms & an annual development budget of 1,500 euros per employee
• Employee discounts: Access to gridX Corporate Benefits
• Stay fit and save the planet with our JobRad offer
• Receive a fair monthly contribution to your company pension plan
• City travel subsidy: 30 Euros monthly allowance for your monthly/annual ticket
• Modern workplace in the heart of Aachen and Munich with IT equipment of your choice
• Relocation Support: We support your relocation to Germany
• Experience the gridX culture at regular team events and receive an additional 100 Euros per employee for your department event
• We will donate 20 Euros to a charity of your choice on your birthday
• Sabbatical option: Take a break from your daily work routine to pursue personal projects, travel, or further education.

*Our benefits differ for 100% remote employment!