Battery Controller & Infrastructure Engineer (C# & Linux)

iwell; Utrecht; Hybrid; EUR 60,000 - 68,000; Full time

Benefits offered by this job

Holiday allowance 8%

30 holidays per year

Volunteer day

Learning budget EUR 1,500 per year

Pension plan

2 weeks remote per year

Travel costs covered

Phone allowance EUR 25 per month

Company activities & bootcamp

Job summary

iwell is hiring a Software Engineer for Battery Controller & Infrastructure. You will write safety-critical C#.NET code and own end-to-end infrastructure, from software to on-site network setups, ensuring safe operation of battery systems and robust operations.

You will work across Linux-based infra, Ansible orchestration, and self-hosted DevOps tooling, balancing application work with operational duties to keep systems running reliably.

Qualifications

• Solid experience as a C#.NET developer, writing clean, maintainable code.
• Knowledge of hardware communication protocols such as Modbus and MQTT.
• Hands-on experience with Linux, and a love of scripting and automating tasks away.
• Comfort with infrastructure tooling such as Ansible, Docker, Azure and OpenVPN, and with cloud/hosting environments like Hetzner.
• The know-how to set up a reliable and secure network, and the curiosity to keep up with the field.
• A genuine affinity for the operational side of software — you see running the system as part of building it.
• Strong communication skills and a habit of documenting your work. Fluency in English is required.
• 32-40 hours per week
• Office 3-4 days per week

Responsibilities

• Develop and maintain the C# application that controls our battery systems and guards their safe operation.
• Take ownership of part of our infrastructure and operations.
• Orchestrating our linux based fleet with Ansible and other automation tools.
• Keeping self-hosted infrastructure healthy across Hetzner, Azure and StackHero (OS and Docker updates, DevOps pipelines, our GitLab instance, and the Mikrotik-based VPN gateway).
• Designing, testing and documenting new on-site network setups for our Customer Operations team to install.

Skills

C#.NET

Modbus

MQTT

Linux

Automation

OpenVPN

Azure

Ansible

Docker

Networking

Tools

Docker

Ansible

Azure

OpenVPN

GitLab

Job description

iwell is hiring a Software Engineer for Battery Controller & Infrastructure. You will write safety-critical C#.NET code and own end-to-end infrastructure, from software to on-site network setups, ensuring safe operation of battery systems and robust operations.

You will work across Linux-based infra, Ansible orchestration, and self-hosted DevOps tooling, balancing application work with operational duties to keep systems running reliably.