Battery Controller & Infrastructure Engineer (C#.NET)

iwell; Utrecht; Hybrid; EUR 65,000 - 90,000; Full time

Benefits offered by this job

30 holidays/yr

Volunteer day

Learning budget EUR1500

Pension plan

Remote work 2 weeks/yr

Travel cost coverage

Mobile phone allowance

Team activities

Job summary

iwell in Utrecht is seeking a Software Engineer for Battery Controller & Infrastructure. You will develop and maintain the C# application that controls battery systems and safeguards operations, while owning parts of the infrastructure end-to-end and supporting the Operations team.

The role blends application development with hands-on DevOps, including Linux, Ansible, Docker, and cloud hosting. Fluency in English is required; 32–40 hours/week, 3–4 days in the office.

Qualifications

• Solid experience as a C#.NET developer.
• 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.

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.
• Provide Operations team support and bridge application and operations work as one role.

Skills

C#.NET

Linux

Modbus

MQTT

Scripting

Ansible

Docker

Azure

OpenVPN

Networking

English fluency

Documentation

Tools

GitLab

Mikrotik VPN gateway

Hetzner

Azure

Job description

iwell in Utrecht is seeking a Software Engineer for Battery Controller & Infrastructure. You will develop and maintain the C# application that controls battery systems and safeguards operations, while owning parts of the infrastructure end-to-end and supporting the Operations team.

The role blends application development with hands-on DevOps, including Linux, Ansible, Docker, and cloud hosting. Fluency in English is required; 32–40 hours/week, 3–4 days in the office.