Best, NB, Netherlands

Full Stack Developer C#

 Job Description:

Full Stack Developer C# 

Are you looking forward to making an impact in cleaner, greener energy for big public & commercial transport solutions? Then join our energetic, international team!

Heliox is a market leader in the Electric Vehicle Infrastructure sector, with a leading e-mobility Platform to support the change within Urban Transportation.

We provide world class smart energy management solutions that are tailored and scalable within a fast changing e-mobility landscape. Due to our continued success we are seeking a Full Stack Developer C# to join our innovative team.

In 2021/22 we have continued our growth as the Market Leader in eBus Infrastructure across Europe, and now we need people as excellent as our existing team and Products to support our expansion!

Curious about our mission? Check this 1-minute film starring our chargers at Schiphol:

The role:

As a Full Stack Developer C# you will play an important role in building, designing, maintaining and debugging the next version of Heliox’ IoT Asset and Energy Management SaaS Solution (Heliox Service House).

You will implement functionality, sub systems, and deploy increments of the Heliox Service House software. We are working on CI/CD for this, so your work will be automatically tested (and needs to be test ready).

You will work closely together with Project Managers, the Product Owner, Architects and the Development Team.

You report directly to the Manager Software (career & development) and to the Project Manager (project related).

Your main tasks and responsibilities :

Medior level:

Researching, designing, testing and implementing software solutions

Write high quality, robust, structured code and commit to the source control system.

Maintaining and debugging existing software solutions

Updating user-story and task information

Estimate user-stories

Participate in stand-ups, sprint planning and review

Senior level, added:

Propose and explain architectural choices

Design and spec new functionality with the Product Team

Code review

Scrum Master

You are:

A true software expert; You are an adventurous inventor and you are very familiar with all layers of the technology stack used to create software products. You know how each level works, and more importantly, you can manipulate any internal structure.

You are a strong team player, you have a winners’ mentality and you are reaching for excellence. With your can-do mentality, you take ownership by steering upon on time deliverables with the right quality of content.

You show these competencies by being:

  • a strong analytical thinker, with attention for detail
  • committed to yourself and to the team
  • result-oriented and a problem-solver
  • open for change and inclusion minded.
  • accountable for performance

This is on your CV:

  • A bachelor (HBO) or masters’ degree in Bachelor or Masters’ degree in the field of Computer Science, Mathematics, or similar
  • 4+ years of relevant experience in a similar position, preferably within a high-tech organization;
  • Pré: Working experience in other large, high scale IoT SaaS Platform development
  • Full proficiency of English (native or near native level), Dutch is a bonus.

You have knowledge of:

  • C#, ASP.NET (Core) & .NET (Core)
  • unit testing, CI and CD
  • design Patterns / SOLID / Object Oriented Programming
  • Docker / Containers
  • databases / T-SQL
  • Source Control tools (Git, Bitbucket)
  • Issue trackers
  • Agile development process


  • Frontend frameworks like Blazor, React, Angular or Vue
  • Linux
  • Experience with charging equipment and charging standards (OCPP, OCPI etc.) is an absolute pre.

We offer:

A challenging and pivotal role within a scale-up company with a mission to make the world a better place. We have an open environment where you can continuously develop yourself. And:

a salary between € 3.700,- and € 4.500,- gross per month (full-time), depending on your experience, level (medior/senior) and competencies.

good fringe benefits such as profit sharing and a personal bonus (both performance dependent), flexible working hours, 31 vacation days (FT), and training opportunities.

a laptop and a mobile phone.

Energy at our headquarters in Best, with fresh coffee (ground beans), our sit-stand desks and a selection of fresh fruit.

Recruitment agencies: we prefer to recruit our newest Helioxers ourselves. We will not react to calls or mails, we know where to reach you in case we need help!


Do you also feel the energy while reading this job content? APPLY!

(A motivational letter is not needed, but you are always welcome to send us one, you can upload it too. )

Any questions? Call our Corporate Recruiter Debby Bastiaansen at 06-11183562.

Also want to become a Helioxer but in another function? Please check out our career page and follow us on LinkedIn!

An assessment may be part of the selection process.


More about Heliox:

Heliox is a company in the Brainport area that is growing rapidly! Four years ago, we were with 30 people, now we are with over 240 Helioxers and in 2022 we expect to grow even more! Our (fast) charge systems have been installed in more than 20 countries all over the world. Over the last couple of years, we have won the prestigious FD Gazelle Award 4 times for the fastest-growing company in the Netherlands. We have also won the VDV award for best electrical charging infrastructure and we are very proud of that.

We achieve short process times through our short communication lines and processes. This enables us to deliver custom made products in a short time window. We barely know any hierarchy; everyone is equal. Our employees represent over 30 nationalities. Continuous growth makes our jobs dynamic, but we always look out for each other; we trust one another, and we can always count on each other.

Our core values: Sustainable – Cooperative – Exploring – Sincere – Ambitious - Proud

  Required Skills: