# Backend Developer

> Hysopt · Deurne, Belgium (Hybrid) · Full-time · Posted 2026-03-26

**Workplace:** hybrid

**Department:** R&D

## Description

Want to grow together with a cutting-edge company, work with innovative software and put your passion for energy to use, all while helping to save the earth?

As a Backend Developer, you **contribute to the “behind the scenes magic”** of the Hysopt product suite on a daily basis. You help transform complex physical HVAC concepts and mathematical models into high-performance, scalable software that engineers rely on to design better systems.

_**This is what your week looks like:**_

-   You use modern technologies like Java, Spring Boot, and popular Java libraries
-   You develop API’s, business logic and algorithms **in the heart of our software**
-   You become a **part of an experienced R&D team** which is responsible for the full software development lifecycle, including implementation, architecture, devops, testing, requirements and maintenance

_**You recognise yourself in this:**_

-   Master in Computer Science, Computer Engineering or equivalent, with **at least 3 years** **experience in Java backend development**
-   **Affinity with physics and/or mathematics**, and interested in understanding the hydraulic and thermodynamic behavior of heating and cooling systems
-   Experience with the total lifecycle of software development, or eager in making it your own
-   Knowledge of the following technologies is an advantage: Java, Spring, Hibernate, Lombok, Mapstruct, Feign, OpenApi, MySql, Maven, Gradle, Intellij products, Amazon AWS and all its services, Docker containers, Atlassian products and OAuth 2.0
-   Experience with Scrum or Agile development methodologies
-   **Fluent in English**, Dutch is a plus

_**What’s in it for you:**_

-   Have **a big impact on our company and the climate**
-   Join a company that revolves around innovation and **continuous learning**, with the help of experienced colleagues, the usage of the latest technologies, and a training budget
-   Get **an attractive salary with additional benefits**, such as a company car, group insurance, etc.
-   Have the possibility to work part time from home

**We are Hysopt**

Hysopt is a rapidly growing SaaS company originating from the University of Antwerp. We develop physics-based HVAC engineering software that helps engineers design, analyse and optimise complex hydronic systems with confidence.

Our cloud platform enables better-informed design decisions, improved system performance and a smoother transition towards low-carbon building systems. By replacing rule-of-thumb calculations with accurate simulation, we support HVAC professionals in delivering efficient, reliable and future-proof solutions.

ㅤ

_Applications are reviewed on a rolling basis, so speed is key. The sooner you apply, the quicker we can arrange an interview. Unfortunately we aren't in a position to sponsor candidate visas. If you don't have the independent right to work in Belgium we will not be able to progress your application._

## Apply

[Apply at Hysopt](https://apply.workable.com/hysopt/j/8CF0334925/apply)

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