Timefold: Optimization Model Engineer - Ghent, Belgium (hybrid)
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Posted Jun 21, 2026
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Timefold: Optimization Model Engineer - Ghent, Belgium (hybrid)
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This is Timefold - We’re building the future of intelligent planning—join us on the journey.
We are an AI planning optimization platform built on powerful, field-proven open-source solver technology. Simply put: we enable software builders to tackle some of the world’s most complex, high-impact operational planning problems. From optimizing vehicle routing and employee scheduling to streamlining maintenance planning and field service logistics, our tech delivers massive economic value where it matters most.
We are on a relentless mission to free the world from wasteful scheduling! Founded in 2023, we represent the exciting next chapter of OptaPlanner—the legendary, field-proven open-source project that laid the foundation for everything we build today.
Today, we are a technically sharp, deeply passionate team of over 40 people. While our headquarters are nestled in the iconic Wintercircus building in Ghent, Belgium, we operate as a remote-first team with vibrant hubs across Belgium, the Czech Republic, Brazil and the US.
About the role
As an Optimization Model Engineer at Timefold, you will be instrumental in crafting advanced AI planning models and contributing to the evolution of our optimization solutions.
You will translate complex real-world business constraints into mathematical and algorithmic models. This involves defining the problem’s architecture in Java. You will design systems that handle unexpected real-world disruptions.
As an Optimization Model Engineer you will be evolving the code to ensure it scales elegantly from a few dozen variables to thousands of interconnected tasks, keeping the engine lightning-fast and memory-efficient.
Key Responsibilities
Collaborate with cross-functional teams to understand planning challenges
Collaborate with cross-functional teams (such as Product Managers & Solutions Engineers)
Play detective and dissect the challenges into strict constraint definitions. You are able to determine what is an absolute blocker versus what is just a strong preference, ensuring no critical real-world requirement is lost in translation.
Develop, implement, fine-tune, and maintain planning optimization models
Architect the problem inside Timefold’s code ecosystem.
Tweak metaheuristic configurations so the model finds a perfect solution for our customers
Analyze and enhance the performance of existing optimization models
Use profilers and benchmarks to hunt down bottlenecks.
Analyze performance of existing models and be curious on optimizing and variables.
Build the core commercial elements of our product offering
Shift focus from solving a single problem to building a scalable platform
Package these complex models into out-of-the-box, cloud-native Optimization APIs that any enterprise can integrate.
Build the surrounding infrastructure that allows Timefold’s commercial engine to handle hundreds of client requests simultaneously in the cloud. This includes writing robust serialization code, designing fast data-input validation layers, and ensuring the engine can scale seamlessly.
Key Qualifications
Advanced Java expertise - Leveraging deep knowledge of Java to build robust, scalable, and efficient...