About ToffeeXAt ToffeeX, we’re building a new generation of engineering design software. Our cloud-based platform combines physics simulation, generative design, and optimization to re-think how engineers design components like heat exchangers, cold plates, and manifolds. Trusted by some of the world’s most advanced engineering teams, we help companies to engineer better products faster.Since our founding in 2019, we’ve grown rapidly and recently moved into a new Central London office. We were named one of the UK’s top 100 startups by Startups.co.uk in 2025.The RoleLocation: On-Site (Hybrid), LondonExperience Level: Junior, Mid-Level, and Senior Roles availableReports to: Customer Success LeadWe''re looking for a Computational Design Engineer to help our customers (and prospects!) solve complex thermal and fluid flow problems using ToffeeX.This is not a “follow the process” role. As part of a small, high-trust team, you will take ownership of difficult technical challenges, guide customers in applying our cutting-edge tools, and help to shape the future of our product. You will work across our engineering teams, interfacing with RandD, product, and customer success and be hands-on in both engineering and software.What You’ll DoWork closely with our customers to understand their needs and workflows and help them apply ToffeeX to real-world engineering design challengesShare user insights with our product and RandD teams to guide feature developmentBuild technical resources, including tutorials and case studiesTest new product features and help to shape product usabilityTravel occasionally (up to 20%) to customer sites or industry events in the UK, Europe, and beyond.Who We’re Looking ForWe want people who are curious, technically skilled, and excited to build in a fast-moving and sometimes ambiguous environment. If you''re a builder, a do-er, or someone who thrives in uncertainty, we want to hear from you.Most fundamentally, we are not hiring a checklist. We are hiring

people

with strong fundamentals, and a track record of building and growth. That said, the following skills would be useful for this role.A builder’s mindset – you’ve shipped real projects, demonstrated new ideas, and learned from failures.A degree in engineering, physics, or a related fieldAn understanding of thermal and internal flow simulationsProblem solving and debugging skills, especially in the context of engineering simulationsExcellent communication and the ability and desire to work directly with customersOther Nice-to-HavesExperience with CFD software developmentFamiliarity with scripting or programmingExperience with CAD packagesExperience using 3D modelling software such as Blender or Meshmixer

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