Computational Design Engineer - ToffeeX (London, UK)
About the job
About ToffeeX
At 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 Role
Location: On-Site (Hybrid), London
Experience Level: Junior, Mid-Level, and Senior Roles available
Reports to: Customer Success Lead
We'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 R&D, product, and customer success and be hands-on in both engineering and software.
To view this job and apply, click here.
What You’ll Do
Work closely with our customers to understand their needs and workflows and help them apply ToffeeX to real-world engineering design challenges
Share user insights with our product and R&D teams to guide feature development
Build technical resources, including tutorials and case studies
Test new product features and help to shape product usability
Travel occasionally (up to 20%) to customer sites or industry events in the UK, Europe, and beyond
Who We’re Looking
For We 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 field
An understanding of thermal and internal flow simulations
Problem solving and debugging skills, especially in the context of engineering simulations
Excellent communication and the ability and desire to work directly with customers
Other Nice-to-haves
Experience with CFD software development
Familiarity with scripting or programming
Experience with CAD packages
Experience using 3D modelling software such as Blender or Meshmixer
What’s in it for you:
Flexibility and support for continuous learning and professional growth
25 days holiday per annum (plus UK bank holidays)
Private Healthcare with Vitality Health*
Pension Scheme with NEST
Cycle to Work scheme*
Perks at Work - Access to 30,000+ national & local employee discounts
Work From Home Friday’s
Frequent Team Socials
*Available once probationary period is complete
If you’re excited about solving complex problems and shaping the future of engineering design, we’d love to hear from you!
To view this job and apply, click here.
*Out of Architecture Disclaimer
This job listing does not include a disclosed salary range. At Out of Architecture, we strongly value transparency in compensation. However, we are sharing this opportunity as a potential resource for those considering a transition from architecture into a different field—a chance to gain experience and ease into a new career path. Additionally, Out of Architecture is available to support candidates in advocating for fair and equitable compensation during negotiations.
