What does a contract or freelance design engineer do?

A design engineer creates detailed plans and specifications for products, machines and systems, including 3D CAD modelling, mechanical design, product development and prototyping, ensuring every design is functional, safe and optimised for manufacturing.

How much does it cost to hire a freelance or contract design engineer?

Costs depend on project complexity, deliverables and time involved. Venn Projects offers fixed-price packages for clearly defined projects and hourly rates for flexible work.

Where is Venn Projects located?

Venn Projects is located just off Junction 12 of the M40 in the UK, between Leamington Spa and Banbury, and works with both local and remote clients.

Do you work with clients outside the UK?

Yes. Venn Projects has experience working with companies in Germany, Austria, Spain, Portugal, South-East Asia and the US, using video calls, shared CAD files and collaborative project management tools.

At what stage should we engage a design engineer?

Ideally from the concept phase. Engaging a design engineer late often creates difficulties with detailed engineering, commercialisation, compliance and preparation for manufacture.

Which CAD and simulation software do you use?

SolidWorks is the preferred 3D CAD platform, with certified professional status and nearly 15 years of experience. For FEA, Venn Projects works with SolidWorks Simulation, SimScale, Inspire or SimSolid.

How long do typical contracts last?

Contracts range from a few weeks for rapid-turnaround projects to multiple months for complex developments, with flexibility to suit each client's needs.

Frequently Asked Questions About Hiring a Fractional Product Design Engineer

Getting Started

A product design engineer sits at the intersection of creativity and technical rigour. Where an industrial designer focuses on how a product looks and feels, a product design engineer focuses on how it works, how it's built and how it performs under real world conditions. That means 3D CAD, structural analysis, material selection, design for manufacture and everything in between. The goal is always the same: a product that does what it needs to do, can be built consistently and makes commercial sense.
The honest answer is earlier than most founders think. Many startups bring in engineering support after the concept phase, which can create expensive problems further down the line when it comes to manufacturability, compliance and cost. Getting engineering input early, even informally, helps avoid the kind of decisions that are very difficult and costly to reverse later. If you have an idea you're serious about, it's worth having a conversation sooner rather than later.
Product design and product design engineering are related but distinct disciplines. A product designer typically focuses on the user experience, aesthetics and overall concept of a product. A product design engineer takes that concept and works out how to make it real, how it's structured, what it's made from, how it's assembled and how it performs under load, temperature or repeated use. On smaller projects one person often covers both, but they are genuinely different skill sets.

The Process

Design for manufacture, or DFM, is the practice of designing a product with the manufacturing process in mind from the outset. It considers how components will be made, what tolerances are achievable, how parts will be assembled and where cost can be reduced without compromising quality. Getting DFM right early can be the difference between a product that scales profitably and one that loses margin every time it's built. Retrofitting DFM considerations into a design that's already been signed off is one of the most common and costly mistakes in hardware product development.
Design for assembly, or DFA, is closely related to DFM but focuses specifically on how a product goes together on the production line. It asks questions like: how many parts does this product have, can any be consolidated, how long does each assembly step take, and where are the bottlenecks? A well designed product from a DFA perspective builds faster, with fewer errors and at lower cost. For a startup trying to scale production, DFA can have a direct and significant impact on unit economics.
Product certification in the UK depends on the category of product you're making. Most products sold in the UK need to meet specific standards and directives covering areas like safety, electromagnetic compatibility and energy consumption. The process typically involves mapping the applicable requirements, designing and testing to meet them, and working with an approved test house to obtain certification. It can feel overwhelming for a small team but with the right guidance it's a manageable and structured process. Getting compliance thinking into the design phase early is always cheaper than retrofitting it later.

Circular Economy

Circular economy product design is an approach that considers the full lifecycle of a product from the outset, rather than just its initial sale and use. Instead of the traditional take, make, dispose model, circular design asks how a product can be repaired, reused, remanufactured or recycled at the end of its life. That has implications for material selection, how components are joined, how easily a product can be disassembled and how long it can realistically last. With 80% of a product's environmental impact locked in at the design stage, the decisions made early matter most.
Design for disassembly is a specific circular economy practice that ensures a product can be taken apart efficiently at the end of its life. That means considering how components are joined, whether by screws, clips, adhesives or welds, and whether those joints can be reversed without destroying the parts. It also means thinking about material separability, so that different materials can be sorted and recovered rather than going to landfill together. It's one of the most practical and impactful things a product design engineer can do to reduce a product's environmental footprint.

Working With Venn Projects

A design agency typically offers a broader team, more overhead and a longer onboarding process. They work well for large, complex projects with big budgets and long timelines. A freelance engineer offers direct access to senior expertise, faster mobilisation and lower cost, without the layers of account management and project coordination that come with an agency. For early stage hardware ventures that need to move fast and spend wisely, a senior freelance engineer who can embed into the team and get on with it is often the more effective choice.
Venn Projects is one senior engineer, by design. I lead every engagement, which means the person you speak to on the first call is the person doing the CAD, the tolerance stack and the day at the factory. Where the scope needs it I bring in trusted specialists from my network, assembled around your project. There is no account manager and no handover between departments.
Yes, and most engagements run that way. Overlap hours are agreed at the start, decisions are recorded in writing rather than left in a meeting, and CAD, drawings and test data move through whatever tools your team already runs. The working day flexes to suit teams in the US and in Asia. UK and European clients usually get some on site time; overseas clients usually do not need it.
Products taken from concept to manufacture with factories and teams in the UK, Germany, Austria, Portugal, Vietnam, China, Taiwan and the USA.
The price of engagement depends on a variety of factors including the duration of the engagement, equipment and/or software licenses required, travel requirements.

After jumping on a free of charge discovery call, I’ll be in the position to be able to provide you with a bespoke costed proposal for your project.