Jonathan D’Costa · Frimley, Surrey
Engineering candidate and founder working across CAD, 3D visualisation and software. I’m establishing JDC Ventures to develop engineering-led products and businesses, building on cleanroom tooling, a shipped web app and three years in business operations.
Founder of JDC Ventures, currently in formation. I’m bringing engineering, software and commercial operations together to develop a portfolio of products and businesses. The foundation is three years running a UK limited company: suppliers, a private-label launch, advertising, bookkeeping and margin.
3D visualiser and multidisciplinary maker with five years in Blender, plus Unreal Engine and Unity. Product renders, paid CGI advertising, CAD prototypes and a shipped web app now form the practical base for JDC Ventures, currently in formation.
jdc@jfdcosta.com · linkedin.com/in/jfdcosta · jfdcosta.com · Full UK driving licence · Right to work in the UK
01 / Selected work
Three projects that show how I approach a problem: define the constraint, make something concrete, test it in the real context and learn from what fails.
One answer to “what should I eat?” matched to budget, kitchen equipment and nearby shops.
Built and shipped end to end as a single-file PWA, with a Cloudflare Worker backend and Gemini API. No accounts, no database and zero cost to the user. Testing caught a recommendation that was pricier and nutritionally worse than what it replaced; the fix was tighter constraints and tests, not more trust.
Open live projectSolidWorks jigs developed from printed prototype to release for CNC manufacture.
Modelled after learning SolidWorks by reverse-engineering a physical component with vernier calipers. The 3D-printed prototype was checked against the real production equipment in the cleanroom, refined, then released to the machine shop.
Supplier negotiation, packaging, FBA compliance, CGI advertising and the unit economics behind the result.
I negotiated price, minimum order and specification directly with manufacturers on Alibaba; validated quality against a comparison sample; designed the packaging; produced a Blender CGI ad that ran as a paid TikTok spot; and ran Amazon advertising. It sold through most of the launch inventory and still lost money. Diagnosing why is the useful result.
02 / Experience
A new venture built on practical engineering and commercial experience: production constraints, product launches and decisions that appear in the accounts.
JDC Ventures · in formation · Frimley
Establishing a home for engineering-led projects and businesses, bringing mechanical design, software, visualisation and commercial operations into one end-to-end approach.
Sep 2026 – present
Custom Interconnect · Andover · on site
One-month placement in the Micro Electronics department at the UK’s largest outsourced semiconductor assembly and test facility.
Jul 2024
Jollymart Ltd · Frimley
Ran operations for a UK-registered limited company from age 15: wholesale sourcing, a private-label product launch and day-to-day management across Amazon, eBay and a self-built website.
Aug 2023 – Aug 2026
Working method
The common thread across CAD, software and business is not the tool. It is moving from an idea to something that can be checked—and being willing to change the answer when the evidence disagrees.
Dimensions, production equipment, budget, margin, nearby shops: state what the result must survive.
A printed jig, a live PWA or a comparison sample gives the idea somewhere concrete to fail.
Refine the jig, tighten the prompt constraints, or change the budget decision. Testing is useful only when it changes the work.
03 / Education
Maths, physics and chemistry now; design and computer science as the practical base underneath them.
04 / Capability map
Click any skill to highlight where it was used. This turns a list of claims into a map back to the work.
05 / Verification
Formal records where they add evidence; current operating registrations where they change what I can do.
Anthropic · Sep 2026
Credential 83ebec5942c95468df4a35f30cd11340
Verify credential ↗Anthropic · Sep 2026
Credential 85d5deb499ff1c050c08229fd5d1d494
Verify credential ↗UK Civil Aviation Authority · current
Flights planned against live airspace restrictions, including the Farnborough zone.
DVLA · current
Category B · passed May 2026.
Outside the work
A few moments away from the desk, from my personal Instagram. A different side of the person behind the projects.
Contact
Alongside developing JDC Ventures, I’m applying for 2027 entry to mechanical and aerospace engineering degree apprenticeships. I’m open to relevant placements, insight days and conversations about products, prototypes and early-stage ventures.
jdc@jfdcosta.com
