Experience and qualifications

Jonathan D’Costa

I’m seeking a 2027 mechanical or product engineering degree apprenticeship. Here you can explore my experience, projects and qualifications.

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01 / Experience

Experience.

My industrial placement, followed by my work in product development and business operations.

Work experience, Micro Electronics

Custom Interconnect · Andover · on site

I completed a Micro Electronics placement at Custom Interconnect Ltd, working on assembly-jig design and semiconductor manufacturing processes.

I designed assembly jigs in SolidWorks and co-developed a 3D-printed prototype. I tested it against production equipment in the cleanroom; the design was refined before release for CNC manufacture.
I trained in SolidWorks by reverse-engineering a physical component, using vernier calipers to produce an accurate 3D model.
I followed chip-on-board packaging end to end: wafer dicing against customer known-good-die data, die attach to in-house PCBs, wire bonding and glob-top encapsulation.
I took part in wire-bonding operations and trained on the wire-bonding machine.
I worked to cleanroom discipline: full gowning, ESD control and airborne particle monitoring to maintain ISO 14644-1 classification.
I applied Python from GCSE Computer Science to test and debug an existing Tower of Hanoi implementation, working through move validation and state-handling logic.

Jul 2024

Director

JDC Ventures Ltd · Frimley

I’m developing early-stage physical and digital products, including Cravate. I became Director in September 2026, following the company’s rename from Jollymart Ltd.

I define a real problem, build a testable solution and refine it against practical and commercial constraints.
I work across physical products, digital tools and new commercial ventures, considering design, delivery and operations together.

Sep 2026 – present

Business Operations Manager

Jollymart Ltd · Frimley

I 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.

I managed a private-label launch end to end: I negotiated price, minimum order quantity and specification directly with manufacturers, then validated supplier quality before committing to a bulk order.
I designed private-label packaging and compliance: custom tamper-seal branding, Amazon FBA barcode labelling and an in-pack QR code prompting reviews.
I led go-to-market and produced all creative in Blender, including a CGI spot used for a paid TikTok ad.
I created JollySip and JollySwipe’s naming, Amazon listing copy and complete product image sets. Each listing’s visuals took one to two weeks of Blender modelling and rendering, then Canva typography and layout.
I ran Amazon advertising and diagnosed the launch’s real loss drivers: ad spend outpacing margin, competitive underpricing and a supplier defect rate.
I managed bookkeeping and accountant liaison, preparing financial records for statutory filings. I redesigned the reporting format in 2026; the accountant adopted it as the standard going forward.
I built the company’s original website manually in Brizy.

Aug 2023 – Aug 2026

02 / Evidence

Selected work.

I’ve summarised my projects here. Explore each one for my process, images and documentation.

3D Design project · Organic Forms brief · 2024–2025

Mushroom Tissue Stand

I used user research, Fusion 360 and physical prototyping. I redesigned one mould half as a hollow shell, reducing its estimated resin cost from over £50 to about £9.

CAD · prototyping · manufacture

Explore Design diary

3D Design project · Angles brief · 2025

Angles light fixture

I used Fusion 360, TechSoft cutting layouts and card prototypes to resolve spacing, alignment and LED clearance before the final assembly.

CAD · prototype testing · assembly

Explore the light Design diary

Cyberset light with orange diffuser and layered octagonal frame

3D Design project · Fantasy Light brief · 2023–2024

Cyberset light fixture

I built a layered plywood and acrylic light using TechSoft cutting layouts. I revised the physical prototypes to refine the layer construction and final assembly.

Laser cutting · materials · physical revisions

Explore the light Design diary

Software project · live beta · 2026–present

Cravate

I developed a food-decision app with AI assistance: a cook-or-buy answer shaped by budget, time, equipment and the chosen shop. I built it with a Cloudflare Worker backend and tested it against practical constraints.

Product definition · interface · deployment

Software case study Open app

Frame from the independent Cano Water product animation

Independent Blender practice · 2025

Cano Water practice advert

I made this 21-second product animation in Blender to develop my modelling, materials, lighting and visual communication. I created it as independent practice; Cano Water did not commission it.

Blender · product visualisation · animation

Watch the animation

Working method

Design and testing

Across CAD, software and business, I turn ideas into something I can test. I change my approach when the evidence shows that it needs improving.

Define the constraint

I start with the constraints: dimensions, production equipment, budget, margin or nearby shops.

Build the testable version

I build a printed jig, a working app or a comparison sample so I can check the idea in practice.

Use the failure

I use the results to refine the jig, tighten the app’s constraints or change a commercial decision.

03 / Education

Education

The Sixth Form College Farnborough

A-levels · 2025–2027

A-level predictions updated 20 October 2026.

MathematicsPredicted A
PhysicsPredicted B
ChemistryPredicted C
AS Further MathematicsAchieved B · 2026

All Hallows Catholic School, Farnham

GCSEs · 2020–2025

3D Design9 / A*

Physics9 / A*

Mathematics8 / A*

Computer Science8 / A*

English Language8 / A*

Religious Studies8 / A*

Chemistry7 / A

Biology7 / A

Geography7 / A

English Literature6 / B

Letter grades are approximate comparisons with the old scale. How the scales compare ↗

04 / Skills in practice

How I use my skills.

Open a skill to see what I did and the specific work behind it.

CAD & prototyping

SolidWorksCustom Interconnect

I designed assembly jigs in SolidWorks and co-developed a 3D-printed prototype.

Read my jig-design experience

Fusion 360Mushroom Tissue Stand · Angles

I used Fusion 360 for the Mushroom Tissue Stand and Angles light. For Angles, I checked the layered assembly and LED clearances in CAD, then used card prototypes to check spacing and alignment.

Explore my Angles project Explore my Mushroom Tissue Stand

TechSoft 2D DesignCyberset · Angles

I used TechSoft cutting layouts for the layered plywood and acrylic Cyberset light and for the Angles light.

Explore my Cyberset project Explore my Angles project

3D-printed prototype developmentCustom Interconnect

I co-developed a 3D-printed prototype and tested it against production equipment in the cleanroom.

Read my prototype-testing experience

Manufacturing constraints & redesignMushroom Tissue Stand

I redesigned one mould half as a hollow shell, reducing its estimated resin cost from over £50 to about £9.

Explore my mould redesign

Reverse engineering with calipersCustom Interconnect

I reverse-engineered a physical component using vernier calipers to produce an accurate SolidWorks model.

Read my reverse-engineering experience

Manufacturing exposure

Wire-bonding trainingCustom Interconnect

I took part in wire-bonding operations and trained on the wire-bonding machine.

Read my wire-bonding experience

Chip-on-board process exposureCustom Interconnect

I followed wafer dicing, die attach, wire bonding and glob-top encapsulation as part of chip-on-board packaging.

Read my process experience

Cleanroom practiceCustom Interconnect

I worked with full gowning, ESD control and airborne particle monitoring to maintain ISO 14644-1 classification.

Read my cleanroom experience

3D & visualisation

Blender animationCano Water practice advert

I made a 21-second independent product animation in Blender to develop my modelling, materials, lighting and visual communication.

Watch my practice animation

Product renders & CGI advertisingJollymart

I produced creative in Blender, including a CGI spot used for a paid TikTok advert. My product images combined Blender modelling and rendering with Canva layouts.

Read my product-visualisation experience

Software & testing

Python debuggingCustom Interconnect

I used Python to test and debug a Tower of Hanoi implementation, working through move validation and state-handling logic.

Read my Python debugging experience

AI-assisted PWA developmentCravate

I developed Cravate with AI assistance as a single-file PWA with a Cloudflare Worker backend.

Explore how I developed Cravate

Recommendation testingCravate

In my £6 budget test, Cravate returned a £7.49 meal. I treated that as a failure and focused my changes on budget, cost, nutrition and simple assembly.

Read my recommendation test

Business & operations

Supplier negotiation & private-label launchJollymart

I negotiated price, minimum order quantity and specification directly with manufacturers, then checked supplier quality before committing to a bulk order.

Read my supplier-negotiation experience

Packaging & FBA labellingJollymart

I designed custom tamper-seal branding, Amazon FBA barcode labelling and an in-pack QR code.

Read my packaging work

Amazon & eBay operationsJollymart

I ran wholesale sourcing, a private-label product launch and day-to-day operations across Amazon, eBay and a website I built.

Read my marketplace experience

Advertising & launch analysisJollymart

I reviewed ad spend, competitive pricing and supplier defects to understand the launch’s loss drivers.

Read my advertising analysis

Bookkeeping & accountant liaisonJollymart

I prepared financial records for statutory filings. I redesigned the reporting format in 2026, and the accountant adopted it as the standard going forward.

Read my bookkeeping experience

Website building with BrizyJollymart

I built the company’s original website manually in Brizy.

Read my website-building experience

Aviation

Flight & airspace planningDrone operations

I plan flights against live airspace restrictions, including the Farnborough zone.

Read my drone-operating context

05 / Verification

Credentials & registrations.

Formal records where they add evidence; current operating registrations where they change what I can do.

Courses: Claude Academy: Claude 101 · Claude Academy: Claude Cowork.

UK Civil Aviation Authority · current

CAA-registered drone operator