Engineering Products. Automating Workflows.
Hi, I am Abu Shahama Khan. I am the founder and lead mechanical design engineer at Arrant Engineering Solutions.
For the past 14 years I have provided end-to-end mechanical design — from solid modeling and heavy structural weldments to precision sheet metal and IP-rated enclosures. I have engineered solutions across regulated and demanding industries, including FDA-regulated medical devices, maritime defense infrastructure under DNV/ABS, industrial and mining equipment, and consumer IoT products.
A focus on Design for Manufacturing.
My engineering philosophy is straightforward: a CAD model is only useful if it can be built on the shop floor. I design with standard tooling, real material behavior, and fabrication realities in mind, and I apply ASME Y14.5 GD&T rigorously on every drawing package. Most of the work I am hired to do involves catching manufacturing issues at the CAD stage, before they become expensive prototype rework.
From designer to automation builder.
A few years into the work, I noticed how much of every project was spent on the same repetitive tasks: updating drawings, batch-exporting PDFs, renaming files, and tracking changes across massive assemblies. Senior engineers were burning hours on work that should have taken minutes.
I learned the SolidWorks API and started writing the code to automate it.
Today my freelance practice runs on two pillars. I design mechanical products that ship. And I build the C# add-ins and VBA macros that let other engineering teams ship faster. That dual experience is also what led me to build my own product, Design Co-Pilot — a Pack-and-Go assembly comparison and audit tool for SolidWorks.
Top 30 SolidWorks Freelancer on Freelancer.com.
I have been a verified Preferred Freelancer on Freelancer.com since 2010. Across 14+ years on the platform, I am currently ranked in the Top 30 of SolidWorks freelancers.
That ranking is built on a track record I work hard to protect:
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300+
clients across 50+ countries
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4.8 / 5.0
rating across 205+ verified reviews
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99%
on-budget delivery
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87%
on-time delivery
Credentials and capability stack.
I work to the manufacturing standards and compliance frameworks my clients are accountable to.
Standards and Compliance
- — ASME Y14.5 GD&T — Certified
- — Medical and Food: ISO 13485, FDA, NSF / ANSI
- — Maritime and Structural: DNV, ABS, IMO, DIN
- — Electronics and Enclosures: ISO 9001, UL, CE, FCC, IP54 / IP65 / IP67
Mechanical Design
- — Solid modeling and parametric design
- — Heavy structural weldments with FEA validation
- — Sheet metal and CNC-machining DFM
- — Large SolidWorks assemblies (proven on 8,759 components)
- — 2D-to-3D conversions and patent-grade technical drawings
SolidWorks Automation
- — C# / SolidWorks API add-in development
- — VBA macros for repetitive workflows
- — Batch processing — drawings, PDFs, DXFs, BOMs
- — Pack-and-Go automation, file-rename utilities, and workflow audits
- — Production-ready add-ins with custom ribbons, dialogs, and persistent settings — packaged for IT-friendly deployment
Let's build something better.
Whether you need an IP65 enclosure designed from scratch, a structural weldment engineered for DNV compliance, or a custom SolidWorks add-in to save your drafting team 20 hours a week — I can help.
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