Mechatronics engineer · Product engineer
Jiovanny
Adel
Marketplace and business software, built front to back. Currently building BETK and B2S, in Cairo.
Mechatronics engineer · Product engineer
Jiovanny
Adel
Marketplace and business software, built front to back — from the interface down to the permission model.
Cairo, EgyptAvailable for roles & projectsEngineer since 2009Arabic & English
The opening sequence is a real-time 3D simulation, rendered in your browser.
Front to back
Precision on both sides of the stack.
I trained as a mechatronics engineer, where a system either works under real load or it does not. That standard came with me into software, and it is why I specify before I build.
Nothing reaches the data without passing validation and a per-row permission check. That is the part of the design I spend the most time on.
Arabic first, not translated
Full right-to-left layout with a bilingual toggle, designed from the first wireframe rather than retrofitted onto an English page.
Permissions designed, not patched
Row-level security enabled and default-deny on every table, with four roles separated at the database rather than in application code.
Specified before built
Business rules catalogued and numbered, the data contract frozen before a page is drawn, and a reviewer pipeline checking each phase against those documents.
Building now
Two products in development, one delivered practice.
In development
BETK
A verified storefront for Egypt's informal WhatsApp and Instagram sellers. Phone-OTP identity, admin-reviewed verification, Arabic-first listings, neighbourhood search, and a custodial split payment — deposit up front, balance on delivery — with reviews, seller levels and mediated disputes.
In development
B2S — Brand to Shelf
A multi-tenant, white-label platform for packaging and business management. Six standalone HTML tools built for a single brand are being consolidated into one tenanted application that other brands run under their own identity.
Open the live preview
In development
Reviewer surface
The review layer behind both products. It issues verdicts, authors frozen documents, emits task prompts, tracks carry-forwards and owns phase sequencing — and writes no code itself. It is how a one-person team keeps two products honest against their own specifications.
Row-level security
Every table denies by default; access is granted by explicit policy, enforced in the database rather than trusted to the application.
Bilingual by construction
Arabic and English with a full RTL mirror, and left-to-right islands preserved for digits and references.
Delivered
Registration & tracking systems
Bespoke administrative and operational systems replacing manual processes with something structured and auditable.
43Tables specified
Scope, before the first commit
The whole system existed on paper before any of it existed in code.
Fifty-nine pages wireframed, four roles separated, every business rule given an identifier and mapped to the layer that enforces it — database constraint, policy, trigger or validated server action. That document is what the reviewer pipeline checks against.
59Pages designed
4User roles
AR/ENFull RTL
6→1Tools consolidated
5 yrsIndependent work
Technical data
What I work with.
- Languages
- TypeScript · JavaScript · C / C++ · MATLABPlus SQL against Postgres
- Frontend
- React · Next.js 15 · ViteRight-to-left layout, bilingual interfaces, single-file tooling
- Backend
- Supabase · Postgres · Auth · StorageRow-level security enabled and default-deny on every table
- Validation
- Zod-validated server actionsEvery action and route validated before it reaches the database
- Deployment
- VercelEdge delivery, preview environments per branch
- Observability
- Sentry · PostHogError tracking and product analytics on the key funnels
- Engineering
- Automation & control systems · Embedded systemsPLC programming on Siemens S7-300, CNC lathe programming
- Vision
- Computer visionApplied within automation and inspection contexts
- Operations
- Business operations · Process optimisationProcurement, supply chain, business development, negotiation, leadership
- Languages spoken
- Arabic (native) · English (fluent)
Background
Trained on machines. Applied to software.
- 2004 – 2009
- BSc Mechatronics EngineeringAin Shams University, Cairo
- Postgraduate
- Master's programme, Engineering–MechatronicsAin Shams University, Cairo
- Training
- PLC S7-300, basic and advancedSiemens programmable logic controllers
- Training
- Industrial and advanced industries trainingIncluding engine systems
- 2021 – 2026
- Independent systems developerRegistration, tracking and process automation systems for clients
Get in touch
Open to roles and projects.
Email—
GitHubgithub.com/Jovo-Jovi
LinkedInJiovanny Adel
Live previewb2s-brand-to-shelf.vercel.app
WhatsAppMessage directly
Phone+20 155 055 4454
LocationCairo, Egypt