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Title: GemCraft — Business Management System
Description: Desktop application built in Java and MySQL for managing inventory, customers, and orders for a small business.
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Open to new work — full-time or contract.
I'm a full-stack engineer with 6+ years of experience, working with TypeScript across the stack. Most of that time has been spent embedded in a small number of products for years at a time, rather than rotating between short gigs — which means I've owned things long enough to live with my own decisions.
What I build:
AI/LLM products — tool-calling agent workflows that act on results autonomously, retrieval-grounded generation over large corpora, structured outputs with validation, and evaluation against real outcomes. Built in-house, with the model provider behind a service boundary so routing stays swappable.
Payments — Stripe Connect and Subscriptions in production: recurring billing, plan changes, usage-based charges, marketplace payouts, and webhook-driven reconciliation so the ledger stays accurate when events arrive late, twice, or out of order.
Integrations — 15+ third-party APIs including Amazon Seller/Vendor Central, Google, and Microsoft Graph behind one normalized interface, cutting integration time by ~40%.
Real-time & scale — WebSocket services maintaining consistent state for thousands of concurrent users, with reconnection and out-of-order delivery handled explicitly.
Stack: TypeScript · React · Next.js · Node/Express · PostgreSQL · Redis · AWS · Docker · CI/CD. Claude Code and MCP tooling are part of my daily workflow.
If you're shipping something early-stage and need someone who can take a feature from schema to production without a handoff, my DMs are open.
good luck in your job search Ali
Working on a simple portfolio to showcase my recent projects. Built in Figma ported to Framer. https://rmackay.framer.website/
This looks so good! 👏
I’ve just completed Invoice Manager — a production-ready Windows desktop application built with .NET 10, C#, WPF, MVVM, EF Core and SQLite.
The application covers the full workflow from quotation to payment, including:
• customer and service management
• quotations and invoices
• quote-to-invoice conversion
• partial and full payments
• PDF generation
• dashboard reporting
• historical document snapshots
• automated testing and CI
The project was built with Clean Architecture and includes 97 automated tests, a self-contained Windows release, technical documentation and architecture decisions.
This project gave me a chance to work not only on the UI, but also on business rules, persistence, transactional workflows, testing and release engineering.
#dotnet #csharp #wpf #softwaredevelopment #desktopapp #cleanarchitecture
github.com
GitHub - Staniek-Tech-NL/invoice-manager: Local-first quotation and invoicing application for Windows built with .NET 10, WPF and Clean Architecture.
Local-first quotation and invoicing application for Windows built with .NET 10, WPF and Clean Architecture. - Staniek-Tech-NL/invoice-manager