Integration reliability lab
Webhook debugging, replay safety, provider-specific diagnosis, and incident artifacts for external integrations that fail in messy real-world ways.
ar27111994.dev · Rawalpindi, Pakistan
I’m Ahmed Rehan — a full-stack engineer and solo builder working like a small developer lab: shipping practical tools, tightening reliability, documenting the system, and taking selective freelance work where devtools, webhooks, automation, or AI-agent workflows need clear structure.
Public GitHub metrics update in-browser when available.
A focused bench for tools, systems, proof surfaces, and selective client work — practical experiments that can become reliable products.
Webhook debugging, replay safety, provider-specific diagnosis, and incident artifacts for external integrations that fail in messy real-world ways.
Reusable skills, prompts, host-aware agent assets, and lifecycle tooling so AI-assisted development does not become another dumping ground.
Small internal tools, scripts, dashboards, and workflow utilities that are observable, maintainable, and boring in the right places.
Portfolio, docs, launch pages, resumes, and proof surfaces polished for speed, clarity, accessibility, SEO, and trust.
Live product evidence from the places where the work is actually happening: repos, launch surfaces, docs, and systems that can keep growing into paid tools.
Priority #1 · Agent tooling
Node.js / TypeScript CLI for discovering, staging, activating, and wiring reusable AI-agent assets across VS Code/Copilot, OpenCode, Cursor, Zed, Claude Code, and Pi.
Priority #2 · Webhook tooling
Enterprise-grade webhook testing suite for capturing, inspecting, replaying, forwarding, validating, and mocking webhook traffic in real time without persistent tunnels.
Priority #3 · Design-to-code agents
AI-agent skill for creating, auditing, and maintaining Penpot design systems, prototypes, tokens, and design-to-code workflows via MCP.
Agent skill curation
Curated collection of 200+ agentic skills for Claude Code / Antigravity / Cursor-style AI-agent workflows.
Supporting work that shows range beyond the headline tools: visual systems, challenge builds, mobile context products, and data-quality workflows.
Open-source color palette generator focused on WCAG-aware visual tooling, typography, UX research, and zero-cost infrastructure.
Google I/O 2026 Code the Countdown challenge project using TypeScript, React/Next.js, canvas, motion, Web Audio, and WebGL-oriented UI work.
Android-first call-time context and relationship notes product focused on useful, practical in-call context.
Data quality and ETL validation product direction for CSV, Excel, JSON, and structured-data workflows.
Recent launch notes, technical posts, and repository activity pulled from public surfaces when available. The curated fallback stays useful even when third-party APIs are slow or blocked.
Freelance proof surface
A client-facing view of Upwork work history: recent developer-tool projects first, with older frontend, CMS, e-commerce, dashboard, and integration work kept as supporting evidence.
The Upwork surface is being tightened around practical engineering outcomes: webhook/API debugging, internal tools, automation-heavy products, developer tooling, and reliable async delivery.
Best fit for teams that need a practical builder who can turn messy workflows into usable, documented software.
Clear written updates, concrete demos, and handoff-friendly work instead of vague progress reports.
A long work trail spanning devtools, enterprise frontend, CMS/e-commerce, dashboards, integrations, and product surfaces.
Newest featured profile work, emphasizing developer tools, AI-agent workflows, webhooks, and polished public surfaces.
Open-source webhook debugging suite for capturing, inspecting, replaying, forwarding, validating, and mocking webhook traffic.
TypeScript CLI for discovering, staging, activating, and wiring reusable AI-agent assets across modern coding hosts.
Fast Astro portfolio/resume site that turns scattered proof, links, case studies, and contact paths into one client-ready surface.
Agent workflow kit for creating, auditing, and maintaining Penpot design systems, prototypes, tokens, and design-to-code handoff.
Eagle 6 is a cybersecurity product that secures large enterprises by detecting unknown vulnerabilities before they expose systems to risk. My primary role included the…
www.eagle6.comMy Client wanted me to develop a small app with the following features: - form on 2 pages ( 1 form for MM/YYYY, weight, height; 1 form for satisfaction score) - form…
Created a Microsoft Remote Desktop Services project with Citrix App Layering on Azure Integration, learning everything as I went along with the project. The final impl…
My client wanted to have a donation form integrated with Mastercard International Gateway Service with full validation checks, Google Captcha Verification all with a s…
payment.acs.sch.ae/donate.htmlMy client wanted to present a responsive thumbnail grid of some specified post categories and some specified posts on the Homepage. The client also wanted special an i…
aljibouri.coHad to Convert Non-text a PDF File to Responsive HTML5, so that it could be sent as an HTML Email with some Links in it. Therefore, to achieve this, I converted the PD…
My client asked me to test out different payment gateways for their Australian Woocommerce Store and after some testing and consideration, we settled on PayPal Merchan…
directsoftwareoutlet.comMy client wanted to increase page load speed of their website. To achieve this goal, I optimized website's images, improved server caching, added expire headers for di…
jmgarts.comMy job was to fix some bugs, modify some features and to add some new modules/features into CRM System. Following is the list of instructions that were given to me by…
upwork.ar27111994.comThe task was to create a video conferencing web application exactly like https://appr.tc/, but with a database-backend to store the currently active and non-active roo…
webrtc.ar27111994.comThis is my personal E-Commerce venture. Therefore, I have done everything ranging from Business Idea Generation, Branding and Logo Design to Web Development, Social Me…
gogglehunt.comHad to develop an Admin Panel based Customer Subscription Management System with Authorization and Reporting for a Television Subscription Provider.
subs.ar27111994.com/adminHad to convert a static HTML template into a similar Wordpress theme and in the process creating custom post types, custom post meta fields and the custom template for…
pharmacy.ar27111994.comHad to develop a Complete Admin panel based solution for a small shop in a very limited timeframe alongside complete user groups and permission based authentication sy…
fiverr.ar27111994.com/admin/Had to fix an Enterprise grade Dental Care Application in multiple phases.
nubrace.comHad to Fix and Modify Checkout Page Forms.
guitarhangar.comHad to create an Opencart MOD for separate product template and Cart Button based on The top most (root) Parent Product Category of the Product. In addition, I had to…
www.tctouch.co.ukMy Client wanted the following customizations to his opencart website: 1)Shopping Flow is as follows When a customer clicks on Add To Cart the products will enter…
fitfugitives.comThe welcome message I had to develop a WordPress Plugin that is a THANK YOU plugin that will work similar to this one: http://wwwthanksforcaring.ca/. This will be ad…
freelancer.ar27111994.com/tfcConversion of HTML Template to Wordpress in a very limited timeframe along with the development of custom fields search filter.
Had to develop a custom fields filter widget that uses wc fields factory plugin's custom fields with support for pdf export of the filtered results.
www.iqrabookagency.com.pkI had to Set Up the theme and do customization of the opencart's product filter module and customize template according to the client's demands.
asaandukan.pk/opencartAn Online Cloud Storage Platform that enables you to create, update, share and secure your data without compromising on portability.
github.com/ar27111994/UDrive-Cloud-StorageA Shopping website built with wordpress for a local table tennis accessories and equipment store.
www.maksportsgoods.comAn application that translates an alphanumeric phone number entered by the user into a numeric phone number, and then calls that number.
github.com/ar27111994/PhoneWordAndroidAppA full featured online bookstore built from scratch with admin panel. Features: Related Products, User Management, Order Fulfillment, Mobile friendly product slider an…
github.com/ar27111994/bookstoreShopping Cart Library: Version 1.0 | Copyright (c) 2015 - 2016, University Institute of Information Technology | (UIIT-UAAR) Currently used by hundreds of users on php…
github.com/ar27111994/ShoppingCartLibraryv1.0Worked on customization of a School Management System based on customer's demands within limited timeframe.
dev1.gminns.com/smsGot Position in a Logo Design Competition for Topcoder Open.
A Console Based Hotel Reservation System built with C++
github.com/ar27111994/Hotel-Reservation-System-C--File-BasedA website for a Regional Newspaper made Using Wordpress. http://dailyjammukashmir.org/
dailyjammukashmir.orgA parallax Garments Store Website built with OpenCart. Also contains a Companion Blog.
wecanwear.comMy client wanted a Website to Showcase the services provided by his Printing Shop I created the website using WordPress. Moreover, he wanted to showcase his products…
www.goldenpointprint.comAn Open Source, Community based and Intelligent Supply Chain Management System built for the Cloud.
github.com/ar27111994/OpenBiz.gitA WCF Sample project focusing on N-Layered Architecture and Multi-threading best practices.
github.com/ar27111994/National-Criminals-DatabaseMy submissions for some logo competitions throughout the years.
Full profile remains the source of truth for contracts, reviews, and Upwork-native project pages; this section packages the work trail for faster scanning.
Verifiable background signals: certifications, partner identity, older shipped projects, and founder/operator work that still supports the current devtools and automation direction.
Lightweight ways to support the public lab: maintenance, docs, product experiments, and faster shipping on open-source tools.
For direct sponsorship/partnership, email admin@ar27111994.dev or use WhatsApp.
The recurring work pattern across the portfolio: practical tooling, integration reliability, automation, agent workflows, performance, and production-minded delivery.
Primary surfaces for technical credibility, client trust, launch proof, and community history. Discord: ar27111994.
Three focused exports for different hiring contexts: full depth, client-facing project work, and a fast one-page scan.
Direct routes for project briefs, partnership context, and faster async follow-up.