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01 — About me

The story so far

Rafay Khan, Full-Stack Product Engineer
Rafay KhanFull-Stack Engineer @ Callture · Lahore, Pakistan

Istartedasafreelancer—fixingbugsandshippingMVPsforclientsonFiverrandUpwork.50+projectslater,alogisticscompanyinAustraliatrustedmeastheironlyengineertobuildtheirentireplatform:adminportal,customerportal,andadriverappwithliveGPS.SincethenI'veputasocialappontheAppStore,builtAIagentsthatqualifyleadsandbookappointments,anddesignedERPsystemsthatrunfactories.TodayI'maFull-StackEngineeratCallture,buildingGupshupTorontoacrossweb,iOSandAndroid.

years shipping production software
4+
freelance projects delivered
50+
countries — Australia, US, Pakistan
3
platforms from one engineer — web, iOS, Android
3

02 — Journey

Where I've done the work

Every role below shipped to real users. Most of them with me as the main engineer.

  1. Oct 2026 — Present

    Callture

    Full-Stack Engineer · Full-time

    • Building Gupshup Toronto end-to-end — a cross-platform product shipping as a web app and native iOS and Android apps.

    Current project

    Gupshup Toronto

    WebiOSAndroidLaunching soon

  2. Dec 2025 — Present

    Involvz

    Software Engineer & Automation Developer · Lahore, Pakistan · Part-time

    • Deliver software for international clients across healthcare, manufacturing, and e-commerce — owning projects end-to-end from architecture through deployment.
    • Owned Shopify development for Simply Trees — custom storefront features, compliance filtering logic, and backend integrations that replaced manual processes.
    • Built AI-powered intake and FAQ chatbots for healthcare clients (ABC Achieve, Jim The Handyman) that qualify leads automatically and sync them to company CRMs.
    • Designed and implemented a full ERP/CRM system in Odoo for Ittefaq Salt, covering manufacturing, inventory, purchasing, sales, and accounting.

  3. Mar 2025 — Present

    Word of Mouth

    Mobile Application Developer · Remote · USA

    • Own the full mobile engineering lifecycle for a production social platform on iOS and Android.
    • Built and shipped the app from scratch with React Native, Expo, and TypeScript — one codebase for both platforms.
    • Developed personalized content feeds and proximity-based discovery.
    • Independently manage push notifications, API integrations, releases, and App Store / Play Store deployments.

  4. Aug 2025 — Feb 2026

    Ferrati Sports

    Software Engineer · Contract · Remote

    • Built internal automation systems to improve outbound B2B sales workflows.
    • Developed data aggregation and lead-enrichment pipelines that replaced manual prospecting.
    • Integrated LLM APIs to generate personalized outreach at scale.

  5. Aug 2023 — Jul 2025

    Direct Transport Solutions

    Full-Stack Engineer · Remote · Australia

    • Sole engineer responsible for designing, building, and maintaining the company's core logistics platform.
    • Built the complete platform: internal Admin Portal, Customer Portal, and a React Native Driver app.
    • Implemented real-time GPS tracking over WebSockets so dispatchers and customers can follow drivers live.
    • Designed the database and access-control model with PostgreSQL and Supabase Row-Level Security.

  6. Client project

    NodusTickets

    Lead Engineer · Client: Gallo

    • Designed an offline-first SaaS ticket validation platform that prevents fraud even without internet connectivity.
    • Built cryptographically signed QR validation (Ed25519) on a Fastify backend — tickets can't be forged or reused.
    • Implemented hash chaining to protect locally stored validation records against tampering.

03 — Beyond code

Off the keyboard

The stuff that doesn't go on a résumé, but shapes how I work.
Boxed at UMT

Boxing

The ring taught me what production teaches: stay calm when you get hit, keep your guard up, and outlast the problem.

Always reading

Philosophy

I read philosophy to think more clearly. It's why I ask "why are we building this?" before "how".

“The impediment to action advances action. What stands in the way becomes the way.”
— Marcus Aurelius

04 — Toolkit

The stack I reach for

BS Computer Science · University of the PeopleDevOps Professional · PagerDuty CertifiedAI Automation Engineer · Tech7 Automation
TypeScriptJavaScriptPythonSQLReactNext.jsReact NativeExpoTailwind CSSShopify LiquidNode.jsFastifyExpressRESTGraphQLWebSocketsPostgreSQLSupabaseMongoDBSQLiteFirebase
pgvectorOpenAIClaudeGeminiLangChainRAGn8nVapiRetellDockerAWSGCPTerraformGitHub ActionsExpo EASVercelHubSpotGoHighLevelSalesforceOdooZoho
Languages
TypeScript, JavaScript, Python, SQL
Frontend & mobile
React, Next.js, React Native, Expo, Tailwind CSS, Shopify Liquid
Backend
Node.js, Fastify, Express, REST, GraphQL, WebSockets
Data
PostgreSQL, Supabase, MongoDB, SQLite, Firebase, pgvector
AI & automation
OpenAI, Claude, Gemini, LangChain, RAG, n8n, Vapi, Retell
Cloud & DevOps
Docker, AWS, GCP, Terraform, GitHub Actions, Expo EAS, Vercel
CRM & ERP
HubSpot, GoHighLevel, Salesforce, Odoo, Zoho

05 — What's next

Got an idea?
Let's ship it.

Tell me what you're building. No sales team, no hand-offs — just the engineer who'll build it.

Rafay KhanRafay KhanYou'll talk to me directly
—in Lahore · UTC+5
Replies in a few hoursUsually around now
Start a conversation
rafaykhan.mesh@gmail.com