Muhammad Zain

AI-Augmented | Full Stack Web Developer

zainjoyia16@gmail.com
+92 313 0006170
Lahore, Pakistan
linkedin.com/in/muhammad-zain-504b34217
www.zain-dev.com

Professional Summary

Full Stack Web Developer with 4+ years of experience building secure, scalable, high-performance web applications. Deep expertise across the React, Next.js, and TypeScript ecosystem, with equally strong backend experience in Ruby on Rails and cloud infrastructure on AWS. Uses AI-assisted tooling to raise engineering velocity while maintaining a security-first mindset, backed by a Google Cybersecurity Specialization.

Skills

Frontend

  • • React.js, Next.js (App Router, SSR/SSG)
  • • TypeScript, JavaScript (ES6+)
  • • Tailwind CSS, HTML5, CSS3
  • • Web Performance & Core Web Vitals

Backend

  • • Ruby on Rails
  • • REST APIs, API Integration
  • • MVC Architecture

Cloud & DevOps

  • • AWS (EC2, S3, CloudFront)
  • • CI/CD Pipelines, GitHub Actions
  • • Git, GitHub, Vercel, Heroku

Analytics & Observability

  • • PostHog (event tracking + SQL analytics)
  • • Google Tag Manager (GTM)
  • • Google PageSpeed Insights / Lighthouse

Security & Testing

  • • Playwright, Unit & E2E Testing
  • • OWASP Top 10
  • • Google Cybersecurity Specialization

AI Development

  • • Claude (Claude Code), Cursor
  • • Model Context Protocol (MCP)
  • • Prompt Engineering
  • • AI-integrated development workflows

Experience

Software Engineer

09/2022 – Present

Deltalabs – Lahore, Pakistan

  • • Led the migration of a legacy React (CRA) e-commerce/telehealth platform to Next.js — rebuilt marketing/landing pages, the multi-step checkout funnel, and account workflows on SSR/SSG rendering, cutting page payloads by up to 95% (685 KB to 28 KB gzipped).
  • • Hardened Core Web Vitals post-migration — decoupled the LCP element from client-side loading state and deferred third-party script loading (GTM/analytics) behind user interaction, recovering PageSpeed scores from the 70s to 90s+.
  • • Owned production reliability for the platform — guaranteed SSR/hydration integrity and cross-browser compatibility, extending consistent support across modern and legacy Safari/iOS devices.
  • • Established data-driven observability using PostHog (event tracking + SQL analytics), protecting checkout conversion by proactively surfacing and eliminating revenue-impacting issues in the purchase funnel.
  • • Upgraded Ruby (2.7.1 → 3.3.7) and Rails (to 7.2.3) across the production codebase, closing security gaps and unblocking modern gem/toolchain compatibility.
  • • Managed AWS infrastructure end-to-end — provisioned and maintained EC2 instances for application hosting, organized S3 buckets for static assets and backups, and configured CloudFront distributions (including cache invalidation) to cut latency and bandwidth costs.
  • • Built a Playwright E2E test suite covering the core purchase funnel, catching regressions before deploy and reducing production defects.
  • • Adopted AI-assisted development tooling (Claude Code, Cursor, MCP) to speed up refactors and routine implementation work, increasing engineering velocity by roughly 40%.
  • • Collaborated within Agile Scrum teams and mentored junior developers on frontend and backend best practices.

Certifications

Google Cybersecurity Specialization

Education

BS: Aviation Management

10/2017 – 10/2021

University of Management and Technology

Lahore, Pakistan