3+ years of shipping production software — from startup MVPs to enterprise platforms. Each role sharpened a different edge of the stack.
Mid Level Full Stack Developer
Zerowl
Karachi, Pakistan
Sep 2024 - Present
Full-stack development of ZerOwl EASM an enterprise attack surface management platform helping businesses identify and mitigate security vulnerabilities in real time.
Key Achievements
Core EASM modules delivered with modular architecture, reducing feature rollout time
Secure auth and authorization layer protecting enterprise client data
Role-based access control (RBAC) enabling granular team permissions for clients
Logging and monitoring system providing proactive issue detection before client impact
React
Node.js
Nest.js
Next.js
MongoDB
Express
MySQL
MERN Stack React Native Developer
Async Technologies
Karachi, Pakistan
Jan 2024 - Aug 2024
Web and mobile development across multiple client projects Next.js web apps, an AI-powered Discord game, and 3 cross-platform mobile applications shipped to both app stores.
Key Achievements
AI-powered Discord game launched, driving user engagement through Claude integration
3 React Native apps delivered to iOS and Android, serving end users on both platforms
Performance optimizations resulting in faster load times and smoother UX across all projects
React Native
Next.js
React
Node.js
MongoDB
Express
React Native Developer (Project Based)
Zytech Limited
Remote
Nov 2023 - Jan 2024
Cross-platform mobile app for Zytech Limited a location-based mosque finder with real-time prayer notifications, helping users discover nearby mosques and stay on schedule.
Key Achievements
Geolocation-based mosque finder giving users instant access to nearby prayer locations
Social login integration reducing signup friction and improving onboarding rates
Push notification system keeping users informed of prayer times without manual checks
React Native
Node.js
MongoDB
Express
React Native Developer (Project Based)
Tech On Ventures
Remote
June 2023 - Sep 2023
Cross-platform video streaming app for Tech On Ventures a YouTube-style platform with multi-language support, offline downloads, and high-quality playback powered by JWPlayer.
Key Achievements
Video streaming platform launched on iOS and Android, reaching users across multiple regions
Multi-language localization enabling content access for a diverse user base
Offline download capability letting users watch content without internet connectivity
JWPlayer integration delivering smooth, high-quality video playback at scale
React Native
JW Player
Localization
API Integration
Authentication
React Native Developer
Matrix Technologies
Karachi, Pakistan
Jan 2023 - May 2023
Mobile app development at Matrix Technologies shipping e-commerce, social media, and utility applications to end users across iOS and Android platforms.
Key Achievements
E-commerce app with integrated payment gateway, enabling seamless transactions for customers
Social media service app driving user engagement through interactive features
Critical bug resolution across multiple projects, improving app stability for end users
Utility and productivity tools built from scratch, expanding the company's product offering
React Native
Expo
MongoDB
Express
React
Node.js
Firebase
Shaheer Shahzad — Senior Full-Stack Developer Professional Experience
Shaheer Shahzad is a Senior MERN Stack Developer and React Native Engineer based in Karachi, Pakistan with 3+ years of professional experience. Currently working as a Senior Full-Stack Developer at ZerOwL Cybersecurity, building enterprise-grade security platforms and dashboards.
Career Highlights
Experienced in delivering production software across web and mobile platforms. Proven track record of building scalable applications using Next.js, React.js, React Native, Node.js, NestJS, Express.js, TypeScript, MongoDB, MySQL, TailwindCSS, and Socket.io. Skilled in system architecture, API design, database optimization, real-time applications, and agile development workflows.
Work History
Senior Full-Stack Developer at ZerOwL Cybersecurity — building enterprise security products, cybersecurity dashboards, and threat monitoring platforms. Previous experience includes e-commerce development, SaaS product engineering, mobile app development, and backend API architecture for multiple clients and startups.
Availability
Open to full-time, contract, and remote opportunities worldwide. Available for MERN Stack development, React Native projects, Next.js applications, API development, and technical consultation. Contact: contact@shaheershahzad.com.
