H M Hasnain
Full Stack Developer | Product Builder
I design and develop scalable digital products for startups and businesses, focused on growth, performance, and user experience.
50+
Projects Built
5+
Years Experience
30+
Happy Clients
⚡ Working with a limited number of serious founders and teams
🚀 Building scalable digital products with modern startups
⏱️ Typically replying within 24 hours
How I Work
Discovery
Understand your goals, target users, and technical requirements
Strategy
Design solution architecture and technology stack
Development
Build, test, and optimize for performance and reliability
Launch
Deploy, monitor, and iterate based on real user feedback
Skills & Technologies
Frontend Engineering
React, Next.js, TypeScript, Tailwind CSS — building fast, scalable, production-grade UIs
Mobile Development
React Native & Flutter — cross-platform apps with smooth UX and native performance
Backend Systems
Node.js, NestJS, Express, Django — building scalable APIs and server architectures
Database Design
PostgreSQL, MongoDB, Redis — optimized data modeling and performance-focused queries
Cloud & DevOps
AWS, Docker, CI/CD pipelines — deployment automation and scalable infrastructure
Testing & Quality
Jest, RTL, Cypress — ensuring reliability through automated testing strategies
UI/UX Design
Figma, design systems, and UX principles for clean and intuitive user experiences
API & Integrations
REST, GraphQL, WebSockets — real-time and scalable system integrations
Professional Experience
Full Stack Developer
Monesave
Jan 2024 - Present
- Built fintech product supporting wearable contactless payments with real-time transaction flow
- Led full-stack development across Next.js and NestJS, improving system performance and scalability
- Optimized API structure and code quality, reducing production bugs and improving reliability
Mobile Developer
Technology Castle
Jan 2023 - Dec 2023
- Developed cross-platform mobile applications with strong focus on UX and performance
- Improved delivery cycles by introducing reusable architecture patterns
- Collaborated with designers and backend teams to enhance product consistency and stability
React Native Developer
ZAMHTECH
Jan 2021 - Dec 2022
- Built multiple production mobile apps with focus on performance and responsiveness
- Improved user engagement through optimized UI flows and better state management
- Reduced UI inconsistencies by introducing structured component architecture
Real-World Products I've Built
A selection of digital products focused on performance, scalability, and user experience.
Built for startups, founders, and product teams
Frequently Asked Questions
What's your typical project timeline?
Most projects take 4-16 weeks depending on scope and complexity. I provide detailed timelines during the discovery phase after understanding your requirements.
Do you work with startups?
Yes! I specialize in working with startups and early-stage companies. I understand the constraints and help build scalable products efficiently.
What's your tech stack?
I work with modern technologies: React/Next.js for frontend, Node.js/NestJS for backend, PostgreSQL/MongoDB for databases, and AWS/Vercel for deployment.
Can you help with existing codebases?
Absolutely. I can audit, refactor, optimize, and scale existing applications. Many clients hire me to improve performance or add new features.
How do we stay in sync?
I maintain regular communication through weekly calls, detailed documentation, and transparent progress updates. You're never in the dark about your project.
What if I need ongoing support?
I offer maintenance and support packages after launch. Whether you need bug fixes, feature additions, or optimization, I'm available.
