Senior full-stack developer for startups
Senior Full-Stack Engineer - Startup Product Lead
I help startups launch and scale
Full-stack developer with 4+ years of experience building scalable applications using MERN, Next.js, and React Native - focused on performance, UX, and business outcomes.
- Performance-first architecture for product-led growth.
- Full ownership from MVP to scale with clean, reusable systems.
- UX decisions aligned with business outcomes.
60%
faster load times
3 weeks
MVP launch windows
Growth
engagement and conversion lifts
Based in Pakistan - Working with global startups
About
Building products that scale with your startup
I'm Hasnain Qureshi - a full-stack web developer helping startups and businesses build high-performance web and mobile applications that scale smoothly and look great.
With 4+ years of experience across MERN Stack, Next.js, and React Native, I've led projects from concept to launch - delivering clean, maintainable code and user-friendly experiences.
I focus on solving real business problems through thoughtful architecture, performance optimization, and strong UX decisions.
60%
reduced load times
3 weeks
MVPs launched
Growth
improved engagement and conversions
Stack
Focused on performance-first product engineering
Frontend
- React.js
- Next.js
- Modern CSS and Tailwind
- Performance optimization
Backend
- Node.js
- Express
- MongoDB
- REST and GraphQL APIs
Mobile
- React Native
- Cross-platform apps
- App performance tuning
- Native integrations
Cloud and Tools
- AWS
- Firebase
- DigitalOcean
- Git and CI/CD
Services
Outcome-driven services for startup teams
High-Performance Web Applications
Fast, scalable, conversion-focused web products.
Startup MVP Development
Idea to production in weeks with clean architecture.
Mobile App Development
Cross-platform apps using React Native.
Technical Consulting
Architecture, performance, and scaling guidance.
Process
A clear path from idea to scale
Senior delivery steps that keep founders aligned and shipping fast.
01
Discovery + Scope
Define goals, KPIs, and risks so build time stays focused.
02
System Design
Architecture, data model, and UX flows ready for scale.
03
Build + Iterate
Rapid delivery with milestones, demos, and tight feedback loops.
04
Launch + Optimize
Performance tuning, analytics, and conversion improvements.
Tools
Technologies I ship with
Design systems, frontend frameworks, backend services, and cloud tooling used across my builds.
Projects
Selected product work
Reviews
What clients say
Selected feedback from Fiverr and past clients - real results and reliable work.
Resume
Snapshot of senior capabilities
Core Strengths
- Full-stack delivery across web and mobile
- Performance optimization and scalable architecture
- Product UX decisions tied to business outcomes
- Mentoring teams and leading delivery
Industries + Product Types
- SaaS platforms and dashboards
- Conversational products and lead systems
- Startup MVPs and go-to-market builds
- Consumer mobile apps
Availability
Open to select startup engagements and long-term product builds.
Let's build
Need a senior engineer to ship fast?
Share your goals and I'll map the fastest path to launch.
Experience
Senior product engineering experience
Technical Lead - Vurks
Led end-to-end technical direction from concept to launch, designing scalable architectures and mentoring developers.
Senior Software Engineer - ChatKnot
Built real-time systems, scalable APIs, and multi-tenant platforms powering conversational products.
Web Developer - Fiverr
Delivered fast, reliable solutions, building long-term client trust through speed and quality.
Contact
Let us build something great
Tell me about your product, goals, and timeline. I respond fast and focus on practical next steps.