CURRICULUM VITAE
A structured breakdown of my journey across development and strategy.
S.M. Kamrul Hasan Kallol
Dhaka, Bangladesh|+880 1831 624571|kallol.business.ds@gmail.com
kallol.me|linkedin.com/in/kamrul-hasan-dev|github.com/kallolx
Summary
Full-stack developer with 5+ years of experience building high-performance web and mobile applications. Skilled in React, Next.js, Node.js, and React Native, with a focus on clean code, UI/UX excellence, and business-driven results. Passionate about solving real-world problems through technology.
Technical Skills
- Languages & Frameworks: JavaScript, TypeScript, Next.js, React.js, React Native, Flutter, Node.js, Express.js.
- Databases & State Mgmt: MongoDB, PostgreSQL, MySQL, Redis, Firebase, Supabase, Redux Toolkit, Zustand.
- DevOps & Tools: Docker, AWS (S3, EC2), GraphQL, Prisma, TailwindCSS, Git.
Experience
Lead Developer — Jamil Ifat Production
Remote, UK | Jan 2024 – Present- Architected a high-traffic restaurant reservation ecosystem, achieving sub-100ms latency for real-time data sync between web and mobile clients.
- Engineered a custom React Native app used by 50+ restaurant owners, increasing administrative efficiency by 30% through live analytics dashboards.
- Constructed a scalable Node.js/MongoDB backend capable of handling 500+ concurrent connections, ensuring 99.9% uptime for community interactions.
- Orchestrated automated deployment pipelines on AWS, reducing release cycles by 40% while maintaining strict security protocols.
Full Stack Web & Mobile App Developer — Webbyte Studios
Remote | 2023 – 2025- Delivered 30+ full-scale MERN projects and 10+ mobile apps, consistently meeting strict performance targets and driving a 20% increase in client retention.
- Directed development of 10+ cross-platform apps, cutting development time by 50% by implementing shared React Native & Flutter component libraries.
- Managed cloud infrastructure on VPS/AWS for international clients, ensuring zero downtime during high-traffic promotional events.
Freelance Full Stack Developer — Independent Projects
Global & Local | 2020 – Present- Launched 50+ production-grade web solutions, optimizing page load speeds by 35% via Next.js server-side rendering and efficient caching.
- Designed and maintained mobile applications with active user bases, providing long-term support that reduced bug reports by 60% post-launch.
Key Projects
Aprtiv (Jamil Ifat Production) | Next.js, React Native, Node.js, MongoDB
Live Link- A social web and mobile platform for exploring and reviewing local restaurants.
- Highlights: Location-based recommendations, social feed with media sharing, user authentication.
Music Distribution Dashboard | Next.js, Node.js, MongoDB, AWS S3
Live Link- A creator-focused dashboard for uploading, managing, and monetizing music.
- Highlights: Track analytics, automated royalty reporting, secure AWS S3 storage.
Dubai Pest & Services Management | React, Node.js, MySQL, Stripe
Live Link- A scheduling and management solution for businesses offering multiple on-demand services.
- Highlights: Real-time booking, automated reminders, role-based access for staff and clients.
Webify - Multi-Tenant SaaS Platform | Microservices, Node.js, AI/LLM
Live Link- A multi-tenant SaaS e-commerce platform supporting unlimited stores per tenant.
- Highlights: Isolated database schemas, AI-powered analytics, real-time inventory management.
Education
B.Sc in Computer Science and Engineering
Bangladesh University of Business and Technology (BUBT)