Hasnain Aftab

Full-Stack Engineer | MERN · Next.js · LangChain | Building AI-Integrated Web Applications

Talent

LahoreMember since August 1, 2026

Web DeveloperFull Stack DeveloperReact.jsNext.jsTypescriptJavascriptNode.jsExpressRest ApiApi DevelopmentApi IntegrationApi TestingWebsite DevelopmentPostgresqlMongodbRag ApplicationsDockerAwsAws Cloud ServicesGithubTailwind CssReduxSecure AuthenticationPayment Integration SpecialistCi/cdWebhooks

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Web DeveloperFull Stack DeveloperReact.jsNext.jsTypescript

About

Full Stack Developer with 3+ years of experience building production-grade web applications and AI-integrated software systems. Skilled in architecting scalable SaaS platforms using React, Next.js, Node.js, Express, and PostgreSQL, with hands-on experience integrating Claude API, LangChain, RAG pipelines, and vector databases into real products. I focus on building secure, well-structured applications that combine strong user experience with practical, production-ready AI functionality.

Experience

Full Stack Web Developer at BitzSol (2025-08 – Present)

Engineered 10+ production-grade web applications using React, Next.js, Node.js, and MongoDB, all successfully deployed to live environments.
Integrated AI-powered features into client applications, connecting LLM backends to responsive frontends via REST APIs.
Reduced API response time by ∼3 seconds through query optimization and efficient REST API design, improving overall application performance.
Built reusable React component libraries per project, reducing redundant code and ensuring UI consistency at scale.

Full Stack Developer at Freelance (2023-07 – Present)

Delivered 10+ full-stack web solutions for international clients across 3 countries.
Built and launched 5–7 page responsive websites per engagement, integrating authentication, REST APIs, and third-party services end to end.
Maintained 100% client satisfaction rate across all engagements, resulting in repeat business and referrals.

Frontend Developer at CafeVista (2022-01 – 2023-07)

Designed and delivered responsive, mobile-first UIs across multiple client projects using React and Tailwind CSS, maintaining consistent design standards throughout.
Collaborated closely with backend developers to integrate REST APIs, troubleshoot bugs, and iteratively improve frontend performance and user experience.
Took ownership of frontend architecture decisions on key projects, building reusable component libraries that reduced development time across the team.