Open to full-time remote roles + selected client projects
MERN stack developer building React and Next.js web apps with Node.js, Express, MongoDB and Redis. I also integrate AI with OpenAI, Claude, Gemini, Ollama and Jev AI, plus n8n and Zapier automation for UK and US teams.
Selected work / systems and experiences
Start with AI code review, real-time SaaS and CMS development. Each case study explains my contribution and the workflow behind the live product.
Automatically reviews GitHub pull requests for bugs, security risks, and code quality issues. Flags actionable findings and adds fix suggestions as PR comments, helping senior developers and managers save review time before merging to production.
A live-chat platform with visitor tracking, conversation history, lead analytics, brand management, authentication, and role-based administration.
An image-led digital destination for a leading UK science and technology campus, connecting workspaces, nature, community, events, and property availability.
A premium digital showcase for a 900,000 sq ft vertical campus, presenting its hospitality-led amenities, 44 floors, Midtown location, and available workspace.
CHOOSE YOUR EDITION.
ENTER THE RED.
Enter the experience ↗
Personal concept project · Unofficial brand exploration
A cinematic edition selector with layered fruit worlds, controlled product-state transitions, pointer depth, and a continuous scroll story.
Personal project · Product launch concept
Editorial product storytelling shaped around one persistent bottle, cinematic states, formula education, and a focused purchase path.
A complete browser-based tools platform with searchable utilities, fast task flows, category navigation, and a privacy-first product position.
05 / EXPERIENCE
React Native services marketplace: lead submission, OTP, provider workflows, REST APIs, and Stripe payment screens.
React and Node/Express live-chat product with visitor dashboards, analytics, JWT, Socket.io, and Redis Pub/Sub.
React, MERN, PHP and WordPress projects for UK, USA and Pakistan clients through Fiverr and direct engagements. Previously achieved Level One seller status on Fiverr.
Earlier freelance work
Selected projects from my earlier freelance work. These summaries describe my contributions; live demos and screenshots are not currently available.
Built folder creation and drag-and-drop file uploads, including dropping files into a folder or outside it to upload. A workspace for organising a startup's files.
Built a web app for a US client where HR or administrators could create and send payslips. Employees could view payment records and request corrections, with employee suggestions by department and position.
Built a website with a custom administration panel to publish music and events, plus automatic updates when new songs or events were added.
Historical project / website no longer liveIntegrated the Chartmetric API into a React website, including refresh-token handling and filtering specific records from large API responses.
Designed and developed a notes web app with account authentication and personal cloud notes. Users could create, edit and delete their notes.
Built a custom landing page and coupon discount page. Visitors could copy coupon codes and follow links to the relevant offers.
Education BSc Computer Science, Mehran University of Engineering & Technology, 2019 - 2023.
Discuss a similar workflowPast Fiverr client feedback
Selected excerpts from past client reviews, with the original screenshots available below.
“However, when I reached out for help, he was able to fix it quickly and efficiently. I was impressed by his speedy service and his ability to solve the issue which had been causing me so much frustration.”
“I was desperate to fix a small bug and he managed to fix it within an hour, perfect work.”
“I needed a design implemented quickly and well. He's done it efficiently within the timeline I needed and had great communication along the way. If you need something done well, go with Hasnain.”
I am a Karachi-based full-stack developer working remotely worldwide across interface, backend, data, mobile, and delivery - so product decisions do not get lost between specialists.
Explore my skills ↘Technical expertise / web + mobile + AI
Frontend, backend, data, mobile and AI integrations connected as one practical engineering stack. Explore AI and automation services.
Responsive interfaces, dashboards, state, and reusable systems.
Fast applications, server rendering, routing, and production SEO.
Reliable services, integrations, background jobs, and business logic.
REST APIs, authentication, validation, permissions, and error paths.
Flexible data models, aggregation, indexing, and application storage.
Chat, presence, notifications, pub/sub, and live operational events.
Responsive utility-first styling and reusable interface patterns.
Responsive layouts and established component systems.
Editor-managed content delivered through modern frontend experiences.
Safer application contracts and maintainable frontend and backend code.
Cross-platform mobile products, native workflows, and API integration.
Structured schemas, queries, relations, and dependable product data.
Typed queries, CMS integrations, and efficient frontend data flows.
Containerized builds, CI/CD, Vercel, Netlify, and reliable releases.
AI API integrations, structured results and application tools.
Assistant workflows, document tasks and reviewable application actions.
Provider integrations selected for product requirements, hosting and data needs.
Webhooks, app connections, business workflows and failure handling.
Document retrieval, source references, access rules and human handoff.
Full-stack development services
I help companies hire focused engineering ownership and help clients launch, improve, or rescue digital products without hand-offs between separate frontend and backend teams.
Looking for a remote developer for a London or US team? I am available from Karachi for projects and roles abroad. Explore my frontend contributions to Cambridge Research Park in the UK and 1540 Broadway in New York, alongside my SaaS development work.
Need customer records, lead pipelines and follow-ups in one application? Explore custom CRM development for London, UK and US teams, with dashboards, roles and workflow integrations.
Planning or reviewing a website? My free website tools help you estimate a budget, write a project brief and check speed and search basics.
Full-stack React, Next.js, Node.js, Express and MongoDB development for business websites and web applications.
Hire a React and Next.js developer ↗Production-minded SaaS delivery covering dashboards, subscriptions, roles, analytics, integrations, admin workflows, and a foundation that can evolve.
SaaS MVP development services ↗Cross-platform mobile products with API integration, authentication, payments, notifications, marketplace flows, and practical release support.
Plan a mobile app ↗Chat, visitor presence, notifications and live workflows using Node.js, Socket.io and Redis, supported by clear API and data contracts.
Improve a live product ↗AI app development and integrations for web products using OpenAI, Claude, Gemini, Ollama and Jev AI as the project requires.
AI app development services ↗Enquiry capture, appointment requests, approved business answers and a clear route to your team.
Voice receptionists ↗WhatsApp automation ↗AI automation services that connect business apps and approved knowledge with human review and failure handling.
n8n automation ↗Zapier workflows ↗Business AI chatbots ↗03 / CAPABILITY SYSTEM
I connect the product surface to the systems beneath it - then carry the same thinking through release.
I build responsive React and Next.js interfaces with deliberate hierarchy, accessible interaction, and performance that holds up outside a design mockup.
Node and Express services, role-based access, REST or GraphQL contracts, validation, and error paths designed so another developer can extend them safely.
I connect WebSockets, Redis, event flows, and React Native surfaces for chat, presence, notifications, booking, and operational dashboards.
I carry builds through Git, Docker, testing, deployment, observability, and handoff - so the team receives a working product, not an unexplained repository.
04 / HOW I WORK
Complex work should feel understandable. Every phase has an output, a decision, and a clear next move.
Users, constraints, scope, critical flows, and what success actually needs to mean.
Interface direction, architecture, data model, integrations, and an honest delivery plan.
Working slices, frequent review, real device testing, and fewer surprises near release.
Performance, edge cases, deployment, documentation, and the next product decision.
06 / PROJECTS + FULL-TIME ROLES
Hiring in the UK or USA? I’m available for remote full-time roles and selected projects from Karachi. Share your role or project, team time zone and required working-hour overlap so we can discuss the fit.
