assadullahch.
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Web & Mobile Development
built to perform under real load.

A perfect Lighthouse score in staging means nothing if the app ships with hydration mismatches, layout shift on first paint, or a React Native bridge that deadlocks under rapid navigation.

I build Next.js web platforms and React Native iOS apps with server component boundaries that actually make sense, Core Web Vitals that hold up in production, and an architecture your team can extend without rewriting.

Assad Ullah builds production web and mobile applications using Next.js, React, and React Native. Server components, edge rendering, iOS deployment, and full-stack architecture designed for real user load — not just a clean Vercel preview.

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Replies within 24 hours. No retainer required.

Capabilities

Interface
Excellence.

I don't just ship pixels. I decide which components run on the server, which stay on the client, and where the rendering boundary costs you a round trip you can't afford. Performance is an architectural decision, not a Lighthouse run at the end.

100Lighthouse score, production builds
0Hydration errors shipped to users
01

Next.js Web Applications

Full-stack Next.js applications with the right rendering mode for each surface: SSR for dynamic content that needs fresh data, SSG for marketing pages and documentation, ISR for content that changes on a schedule. App Router and Pages Router both supported. The choice depends on your project, not my preference.

Next.jsSSRSSGISRApp Router
02

React Native Mobile Apps

Cross-platform iOS and Android applications on a single React Native codebase. Native module integration where the platform requires it, push notifications, offline support, and app store submission. Expo for faster iteration where it fits, bare React Native when you need deeper platform access.

React NativeiOSAndroidExpoNative Modules
03

Component Architecture and Design Systems

Scalable component libraries built with TypeScript and Tailwind. Design tokens that make UI changes fast and safe. Shared primitives across web and mobile where the rendering targets allow it. A consistent design system is the difference between a frontend that is easy to extend and one that is a negotiation every time.

TypeScriptTailwind CSSDesign TokensComponent Library
04

State Management and Data Fetching

Server state managed with React Query or SWR, aligned to rendering strategy. Client state with Zustand or React Context where appropriate. Data fetching patterns that do not over-fetch, do not go stale silently, and do not put the API under unnecessary load.

React QueryZustandSWRAPI Integration
05

Performance Optimization

Core Web Vitals optimization targeting 90+ Lighthouse scores. Bundle analysis, code splitting, image optimization with Next.js Image, font loading strategy, and critical path CSS. Performance is designed into the build. Not fixed in a final audit when the client is waiting to launch.

Core Web VitalsLighthouseBundle AnalysisImage Optimization
06

CI/CD and Deployment

Automated deployment pipelines with preview environments per branch, test gating before production merges, and rollback capability. Web deployed to Vercel or AWS with proper CDN and cache headers. Mobile pipelines configured for TestFlight and Google Play internal testing tracks.

VercelAWSGitHub ActionsTestFlightPreview Deployments

Technical Ecosystem

Built with modern
scalable technologies

I use proven technologies like React, Next.js, Node.js, and AWS to build scalable SaaS platforms, high-performance APIs, and production-ready systems.

Core Stack

ReactNext.jsNode.jsLaravelAWSStripe

Web01

Next.jsReactTypeScriptTailwind CSSFramer Motion

Mobile02

React NativeExpoiOSAndroidPush Notifications

State and Data03

React QueryZustandSWRREST APIsGraphQL

Performance and Deployment04

VercelLighthouseBundle AnalysisCDNGitHub Actions

Delivery

How I Build It.
Architecture first.

Phase 01

Technical Discovery and Rendering Strategy

SSR, SSG, ISR, or hybrid. The right rendering strategy depends on your data freshness requirements, SEO needs, and infrastructure. This gets decided with clear reasoning, not defaulted to whatever is newest. Mobile scope: React Native, Expo, or PWA, is confirmed with platform constraints documented before the build starts.

Phase 02

Component Architecture and Design System

Component hierarchy, shared UI primitives, and responsive layout system are designed before feature screens. This prevents structural rework mid-build and keeps web and mobile visually and functionally consistent. TypeScript and design tokens enforce the system across the codebase.

Phase 03

Feature Build and API Integration

Features are built against a defined API contract with performance budgets enforced from the start. Lazy loading, image optimization, and bundle analysis are part of the build loop. Not afterthoughts. Not a final audit before launch.

Phase 04

Performance Audit, Testing, and Deployment

Core Web Vitals measured and optimized to target scores before deployment. Mobile app tested across device matrix. Web deployed with CDN, caching headers, and a CI/CD pipeline that supports preview environments and automated rollback. App store submission handled if in scope.

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Web & Mobile Case Studies

01

Corely

creator monetization platform

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Most creator monetization tools are either too simplistic (basic payment links with no subscription logic) or too complex (full marketplaces with infrastructure the creator doesn't need). Corely sits in the right place: one creator, one profile, direct audience payments, automatic payouts. The engineering challenge was building a Stripe Connect integration that handles the full financial lifecycle — onboarding, KYC handoff, subscription management, payout routing, and the 2% platform commission — without exposing the creator to any of that complexity on the frontend.

Stripe Connect onboarding with KYC handoffAutomated creator payout routing2% platform commission engine at payment captureSubscription and one-time payment billingWebhook-driven payment lifecycle handlingCreator earnings and transaction dashboard
02

Kodezi

AI-powered web IDE SaaS

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Kodezi is not a thin wrapper around an LLM API. It's a full in-browser IDE — Monaco Editor with multi-tab state, diff views, codebase-aware context — with OpenAI integration that understands your actual project, not just the snippet you paste in. I built it from v1 through v4: the initial MVP, KodeziChat with real-time Socket.io streaming, a credits-gated subscription system enforced at the API level, a VS Code extension with native-feeling Webview UI, and separately, an automated system status tracker that replaced manual monitoring entirely. The 200K user milestone and Product Hunt Launch of the Month were outcomes of getting the product architecture right across four iterative versions.

200K active users reachedProduct Hunt Launch of the Month — February 2023Monaco Editor web IDE with multi-tab and diff viewOpenAI API integration with full codebase contextKodeziChat: Socket.io real-time AI streamingStripe subscriptions with credits-gated feature accessVS Code extension UI via Webview APIAutomated 90-day system status tracker
03

Proetutor

LMS platform development

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Legacy Laravel and Bootstrap 3 systems age poorly. Slow Time to First Byte, failing Core Web Vitals, no protection on video URLs — Proetutor v1 had all of them. The rebuild wasn't just a UI refresh. It was a full architecture change: Next.js 15 with server-side rendering for SEO-indexed course pages, a clean Lumen v11 API layer, Bunny Stream replacing unprotected video hosting, and a monetization system that handles subscriptions and lifetime access from the same checkout. The result was a 97 performance score and a platform that ranks on the pages a legacy system never could.

97 Lighthouse performance score92 Lighthouse SEO scoreLegacy Laravel + Bootstrap 3 → Next.js 15 rebuildBunny Stream HLS video delivery with signed URLsSubscription and lifetime access billingSSR for SEO-indexed course pages
04

WATT Community Platform

private community platform development

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Private community platforms fail in one of two ways: they either use off-the-shelf tools that don't integrate cleanly and feel cobbled together, or they get built as a real-time system that's underengineered and breaks under concurrent load. WATT Community needed to be a first-class product — not a Facebook Group with a custom header. Rich media posts with real-time updates across web and iOS simultaneously, group chat with full member management, a structured training system with protected Wistia video, and RBAC that means non-paying members genuinely can't access anything. All of it on a single Socket.io event layer shared between the Next.js web app and the React Native iOS app.

Real-time social feed — text, images, video — across web and iOS1:1 chat and member-managed group chats via Socket.ioReact Native iOS app with feature parity to webAdmin-managed training playlists with Wistia video and downloadable resourcesRole-based access control gating all platform featuresFCM push notifications for feed activity, messages, and mentions
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Web & Mobile Development

I hired this seller again for a mobile app. One of our in-house developers was tricking us but Assad was so transparent. The communication, the quality of work everything was excellent and he was so quick. We will hire Assad for all our future projects.

Iftikhar A.

Product Owner

Who This Is For

Right fit for
serious builders.

Founders Who Need a Production-Ready Frontend

You have a backend, a design, or a clear product spec, and you need a senior engineer to build the web or mobile frontend to a production standard. Not a template with components rearranged. A frontend built with the right rendering strategy, data fetching patterns, and performance budget from the start.

  • Backend exists or is in progress, frontend needs a proper build
  • Need SSR, SEO, and performance from day one, not added later
  • Launching to real users who will notice slow load times

Products with Performance or SEO Problems

Poor Lighthouse scores, slow Time to First Byte, client-side rendering killing search visibility. These are architectural problems, not styling problems. I diagnose the root cause and fix it at the level where it actually lives: rendering strategy, bundle size, caching headers, critical path CSS.

  • Failing Core Web Vitals or poor Lighthouse scores
  • SEO limited by a client-side rendering architecture
  • User drop-off attributable to load time or perceived performance

Teams That Need Web and Mobile From One Codebase

A Next.js web app paired with a React Native mobile app sharing core business logic and component patterns gives you web, iOS, and Android without maintaining three separate codebases. The tradeoffs are real. React Native is not the right answer for every mobile product. But when it fits, it cuts engineering cost significantly.

  • Need web plus iOS or Android, budget does not support three separate builds
  • Feature parity across platforms is a product requirement
  • Willing to use React Native for the mobile experience

Related Services

SaaS Development

Multi-Tenant Platforms Built for Real Scale

Most SaaS platforms fail at the architecture level before they fail at the product level. I build multi-tenant backends with proper tenant isolation, Stripe subscription billing that does not leak revenue, and RBAC systems that do not turn into a maintenance nightmare six months in. End-to-end, from schema design to production deployment.

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Fintech & Payment Systems

Stripe Infrastructure That Handles Real Money

Payment bugs are not like other bugs. A race condition in your webhook handler or a missing idempotency key does not just throw an error. It moves real money in the wrong direction, or does not move it at all. I build Stripe Connect onboarding, marketplace payout systems, and subscription billing infrastructure where the failure modes are handled explicitly, not optimistically.

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AI Integration & Automation

LLM Features That Ship to Production

The difference between an AI demo and an AI feature in production is context management, cost controls, failure handling, and the ability to evaluate whether the output is actually correct. I integrate LLM APIs into existing products: RAG pipelines, streaming chat interfaces, intelligent automation workflows. Built to handle real users, not controlled test conditions.

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FAQ

Common Questions.
Straight answers.

The questions product leads and CTOs ask before committing to a web or mobile build. Answered here so we skip the basics and get straight to your architecture on the first call.

Yes, using React Native. One codebase, consistent behavior on iOS and Android. I am direct about where React Native has real limitations, like complex native animations or deep hardware integrations. If your use case genuinely requires native Swift or Kotlin, I will tell you before you budget for the wrong approach.

Yes. Responsive is a baseline expectation, not a selling point. Every application I ship is built mobile-first, tested at real breakpoints, and does not rely on a framework doing the layout thinking for me. Performance on a mid-range Android device over a congested 4G connection is a test I actually run.

Yes. I implement designs with precision and flag problems in the Figma file before development starts, not after. Overflow issues, missing interaction states, fonts that degrade at small sizes, layout logic that breaks under dynamic content. That conversation is cheaper before the first sprint than during the third.

I make deliberate decisions about what renders on the server, what renders on the client, and what gets cached at which layer. Bundle size, Core Web Vitals, and Time to First Byte are not afterthoughts. A slow frontend is a conversion problem and a retention problem. I treat it that way from the start, not after the Lighthouse report comes back red.

Yes. I manage the full submission process for both the Apple App Store and Google Play, including build configuration, provisioning profiles, app signing, metadata, and responding to review rejections. App store submissions have failure modes most developers only discover mid-launch. I have been through them and know how to avoid most of them.

It starts with a technical brief, not a quote. I need to understand your user flows, your data requirements, and your integration points before I can give you a number worth trusting. From there: architecture review, component design, iterative builds with working demos at each milestone, and a deployment process that does not involve pushing directly to main and hoping for the best.

ExplorePortfolio About My Process Contact

Start a Web or Mobile Project

Ready to build
your web or mobile application?

Tell me what the app needs to do, how many users will hit it at peak, and whether you have an existing codebase or are starting fresh. I will confirm the right rendering strategy, define the component architecture, and scope what it takes to ship a production-ready application on time.

What to Expect

  • Response within 24 hours
  • Free architecture scoping call
  • Clear proposal with timeline & cost
  • No obligation to proceed
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Typically responds within 24 hours