Freelance React, Next.js & TypeScript Programmer: Building Offline-First PWAs & Real-Time SaaS

Today's web applications are expected to feel as instantaneous and resilient as native desktop and mobile software. Hiring a Freelance React & Next.js Programmer who understands Server-Side Rendering (SSR), strict TypeScript state management, WebSockets, WebRTC, and local-first storage is critical for user retention and search engine visibility.

I am Aldian Fazrihady, a Senior Freelance Programmer and Full Stack Engineer specializing in React, Next.js, TypeScript, and Progressive Web Apps (PWAs). Explore my live applications at aldianapps.com or hire me on Upwork.

Frontend & Full Stack Capabilities

  • Next.js App Router & Technical SEO: Hybrid SSR/ISR rendering, dynamic OpenGraph and JSON-LD structured data, GraphQL query batching, and Core Web Vitals (LCP/INP) optimization.
  • Offline-First CRDT & PWA Engineering: Local-first data persistence using IndexedDB, Yjs CRDT conflict-free synchronization, and custom Service Workers that keep apps functional on planes, trains, and unstable mobile networks.
  • Real-Time Telehealth & WebRTC: Hardware pre-call diagnostics using Web Audio API / MediaStream, Azure Communication Services (ACS) video orchestration, and bidirectional WebSocket messaging.
  • Browser-Native AI & Media (WASM / WebCodecs): Running quantized ONNX neural networks, Whisper audio transcription, and multi-track video editing directly inside the user's browser with zero server GPU cost.
  • Chrome Extensions (Manifest V3): Collision-free sandboxed iframe overlays, secure IPC message passing between content scripts and service workers, and automated DOM metadata extraction.

Related Frontend & Full Stack Articles

About the Author — Hire Freelance Programmer Aldian Fazrihady

Aldian Fazrihady is a Top-Rated Senior Freelance Programmer, Freelance Full Stack Developer, and AI Application Engineer with 15+ years of production software engineering experience and Google Cloud Professional Cloud Architect & Data Engineer certifications. He specializes in building custom LLM & autonomous AI agents, RAG pipelines, Next.js/React PWAs, Python (Django/FastAPI), Go microservices, and serverless cloud infrastructure on Google Cloud Run and AWS.

Hire Aldian Fazrihady on Upwork | Book 1-Day Programming Service ($100 USD via Polar) | View Live AI Portfolio | Portfolio Directory | Send a Direct Message

Related Engineering Articles

Freelance Programmer Specializations & Category Hubs