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Abdullah Al Mohaymen Rafi

@rafi

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Senior React/TypeScript engineer focused on scalable, high-performance frontend systems.

Bangladesh

Message

What I'm looking for

I’m looking for a product-focused team where I can lead scalable React/TypeScript architecture—shipping complex frontend features with strong performance, clean state management, and reliable integrations (auth, payments, real-time/AI) that drive measurable user satisfaction.

I’m a software engineer with 5+ years of experience building production-grade React and TypeScript applications, including 4 years of freelance delivery with a Top Rated badge on Upwork. I specialize in large-scale frontend architecture, migrations, and scalable UI development across B2B SaaS, healthtech, and AI-powered platforms, with a consistent focus on performance, scalability, and clean state management.

At Offsight, I reduced application load times by 65%, contributing to a 10x improvement in user satisfaction and supporting 43 global enterprise clients. Most recently at Airwork AI, I’ve architected and led frontend development from scratch—building dual user portals, a resilient authentication system, Stripe subscription billing flows, and an OpenAPI-first pipeline that auto-generates typed SDKs and hooks. Earlier, I built an AI recruitment platform with OpenAI API-driven parsing and search, shipped contractor time tracking with timezone-aware workflows, and led a major migration from Angular.js to React.js—improving development efficiency by 30% and loading performance by 65%.

Experience

Work history, roles, and key accomplishments

Current

Lead Frontend Engineer

Current

Airwork AI

Feb 2025 - Present (1 year 4 months)

Architected and led frontend development of a B2B SaaS platform from scratch, including dual user portals (organizations and talent) using Next.js, React, and TypeScript. Built resilient auth with Google OAuth and HTTP-only cookie sessions, integrated Stripe subscriptions, and implemented OpenAPI-first typed SDK generation and analytics.

Next.js React TypeScript OAuth Stripe Billing OpenAPI Zod PostHog

Software Engineer

Expatal

May 2024 - Jan 2025 (8 months)

Built an AI recruitment platform with a candidate portal (Next.js) and recruiter portal (React + Vite), integrating OpenAI for resume parsing, summarization, and smart search. Developed role-based authentication across email/password, Google, and LinkedIn OAuth, and implemented an ATS with multi-stage interview workflows and real-time status tracking.

Next.js React Vite OpenAI API OAuth Cloudflare R2 Real Time Tracking

Software Engineer

Usko Health

Oct 2023 - Mar 2024 (5 months)

Delivered 5 dynamic React + TypeScript campaign landing pages with shared components supporting A/B testing for treatment variants. Built and shipped a contractor time tracking system for 50+ contractors, including timezone-aware clock-in/clock-out workflows with cross-day safeguards and conversion-focused, performance-optimized UI.

React TypeScript A B Testing Performance Optimization Time Tracking Timezone Aware Timestamps Responsive UI State Management

Frontend Migration Engineer

Supertal

Mar 2023 - Jan 2024 (10 months)

Led the migration of Offsight from Angular.js to React.js, raw CSS to Tailwind CSS, and JavaScript to TypeScript, improving development efficiency by 30%. Reduced loading time by 65% using React hooks and fewer API calls, achieving a 10x boost in user satisfaction while serving 43 global companies and building features including analytics, workflow automation, and a drag-and-drop form builder with