Abdullah H.

I'm a Full Stack Developer who ships the whole product, the web app, the mobile app, the backend and the integrations, so founders hire one partner instead of coordinating three contractors. 8+ years, 100% Job Success Score across 19 contracts on Upwork, Top Rated Plus. Two of those ran past 450 hours each: a $16.7K community platform and a $15.8K fintech build on Plaid and Stripe. One client is now on their fourth contract with me and my team. "Hani is the most capable, brilliant technical partner I have ever worked with. He is not only an expert, but also kind, an excellent communicator, and has generated business ideas..." Client review, $16,765 engagement, 559 hours. WHAT 100% JOB SUCCESS ACTUALLY MEANS Upwork calculates Job Success from how contracts ended, including the private feedback you never see, plus disputes, refunds and repeat hires. Mine is 100% across every contract I have taken. Top Rated Plus is Upwork's highest tier and it is removed the moment performance slips. Neither is bought. The thing you are actually worried about when hiring a stranger, that they go quiet or hand you something you have to argue about, has not happened yet. WHAT I BUILD AS A FULL STACK DEVELOPER SaaS platforms and multi-tenant products. As a SaaS Developer I handle end to end SaaS development, from database schema through role-based access and row-level isolation to Stripe billing and production monitoring. GoodNests is a white-label community SaaS where every organisation gets its own branded web and mobile app off a single codebase, with member analytics and a founder dashboard. JESY is an invite-only B2B marketplace connecting DJs, venues and brands across the global electronic music industry, with in-app negotiation, escrow-secured payments, KYC verification and 360 degree ratings. AI features that survive production. My AI work runs inside shipped products, not demos. ZOVOX, listed on my portfolio as Genesys Financial, is a mobile-first financial platform for self-employed users with Plaid bank sync, Stripe and in-app purchase subscriptions running side by side, and an AI assistant grounded in live transaction data so it never invents a balance. Designed against GLBA and SOC 2 requirements. As an AI integration developer I build with the Claude API and OpenAI, RAG pipelines, embeddings and vector search, streaming chat interfaces with real loading and error states, and per-user token spend caps from day one rather than after the first bill. Next.js and React frontends. I build Next.js dashboards, admin portals and operations consoles in TypeScript, with real-time data and Stripe billing portals. App Router, server components, and component libraries that survive a second developer joining. Node.js backend and APIs. As a Node.js Backend Developer working in Express and NestJS, I design authentication, business logic, background jobs and REST and GraphQL APIs on Postgres, MongoDB, Firestore and Supabase, with integrations across Stripe, Plaid, Twilio, SendGrid, OAuth and mapping providers. Flutter mobile. Cross-platform iOS and Android from one codebase, with push notifications, deep linking, in-app purchases and offline-first patterns. WXW Delivery is three connected apps, customer, driver and operations dashboard, so dispatch, tracking and support live in one stack. I handle App Store and Play Store submission including reviewer pushback, and I have cut load times by 47% on a production release. MY STACK Web: React, Next.js, TypeScript, Tailwind. Backend: Node.js, Express, NestJS, REST, GraphQL. Mobile: Flutter, Dart, Bloc, Riverpod. Databases: Postgres, MongoDB, Firestore, Supabase. Cloud: AWS, GCP, Firebase, Vercel, CI/CD. AI: Claude API, OpenAI, RAG, embeddings, vector search. Integrations: Stripe, Plaid, Twilio, OAuth, Maps. HOW I WORK I think like a product owner and code like a tech lead, so I push back on a spec that will not hold up before we build it rather than after. I flag scope risk early, not at the deadline. Daily updates, predictable timelines, no Friday night surprises. Architecture that scales from the start instead of being retrofitted at Series A. I run a small senior team, a QA lead and full-stack engineers, and I stay through bug bashes, store reviews and v1.1. You talk to me, not a project manager. Message me with your project. Within one business day you will get a real estimate, a suggested approach, and two or three examples from my portfolio that match what you are building, whether you need a Full Stack Developer for long-term product work, a SaaS Developer for a new platform, or a Next.js and Node team to take over an existing codebase. Keywords: Full Stack Developer, SaaS Developer, Next.js Developer, Node.js Backend Developer, React Developer, Flutter Developer, Mobile App Developer, AI Integration, Claude API, OpenAI, RAG, Multi-Tenant SaaS, Stripe, Plaid, Escrow, KYC, Fintech, Marketplace, TypeScript, Supabase, Postgres, AWS, MVP, Startup CTO