Anton O.
Senior Full Stack Developer | React, Node.js & AI Integrations
I’m a Senior Full-Stack Developer with 10+ years of experience building web and mobile products in the JavaScript and TypeScript ecosystem. My core technologies are React, Next.js, React Native, and Node.js, and I work confidently across both frontend and backend development. I turn product ideas and business requirements into working software end to end. I can take an application from Figma designs to a deployed production system, covering the complete development cycle: UI implementation, frontend logic, backend services, APIs, databases, testing, infrastructure, and CI/CD. Alongside hands-on development, I can take responsibility for architecture, technical decisions, task planning, code reviews, and delivery. I focus on practical solutions, maintainable code, and getting working features into production. I also implement AI-powered features and integrations with modern AI APIs and use AI-assisted development workflows to deliver faster without compromising production quality. 💻 Frontend: JavaScript, TypeScript, React, Next.js, React Native, Redux Toolkit, Zustand, TanStack Query, Tailwind CSS, Material UI, shadcn/ui, Storybook, Cypress, Vitest, Jest ⚙️ Backend: Node.js, Express, Fastify, NestJS, REST APIs, GraphQL, WebSockets, PostgreSQL, MySQL, MongoDB, Redis, Supabase, Prisma, Drizzle ORM, AWS, Azure, Docker, CI/CD, Sentry, Datadog, Grafana 🔌 Integrations: OpenAI API and AI integrations, Twilio, WebRTC, SMS, WhatsApp, Pusher, Ably, Mapbox, Google Maps, third-party APIs
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $36k
Billed in all: $336,009$336k
$36k in the last 6 months
Across 5 contracts
Earnings, last 30 days
Skill rankings: Top 0.85% in ExpressJS
Ranked by MRR among everyone on Upwork with the skill.
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- #53Redux3,245 freelancers · 🇧🇬 #1Top 2%🇧🇬#1 of 8
- #77Tailwind CSS6,978 freelancers · 🇧🇬 #1Top 1%🇧🇬#1 of 28
- #114Supabase4,116 freelancers · 🇧🇬 #1Top 3%🇧🇬#1 of 14
- #123SaaS6,440 freelancers · 🇧🇬 #1Top 2%🇧🇬#1 of 15
- #127Front-End Development8,892 freelancers · 🇧🇬 #2Top 1%🇧🇬#2 of 22
- #164MongoDB10,865 freelancers · 🇧🇬 #1Top 2%🇧🇬#1 of 27