Vitalii A.

I’m Vitalii, a Senior Full Stack Developer with 8+ years of experience building web applications, mobile apps, SaaS platforms, MVPs, and API-based systems for startups and growing businesses.

𝐅𝐞𝐞𝐥 𝐟𝐫𝐞𝐞 𝐭𝐨 𝐜𝐥𝐢𝐜𝐤 “𝐌𝐞𝐬𝐬𝐚𝐠𝐞” - 𝐈’𝐥𝐥 𝐫𝐞𝐬𝐩𝐨𝐧𝐝 𝐪𝐮𝐢𝐜𝐤𝐥𝐲. 𝐎𝐫 𝐡𝐢𝐭 "𝐭𝐡𝐫𝐞𝐞 𝐝𝐨𝐭𝐬" 𝐚𝐧𝐝 𝐢𝐧𝐯𝐢𝐭𝐞 𝐦𝐞 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐣𝐨𝐛 𝐬𝐨 𝐈 𝐜𝐚𝐧 𝐩𝐫𝐨𝐯𝐢𝐝𝐞 𝐚𝐧 𝐞𝐬𝐭𝐢𝐦𝐚𝐭𝐞 𝐚𝐧𝐝 𝐚 𝐜𝐥𝐞𝐚𝐫 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐩𝐥𝐚𝐧.

I help teams launch MVPs, improve existing systems and scale SaaS products without losing performance or stability.

As a Full Stack developer I usually work on:
• building MVPs from idea to production for web and mobile applications
• building SaaS platforms, dashboards, admin panels, and API integrations
• improving and refactoring slow or unstable frontend and backend systems
• scaling backend and APIs under real production load
• optimizing performance and user experience across web apps
• taking ownership of features and systems end-to-end

✅ Track record on Upwork:
• $200K+ total earnings
• 7,900+ hours worked
• 99% Job Success
• Top Rated Plus

Worked across SaaS platforms, marketplaces, mobile apps and internal tools, supporting both new product development and long-term system improvements.

🚀Selected work as a Full Stack developer:
• Built a collective decision-making platform with identity verification and structured voting flows, helping users organize, align, and make decisions together in a transparent way.
• Developed an AI-driven language learning app with guided lessons, reinforcement logic, and gamified features, helping users stay engaged and build consistent learning habits.

My Full Stack developer working approach
I build systems that work reliably in production and don’t need to be rebuilt as the product grows.
🚀 Clients value:
• clear communication and predictable delivery
• ownership from idea to release
• ability to step into an existing codebase and move it forward
• focus on real product outcomes

🚀Tech stack:
• Frontend - React, Next.js, TypeScript, Tailwind CSS
• Backend - Node.js, REST APIs, integrations, authentication
• Mobile - React Native
• Data & Infra - PostgreSQL, MongoDB, Firebase, Supabase • Integrations - Stripe, PayPal, third-party APIs