Full stack Developer serhii kushnir
<React TS Next.js Node.js Tailwind CSS-in-JS>
A full-stack developer focused on creating scalable, efficient solutions. With an engineering background and a structured problem-solving approach, I contribute effectively to both team and individual projects.
Open CVSelected Projects
Calmisu: Anxiety & Wellness App with a Calligraphy Twist
RoleMobile Developer & Web Developer
Tech StackReact Native (Expo), TypeScript, Neon, RevenueCat, Firebase Analytics, Astro
CloudBitPay: Cryptocurrency Payment Gateway
RoleFull Stack Engineer
Tech StackNext.js, React, TypeScript, Tailwind CSS, SWR, Axios, CMS Strapi, PostgreSQL, Cloudinary, React Hook Form, Zod, Recharts, Radix UI
Workplace English: AI Communication Coach
RoleFull Stack Engineer
Tech StackReact, Vite, TS, Lovable, Claude Code, openAI API, Supabase
Services
Websites & Web Apps
Fast, responsive websites and web apps — from a landing page to a full dashboard or client portal.
Mobile Apps
iOS and Android apps from one codebase — from first prototype to release on App Store and Google Play.
Backend & Integrations
Reliable server side, databases and connections to the services you already use — payments, CRM, calendars, APIs.
AI Assistants & Chatbots
Smart chat assistants that answer customers, qualify leads and book meetings — trained on your own content.
AI Automation
Automating repetitive work — lead handling, support, content and data processing — to save time and cut costs.
SEO & Visibility
Technical SEO, structured data, speed fixes and Google Maps listing so your business ranks higher and brings more visitors.
Speed & Code Improvement
Making an existing product faster, more secure and easier to maintain — without rewriting from scratch.
Let’s connect
My Local Time
CET
WARSAW
Thanks for stopping by! Open to freelance projects and contract work. Write me on email, Telegram or LinkedIn — or book a free call with my AI assistant.
- serhiy.kushnir.dev@gmail.com
Email
- @SerhiyKushnir
Telegram
- /in/serhiikushnir/
LinkedIn