Hi, this is Sergii
I'm a |
Tech Enthusiast specializing in building exceptional digital experiences
I design and develop intuitive web applications that enhance user experiences, and I genuinely love what I do. With over 8 years of experience in full-stack development, I'm passionate about transforming ideas into reality through elegant interfaces and efficient, robust code.
About Me
- Fullname: Sergii Petrychenko
- Location: Slovakia
- Email: laos20823@gmail.com
- Languages: English, slovak
I am Sergii Petrychenko, Senior Full Stack Developer with experience building and maintaining web applications from front end to back end, where I focus on developing applications using Next.js and NestJS. My work enhances user access to critical trading data, and I design robust database schemas with PostgreSQL while implementing scalable solutions on AWS for high performance and reliability.
With a degree in Conputer Engineering from The Slovak University of Technology, I bring strong analytical skills to my projects. As an AWS Certified Solutions Architect, I am committed to driving innovation and improving user experiences in collaborative environments.
In my free time, I enjoy exploring new technologies and working on side projects that fuel my creativity. I'm particularly focused on honing my coding skills in data structures and algorithms, which keeps me engaged and helps me discover innovative solutions for my professional work.
Junior Software Developer
Forex Forest Limited
- Developed and scaled high-traffic web applications serving millions of active users using React, Next.js, Vue.js, and Node.js.
- Designed and optimized high-performance RESTful APIs with Node.js and Express, ensuring low latency, high security, and reliable concurrency.
- Implemented Redis-based caching and real-time data systems to significantly improve application responsiveness and reduce backend load.
- Adopted microservices architecture and cloud-native deployments (AWS/GCP) with automated CI/CD pipelines to enhance scalability and system reliability.
- Leveraged Next.js Server-Side Rendering (SSR) and global CDN integration to boost SEO, accelerate content delivery, and improve initial page performance.
- Delivered measurable performance gains, reducing average page load times by 35%, API latency by 40%, and driving higher user engagement across the platform.
Skills
Always Learning
I’m constantly expanding my skill set and staying up-to-date with the latest technologies and best practices in software development.
Projects
🎙️ Modern voice assistant built with React and Retell AI. Features real-time voice conversations, beautiful UI with Tailwind CSS, and smooth animations with Framer Motion. Perfect for building conversational AI interfaces with clean, production-ready code.
cryptocurrencies is a platform that offer access to a variety of different cryptocurrencies.Our mission is to offer our users easy and secure transactions and make the exchange process effortless for everyone who wants to invest in cryptocurrencies.
A tall stack car rental management system built with React, Laravel, and MySQL. Features user authentication, car management, rental processing, and admin dashboard. Implements multi-layer architecture with frontend, backend, database, and service layers for scalable and maintainable codebase.
A high-performance, resilient automation bot engineered to seamlessly bridge Whop Chats with Discord Webhooks in real time, ensuring instant message delivery, fault tolerance, low latency, secure handling of events, and reliable synchronization across both platforms at scale.
A full-featured casino site platform designed for scalability and performance, featuring seamless integration with a professional slot game API, real-time gameplay, secure transactions, user management, analytics, and a modern interface optimized for web and mobile users.
ggsol.io is a Web3-based blockchain gaming platform and decentralized gambling/play-to-earn project built on the Solana blockchain. It revolves around using crypto wallets and tokens rather than traditional accounts and deposits
Gambit Markets is an online platform for sports betting and prediction markets that uses AI tools and autonomous agents to help users make predictions and place bets on sports and other outcomes. It combines traditional sportsbook features with prediction markets and automated betting strategies.
Want to see more of my work? Check out my GitHub profile for additional projects and contributions.
View More on GitHubContact Me
Contact Information
Feel free to reach out through the contact form or directly via email or phone. I’m always open to discussing new projects, creative ideas, or opportunities to be part of your vision.