David Kovacs
Full-Stack Developer | TypeScript · Node.js · React · Angular · Next.js
About Me
I’m David Kovacs — a Full-Stack Developer specialized in the TypeScript and JavaScript ecosystem (React, Node.js, Next.js, Angular). I build fast, scalable and maintainable applications that reduce manual work and boost efficiency. I’ve worked on modern web apps, automated workflows, and even Web3 projects, always focusing on delivering solutions that directly support business goals.
Experience
- Apr 2025 - Present
Full Stack Developer
Skyint Ltd.At Skyint Ltd, a company delivering software for the European Space Agency and commercial clients, I architected and developed a web platform that automated manual environmental lab workflows, cutting reporting and data processing time by 50%, saving staff hours weekly and enabling real-time pollution monitoring. - Jun 2024 - Sep 2024
Backend Developer (Freelance)
NexonAs a freelance backend developer, I built the scalable backend for Nexonity, a gamified location-based community app. I designed secure systems to support thousands of users, integrated in-app currency and rewards, and delivered features that boosted engagement, retention, and monetization for an influencer-driven platform. - May 2024 - Apr 2025
Full Stack Developer
eBusiness consultancyCollaborated on multiple projects with bogozi.com, a Transylvanian eBusiness consultancy, contributing to the development of a community-focused search platform, a WordPress-like CMS for eCommerce, and advanced webshop customizations. Delivered solutions that streamlined workflows, minimized manual tasks, and enabled non-technical users to build and manage their own online stores.
Projects
Environmental Lab Automation
Manual lab workflows caused delays and inefficiencies in processing environmental data. I built a full-stack web platform that automated data entry, report generation, and analytics, reducing processing time by 50% and enabling real-time pollution monitoring for faster, data-driven decision-making.
ChainPortal
Users managing NFTs and tokens across multiple blockchains faced high fees and the hassle of using different platforms. ChainPortal solves this by unifying asset management into one platform, enabling seamless minting and tracking across chains with real-time transparency. Built with Angular, NestJS, PostgreSQL, and Docker for scalability, and automated with CI/CD, it ensures efficient, secure, and cost-effective Web3 asset creation.
Nexonity
Nexon’s fans needed deeper engagement beyond social media. Nexonity gamifies interaction with location-based challenges and in-app rewards. I built the scalable backend using Node.js, NestJS, and PostgreSQL, enabling secure profiles, real-time rewards, and thousands of active users.
Székely AI
Székely AI is an AI chat platform that understands and responds in the Székely dialect, preserving local language and humor through technology. Built with Node.js, React and OpenAI, it bridges tradition and innovation with a playful, cultural twist.
Solana Mystery Box shop
The NFT and token ecosystem lacked a fun, gamified way for users to discover digital assets. The Solana Mystery Box Shop introduces a new type of web shop where users can purchase mystery boxes containing NFTs, tokens, or Solana rewards, with QR code payments for a secure and simple experience. This creates an engaging, collectible-driven platform that enriches the ecosystem and encourages user participation.
Hockey Lineup Analyzer
A React + TypeScript app built for a professional NHL analyst to evaluate lineups, rate players, and predict outcomes more accurately. The platform centralized player stats, visual analytics, and expert scoring — improving decision speed and betting profitability by over 10%.
Contact Me
Interested in working together or have a question? I’m available as an employee, freelancer, or contractor. Click the button below to send me an email directly.