- Early-stage startup — IP-address management platform.

- Sole front-end engineer on the product — designed and implemented the entire front-end architecture from scratch on Next.js and TypeScript, owning everything from project setup to production delivery.

- Grew and supported the platform to ~100–200 daily active users, keeping the interface fast and reliable as the startup scaled.

- Built a consistent, accessible UI on top of the shadcn/ui component library, turning designs into reusable, production-ready components.

- Integrated the platform with a REST HTTP API covering authentication, company onboarding and IP-address inventory management.

- Set up end-to-end testing with Cypress, covering critical flows — user authentication, company creation and adding IP addresses to the platform.

- Optimized front-end performance — reduced bundle size, sped up file and asset loading, and eliminated unnecessary re-renders to keep the interface fast under growing usage.

- Instrumented the app with Sentry for error monitoring and web analytics to track real-time traffic and active users, giving the team clear visibility into stability and usage.

- Set up Docker and CI/CD pipelines to automate builds, testing and deployments, streamlining delivery to production.

- Debugged and fixed hydration mismatches introduced by third-party document-rendering libraries in the Next.js SSR setup, ensuring stable, error-free rendering.

- Partnered closely with the designer to craft an intuitive user experience and with the backend engineer to unblock and close urgent tasks faster — driving all front-end decisions in a tight cross-functional team (backend, designer, 2 QA).

- Started as a React Native developer and later transitioned to the Front-End team.

- Developed and maintained a reusable Crypto Wallet library for secure user authentication via MetaMask, WalletConnect, and other crypto wallets; the library was actively used across multiple company projects over several years.

- Integrated Web3 functionality, enabling seamless interaction with blockchain networks and smart contracts.

- Played a key role in the development and maintenance of NFT marketplaces, ensuring stability and scalability under high traffic conditions (up to 5,000 real-time users).

- Took full ownership of one of the NFT marketplace projects, from front-end architecture planning to production deployment.

- Designed and implemented a custom UI component library using Storybook, improving code reuse and UI consistency across the platform.

- Regularly implemented CI/CD pipelines to streamline development and deployment processes.

- Integrated analytics tools for user behavior tracking and implemented SEO and performance optimizations, resulting in faster page loads and better search visibility.

- Built a cross-platform mobile app with React Native (iOS/Android).

- Implemented navigation and state management using React Navigation and Redux.

- Optimized performance, handled testing, deployed to App Store and Google Play.

- Provided post-release support and updates.

- Led the development of an internal analytics tool designed to interact with Instagram’s data ecosystem.

- Performed API sniffing and traffic analysis to understand undocumented Instagram endpoints and data flows.

- Created a reusable JavaScript library for streamlined communication with the Instagram API, enabling structured access to profile data, media content, and engagement metrics.

- Developed the entire application stack, including a custom backend using Node.js and Express, and a responsive front-end using React.js.

- Implemented secure authentication flows and data handling procedures to ensure performance and data integrity.

- Supported internal stakeholders by enabling data visualization and insights for business analysis.