Senior Full-Stack/Frontend Developer

Built and scaled a next-generation Web3 trading terminal from scratch. Designed and delivered core trading terminal functionality in a small cross-functional team. Architected and implemented end-to-end cloud crypto-wallet management powered by TEE-secured enclaves. Led wallet domain refactor improving UX clarity. Built secure export/import flows with OTP protection. Co-architected cross-tab real-time layer reducing WebSocket connections and latency. Reduced backend WebSocket load and eliminated race conditions. Designed and implemented SOL/SPL token deposit and withdrawal flows. Developed high-precision financial computation module. Integrated state architecture using zustand and TanStack Query. Implemented idle-detection logic for socket lifecycle. Delivered authentication flows and invitation system. Built mobile-adaptive web application layer. Delivered production features under high-risk regional conditions.

Designed lightweight real-time messaging protocol optimized for minimal binary size and low network overhead. Built lightweight Web3 messenger with Swift frontend and Go backend. Designed and implemented full-stack real-time messaging architecture integrated with TON blockchain primitives. Delivered production-ready iOS application (TestFlight → App Store release). Engineered backend services in Go for messaging, user sessions, and blockchain interactions. Built public landing page and technical blog documenting product and architecture. Achieved early organic traction with ~2000 impressions and ~10% download conversion.

Co-led frontend architecture for clinician-facing health product, owning real-time messaging and internal CRM modules end-to-end. Designed and implemented real-time synchronization between React Native mobile app and React web CRM using Firebase, reducing message delivery latency to <1s. Rewrote legacy web chat to modern React, improving render performance by ~20-30% and reducing bundle size by ~50%. Collaborated with backend engineers on REST API design and data-flow optimization; introduced TypeScript strict mode and autogenerated OpenAPI types, reducing frontend regressions by ~30-40%.

Maintained production-grade frontend for a live decentralized exchange, including swaps, liquidity pools, wallet integration. Delivered high-load, security-sensitive UI for on-chain interactions with real-money transactions. Optimized UX for blockchain constraints to improve user trust and usability. Worked closely with backend and blockchain developers on API contracts and on-chain UX flows.

Delivered multiple web and mobile applications for international clients across different domains. Built and maintained frontend interfaces using React and React Native, focusing on production stability and performance. Developed backend components and GraphQL endpoints, integrating frontend and backend systems. Improved application architecture and performance for production environments. Maintained and shipped iOS features using SwiftUI.

Developed new frontend and backend features for a high-traffic production platform. Improved performance and stability of core user flows used by a large daily audience. Worked with real-time data using WebSockets and RabbitMQ. Participated in production deployments and CI/CD pipelines.

Built web and mobile features for an IoT-based apartment rental platform used in production. Developed frontend applications using React and React Native. Integrated authentication, interactive maps, smart-home device control, and in-app messaging. Project closely related to bachelor thesis on IoT rental systems.

Built frontend interfaces for semantic search and machine learning prototypes. Collaborated with researchers on experimental and proof-of-concept systems.

Developed machine learning simulations and research prototypes in Python. Worked on Python system programming and mathematical engines for research use.