Senior Frontend-Entwickler

Responsibilities * Architected and developed a cross-platform React Native application supporting four user roles—drivers, carriers, warehouse staff, and administrators—within a single codebase. * Led development of the Next.js web platform and implemented JWT-based authentication flows across web and mobile. * Built real-time background location tracking for route monitoring and ETA calculation. * Developed map-based workflows using Mapbox and Google Maps, including logistics and driver-focused functionality. * Integrated barcode and QR scanning to support warehouse operations. * Designed scalable frontend architecture using Feature-Sliced Design (FSD) across web and mobile platforms. * Mentored two developers through code reviews, technical guidance, and architecture decisions. Achievements * Delivered a unified mobile architecture supporting four distinct operational roles while minimizing duplicated code. * Introduced FSD across React Native and Next.js codebases, improving scalability, maintainability, and separation of concerns. * Enabled real-time fleet visibility through background location tracking, route monitoring, and ETA functionality. * Improved warehouse workflows through mobile barcode and QR scanning. * Introduced AI-assisted development workflows using Claude Code, Cursor, and Kimi Code to accelerate implementation, refactoring, and development processes. * Took technical ownership across both web and mobile products while mentoring and supporting the development team.

Responsibilities * Built a cross-platform React Native fintech application from scratch, maintaining full feature parity across iOS and Android. * Integrated GraphQL APIs using Zeus code generation for type-safe and efficient data communication. * Implemented secure authentication flows with Auth0 and Stytch, including JWT handling, silent token refresh, and secure storage. * Integrated RevenueCat for mobile subions and in-app purchases, and Stripe for web payments. * Managed mobile release workflows and CI/CD using App Center and CodePush. * Collaborated with product, design, and backend teams to deliver investment and portfolio-management features. Achievements * Delivered the production-ready React Native application from the ground up for both iOS and Android. * Reduced unnecessary API data transfer and improved performance through GraphQL and generated type-safe integrations. * Built a reliable authentication architecture supporting secure, seamless user sessions. * Implemented subion infrastructure across mobile and web platforms. * Established staged deployments and over-the-air updates, enabling faster releases and rapid production hotfixes.

Responsibilities * Developed SSR applications with Next.js and SPAs with React, covering both greenfield development and legacy refactoring. * Built cross-platform React Native applications using Expo (bare workflow) for iOS and Android. * Designed and maintained reusable frontend architecture and shared UI components. * Collaborated with designers, backend engineers, and product teams to deliver scalable features. Achievements * Built a reusable UI component library with Bit, reducing code duplication and improving consistency across multiple projects. * Modernized legacy React codebases, improving maintainability and development efficiency. * Delivered consistent cross-platform mobile experiences across iOS and Android. * Improved development speed by standardizing reusable components and frontend patterns.

Responsibilities * Developed responsive landing pages and React SPAs for performance-driven marketing campaigns. * Maintained and updated CMS-based websites using WordPress, Bitrix, and Joomla. * Implemented and configured Google Tag Manager for analytics and conversion tracking. * Optimized web pages for performance, responsiveness, and cross-browser compatibility. * Collaborated with marketing and design teams to implement campaign requirements. Achievements * Delivered high-performance landing pages optimized for marketing and conversion goals. * Improved website performance and user experience through frontend optimization. * Supported multiple marketing campaigns by rapidly developing and deploying new pages. * Streamlined analytics implementation through accurate Google Tag Manager configuration.