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Middle Full Stack Software Engineer at Exadel. Location Information: Krakow PL, Warsaw PL. . . Why Join Exadel. . We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.. . From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.. . What powers it all? Our people are ambitious, collaborative, and constantly evolving.. . About the Client. . The Client is a custom software development company committed to providing quality IT solutions that facilitate and add value to clients’ businesses. They offer a full spectrum of custom software services, including web and mobile application development.. . What You’ll Do. . . . . Own the maintenance and enhancement of the Node.js API and ReactJS frontend. . Ensure long-term stability, scalability, and performance of the user interface. . Implement advanced improvements to the Hapi.js backend and MobX-based state management. . Optimize the GraphQL data access layer for efficient and reliable data flow. . Interface directly with customers to diagnose and resolve complex UI and API issues. . Bridge user experience and technical execution to deliver high-quality, resilient software updates. . . What You Bring. . . Advanced TypeScript: Deep proficiency in TypeScript across the entire stack. . Frontend Excellence: Strong experience with ReactJS and state management. . Please mention the word **APPROVAL** and tag RMTA0LjE1NC4yMDcuNTI= when applying to show you read the job post completely (#RMTA0LjE1NC4yMDcuNTI=). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human..