Summary
Sergiu Rosu is a Mobile Architect and full-stack technologist with 15+ years of experience building products from firmware to polished mobile apps, and a career trajectory that began as an Internet Cafe Administrator and progressed to CTO roles. He specializes in iOS and cross-platform mobile architecture for IoT, leading teams to deliver scalable, high-performance apps with real-time device integration using BLE, MQTT and serverless backends. Comfortable across the entire stack, he has written ATmega firmware, designed custom hardware, shipped native Swift apps, and implemented Node.js/Firebase backends while championing Clean Architecture and TDD. He also drives CI/CD, testing strategies, and design work in Figma, blending hands-on engineering with technical leadership and mentorship. Based in Cluj-Napoca, Romania, Sergiu combines entrepreneurial instincts from running his own studios with a persistent curiosity for new technologies and practical AI prompt crafting.
14 years of coding experience
16 years of employment as a software developer
Inginer, Automatics, Inginer, Automatics at Universitatea „Petru Maior” din Târgu-Mureș
Mathemathics and Physics, Mathematics, Mathemathics and Physics, Mathematics at Liceul Mircea Eliade Sighisoara
Romanian, English