Building developers who can ship real products.
Sagnik Bhattacharya is the founder of Coding Liquids and a top-rated Udemy instructor who has taught Flutter, Dart, and Excel with AI to over 30,000 students across 175 countries since 2018. Based in Kolkata, India, he creates project-based courses and delivers corporate training programmes that help students and development teams build production-ready skills.
Hands-on learning built for real product work.
Sagnik Bhattacharya founded Coding Liquids in 2018 to bridge the gap between academic theory and production-ready software development. The company delivers online courses, corporate training, and consulting services focused on Flutter, Dart, Excel, and AI integration.
His courses on Flutter, Dart, and Excel with AI have reached over 30,000 students across 175 countries on Udemy, where he holds a Top Rated instructor status. He also works directly with development teams through corporate training workshops and technical consulting engagements worldwide.
Sagnik's teaching approach combines active consulting with education — every course and workshop is grounded in real delivery experience. The focus is on understanding architecture, tooling, debugging, and deployment well enough to build production software with confidence.
He has also built AI-powered products including FarmAdvisor AI (agricultural advisory in 36 European languages) and Kisan Salahkaar (farming assistant in 50+ languages), both featuring voice chat, image diagnosis, and multilingual support.