Nandu Rajagopala

Hi 👋🏽, I'm Nandu — a founder and product builder based in Berlin. I take consumer products from zero to launch: finding the right users, testing assumptions, and shipping. I've also taught entrepreneurship and innovation at university level.

I write about product discovery, user research, and building with AI.

What I'm building

Sprachelo — AI-powered German language learning

Sprachelo

AI speaking coach for German exam prep. Identifies your weak spots and gives you targeted feedback against official exam criteria.

Writing

MAY 2025

From Apps to Agents: How AI is Becoming Personal

How I built an AI agent for German learning and what it signals about the future of personalised software

MAY 2024

Cases, whiteboards, and lectures: reflections and lessons learned in university teaching

Challenges, learnings, and evolving dynamics in higher education from the perspective of a new lecturer.

APR 2024

Launching a startup — some key lessons learned

Notes, tips and insights from building ScienceQuests, a gamified web app to help kids learn science.

Get In Touch!

Send me an email or message me on Linkedin if you’re into that sort of thing.

© Nandu Rajagopala 2026