Notes on building software, products and companies.
I’m building Clipwise.ai. Previously Rheo TV, acquired by Unacademy, and Relevel, scaled to $10M ARR. These are my public notes, including the mistakes.
Writing
6 posts- What a token price means on your own GPU How to turn $/million-token API prices into GPU-hours: prefill vs decode, the roofline math, KV-cache sizing, batching, serverless cold starts, and what an API gives you that a rented GPU does not. Worked with real nu...
- Teaching a 9B model to direct motion graphics How we fine-tuned Qwen3.5-9B to write motion-graphics scenes, and six files that repeat it: data checks, a 230-line LoRA trainer, the merge, and serving with llama.cpp and vLLM.
- Why we render video from JSON, not HTML LLMs write good HTML and CSS, and our renderer runs on HTML, CSS and GSAP. Our models still write a JSON scene graph. Four reasons: repeatable frames, checks before render, edits that name one node, and one document f...
- Lines I keep coming back to Quotes and thoughts on audacity, trust, systems, and the difference between what people feel is wrong and what they think will fix it.
- Rules for running a startup team Hiring the best talent is only half of it. Keeping them aligned takes clear expectations and open communication. Here is what I've found actually works.
- Preparing to start up is easy. Starting up is not. Preparation for the startup is easy; you control how hard you work. Starting up is a very different beast. What actually got hard: hiring, culture, visibility, and the internal struggle of no longer building.
About
My name is Prakash Kumar. I’m currently building Clipwise.ai.
I’m a tech entrepreneur with a deep love for coding and building products from first principles. Previously, I co-founded Rheo TV and Relevel.
At Rheo TV, we built cutting-edge distributed live-streaming systems. We raised funding from top investors including Sequoia’s Surge and Lightspeed Ventures, and the company was eventually acquired by Unacademy.
Post-acquisition, I co-founded Relevel with Unacademy, where I built the product and tech organization from the ground up. Over time, we grew the team to 40+ people and scaled the business to $10M in ARR before my departure.
I write these blogs as my public notes: insights, learnings, and reflections, including the mistakes I’ve made along the way.
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