01 · Call Fusion, 2023 to 2025
Voice agents that called the leads brokerages had already paid for.
They talked to people properly and booked the appointment. Nobody had to pick up a phone. I built the first version in my first year of university.
- real calls handled
- 150,000+real calls handled
- B2B clients
- 20+B2B clients
- end to end on a live call
- <2 send to end on a live call
02 · Sold, 2025
We sold it while I was still in school.
I stayed on as Lead Engineer for Voice AI and took the platform from something that only worked in a demo to something 8,000+ brokers use across one of Canada’s leading mortgage networks.
03 · Shopify, Applied ML, May 2026 to now
The shopping agent people talk to inside the app.
I ship features and latency fixes for it, and I spend a lot of my time proving whether a change actually helped instead of assuming it did.
It asks a follow-up before it guesses.
- answer rate on clarifying questions I shipped
- 72%answer rate on clarifying questions I shipped
- fewer redundant calls to a slower reasoning model
- 79%fewer redundant calls to a slower reasoning model
- median wait cut per affected conversation
- 10.7 smedian wait cut per affected conversation
04 · Hermes, my own agent
An agent I built for myself.
It runs on a VPS and I talk to it from Telegram. It keeps my health log, reads my inbox, and twice a day it polls the careers APIs of about sixty companies and ranks what it finds.
- custom skills
- 17custom skills
- on a Hetzner VPS
- 24/7on a Hetzner VPS
- a month to run
- <$10a month to run
05 · Claude Builder Club
I founded the official Claude Builder Club at U of T.
It’s at 450+ members now. I ran five workshops plus a live build-along for about 200 students at CUCAI.
06 · Side projects
A few other side projects.
- TalkLogicGeeseHacks 2025, second place overallA platform that stress-tests customer-service chatbots for hallucinations, built in two days.
- IN-ITHack the North 2025An AI red-teaming platform: one agent writes jailbreaks, another tries to catch them.
- Macro Placement ChallengePartcl and Hudson River Trading, 2026A $20,000 chip floorplanning competition. We finished around the top 35.
Experience
- May 2026 to nowShopifyApplied ML Engineering Internnow
I work on the LLM agents behind the shopping assistant people use in the app.
- Oct 2025 to Jul 2026PerfectiLead Engineer, Voice AI
Stayed on after the acquisition and took the voice platform from something that only worked in a demo to something 8,000+ brokers use across one of Canada’s leading mortgage networks.
- Jan to Mar 2026AnthropicClaude Campus Ambassador
Selected for the campus ambassador program, then founded the official Claude Builder Club at U of T. It’s at 450+ members now, and I ran five workshops plus a live build-along for about 200 students at CUCAI.
- Apr 2023 to Sep 2025Call FusionCo-founder
Started it in first year and ran it for two years before we sold. 150,000+ calls for 20+ clients by the end.
- Summer 2025HexawareSoftware Engineer Intern, AI/ML
Built two ML systems on my own, one that triages incoming support tickets and one that tracks head pose for remote exam proctoring.
About
What I build with
For coding I’ve used most of the harnesses out there. Cursor for a long time, then Claude Code and Antigravity, and lately Pi and Herdr, where I spawn subagents and agent teams and mix models across them based on how much reasoning the task needs. On the backend side it’s RAG pipelines, prompt and context engineering, evals and judge rubrics, and guardrails to keep a model in bounds. For fun I run an autonomous agent on a VPS that I talk to from my phone, with its own skills, cron jobs and routines. I was also an Anthropic campus ambassador, running workshops on Claude Code, MCP servers, agentic workflows and prompt engineering.
Now
It’s fall 2026. I’m at Shopify through December, and I’m applying for winter and summer 2027 internships in the US. I moved somewhere a fourteen-minute walk from the office this term, which has done more for how often I actually make it to the gym than any amount of planning did.
I just got back from Peru, my first trip off the continent with friends. Outside of work I read a lot about startups that failed and not much about the ones that worked, mostly because the failures are the ones you can actually take something from.
Let’s talk.
sparsh.kochhar@gmail.comI’m finishing Computer Engineering at the University of Toronto in April 2028, with minors in AI engineering and engineering business. Email is the easiest way to reach me.
Toronto, open to New York and the US