Kolkata
Raihan Khan
Product & AI Engineer
I take AI products from idea to shipped, owning both the product thinking and the engineering.
Member of Technical Staff at 
Graphify Labs (YC S26), and building ColdVisit on the side: an agent that tests critical user journeys in a real browser on every pull request. Before that I shipped GenAI for HSBC 
Defra 
AWS and 
Marsh McLennan at eSynergy, and built Polygon Copilot and 
Mantle Copilot at Layer‑E.
In flight · YC S26Graphify LabsMember of Technical Staff since Sep 2026. Graphify turns codebases into a knowledge graph that AI coding assistants query, trace and cite.
On the sideColdVisitAn agent that opens a real browser and tests critical user journeys on pull-request previews, before they merge.01 — Departures
Things I've shipped
- 2026
DiffJuryPaste a GitHub PR; Jev decides if it's risky. A PR risk router and code review coachTypeSafe Jev testsLIVE - 2026
FirstScreenPaste a URL and Jev judges the first screen: promise, CTA, pricing, trust and a verdictTypeSafe Jev testsLIVE - 2026
JevArenaTwo Jev agents duel in click-only browser games, live, side by sideTypeSafe Jev testsLIVE - 2026
ColdVisitCatch broken flows before they merge: an agent tests your key journeys in a real browserProductsLIVE - 2026
SparrowAn iMessage Remittance Agent that lets you transfer money seamlessly across bordersProductsLANDED - 2025
Algorand Raycast ExtensionPerform all of Algorand operations from your toolbarDeveloper toolsLANDED - 2025
Cash DriveCloud storage platform that lets you monetize your dataProductsLANDED - 2025
deepROpen source, academic-style deep research platformAgents & protocolsLANDED
02 — Experience
Where I've worked
Since 2023. Graphify Labs and ColdVisit now, then the roles before them.
Graphify LabsNow
Sep 2026 – now
Member of Technical Staff
Full-time · Remote, San Francisco
ColdVisitNow
Sep 2026 – now
Founder
Wyzr
Jan 2024 – Aug 2026
- Founding AI EngineerFeb 2024 – Aug 2026
- AI Developer ConsultantJan 2024 – Feb 2024
Part-time · Remote, UK
Doczen
Jun 2024 – Feb 2026
- AI Product ManagerSep 2025 – Feb 2026
- Sr. AI Product EngineerJun 2025 – Sep 2025
- Applied AI & Software EngineerJun 2024 – Jun 2025
Part-time · Remote, London
XMTP
Nov 2024 – Dec 2025
AI Product & Integrations Engineer
Freelance · Remote, US
03 — Passport
Places I've been
Every trip so far, flown out of Kolkata. I shoot photos and short clips wherever I go; each country opens a rough journey of them.
Japan
7 places · 26 of my shots
Mt. Fuji is the most serene and beautiful thing I've ever seen
04 — Mail
Postcards from 1 city
Pick one of my travel photos, add a stamp and a sticker, and sign it from wherever you are. Your city and flag go on the card, your pin goes on the map, and the postcard flies onto the wall.
1 postcards · 1 country
- Sukrit · Sheoraphuli 🇮🇳
Every pin is a postcard. HoverTap one.
Postcard of the day
