· Projects
Things Sarthak is building
10 projects — each one is a separate landing page, links out below.
· AI surfaces
Three takes, same source
Each card is the actual opening of a full AI-written page about Sarthak. Click in.
What I am building
I am building Karte as a personal presence product: part Linktree replacement, part personal website, part personal chatbot, with shareable generated profile modes layered on top.
Contact
Reach out
Use a verified DM if you want a real reply. For public context, start with the projects and links on this page.
Blog
Writing
Post 01
Why I am building Karte
May 2026
Notes on replacing link-in-bio pages with personal sites, chat, and shareable profile modes.
Read article ->
Post 02
Product lessons from shipping AI profiles
Apr 2026
How memory, links, projects, and public context can compound into a better personal website.
Read article ->
Post 03
The personal website should talk back
Apr 2026
A short argument for profiles that answer questions instead of only listing links.
Read article ->
Experience
Software Engineer@ VaultWealth (Peak XV)
Feb 2025 — Present
Backend services, durable workflows for financial planning. Cut unexpected failure rate ~90%. Building AI-assisted product surfaces.
Backend + Data Engineer@ Front.Page (YC S21)
Jan 2022 — Jan 2025
Real-time market pipeline scaled 15k → 200k DAU; tail latency 600ms → 60ms. BERT/Milvus vector feed (+40% engagement). RAG support agents cut human load 90%.
AI Revamp: What I am building
I build the rails AI runs on — and the products that ride them. Backend + AI infra at VaultWealth (Peak XV). Previously Front.Page (YC S21). Building Karte, CodeVetter, SaaS Maker, free-ai, high-signal, tinygpt on the side.
AI Revamp: Experience
Software Engineer | VaultWealth (Peak XV) | Feb 2025 — Present | Backend services, durable workflows for financial planning. Cut unexpected failure rate ~90%. Building AI-assisted product surfaces. Backend + Data Engineer | Front.Page (YC S21) | Jan 2022 — Jan 2025 | Real-time market pipeline scaled 15k → 200k DAU; tail latency 600ms → 60ms. BERT/Milvus vector feed (+40% engagement). RAG support agents cut human load 90%.
Spotlight
AI Revamp: Collaborate
Interested in AI infrastructure, developer tools, or personal presence products? Let’s talk.
Book a call◆ Timeline
May 2026·Shipped
Released TinyGPT — 0.8M-param transformer in the browser
PyTorch model compiled to WebAssembly + WebGPU. Trains and runs entirely client-side.
May 2026·Launched
Launched Karte — link-in-bio that answers back
Calling card profiles with four AI surfaces (chat, encyclopedia, newspaper, roast) on top of a Cloudflare Workers / D1 / free-ai stack. The page you are reading.
April 2026·Shipped
Shipped high-signal
Evidence-backed, versioned signal log for AI infra / semiconductors. Research artifact first; product layer later. NLP pipeline scoring SEC filings, news, and Reddit.
February 2026·Shipped
Built SaaS Maker — drop-in backend services
Feedback, waitlist, testimonials, changelog, analytics, forms, roadmap, AI gateway, chatbot. The infrastructure layer behind several solo products.
February 2026·Shipped
Shipped free-ai — LLM gateway on Cloudflare Workers
OpenAI-compatible API router across free providers. Powers Karte's free tier and several other side projects.
November 2025·Shipped
Built CodeVetter — AI code review desktop app
Static-analysis + LLM reasoning over a PR. Desktop client because the SaaS path was too noisy.
October 2025·Shipped
Cut unexpected failures ~90% on durable financial workflows@ VaultWealth
Built reliability primitives around Temporal — retries, idempotency, downstream-failure handling.
February 2025·Joined
Joined VaultWealth — backend + AI infrastructure@ VaultWealth (Peak XV)
Peak XV-backed. Building financial planning systems + reliability infra for the UAE market.
September 2024·Shipped
Shipped RAG support agents that cut human load ~90%@ Front.Page (YC S21)
Vector store + retrieval + grounded generation, integrated into the existing support flow.
January 2024·Shipped
Vector-powered personalized feed lifted engagement +40%@ Front.Page (YC S21)
BERT embeddings + Milvus vector search replaced the heuristic ranking. A/B confirmed.
June 2023·Shipped
Scaled real-time market data pipeline 15k → 200k DAU@ Front.Page (YC S21)
Tail latency 600ms → 60ms. Rewrote the hot path on Kafka + Go; ClickHouse for analytics.
January 2022·Joined
Joined Front.Page (YC S21) — backend + data infrastructure@ Front.Page (YC S21)
Fintech social platform. Spent 3 years on the backend, real-time pipelines, vector feeds, and RAG.