# Prabal Pratap Singh

> Prabal Pratap Singh (Prabal Parihar) is a Senior Full Stack Engineer based in Lucknow, India, who builds AI agents, LLM products and blockchain systems. Prabal designed and built the AI products Testimonia, Lettercape, Collabcape, Shotcape and NexAd, published under WitLabs. Prabal is also Full Stack Blockchain Lead at Warlands, where Prabal architected CopyPool, a Uniswap V4 liquidity-automation platform, and previously worked at OrzenHQ, KalpStudio, Mai Labs and CredShields.

Key facts:
- Role: Senior Full Stack Engineer (AI agents, LLM products, blockchain)
- Built AI products end-to-end: Testimonia (live), Lettercape (beta), Collabcape, Shotcape, NexAd
- Full Stack Blockchain Lead at Warlands (CopyPool, Uniswap V4 liquidity automation)
- Location: Lucknow, India (IST, UTC+5:30); remote preferred, open to US relocation; targeting AI labs, YC startups and crypto
- Experience: 6+ years (since March 2020): independent Web3 work and hackathons, then professional roles from November 2022

## Links
- Portfolio: https://prabal.pro
- GitHub: https://github.com/PrabalParihar
- LinkedIn: https://www.linkedin.com/in/0xprabal/
- X / Twitter: https://x.com/0xPrabalParihar
- ENS: 0xprabal.eth
- Email: prabalparihar95@gmail.com
- Resume (PDF): https://prabal.pro/Prabal_Pratap_Singh_Resume.pdf
- Resume, AI labs version (PDF): https://prabal.pro/Prabal_Pratap_Singh_Resume_AI.pdf
- Resume, YC startup version (PDF): https://prabal.pro/Prabal_Pratap_Singh_Resume_YC.pdf
- Resume, Web3 track (PDF): https://prabal.pro/Prabal_Pratap_Singh_Resume_Web3.pdf

## Projects
- [Testimonia](https://prabal.pro/projects/testimonia): Testimonials SaaS for Indian brands. Customers leave a review over WhatsApp or QR, the brand approves it, and it becomes Reels, social posts, website widgets and a Wall of Love. Status: Live. Live: https://testimonia.xyz
- [Lettercape](https://prabal.pro/projects/lettercape): On-brand email campaigns. Paste a website, get a brand kit, draft a campaign with AI, run six pre-send checks, then hand the draft to Klaviyo, Mailchimp and other email platforms. Status: Beta. Live: https://lettercape.com
- [CopyPool](https://prabal.pro/projects/copypool): Uniswap V4-native LP automation at Warlands: auto-range, compound, and exit. Status: Live. Live: https://copypools.com/
- [Landpatch](https://prabal.pro/projects/landpatch): GitHub App that migrates code off the shut-down OpenAI Assistants API. It finds the call sites, has a model patch them onto the Responses API, verifies the patch in a sandbox and opens a pull request only when verification passes. Status: Live. Live: https://landpatch.up.railway.app
- [Twokey](https://prabal.pro/projects/twokey): Approvals for AI agents that move money. The agent proposes, deterministic policy code decides, and anything that adds risk waits for a human approval sealed with SHA-256 to the exact terms. Status: Preview. Live: https://twokey-site-production.up.railway.app
- [Collabcape](https://prabal.pro/projects/collabcape): Creator-campaign workspace. An AI agent shortlists creators, breaks down their content and drafts outreach, all against a shared brand profile. Status: Preview. Live: https://creators.witlabs.org
- [Shotcape](https://prabal.pro/projects/shotcape): Video storyboarding. Turn a script, blog post or one-line idea into a scene preview built from licensed clips, then export the storyboard as JSON for a production team. Status: Preview. Live: https://video.witlabs.org
- [TradeAgent](https://prabal.pro/projects/tradeagent): Polymarket research agent. Grok and GPT forecast each market independently, then deterministic risk code sizes positions with fractional Kelly and simulates execution against the real order book. Status: Paper trading.
- [NexAd](https://prabal.pro/projects/nexad): AI ad workflows with founder approval. Drafts copy, creative variants and video scripts from a product page, then plans launches across Meta, Google, TikTok, YouTube, X and WhatsApp. Status: Preview. Live: https://nexad.digital
- [On-chain Identity and KYC](https://prabal.pro/projects/on-chain-identity-and-kyc): Identity and compliance contracts for real-world-asset (RWA) tokens and AI agents: DID registry, KYC credentials, trusted issuers, scoped agent delegation and Groth16 ZK verification. Status: Shipped.
- [Opportunity Studio](https://prabal.pro/projects/opportunity-studio): Autonomous coding-agent pipeline. Finds and verifies bounties and hackathons, plans a build, runs Claude Code or Codex in E2B sandboxes, reviews the output and reports progress to Telegram. Status: Shipped.
- [PolyLiquid](https://prabal.pro/projects/polyliquid): One ERC-4626 vault token holding stETH, rETH and sAVAX. Rebalances using Chainlink Data Streams and Automation, and moves across chains with Chainlink CCIP. Status: Shipped. Live: https://github.com/PrabalParihar/polyliquid
- [BuilderFi](https://prabal.pro/projects/builderfi): The automation layer for DeFi. Non-custodial, no-code strategies: LP automation (range, rebalance, compound), funding-rate arbitrage with automated hedging, and multi-step on-chain workflows run from your own wallet. Status: Early access. Live: https://builderfi.io
- [Digital Cash](https://prabal.pro/projects/digital-cash): Enterprise payment platform with tokenized ledger, CQRS, and real-time queue pipeline. Status: Shipped.
- [Cross-Chain DeFi Aggregator](https://prabal.pro/projects/cross-chain-defi-aggregator): Multi-chain yield optimization across Ethereum, Polygon, and Arbitrum with Chainlink and The Graph. Status: Shipped.

## Writing
- [How I stop an LLM from inventing customer reviews](https://prabal.pro/writing/stop-llms-inventing-reviews): Testimonia uses AI to help customers write reviews. These are the rules, enforced in code rather than prompts, that keep it from writing reviews nobody gave.
- [Running coding agents unattended: sandboxes, leases and budgets](https://prabal.pro/writing/running-coding-agents-unattended): What it took to let Claude Code and Codex build and submit projects without a human watching: isolation, crash-safe state and spending limits.
- [Let the model forecast. Never let it size the bet.](https://prabal.pro/writing/let-the-model-forecast-not-size-the-bet): Building a prediction-market research agent with Grok and GPT, where every money decision is plain, deterministic code.
- [Now](https://prabal.pro/now): what Prabal is building and open to right now

## Optional
- [Full profile for LLMs](https://prabal.pro/llms-full.txt): experience, skills, awards and FAQ in one file