Simranjeet Singh

•Token infrastructure platform: scaled systems supporting $30M+ deposits and thousands of concurrent users. •Reduced API latency by 60% on high-read endpoints (staking/rewards) via cache-first Redis and query optimization. •Unified data layers across smart contracts, indexers, and APIs: eliminated state mismatches. •Productized staking/launchpool into repeatable DeFi playbook: safe rollouts, no one-offs. •Built MonID with account abstraction (ERC-4337): single wallet UX across games, slashed auth fragmentation. •Architected Collect Shiny NFT marketplace: physical card custody, Seaport protocol, portfolio APIs. •Automated inventory with LLM-powered OCR pipelines (Telegram, MCP): cut catalog time by 80%. •Shipped Morpho-integrated lending with real-time APY/risk data: treated as distributed systems problem. •Designed RWA vault (Lexium): async deposits, share accounting, delayed settlement handling. •Built Proof of Activity with gas sponsorship (Pimlico) and smart wallets: seamless Web2 onboarding. •Enabled cross-chain Layer 2 expansion with LayerZero/OFT, safe chain onboarding patterns. •Implemented RAG + vector search for card identification: image retrieval, pricing context via MCP. •Tech: NestJS, Ponder, OpenTelemetry, Morpho, ERC-4337, Ethereum, Seaport, Telegram API, MCP, LLM OCR

•AI-powered social media platform: led 4-engineer React Native team shipping to 50K+ MAU, raised quality without slowing delivery. •Drove 20% user growth via onboarding/engagement flows: made Web3 accessible to mainstream users. •Boosted session time 35% (measured via analytics) via state/query optimization and render fixes. •Shipped NFT marketplace with Ethereum smart contract integration and subgraph-backed mobile APIs. •Migrated to in-house Phinx wallet layer: account abstraction (ERC-4337), reusable auth across products. •Added ENS-style identity for on-chain naming and profile experiences. •Tech: React Native, Expo, Ethereum, Subgraphs, ERC-4337, Web3Auth, TanStack Query, Zustand

•Open-source DEX protocol on Solana: shipped the first concentrated-liquidity AMM on Solana, swaps, LP deposits, position management from scratch. •Adapted Uniswap V3 patterns for Solana: concentrated liquidity math, tick-based position tracking, fee-tier logic. •Built V2 protocol with Anchor: rebuilt concentrated-liquidity AMM from Serum-based V1 to modern architecture. •Built transaction-state UX + analytics for high-frequency traders: clarified pending vs confirmed. •Implemented Rust-informed Solana program debugging: traced contract-level execution for frontend integration. •Architected separation of ingestion/read models/UI state: cut debug time as complexity scaled. •Hid Solana network quirks behind async transaction handling: reliable wallet flows. •Tech: React, TypeScript, Solana, Anchor, Rust, Uniswap V3 patterns, Firebase, Hasura, Cloud Functions

•Digital collectibles & fantasy gaming platform: scaled TopRun fantasy game APIs supporting 10K+ DAU. •Built marketplace + admin APIs: orders, listings, auctions, sub-200ms response times. •Cut MTTR (mean time to recovery) 50% via observability-first logging and health checks. •Unified Ethereum smart contract events via subgraph indexing: eliminated raw chain reads. •Migrated from MongoDB to PostgreSQL + Sequelize: stronger relational model, query performance. •Tech: Node.js, PostgreSQL, Sequelize, MongoDB, Subgraphs, NFT marketplace, Ethereum