Simranjeet Singh
Senior Software Engineer with 5+ years building full-stack and distributed systems across React, Node. js, Go, and Type Script. Experienced in designing event-driven architectures, idempotent workflows, and reliability-focused backend systems for transaction-heavy products.
Proven track record leading cross-team delivery, mentoring engineers, and shipping production systems at scale: spanning identity, marketplace, onboarding, rewards, and DeFi protocols. Active in AI/LLM integration, including RAG pipelines, agentic workflows, and vector search.
Experience
Senior Software Engineer
Mon Protocol
Remote, Singapore
- 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 Layer Zero/OFT, safe chain onboarding patterns.
- Implemented RAG + vector search for card identification: image retrieval, pricing context via MCP.
- Tech: NestJS, Ponder, Open Telemetry, Morpho, ERC-4337, Ethereum, Seaport, Telegram API, MCP, LLM OCR
Senior Software Engineer
Pop Social
Remote, Dubai
- 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, Tan Stack Query, Zustand
Fullstack Developer
Cykura
Remote
- 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, Type Script, Solana, Anchor, Rust, Uniswap V3 patterns, Firebase, Hasura, Cloud Functions
Fullstack Developer
Colexion
Gurgaon, India
- Digital collectibles & fantasy gaming platform: scaled Top Run 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 Mongo DB to Postgre SQL + Sequelize: stronger relational model, query performance.
- Tech: Node. js, Postgre SQL, Sequelize, Mongo DB, Subgraphs, NFT marketplace, Ethereum
Education
Guru Gobind Singh Indraprastha University (IPU), Delhi
B.Tech
Skills
TypeScriptGoSolidityRustSQLNode.jsNestJSPostgreRedisKafkagRPCGraphQLmicroservicesReactNext.jsReact NativeTanStack QueryZustandTailwind CSSEVMSolanaLayer 2DeFi protocolsNFT marketplacesSubgraphsHardhat/FoundryRAGAgentic workflowsMCPOpenAI/Anthropic APIs
Projects & Open Source
oxbin (Go, Sui)
•Built at ETHGlobal New Delhi 2025: a terminal-first decentralized pastebin/file-sharing workflow. •Implemented on-chain content anchoring with developer-friendly CLI ergonomics and lightweight sharing semantics.
Safu Pass (React.js, Solidity, Subgraph)
•Built at ETHIndia 2023: fullstack password manager with React frontend, Solidity contract logic, and subgraph- backed indexed reads. •Modeled user access and verification behavior with contract events surfaced through API-friendly indexed data.
Grid1 (React.js, Solidity, Subgraph)
- Built at ETHIndia 2022 and won The Graph prize for a subgraph-powered implementation.
- Developed a forkable NFT collection builder dApp with end-to-end integration across contracts & indexed queries.
QuickSwap / interface-v2
•Improved swap-screen responsiveness by tightening query dependencies, cache/state sync, and hook-based UI code- paths to reduce unnecessary re-renders.
project-serum / swap-ui
•Built two-way swap interactions, improved price, owned-token, and wallet-balance visibility for clearer executions.