Sunny.
About

Sunny Radadiya

AI Engineer · Forward Deployed Engineer · Web3 & DeFi Systems

I'm an AI-focused product engineer, Web3 systems builder, and smart contract auditor working across AI agents, backend systems, DeFi infrastructure, automation, and blockchain security.

Over the last 8+ years I've worked across mobile development, backend APIs, smart contracts, DeFi protocols, AI-agent workflows, and automation platforms. My work spans production DeFi systems managing millions in user funds, AI-powered DeFi agents, autonomous research and product pipelines, and developer automation tools.

My current focus is AI engineering and forward-deployed product work: understanding real workflows, building useful AI features, evaluating output quality, and shipping systems that hold up in production.

I also take private smart contract audits for DeFi, cross-chain, vault, escrow, and settlement protocols.

I'm currently going deep on inference engineering — building benchmarked, first-principles POCs for LLM serving: local inference servers, concurrency, streaming/TTFT, KV and prefix caching, and continuous batching. I build it in the open at inference-poc-learnings.

What I like building

  • AI agents connected to real tools, data, and workflows
  • RAG systems, structured outputs, evals, and production AI pipelines
  • LLM inference and serving — batching, caching, streaming, and benchmarks
  • DeFi automation, smart-wallet flows, protocol integrations, and user-facing tools
  • Smart contract systems with strong security assumptions
  • Products that turn complex workflows into simple user experiences

Experience

  1. 06/2025 — Present
    Bangalore

    Independent Engineer & Smart Contract Auditor — Self-employed

    Independent AI/Web3 engineer and smart contract auditor working with DeFi teams, early-stage builders, and personal product experiments.

    • Private Solidity audits for DeFi, cross-chain, escrow, vault, and settlement contracts.
    • Line-by-line review for access control, signature/replay risks, accounting bugs, upgrade risks, and fund-stranding edge cases.
    • Foundry-based fuzz/invariant testing plus Slither, Aderyn, Semgrep, and Halmos.
    • Runnable proof-of-concept tests and clear reports for every engagement.
    • Independent AI product builds across agents, DeFi tooling, research automation, and developer infrastructure.
    • Service-based AI/Web3 engineering engagements for protocol teams and early-stage builders.
  2. 01/2025 — Present
    Remote

    Senior AI / Full Stack & Blockchain Engineer — ZyFAI

    Built AI-powered DeFi systems for ZyFAI, a yield agent that analyzes protocol opportunities and moves user funds across lending markets for better risk-adjusted returns.

    • Built AI-agent workflows for chat-based DeFi using LangChain, LangGraph, and pgvector.
    • Connected LLM workflows with DeFi protocol data, wallet positions, smart accounts, and on-chain execution.
    • Built protocol data pipelines across Aave, Morpho, Silo, Euler, Moonwell, and other lending/yield markets.
    • Designed rebalancing logic: when to move, when to hold, and how to compare yield against risk, liquidity, and cost.
    • Built portfolio tracking and earnings systems across multi-chain movement.
    • Implemented smart-wallet execution with session keys, GuardExecModule, and TargetRegistry.
    • Worked across product, backend, AI agents, smart contracts, and blockchain operations.
  3. 05/2023 — 12/2024
    Bangalore

    Founder & Product Engineer — DeFiLens

    Founded and built DeFiLens, an open-source multichain DeFi automation product focused on simplifying complex on-chain workflows across EVM networks.

    • Built cross-chain DeFi batching flows that removed manual bridging, network switching, and repetitive multi-step transactions.
    • Designed smart-wallet automation for lending, swapping, DCA, limit orders, and stop orders.
    • Built user-facing execution flows and dashboards for non-technical DeFi users.
    • Built Copy-Trade, an automation tool for replicating selected whale transactions.
    • Secured ecosystem bounties including Base network support.
    • Shipped live products across DeFi automation, smart-wallet workflows, and copy-trading.
  4. 10/2021 — 01/2023
    Remote

    Senior Solidity Developer — InfinityPools (formerly Lemma Finance)

    Worked on production DeFi infrastructure for Lemma Finance / InfinityPools, including basis-trading systems, delta-neutral stablecoin architecture, synthetic tokens, LemmaSwap, protocol integrations, and developer tooling.

    • Contributed to smart contracts for USDL, a basis-trading / delta-neutral strategy stablecoin.
    • Built and maintained Solidity contracts, periphery systems, and TypeScript deployment/test scripts.
    • Engineered LemmaSwap, a decentralized exchange designed around Lemma's protocol needs.
    • Integrated Lemma with DeFi platforms including Zapper, ParaSwap, and Forta monitoring bots.
    • Built SDKs and supporting libraries for protocol interaction.
    • Used Foundry, Hardhat, TypeScript, and JavaScript for testing, deployment, and production workflows.
  5. 01/2021 — 09/2021
    Remote

    DeFi Freelancer & Gitcoin Bounty Hunter — Independent

    Worked independently with DeFi clients, protocols, and open-source ecosystems to turn ambiguous product requirements into working smart contract systems and DeFi applications.

    • Built smart contracts for staking, yield farming, DEX operations, token swaps, and DeFi automation.
    • Delivered end-to-end DeFi features from requirement understanding to implementation, testing, and deployment.
    • Built Uniswap V2 / SushiSwap-style DEX forks and LP incentive mechanisms.
    • Integrated protocols including Idle Finance, BarnBridge, Uniswap, Badger, Reflexer, Biconomy, and Polygon.
    • Completed Gitcoin bounties and ecosystem grant work across multiple DeFi protocols.
    • Developed strong client-facing execution skills: scoping, fast prototyping, debugging, and shipping under ambiguity.
  6. 03/2020 — 01/2021
    Remote

    Solidity Developer — Chill Finance

    Built a Uniswap V2-style decentralized exchange for EVM chains, plus yield-farming and governance reward mechanisms.

    • Developed end-to-end Solidity contracts for DEX operations and liquidity provider incentives.
    • Designed staking, yield farming, and governance token reward systems.
    • Worked across smart contracts, testing, deployment, and protocol mechanics.
  7. 06/2018 — 09/2019
    Ahmedabad, Gujarat

    Software Engineer — Mobiuso Technologies

    Built Android healthcare applications and Django REST APIs, with responsibility across mobile features, backend APIs, deployment, and production support.

How I work

I like forward-deployed engineering because the hard part is rarely just writing code. The work starts with understanding the user workflow, mapping the data and constraints, building a fast prototype, measuring quality, and then hardening it into a production system.

  • Understand the workflow before choosing the architecture.
  • Build fast prototypes, then add evals, logs, and failure handling.
  • Prefer simple systems that users can trust over impressive demos.
  • Care about latency, cost, reliability, permissions, and safety.
  • Ship across product, backend, AI, and infrastructure.

Philosophy

The most exciting software of the next decade won't be traditional applications. It'll be intelligent systems that observe, reason, automate, and collaborate with humans. My goal is to build products and infrastructure that help make that future practical and accessible.

Education

B.E. Computer Science & Engineering
Parul University, Gujarat · 8.34 / 10 CGPA · 2018

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