Token & ICO Platforms
ERC-20, ERC-721, ERC-1155, ERC-4626 vaults, ERC-721A optimised mints, vesting schedules, governance tokens, and compliant launch infrastructure (KYC gating, lockups, allowlists).
Blockchain Development
Smart Contracts, DeFi & Web3 Engineered Security-First
We build production-grade blockchain applications — audited Solidity and Move smart contracts, DeFi protocols, NFT and tokenisation platforms, Layer 2 rollups, and enterprise web3 — on Ethereum, Polygon, Arbitrum, Base, Optimism, and Solana, with security-first engineering and the audit-trail discipline regulators and treasuries actually require.
Foundry · Slither · Pre-audit hardened · Senior Solidity engineers
EVMSolana · Move
AuditedSlither · Foundry · Echidna
L1+L2Ethereum · Polygon · Base
100%Senior-reviewed
Blockchain Solutions We Build
From audited token launches to DeFi protocols and enterprise tokenisation — engineered with the security-first rigour that adversarial environments demand.
DeFi Protocols
AMMs, lending protocols, yield aggregators, staking systems, perpetuals, RWA tokenisation — built with the security posture DeFi actually needs (invariants, fuzzing, formal-ish reasoning).
NFT Platforms
NFT minting, marketplaces, royalty enforcement, fractionalisation, dynamic NFTs, soul-bound tokens, and ERC-6551 token-bound accounts — backend + frontend + smart contracts.
Enterprise & Permissioned Chains
Hyperledger Fabric / Besu deployments, permissioned EVM chains, supply-chain provenance, and tokenisation pilots for banks, treasuries, and corporates.
Smart Contract Audits & Hardening
Pre-audit reviews, invariant testing with Foundry/Echidna, Slither static analysis, gas optimisation, and remediation work on existing contracts before public audit.
Web3 dApps & Wallets
React/Next.js dApps with wagmi/viem, Account Abstraction (ERC-4337), social logins via Web3Auth/Magic, gasless transactions via Biconomy, and embedded smart-account wallets.
Industries We Serve
DeFi, NFT, real-world assets, supply chain, GameFi, treasury, DAO, and enterprise web3 across India and global markets.
DeFi & FinTech
NFT & Creator
Supply Chain
Real Estate / RWA
GameFi / EdTech
Healthcare Records
Provenance
Treasury & DAO
Blockchain Stack & Tooling
Modern smart-contract languages, audit-grade toolchains, oracles, indexers, and account-abstraction infrastructure.
Solidity 0.8+Language
VyperLanguage
Move (Aptos/Sui)Language
Rust (Solana)Language
FoundryToolchain
HardhatToolchain
OpenZeppelinLibraries
wagmi / viemFrontend
ethers.js / web3.jsFrontend
The GraphIndexing
ChainlinkOracles
ERC-4337 AAUX
Our Blockchain Development Process
A six-step rhythm engineered so smart contracts pass audits, dApps win users, and treasuries sleep at night.
Scope & Threat Model
We scope tokenomics, contract surface, oracle dependencies, upgrade strategy, and threat model — including economic attacks, MEV, governance attacks, and bridge risk.
Contract Architecture
Contract layout, proxy pattern (UUPS/Beacon), storage layout, access control (multisig, timelock, roles), upgrade governance, and event design for The Graph indexing.
Implementation & Tests
Solidity/Move/Rust implementation with Foundry-based fuzz tests, invariant tests with Echidna, Slither/Mythril static analysis, and >95% coverage.
Pre-Audit Hardening
Gas optimisation, reentrancy + access control reviews, MEV mitigations, oracle manipulation tests, and remediation of any issues we find before external audit.
Deployment & Indexing
Mainnet/L2 deployment via Foundry scripts, multisig wallet handover, The Graph subgraph, dApp + admin console, and a public verifier (Sourcify, Etherscan).
Operations & Monitoring
On-chain monitoring (Tenderly, Defender), incident playbooks for paused/upgraded contracts, treasury operations support, and quarterly security reviews.
Why Choose Hendoi for Blockchain
Six commitments that separate web3 projects that survive incidents — from ones that announce a "post-mortem" after their TVL disappears.
Security First, Not Second
Smart contracts are public, immutable, and adversarial. We invest heavily in fuzzing, invariants, Slither/Mythril, and pre-audit reviews — because reverts at the audit stage cost real money.
Foundry-Native Engineering
We use Foundry as default — fast tests, fuzzing built in, invariants, cheatcodes for fork testing — the modern way to ship Solidity confidently.
On-Chain Observability
Tenderly + Defender + custom monitoring scripts so you know within minutes if something unusual happens on your contracts — not days later via Twitter alerts.
Honest About Web3 Trade-offs
We will tell you when a problem does not need a blockchain. When it does, we recommend the right L1/L2 mix — not the one with the largest ecosystem fund.
Senior Engineers Only
Architecture reviewed by Sundarapandi Muthupandi (CEO). The engineers who write your contracts are the ones who run the fuzz tests at 2 AM.
Transparent Engagement
Weekly demos with deployed test-net contracts, direct access to engineers, signed SOWs with documented threat model, and predictable burn.
Engagement Models
Pick the shape that matches whether you need a focused contract, a full protocol launch, or audit-remediation care.
Smart Contract Sprint
Fixed-scope build of a specific contract set — ERC-20 with vesting, an NFT collection, a vault — with tests, Slither analysis, and testnet deployment.
- Focused contract scope
- Foundry fuzz + Slither
- Testnet deployment
Full Protocol Build
Coordinated programme to design and build a full protocol — contracts, dApp, indexing, monitoring — with pre-audit hardening and mainnet deployment support.
- Contracts + dApp + indexing
- Pre-audit hardening
- Mainnet launch support
Audit Remediation & Retainer
Remediate audit findings, monitor live contracts, ship feature upgrades, and respond to incidents — under a predictable monthly retainer.
- Audit remediation
- On-chain monitoring
- Incident response
Real-World Use Cases
Representative blockchain projects engineered for D2C, RWA, NFT, settlement, GameFi, and provenance use cases.
D2C Loyalty Tokenisation
ERC-1155 loyalty point system for a D2C brand on Polygon — gasless via Biconomy, redemption logic, expiry, and a customer-facing wallet with social login.
Tokenised Real-World Asset Vault
ERC-4626 vault tokenising real-world receivables — KYC-gated minting, allowlists, redemption windows, and Chainlink oracles for off-chain pricing.
Generative NFT Drop
ERC-721A optimised generative drop for an art project — Merkle-tree allowlists, reveal-after-mint, royalty enforcement, and a polished mint dApp.
Cross-Border Settlement PoC
Permissioned Besu chain for a remittance corridor pilot — atomic swaps, hashed-time-lock contracts, and a regulator-visible audit explorer.
GameFi In-Game Economy
On-chain item economy for a Web3 game on Base — minting, trading, soul-bound progression items, and an account-abstraction wallet for casual players.
Supply Chain Provenance
Provenance and authenticity platform on Polygon for a premium consumer brand — QR-linked NFTs proving chain-of-custody from factory to consumer.
Frequently Asked Questions
Common questions founders and corporates ask before committing to a blockchain build.
Do I even need a blockchain for my use case?
Probably not, honestly. Most problems are better solved with a regular database and good UX. Blockchain pays off when you need permissionless settlement, censorship resistance, on-chain provenance, or programmable digital assets. We will tell you the truth before quoting.
Which chains do you support?
EVM chains (Ethereum, Polygon, Arbitrum, Optimism, Base, Avalanche, BNB Chain), Solana (Rust), Aptos and Sui (Move), and permissioned chains (Hyperledger Besu/Fabric). We pick based on your fees, finality, ecosystem, and regulatory posture.
How do you handle security?
Foundry-based fuzz and invariant tests, Slither and Mythril static analysis, OpenZeppelin libraries where applicable, pre-audit reviews, and remediation against an external audit before mainnet. Plus on-chain monitoring (Tenderly, Defender) post-launch.
Do you arrange external audits?
Yes — we have working relationships with reputable auditors (we are happy to share names privately). We do extensive pre-audit hardening to keep audit findings small and remediation cycles short.
What about regulatory compliance?
For Indian customers, we work within RBI/SEBI/Income-Tax guidance and avoid retail token-distribution patterns that are uncomfortable for Indian regulators. For global launches, we partner with legal counsel for jurisdiction-specific advice (we are not lawyers).
Can you integrate Account Abstraction (ERC-4337) for gasless UX?
Yes — we deploy ERC-4337 paymasters, bundlers, and smart-account wallets for sponsored transactions, batched ops, and social-login flows. This is often the difference between a usable consumer dApp and a developer toy.
How long does a blockchain project take?
A focused smart-contract sprint: 4-6 weeks. A full protocol build with dApp, indexing, and hardening: 4-9 months. We share a milestone plan with testnet deployments at every demo.
What does a blockchain project cost?
Smart contract sprints typically run INR 5-15 lakh. Full protocol builds can run INR 30 lakh and up depending on scope, audit budget, and frontend depth. We share transparent estimates after a discovery call.