Smart Contract Development in Mumbai
e10 Infotech is a smart contract development company in Mumbai writing, testing and auditing Solidity and Rust contracts before they hold real money.
Smart contract development for code that cannot be patched quietly
A deployed contract is public, immutable by default and holds value that anyone may try to take. That changes how it should be written. e10 Infotech Private Limited builds contracts test first, states the invariants that must never break, then attacks them with fuzzing and static analysis before an independent auditor sees the code. Nothing reaches mainnet without a specification, full branch coverage, an audit with findings closed and a rehearsed emergency procedure. Businesses in Mumbai come to us when the contract is the part of the system that cannot afford to be wrong.
What we write
- Token contracts including ERC-20, ERC-721, ERC-1155 and restricted transfer standards
- Staking, vesting, escrow and treasury contracts with timelocked administration
- Automated market makers, lending markets, vaults and yield strategies
- Marketplaces with royalties, offers, auctions and settlement logic
- Governance modules, voting, delegation and proposal execution
- Account abstraction, paymasters, session keys and gas sponsorship
- Bridges, message consumers and cross chain verification logic
How we work
Specification comes first and in plain language: what each function must do, who may call it, what must remain true afterwards. Those invariants become properties that Echidna and Foundry fuzzing attack for millions of runs. Unit tests cover every branch, fork tests run against real mainnet state, and Slither plus manual review catch the patterns tools are good at finding. Gas is profiled per function against a budget agreed up front. We then brief an independent auditor, fix findings, retest and publish verified source. Upgradeability is a deliberate decision rather than a default, and where a proxy is used the storage layout, admin keys and timelock are documented before deployment.
Where this fits
Smart Contract Development is the on-chain logic layer of our Web3 Development practice. The network it runs on comes from Blockchain Development, issuance from Token Development, and compliance restricted instruments from RWA Tokenization. Financial mechanics are designed with DeFi Development, trading venues with Crypto Exchange Development, digital ownership with NFT Marketplace Development, governance with DAO Development, and signing and user access with Crypto Wallet Development. Interfaces and back ends around the contracts come from Web Development and Software Development.
Security practice
We assume every external call is hostile and every price feed can be manipulated. Reentrancy guards, checks before effects, pull payments, slippage bounds, oracle staleness checks and access control on every privileged function are baseline rather than hardening. Admin roles are split, timelocked and held by a multisig with documented signers. Pause switches exist where pausing is safe and are absent where pausing would trap funds. Before launch we run an incident rehearsal so your team knows who signs what when something goes wrong at three in the morning.
What you get at handover
Contract source verified on the block explorer, the full test suite with coverage and fuzzing configuration, deployment scripts and addresses per network, the independent audit report with remediations closed, a gas profile, the invariant specification, an admin key and emergency runbook, and a thirty day warranty on behaviour that does not match the specification.
Working with businesses in Mumbai
Work for clients in Mumbai runs remote first: a named engineering team, a scope agreed in writing before anything starts, and demos on a fixed cadence you can hold us to. Working hours overlap your business day and everything is delivered in English.
Where a contract touches regulated activity, the permitted design differs by jurisdiction, so we confirm what applies to businesses in Mumbai with your counsel before the specification is signed off. That answer shapes the code rather than following it.
You get one point of contact, senior engineers on delivery, and reporting tied to audited, deployed contracts rather than activity. Businesses in Mumbai and the wider region are supported on the same terms.
Ready to get your contracts written properly?
Send us the mechanism you need on chain and we will send a specification outline, an audit plan and a quote.
Serving Mumbai and the wider region.
Queries raised before signature
Everything worth knowing about Smart Contract Development in Mumbai.
01Which languages and chains do you support?
Solidity and Vyper on EVM networks, Rust for Solana and CosmWasm, and Move for Aptos and Sui. Chain choice is made against your users and cost profile rather than our preference.
02Do you audit contracts you did not write?
Yes. We run a review covering access control, arithmetic, external calls, oracle assumptions and economic attacks, and deliver a findings report with severity ratings and suggested fixes.
03Is an external audit really necessary?
For anything holding user funds, yes. Our internal testing catches most defects, but an independent reviewer with no attachment to the design catches the ones we rationalised away.
04How much does a smart contract cost to build?
A standard token with vesting is a small engagement. A lending market, AMM or bridge is a much larger one because the economic design and audit effort dominate the coding time.
05How long does it take?
Two to four weeks for straightforward contracts including internal testing, plus two to four weeks for an external audit and remediation. Complex protocol work runs several months.
06Should contracts be upgradeable?
Only when the trade off is understood. Upgradeability means an admin can change the rules, which is a trust assumption and an attack surface. We use timelocks and multisig control where it is justified.
07How do you keep gas costs down?
Storage writes are minimised, data is packed, loops are bounded, events replace on-chain reads, and batch entry points are provided. Every function is profiled against a gas budget set at specification time.
08What if a vulnerability is found after launch?
The emergency runbook covers who is contacted, which pause or migration path is used, how funds are secured and how disclosure is handled. It is written and rehearsed before deployment.
09Do you handle deployment and verification?
Yes. Deployment is scripted and reproducible, addresses are recorded per network, source is verified on the explorer, and admin keys are transferred to your signers at handover.
10Can you fix or extend contracts we already have deployed?
Yes, within what the existing design allows. We review first, document actual behaviour against intended behaviour, then propose either an upgrade, a wrapper or a migration.
11What is invariant testing?
It is stating a property that must always hold, such as total supply matching the sum of balances, then having a fuzzer generate random call sequences trying to break it. It finds bugs that example based tests miss.
12Who holds the admin keys?
You do. Keys are generated by your signers, held in a multisig, and we never retain production key material. Our deployment access is revoked at handover.
13Do you offer Smart Contract Development in Mumbai?
Yes. e10 Infotech delivers Smart Contract Development for businesses in Mumbai and the wider region, remote first with a named team and a scope agreed before work starts.
14How do you run Smart Contract Development projects for clients in Mumbai?
Working hours overlap the Mumbai business day, communication is in English, and you get one point of contact with reporting tied to audited, deployed contracts rather than activity.
Sign off and we start
Tell us what you are trying to build. You will hear back from an engineer, not a sales desk.
- For
- e10 Infotech Private Limited
- Office
- Mumbai, Maharashtra
- Established
- 2011
- Direct line
- +91 86574 40720