Blockchain and Solidity development engineered like production software, not a token launch.
Smart contracts, the Ethereum and EVM ecosystem, and the Web3 applications around them — with a security-first Solidity practice and the full-stack engineering to connect contracts to real products, cloud services and devices. Engineering team based in Ahmedabad, Gujarat, India, building for clients primarily in the US.
Blockchain, Solidity & Web3 development services
Contracts that hold value are unforgiving: they are public, hard to change and expensive to get wrong. We treat them with the same discipline we bring to firmware that ships in the field — specified, tested to failure, and reviewed by a senior engineer before anything is deployed.
- Solidity smart contract design & implementation
- ERC-20 / ERC-721 / ERC-1155 / ERC-4626 token standards
- Upgradeable proxy architectures (UUPS / Transparent)
- Foundry & Hardhat test suites — unit, fuzz, invariant
- Static analysis & pre-audit security review
- Signature schemes: EIP-712, permit, account abstraction (ERC-4337)
- Ethereum mainnet, L2 rollup & EVM sidechain deployment
- Multisig, timelock & key-management setup
- dApp front ends, event indexing & backend services
Where AI accelerates
- Contract and test scaffolding
- NatSpec and documentation drafts
- Triage of static-analysis and fuzzing output
- Typed client and ABI binding generation
- dApp UI boilerplate
Where it stays human
- Threat modeling and invariant definition
- Access-control and upgrade-authority design
- Economic and incentive review
- Audit-readiness sign-off
- Key management and mainnet deployment
How we build smart contracts.
Solidity is the easy part. The discipline around it — specification, testing, upgrade control and operations — is what keeps a contract safe once it holds value.
Contract design before code
We start from what must be on-chain, who can change what, and which invariants must never break — then write the specification the code is tested against. Storage layout, upgrade path and failure modes are decided up front, not patched in later.
Security-first Solidity
Checks-effects-interactions, reentrancy guards, least-privilege access control, safe external calls, signature replay protection and oracle-manipulation resistance are defaults in how we write, not a review-stage afterthought. We build on audited OpenZeppelin components rather than re-implementing standards.
Testing that finds real bugs
Line coverage is not the goal — invariants are. We write unit tests, fuzz tests and stateful invariant tests in Foundry, run fork tests against live network state, and add static analysis (Slither) to CI.
Upgradeability, deliberately
Immutable where you can, upgradeable where you must. Proxy patterns, initializer safety and storage-layout checks, with upgrade authority held behind a multisig and timelock — because upgradeability is a trust assumption your users take on.
Gas and cost engineering
Storage access dominates cost on the EVM. We design data layout, batching and calldata use with gas in mind, and pick the network — mainnet or a rollup — against your users' transaction economics.
Deployment and operations
Scripted, reproducible deployments, verified source on block explorers, multisig-owned admin roles, monitoring and alerting, and a documented pause and incident procedure before anything holds value.
The Ethereum and EVM stack we work across.
Ethereum & EVM networks
Ethereum mainnet plus EVM-compatible Layer 2 rollups and sidechains — the same Solidity toolchain, different security, cost and liquidity trade-offs.
Token & protocol standards
Fungible and non-fungible tokens, multi-token contracts, tokenized vaults, gasless approvals via permit, typed-data signing (EIP-712) and smart-account flows with account abstraction.
Oracles & off-chain data
Price and data feeds (for example Chainlink), off-chain computation with on-chain verification, and IPFS-style content addressing for metadata — with explicit handling of stale or manipulated inputs.
Wallets & signing
Wallet connection, transaction and message signing flows, and the UX around confirmations, reverts and network switching that decide whether real users complete a transaction.
Indexing & backend
Contract events indexed into queryable APIs (subgraph or custom indexer), redundant RPC providers, and reorg-aware confirmation handling so your app reads chain state correctly.
Security tooling
Slither static analysis, Foundry fuzzing and invariants, fork testing, and where a contract's value justifies it, formal verification of critical properties.
From contract to a product people can actually use.
Wallet-connected dApp front ends
React/TypeScript front ends using modern libraries such as viem and wagmi: wallet connection, signing, transaction lifecycle and error states designed for people who are not crypto natives.
Hybrid on-chain / off-chain architecture
Keep trustless state on-chain and everything else — search, notifications, analytics, compliance workflows — in ordinary cloud services, connected through indexed events and signed messages.
Integrating chain into existing products
Adding wallet login, token-gated access, on-chain payments or attestations to a product you already run, without rebuilding it around a blockchain.
Where hardware meets blockchain
Device identity and signed telemetry from firmware, on-chain attestation of provenance or usage, and wallet-linked device ownership — engineered across firmware, cloud and contract as one system.
We are also candid about when a chain is the wrong tool. If a database and an API solve your problem, we will tell you that in the first call — see our note on building production smart contracts for how we think about what belongs on-chain.
Where teams usually bring us in.
Build a protocol or product from scratch
Specification, contracts, tests, deployment and the application layer, delivered as one engagement.
Review and harden existing contracts
Threat modeling, static analysis, fuzz and invariant testing, and a written findings list — plus audit preparation.
Add blockchain to a product you already run
Wallet login, token-gated access, payments or attestations integrated into your existing app, cloud or device platform.
What people ask before scoping blockchain development.
What does blockchain and Solidity development at Rivix include?
Solidity smart contract design and implementation, security-first testing (unit, fuzz and invariant), upgradeable proxy architectures, audit preparation, deployment and multisig/timelock operations, and the Web3 application layer around the contracts — wallet-connected front ends, event indexing and backend services — on Ethereum and EVM-compatible networks.
Which blockchains and networks do you work with?
Ethereum mainnet and EVM-compatible networks, including Layer 2 rollups and sidechains. The network is chosen against security assumptions, transaction cost, liquidity and ecosystem fit for your use case, not by default.
Do you audit smart contracts?
We review and harden contracts we build or inherit — threat modeling, static analysis, fuzz and invariant testing, and a written findings list. For contracts that will hold meaningful value, we recommend an independent third-party audit as well, and we prepare the specification, tests and documentation so that audit is faster and cheaper.
Can you tell us whether we even need a blockchain?
Yes, and we will say so plainly. Many products that start from 'we need a blockchain' are better served by a conventional database and API. We scope which parts of your system genuinely need shared, tamper-evident, permissionless state and keep everything else off-chain.
Can you connect blockchain to hardware or IoT products?
Yes — this is where our embedded background matters. Device identity and signed telemetry, on-chain attestation of provenance or usage, and wallet-linked device ownership all require firmware, cloud and contract work designed together. We also tell you when a chain adds cost without adding trust.
Where is the engineering team based?
Our engineering team is based in Ahmedabad, Gujarat, India, working with clients primarily in the US.
Blockchain work rarely ships alone.
Cloud & Device Platforms
Indexers, APIs and the services that sit beside your contracts.
Mobile & Web Apps
Wallet-connected front ends and mobile experiences.
Building Production Smart Contracts
Security, testing and upgradeability, in depth.
Foundry vs Hardhat
Choosing a Solidity testing framework.
The AI/Human Split
Exactly where AI accelerates our work and where a senior engineer stays in charge.