Security-first design
Checks-Effects-Interactions pattern, reentrancy guards, minimal privilege, and pull-over-push payment patterns are non-negotiable in every contract.
Solidity Smart Contract Development in Bangalore
Custom Solidity smart contracts: ERC-20 tokens, NFTs, DeFi logic, and protocol contracts. We treat every contract as a public attack surface, because it is. Fuzz tested, internally audited, and mainnet-deployed with verification.
EVM + Solana
Chain support
Foundry + Echidna
Fuzz testing
OpenZeppelin
Battle-tested base
NatSpec
Full documentation
Specification and threat modelling before code
Solidity with OpenZeppelin foundations
Hardhat + Foundry test suite
Slither static analysis
Mainnet deployment and block explorer verification
Third-party audit recommended
For contracts handling significant user value, we strongly recommend and facilitate third-party audits from firms like Trail of Bits, ConsenSys Diligence, or OpenZeppelin.
Fuzz testing coverage
Foundry invariant tests and Echidna property-based fuzzing catch edge cases that hand-written unit tests miss, particularly for mathematical operations and state transitions.
Upgradeable when needed
Transparent proxy or UUPS patterns for upgradeable contracts; immutable deployment for trust-minimised contracts where upgradeability is a liability.
Gas-optimised by default
Storage packing, event vs. storage trade-offs, batch operations, and unchecked arithmetic where safe, gas costs are a user experience consideration.
Full NatSpec docs
Every public and external function documented with NatSpec, readable developer documentation generated automatically from inline annotations.
Languages
- Solidity
- Vyper
- Yul / Assembly
- JavaScript
- TypeScript
- Python
Frameworks
- Hardhat
- Foundry
- Truffle
- Brownie
- Tenderly
- Remix IDE
Libraries
- OpenZeppelin
- Chainlink
- Safe Contracts
- Gnosis Safe
- Uniswap V3 SDK
- Compound
Testing
- Hardhat chai matchers
- Forge test
- Slither
- Echidna
- MythX
- Certora
Client SDKs
- ethers.js
- viem
- web3.js
- Alchemy SDK
- Moralis
- The Graph
Chains
- Ethereum
- Polygon
- Base
- Arbitrum
- Optimism
- BNB Chain
01
Spec & Threat Modelling
2–3 days
Contract specification with precise state machines, access control design, attack surface analysis, and economic security modelling before a line of Solidity is written.
02
Architecture Review
1 day
Upgrade strategy (proxy pattern selection), storage layout planning, cross-contract call flow, and gas estimation for key operations.
03
Development
1–3 weeks
Solidity implementation following Checks-Effects-Interactions, minimal attack surface, OpenZeppelin base contracts, and NatSpec documentation inline.
04
Testing
1–2 weeks
Unit tests, fork tests against mainnet state, fuzz testing with Echidna/Foundry, and static analysis with Slither covering all critical paths and edge cases.
05
Internal Audit
2–4 days
Manual security review against OWASP SWC registry, reentrancy analysis, access control review, and arithmetic overflow checks.
06
Mainnet Deployment
1 day
Deterministic deployment with CREATE2 where applicable, constructor argument verification, block explorer verification, and post-deployment smoke tests.
Frontend
- Next.js App Router
- React 18+
- Tailwind CSS
- Core Web Vitals tuning
Backend & data
- Node.js / Python APIs
- PostgreSQL
- Redis caching
- REST & GraphQL
Operations
- CI/CD pipelines
- Docker / Kubernetes
- Observability
- Security hardening
01
Architecture mapping
Dependencies, API contracts, compliance constraints, and performance budgets documented before sprint one.
02
Secure sprints
Two-week increments with GitHub access, demo recordings, and QA checkpoints, client visibility at every stage.
03
QA & handover
Automated tests on critical paths, security review, runbooks, and knowledge transfer to your team.
DAO tooling startup
- Challenge
- ERC-20 voting hooks lacked cap checks and timelock on admin pause.
- Simplileap solution
- OpenZeppelin patterns, Slither/Mythril, and audit documentation pack.
- Outcome
- External audit: zero critical findings post-fix.
Retail loyalty consortium
- Challenge
- Reward minting required multisig upgrades and metadata pinning.
- Simplileap solution
- ERC-1155 contracts, Timelock, and IPFS + CDN fallback.
- Outcome
- 48k wallets minted; external audit passed.
Currency
Package
Ideal for
Investment
Includes
Package
Smart contract development
Ideal for
Token & governance projects
Investment
₹3L – ₹10L
Includes
- Solidity / Hardhat
- OpenZeppelin patterns
- Audit prep
- Testnet + mainnet deploy
Package
DApp / Web3 product
Ideal for
Full-stack Web3
Investment
₹10L – ₹30L
Includes
- Smart contracts
- dApp frontend
- Wallet connect
- Indexer integration
Package
Audit documentation pack
Ideal for
Pre-audit teams
Investment
Scoped add-on
Includes
- Slither / Mythril
- Test coverage expansion
- Access control review
- External audit liaison
Company and Service positioning is reviewed for production delivery standards by Harsha Parthasarathy (Co-Founder, Strategy & Operations 24+ years IT veteran, IBM, Global Delivery, Program Management) and Keshav Sharma (Co-Founder, Engineering and Lead Architect, Full-stack engineering, product delivery and technical standards).
- Verified entity
Simplileap Digital LLP
- Recognition
- LLPIN
AAU-8582
- Startup India
DIPP83124
- Founded
November 2020
- Office
Residency Rd, Bengaluru, India
Common questions about smart contract development
A single contract type (e.g. ERC-20 token with custom vesting schedule) is our minimum scope. We do not implement contracts without a full specification phase, undefined requirements produce insecure contracts.
Yes, strongly, for any contract handling user funds. We conduct internal reviews as part of our process, but they do not substitute for specialist third-party audit firms. We can introduce you to firms we trust.
If the contract was deployed with a proxy pattern (Transparent or UUPS), yes. Immutable contracts cannot be changed by design, which is sometimes the correct security posture. We design upgrade strategies intentionally upfront.
All EVM-compatible chains, Ethereum mainnet, Polygon, Base, Arbitrum, Optimism, and BNB Chain. For high-value deployments, we recommend Ethereum L1 or audited L2s.
Storage layout review (packing variables to minimise slots), replacing storage reads with events where read is not needed on-chain, using immutable variables, batch functions, and unchecked arithmetic in proven-safe loops.
Ready to build production-grade contracts?
Tell us what you're working on. A senior lead, not a sales rep, replies within one business day.
