$0 Client Funds Lost95%+ Test Coverage30+ Contracts Deployed
Smart Contract Development · Solidity & Rust
Smart ContractsReentrancy-Proof
Production Solidity and Rust contracts with OpenZeppelin security patterns, exhaustive test suites, and audit-ready code from day one. Zero client fund exploits. Ever.
H
A
R
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5★ client satisfaction
StakingVault.sol
contract StakingVault is ReentrancyGuard, Ownable {
uint256 private totalStaked;
mapping(address => uint256) balances;
function deposit() external nonReentrant
}
21k avg gas
Optimized
0 vulnerabilities
Security scan
Audit-Ready
Gas-Optimized
0 Exploits
SolidityOpenZeppelinHardhatFoundryethers.jsChainlinkSlitherMythrilWagmiThe GraphIPFSERC-20ERC-721ERC-1155UUPSGnosis SafeSolidityOpenZeppelinHardhatFoundryethers.jsChainlinkSlitherMythrilWagmiThe GraphIPFSERC-20ERC-721ERC-1155UUPSGnosis Safe
Security Record
$0lost
Zero client fund exploits, ever
Contracts deployed30+
Security findings fixed100%
External audit pass rate100%
Across all mainnet deployments since 2021
30+
Contracts Deployed
EVM + Solana
95%+
Test Coverage
Critical paths
8+
Chains Supported
ETH, Polygon, Base…
3yr
In Production
Zero incidents
We deploy to
Ethereum Mainnet
Max security
Polygon / Arbitrum
Low-fee EVM
Base / Optimism
Coinbase ecosystem
Solana
High throughput
What We Build
Six contract types, one engineering team
From simple ERC-20 tokens to full DeFi protocol suites — all security-first and gas-optimized.
ERC-20 Tokens
Fungible tokens with minting, burning, vesting schedules, snapshot governance, and fee-on-transfer mechanics — deployed on any EVM chain.
ERC-20VestingGovernance
NFT Contracts
ERC-721 and ERC-1155 with lazy minting, on-chain royalties (EIP-2981), reveal mechanics, allowlists, and marketplace compatibility.
ERC-721ERC-1155Royalties
DeFi Protocols
AMMs, lending pools, yield farming, staking, and liquidity mechanisms — invariant-tested with timelocks, multi-sig, and emergency pause functions.
AMMStakingLending
DAO Governance
On-chain voting, proposal systems, timelocked execution, and treasury management — compatible with Snapshot, Tally, and custom frontends.
VotingTreasuryTally
Multi-Sig Wallets
Gnosis Safe-compatible custom multi-sig contracts for treasury management, team operations, and protocol governance with configurable thresholds.
Multi-SigTreasuryGnosis
Custom Business Logic
Escrow, tokenized real-world assets, supply chain provenance, licensing, and revenue sharing — any business rule that benefits from trustless execution.
EscrowRWARevenue Split
Not sure which contract type fits your project?
Talk to us for freeSmart Contract Risks
Why contracts get exploited
Over $3B has been drained from blockchain protocols. The same patterns appear again and again. Here's how we prevent each one.
exploit_analysis.log
RISK #01
Reentrancy Attacks Drain Funds Instantly
The DAO hack, Cream Finance, and dozens of other exploits all shared one root cause: reentrancy. An attacker calls back into your contract before the first execution finishes — draining balances that haven't been zeroed yet. Unlike a web app bug, there's no rollback. The funds are gone the moment the transaction confirms.
Our approach
ReentrancyGuard on every state-changing function, checks-effects-interactions pattern enforced throughout, and fuzz testing with attack-vector scenarios before any mainnet deployment.
All four risks addressed in every engagement.Talk to us
Security First
Code is law. Bugs are permanent.
We treat every contract as if it will hold $10M the day it deploys. Because sometimes it does.
Slither + Mythril
Static Analysis on Every Contract
Slither and Mythril run as part of every CI pipeline. We resolve all high and medium findings before delivering the codebase — never shipped around.
Reentrancy detection
Integer overflow checks
Access control analysis
Dangerous delegatecall patterns
Hardhat + Foundry
95%+ Test Coverage, Attack-Vector Focus
Unit tests aren't just for happy paths. We model reentrancy attacks, flash loan scenarios, integer edge cases, and access control bypasses in the test suite.
Fork testing against mainnet state
Fuzz testing for invariants
Integration tests for multi-contract flows
Gas benchmarks per function
Pre-Audit Prep
Internal Audit Before External Audit
We deliver an internal security report with every engagement. If you're going for an external audit, we prepare the codebase to arrive clean — saving you $10K–$30K in remediation cycles.
Attack surface documentation
Threat model per contract
All findings remediated
Audit-ready README + NatSpec
Deployment Lifecycle
Spec → Audit → Mainnet
A repeatable 5-phase process that ships secure, gas-efficient contracts — from the first line to post-launch monitoring.
01
Week 1Spec & Attack Surface Mapping
Business logic formalized into a contract specification. We identify the attack surface upfront — external calls, state transitions, access control boundaries, and oracle dependencies. Deliverables: functional spec, threat model, and architecture diagram.
02
Week 1–4Development & Unit Testing
Contracts written in Solidity with OpenZeppelin security patterns. Every function has unit tests in Hardhat or Foundry, targeting 95%+ coverage with explicit attack-vector test cases. Fork tests run against mainnet state for DeFi integrations.
03
Week 4–6Security Audit & Gas Optimization
Slither and Mythril static analysis runs on every contract. Gas profiling on every public function — storage reads/writes, calldata vs memory, loop bounds. We deliver an internal audit report and remediate all findings before recommending an external audit.
04
Week 6–8Testnet Deployment & Integration
Full testnet deployment with Etherscan/Polygonscan source verification. Frontend integration via ethers.js or wagmi, real-time events via The Graph. End-to-end user testing on testnet before any mainnet commitment.
05
Week 8+Mainnet Launch & Post-Deploy Monitoring
Mainnet deployment with multi-sig or timelock governance, contract verification, and on-chain monitoring setup. 30 days of direct engineer access post-launch included — we're on-call if anything anomalous happens.
What's Included
Every contract engagement includes
No bolt-ons. No surprise invoices. Every item below ships with every engagement — baseline.
manifest.log
● ACTIVE10 ITEMS
Source Code3 items
Full Solidity or Rust source codeINCLUDED
Hardhat / Foundry test suite (95%+ coverage)INCLUDED
ABI + NatSpec integration documentationINCLUDED
Security3 items
Internal security review reportINCLUDED
Gas optimization report with before/after benchmarksINCLUDED
Third-party audit coordination (if required)INCLUDED
Deployment3 items
Deployment scripts (testnet + mainnet)INCLUDED
Etherscan / Polygonscan source verificationINCLUDED
Post-deploy monitoring setupINCLUDED
Support1 item
30 days engineer access post-launchINCLUDED
MANIFEST COMPLETE · 10/10 ITEMS
Zero extrasDeliverables
10
items
every engagement
100% included in base scope
Zero hidden fees
Fixed scope, fixed price
Baseline, not a premium tier
No upgrades required
Free 30-min scoping call
Before any commitment
No commitment. Honest scope in the first call.
How We CompareEthersofts vs Freelancers
Ethersofts vs Freelancers
vs Generic Dev Shops
Security-first smart contract development isn't the standard. Here's what you actually get when you compare.
Freelancer
Ethersofts
Dev Shop
OpenZeppelin security patterns
Slither / Mythril static analysis
95%+ unit test coverage
Gas profiling on every function
Internal pre-audit security report
Fuzz / invariant testing
Post-deploy monitoring setup
Honest audit scope assessment
Industries
Sectors we serve
Domain knowledge built across real production projects — fewer unknowns, faster results.
DeFi
Gaming
Supply Chain
Real Estate
Healthcare
Finance
Identity
FAQ
Questions we get all the time
If yours is not here, reach out. We respond within 24 hours with a real answer from an engineer — not a sales pitch.
Contracts that hold or move user funds — yes, always. The cost of a professional audit ($5K–50K depending on complexity) is trivially small compared to the potential loss of TVL. Contracts with no financial risk — simple data storage, low-value NFTs, off-chain-only logic — can use internal review only. We'll give you an honest, project-specific assessment in the first meeting.
Solidity for Ethereum, Polygon, Arbitrum, Base, BSC, Avalanche, and all EVM-compatible chains. Rust for Solana (via Anchor). The vast majority of DeFi, NFTs, and token projects live on EVM chains — Solidity is the answer for those. Solana-native applications with high-throughput requirements use our Rust/Anchor stack.
Only if designed for it upfront. Proxy patterns — UUPS or Transparent Proxy — allow upgrading logic while preserving contract address and state. Immutable contracts offer stronger trustlessness guarantees and a smaller attack surface. The right choice depends on your decentralization philosophy and governance model. We'll design the right pattern and document the admin surface clearly.
Ethereum mainnet, Polygon, Arbitrum, Optimism, Base, BNB Chain, Avalanche, and Solana. We can deploy to any EVM-compatible chain. For most new projects, L2s — Arbitrum, Base, Optimism — are our recommendation: same Ethereum security model, 10–100x lower gas costs, and growing ecosystem reach.
A single contract with standard functionality — 2 to 4 weeks. A full DeFi protocol, token + vesting + governance system, or NFT marketplace smart contract suite — 6 to 12 weeks. The audit and remediation phase adds 2 to 4 weeks for complex protocols. We give you a week-by-week delivery plan in the first call.
A standard ERC-20 or ERC-721 contract with tests and verification typically runs $8K–$20K. More complex DeFi, staking, or governance contracts land in the $25K–$75K range, plus the external audit fee ($5K–$50K) when funds are at stake. We quote fixed scope after mapping your spec and attack surface — no open-ended hourly billing.
We pack storage variables into shared slots, prefer calldata over memory, cache repeated storage reads, use unchecked math where overflow is impossible, and replace unbounded loops with mappings or batched operations. Every public function is gas-profiled with Hardhat or Foundry before mainnet. Typical result is 2–5x cheaper transactions versus unoptimized code, with a before/after benchmark report included.
Yes — you receive the full Solidity or Rust source, the Hardhat/Foundry test suite, ABI and NatSpec documentation, deployment scripts, and the internal security report outright. There is no licensing fee or vendor lock-in. You hold the deployer keys and can independently redeploy, upgrade, or hand the codebase to any other team.
“We needed smart contract work done right — no shortcuts. Their blockchain team audited, optimized, and deployed our DeFi protocol with zero post-launch issues.”
AC
Alex Chen
Founder · Meridian DeFi · Singapore
Ready to BuildLet's build your smart contract
Let's build your smart contract
the right way
Start with a free 30-minute spec call — we'll map the contract architecture, identify the attack surface, and give you an honest scope estimate.
Free consultation24-hour responseNDA on request
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