Solidity smart contract developer — hire senior engineers from Vasilkoff

If you need a Solidity smart contract developer for a production product, you are not buying code only. You are buying risk control for immutable logic that can hold real money and real user trust.

Vasilkoff provides Solidity development services with senior engineers who write, test, audit, and deploy contracts end to end. We support startup MVPs, token launches, DeFi protocols, NFT products, RWA tokenization systems, and custom smart contract automation for existing businesses.

Why teams hire us

• 12+ years in blockchain and software delivery
• ERC-20, ERC-721, ERC-1155, and ERC-1400 experience
• Lifetime free bug fixing on contracts we ship
• AI-accelerated delivery with senior human review
• Practical communication and deployment ownership

If you are still comparing options, our detailed article on how to hire a Solidity smart contract developer explains evaluation criteria and red flags.

Solidity development services we provide

When clients search for a Solidity developer for hire, they usually have one specific deliverable in mind. We cover the full practical scope:

• ERC-20 token development for utility and DeFi assets
• ERC-721 and ERC-1155 NFT contracts
• DeFi smart contract development (lending, staking, yield systems, DEX components)
• RWA tokenization contracts and permissioned issuance logic
• ERC-4626 and ERC-7540 vault-standard contract implementation
• DAO governance contracts and voting logic
• Token vesting and distribution contracts
• Multi-signature wallet contract logic
• Cross-chain bridge integration contracts
• Smart contract audit and security review
• Gas optimisation for existing contracts
• Upgradeable smart contracts with proxy patterns
• Custom business logic automation on EVM chains

Need adjacent full-stack support after contract delivery? We also provide full stack DApps development, including frontend, indexing, and wallet UX.

EVM smart contract development on supported blockchains (2026)

Chain support should never be vague. In 2026 we prioritize chains by actual TVL and deployment momentum:

Tier 1: always included

• Ethereum mainnet for highest liquidity depth and audited-contract maturity
• Base as the strongest current L2 growth story and major revenue capture
• Arbitrum for deep DeFi ecosystems and advanced execution options

Tier 2: strong production demand

• BNB Smart Chain for large retail distribution
• Polygon for broad enterprise integration patterns
• Optimism / OP Stack for Superchain-aligned deployments
• Mantle for rapidly growing DeFi and RWA-oriented activity

Tier 3: emerging but strategic

• Berachain for Proof-of-Liquidity-aligned DeFi products
• Plume for RWA-native EVM use cases
• ERC-4626 / ERC-7540 vault ecosystem deployments where chain and protocol selection depends on product design

Working chain set shown on this page: Ethereum · Base · Arbitrum · BNB Smart Chain · Polygon · Optimism · Mantle · Berachain · Plume · any EVM-compatible chain

If your roadmap is chain-agnostic, we can design contracts and deployment scripts so migration across EVM environments is predictable and low-friction.

2026 specialization: RWA tokenization and vault standards

Tokenized real-world assets are one of the fastest-growing contract categories in 2026. That shift is moving client demand from generic token launches toward production-grade financial primitives.

Our specialization for this vertical includes:

• Permissioned token models for institutional workflows
• Vault logic with ERC-4626 and ERC-7540 standards
• Treasury and collateral management contract layers
• Compliance-aware access controls and role governance
• Upgrade-safe contract architecture for long-lived financial products

If your roadmap involves financial institutions, real estate tokenization, or treasury yield products, we structure delivery around operational safety first and scale second.

How we work: 5-step Solidity delivery process

A senior Solidity smart contract developer should be judged by process, not just syntax knowledge. Our delivery workflow:

1. Requirements analysis
   We define contract logic, permission model, token economics, upgrade requirements, and failure scenarios before coding.

2. Architecture design
   We choose storage layout, event schema, proxy strategy (if needed), and gas optimisation approach aligned to your usage pattern.

3. Development and unit testing
   Implementation happens in Hardhat or Foundry with strict review and practical function-level test coverage before release candidates.

4. Security review and audit prep
   We run static analysis and manual checks for reentrancy, access-control flaws, arithmetic issues, unsafe external calls, and upgrade risks.

5. Deployment and verification
   We deploy to target chain, verify source, provide runbooks, and set up post-deployment monitoring expectations.

This process is what separates "code that compiles" from contracts that are ready for production traffic.

Smart contract security practices

Security is the core decision factor when hiring a smart contract development company. Our baseline practices include:

• Automated static analysis using Slither and MythX-style workflows
• Manual review against OWASP smart contract risk patterns
• OpenZeppelin contracts for battle-tested foundations where applicable
• Proxy upgrade pattern support (UUPS or Transparent) when upgradability is required
• Emergency pause functionality on token and DeFi-critical flows
• Role-based access control and principle-of-least-privilege defaults
• Lifetime free bug-fix guarantee for all contracts we build

That last point matters: immutable systems make bugs expensive, so our bug-fix policy is designed to reduce your post-launch risk.

Solidity stack and tooling

Buyers who know Solidity usually want to see concrete tooling, not generic claims.

• Languages: Solidity (primary), Vyper (on request)
• Frameworks: Hardhat, Foundry
• Libraries: OpenZeppelin Contracts, OpenZeppelin Upgrades
• Oracles: Chainlink (price feeds, VRF, CCIP)
• Testing: Waffle, Chai, Forge
• Auditing: Slither, MythX workflow, manual review
• Indexing: The Graph (subgraph support)
• Wallet integrations: MetaMask, WalletConnect, Safe (Gnosis)

Portfolio snapshots

Below are representative engagements (anonymized where needed) to show delivery patterns:

DeFi staking protocol

• Chain: Polygon
• Standard: ERC-20 with vesting
• What we built: staking and reward-distribution contracts with role controls and emergency pause, plus deployment scripts and operational runbook.
• Result: deployed in Q3 2024 with stable launch operations and no critical post-launch contract incidents.

Tokenised rewards platform

• Chain: Ethereum
• Standard: ERC-20 + custom reward logic
• What we built: mint/burn controls, vesting schedules, treasury permissions, and admin tooling integration.
• Result: reduced manual reward processing and improved distribution transparency for end users.

NFT membership product

• Chain: BNB Smart Chain
• Standard: ERC-721
• What we built: membership NFT issuance contracts, whitelist flow, metadata controls, and transfer restriction options.
• Result: production launch with predictable mint flow and clear on-chain ownership model.

If you want broader architecture options beyond pure Solidity scope, see our parent service: Smart Contracts Development.

Frequently asked questions

How much does Solidity smart contract development cost?
Simple contracts such as ERC-20 tokens with basic logic can start around $2,000 to $5,000. Production DeFi protocols with security review and audit preparation are usually in the $15,000 to $50,000+ range. We provide fixed-price quotes after a free requirements call.

How long does smart contract development take?
Simple contracts usually take 1 to 2 weeks. More complex DeFi, NFT, or governance systems often take 4 to 10 weeks including testing and audit cycles.

Do you audit smart contracts written by other developers?
Yes. We review third-party Solidity code for vulnerabilities, gas inefficiencies, upgrade risks, and architecture issues before release.

What blockchains do your Solidity developers support?
Our primary 2026 stack is Ethereum, Base, Arbitrum, BNB Smart Chain, Polygon, and Optimism, plus Mantle, Berachain, and Plume for specific growth use cases. We can deploy to any EVM-compatible chain.

What is your smart contract bug-fix policy?
We provide lifetime free bug fixing for contracts we build. If a bug exists in code we delivered, we fix it at no extra cost.

Hire a Solidity developer with production ownership

If you need an Ethereum smart contract developer who can ship securely and stay accountable after launch, we can help. Contact us with your chain, feature scope, and target timeline, and we will respond with a practical implementation plan.

Start here: Contact Vasilkoff