We build smart contracts, dApps, and Web3 integrations on Ethereum and compatible chains. Secure, auditable, and production-ready blockchain solutions.
ZTABS Blockchain Development: We build smart contracts, dApps, and Web3 integrations on Ethereum and compatible chains. Secure, auditable, and product 300+ clients, 500+ projects. Houston, TX.
ZTABS provides blockchain development — We build smart contracts, dApps, and Web3 integrations on Ethereum and compatible chains. Secure, auditable, and production-ready blockchain solutions. Our capabilities include smart contract development, dapp development, token & nft solutions, and more.
30+ smart contract and Web3 systems shipped on Ethereum, Polygon, and Solana — every contract ships with full Slither/Mythril audit reports plus written testnet rehearsal data before mainnet deploy.
Blockchain technology enables trustless transactions, transparent record-keeping, and programmable assets — but building production-grade blockchain applications requires deep expertise in cryptography, gas optimization, and smart contract security. ZTABS develops blockchain solutions on Ethereum, Polygon, Solana, and EVM-compatible chains. We write smart contracts in Solidity and Rust, build decentralized applications (dApps) with React and ethers.js/wagmi, and integrate Web3 capabilities into existing web and mobile applications.
Our smart contract development follows security-first practices: formal verification, comprehensive unit testing with Hardhat and Foundry, and third-party audit preparation. We have built token contracts (ERC-20, ERC-721, ERC-1155), DeFi protocols (staking, liquidity pools, yield aggregators), NFT marketplaces, DAOs with on-chain governance, and supply chain tracking systems. For enterprises exploring blockchain, we offer proof-of-concept engagements that validate technical feasibility and business value before full development.
We also build hybrid architectures that combine on-chain settlement with off-chain computation for cost efficiency. Smart contract projects start at $20K for standard token or NFT contracts, while full dApp development ranges from $50K-$200K depending on protocol complexity and chain requirements.
Core capabilities we deliver as part of our blockchain development.
Solidity smart contracts for tokens, DeFi, NFTs, and custom on-chain logic.
Decentralized apps with wallet integration and on-chain interactions.
ERC-20, ERC-721, ERC-1155, and custom token standards for your use case.
Connect existing apps to blockchain via Ethers.js, Web3.js, and wallet providers.
Smart contract reviews, best practices, and gas optimization.
Deploy to Ethereum, Polygon, Arbitrum, Base, and other EVM-compatible chains from a single codebase.
Our team picks the right tools for each project — not trends.
Node.js empowers businesses to build scalable applications with unparalleled speed and efficiency. By leveraging its non-blocking architecture, organizations can deliver seamless user experiences and accelerate time-to-market, driving innovation and growth.
Harness the power of React to accelerate your development process, enhance user experiences, and drive ROI. With its component-based architecture, React allows businesses to build dynamic applications that are both scalable and maintainable, ensuring long-term success in a competitive landscape.
TypeScript is a typed superset of JavaScript that adds static type checking and enhanced tooling. Catch errors at compile time, improve code maintainability, and accelerate development with world-class IDE support.
Next.js transforms web applications into high-performance, SEO-friendly platforms that drive user engagement and boost conversion rates. Leverage its capabilities to streamline your development process and accelerate time-to-market, ensuring your business stays ahead of the competition.
Leverage the power of Python to streamline operations, reduce costs, and drive innovation. Our Python solutions enable businesses to enhance productivity and deliver results faster than ever.
Every blockchain development project follows a proven delivery process with clear milestones.
Define use case, chain selection, and technical requirements for your Web3 project.
Design contract architecture, token economics, and upgrade paths.
Implement and test contracts, then build or integrate frontend dApps.
Security review, mainnet testing, and gas optimization before deployment.
Deploy to testnet for stakeholder review, integration testing, and community feedback.
Deploy to mainnet or L2, configure monitoring, and provide ongoing support and upgrades.
What sets us apart for blockchain development.
Smart contracts are immutable. We prioritize security, audits, and best practices from the start.
Contract development plus dApp UIs, wallet integration, and off-chain infrastructure.
Efficient contract design to minimize deployment and transaction costs.
Production deployments on Ethereum, Polygon, Solana, and L2s. We choose the right chain for your use case and budget.
Comprehensive test suites with Hardhat and Foundry, formal verification prep, and third-party audit coordination.
Blockchain where it adds value; traditional backends where it doesn’t — pragmatic Web3.
Projects typically start from $10,000 for MVPs and range to $250,000+ for enterprise platforms. Every engagement begins with a free consultation to scope your requirements and provide a detailed estimate.
Across our portfolio, we track delivery patterns to improve outcomes. Our internal data from 2023-2026 shows:
| Alternative | Best For | Cost Signal | Biggest Gotcha |
|---|---|---|---|
| Tier-1 Web3 agency (Consensys, OpenZeppelin, Nethermind) | DeFi protocols, DAOs, and token launches with >$10M TVL targets requiring brand-signal audits. | $250–$500/hour; $200K–$2M engagements (indicative). | Waitlists run 8–16 weeks. Audits dominate the timeline — a 4-week dev build becomes a 12-week project when the audit slot lines up. |
| Boutique Web3 agency (ZTABS tier) | Mid-market Web3 startups needing a production-ready smart contract + dApp in 8–14 weeks with a third-party audit routed in. | $120–$220/hour; $40K–$200K per engagement (indicative). | We require a 2-week Foundry/Hardhat test suite + invariant testing phase before any audit. Teams that skip this have their audits rejected and lose $40K in budget on rework. |
| Freelancer (Gitcoin, CryptoJobs) | A single custom contract, a subgraph, or front-end integration under $8K. | $40–$180/hour (indicative). | Smart contract bugs are unfixable post-deploy (unless you build upgradeability in advance). Solo devs without audit culture ship code with reentrancy or oracle-manipulation surfaces — costly lessons after a $2M TVL draining event. |
| No-code Web3 tools (thirdweb, Tatum, Alchemy) | NFT drops, simple ERC-20s, and prototypes where standard OZ contracts + a pre-built UI are enough. | Free–$300/month platform + gas (indicative). | Scales to a point — any custom logic (dynamic royalties, non-standard access control, cross-chain) requires dropping back to Solidity. Export paths exist but the deployed contract is already live; you can't refactor a mainnet contract. |
| In-house Solidity engineer | Protocols with 3+ contracts in active development and enough TVL ($5M+) to justify a full-time security mindset. | $220K–$450K/year loaded (US senior); $120K–$250K remote EU/LatAm (indicative). | Senior Solidity devs are scarcer than ML engineers — typical 6–9 month hiring cycle. Solo Solidity hires without a peer reviewer produce audit findings no one internally can triage. |
Traditional web backend vs. smart contract for a multi-party agreement. A Postgres-backed multi-party agreement system (loans, escrow) costs $60K–$120K and runs at ~$300/month infra. A comparable smart contract on Arbitrum costs $90K–$180K to build + audit at $40K–$100K + ~$0.10–$0.50 gas/txn. Traditional wins for internal or trust-already-present use cases. Smart contract wins when: (a) counterparty trust is low/unknown, (b) settlement must be final and censorship-resistant, or (c) composability with other protocols matters. Break-even: if you can't answer 'what if the database admin cheats' with 'doesn't matter,' stick with traditional — you don't need blockchain. L1 Ethereum vs. L2 (Arbitrum, Optimism, Base). A single on-chain mint on Ethereum mainnet costs $5–$60 in gas (wildly variable). Same mint on an L2 costs $0.01–$0.30. For a mint of 10,000 NFTs at average $15 L1 gas = $150K in gas cost vs. $2K on L2. Break-even: any launch with >50 transactions should use an L2 for economics alone. Mainnet only makes sense for value-anchored assets (>$5K per txn) where L2 withdrawal delays matter. dApp frontend: custom Next.js vs. thirdweb SDK. thirdweb's pre-built dashboard + SDK costs $0–$249/month and delivers a minting UI in hours. A custom Next.js + wagmi/viem frontend runs $15K–$40K but owns the brand, analytics, and doesn't share revenue. Break-even: ~$50K in cumulative platform fees over 18 months (roughly $200K/year mint volume at thirdweb's 0.5% cut) makes custom cheaper AND keeps the user relationship.
A staking contract called msg.sender.call{value: x} before updating internal balance state; attacker re-entered withdraw and drained the pool. Fix: Checks-Effects-Interactions pattern (update state BEFORE external calls), OR use OpenZeppelin's ReentrancyGuard. Always invariant-test that balance decreases match transfers.
A lending protocol priced collateral via a single Uniswap V2 pool; a flash-loan attacker pumped the pool price, borrowed against inflated collateral, then dumped — drained $8M in 12 seconds. Fix: never use a single spot-price oracle. Use Chainlink feeds with deviation thresholds, OR Uniswap V3 TWAPs over 30+ minute windows, plus circuit breakers on abnormal price changes.
A dev replaced require(x > 0, 'msg') with assembly { if iszero(x) { revert(0,0) } } for gas savings — audit flagged it as 'arbitrary revert with no error data' and the upgrade was blocked 3 weeks. Fix: use custom errors (error InvalidInput) — same gas savings as assembly, still auditor-friendly. Never hand-roll assembly without auditor pre-approval.
A team added a new state variable at the top of the implementation contract instead of the end; upgrade went through and every user's balance shifted by one slot. $400K locked until a second upgrade corrected storage layout. Fix: use OpenZeppelin's @openzeppelin/hardhat-upgrades with storage-gap patterns, NEVER insert state vars mid-contract. Run hardhat-storage-layout diffs on every PR.
A dApp worked on mainnet, but user was connected to Optimism; wagmi auto-signed and broadcast the transaction to Optimism where the contract didn't exist — funds went to a precompile address, unrecoverable. Fix: always check chain.id against the expected chain BEFORE signing; use useSwitchChain to force a switch, and never rely on the user's wallet being on the right network.
Verified reviews from real client engagements — sourced from our public testimonial archive and Clutch profile.
My experience is throughout positive. Communication, service, the short response times and the flawless execution of a challenging topic was absolutely great. ZTABS is definitely my first choice again.
Christian Neff
Bank Software Advisory · Bank Software Advisory
Fintech
Fantastic Agency! I couldn't fault them even if I tried. They always go above and beyond to meet your expectations and always produces quality work. Thank you ZTABS.
Stephanie Kal
CEO · Beauty Finder Australia
Marketplace
It has been great working with ZTABS. They bounce off the ideas along the way. Amazing Experience.
Joel Rowe
CEO · Drill Quoter
Marketplace
We don't just contract — we ship and operate our own software. 17 products in production.
Find answers to common questions about our blockchain development.
We primarily work with Ethereum, Polygon, and other EVM-compatible chains. We can advise on chain selection based on cost, security, and ecosystem.
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End-to-end SaaS development from MVP to scale — multi-tenancy, Stripe billing, role-based access, and cloud-native architecture. We have built and shipped 17 SaaS products of our own, serving 50,000+ users. Next.js, Node.js, PostgreSQL, AWS and Vercel.
Get a free consultation and project estimate for your blockchain development project. No commitment required.
