Smart Contracts and Token Launches
Solidity 0.8.x for Ethereum and EVM L2s (Base, Arbitrum, Optimism, Polygon). ERC-20, ERC-721, ERC-1155, ERC-4626 vault, custom logic. Foundry test suite, 95 percent line coverage, audit-ready before mainnet.
Solidity · Hyperledger Fabric · EVM L2s · Audited Contracts
Blockchain Development Company for Web3 and DeFi Applications
Senior blockchain development since 2018. Solidity smart contracts for Ethereum and EVM L2s, Hyperledger Fabric and Besu for enterprise chains, Web3 front ends on Wagmi and Viem, token launches with audit trail, DeFi and NFT platforms. Code that ships only after a third-party audit and a complete test suite.
4.9 / 5from 2,495 reviews
ISO 9001 Certified
40+
Smart Contracts in Production
8+ yrs
Building on Chain Since 2018
EVM + HL
Public and Enterprise Chains
100%
Contracts Audited Before Mainnet
Your Trusted Blockchain Partner
Blockchain Development for Smart Contracts, Web3, and Enterprise Networks
Solidity on EVM, Hyperledger Fabric for Permissioned, Audited Before Mainnet
Work with senior blockchain developers who have shipped smart contracts and enterprise chains to production for over eight years. From Solidity tokens, NFT marketplaces, and DeFi vaults on Ethereum and EVM L2s to Hyperledger Fabric consortium networks for supply chain and trade finance, we deliver contracts that pass third-party audits and chain integrations that meet financial-grade SLAs.
Clients Across Web3 and FinTech
Which companies trust us with blockchain development?
Selection of clients we have developed for across blockchain-adjacent and Web3 use cases
How Much Does Blockchain Development Cost?
Transparent USD Rate Bands, Audit Cost Itemised Separately
Blockchain development typically ranges from $25,000 for an audited ERC-20 or ERC-721 token with a basic dApp, up to $200,000 for a full DeFi or NFT platform with vaults, indexer, and Web3 UI. Hyperledger Fabric consortium networks for supply chain or trade finance, with 3 or more orgs and a chaincode suite, start at $120,000. Dedicated senior blockchain developer rates from $30 per hour or $3,200 per month. Third-party audit (OpenZeppelin, Trail of Bits, CertiK) is scoped and quoted separately. Decipher Zone replies to your brief within 1 business day and sends a fixed-price proposal in 5 business days.
Token + dApp MVP
$25K+
ERC-20 or ERC-721, audited, basic dApp
DeFi or NFT platform
$60K to $200K
Vaults, marketplace, indexer, Web3 UI
Enterprise Fabric net
$120K+
Hyperledger consortium, 3+ orgs
Dedicated developer
$3,200/mo+
Senior, monthly rolling
What We Build
What can we build with blockchain?
From audited token contracts and DeFi vaults to Hyperledger Fabric consortium networks. Same senior team, same review bar, same audit discipline.
DeFi Protocols and Vaults
Yield vaults, staking, lending, AMM, DEX aggregators. Reentrancy-safe by design, oracle integration via Chainlink, time-weighted access controls, emergency pause patterns, formal upgrade path.
NFT Marketplaces and Drops
Lazy-mint storefronts, royalty enforcement (EIP-2981), auction and Dutch-auction patterns, IPFS or Arweave metadata pinning, Wagmi-based mint flows, Stripe on-ramp for fiat buyers.
Enterprise Chains (Hyperledger Fabric, Besu)
Permissioned networks for supply chain, trade finance, KYC, document provenance. Channels, chaincode in Go or TypeScript, ordering service tuning, identity through Fabric CA or external IDPs.
Web3 Front Ends and Indexers
Next.js front ends with Wagmi, Viem, RainbowKit. The Graph subgraphs for indexed queries, Ponder for custom indexing, WalletConnect v2, gas estimation and meta-transactions where they matter.
Audits, Reviews, and Hardening
Internal review against ConsenSys Smart Contract Best Practices and SWC Registry, Slither and Mythril static analysis, fuzz tests with Foundry. We coordinate the external audit and remediation pass.
Reference Stack
Which technology stack do we use for blockchain development?
Six layers we wire together on greenfield blockchain projects. Each layer is testable, documented, and reviewed against published security guidance.
Layer 01
Smart Contracts
Solidity 0.8.x, Foundry
Solidity with custom errors, immutable patterns, OpenZeppelin libraries, Foundry for testing, deployment scripts, gas snapshots
Layer 02
EVM Networks
Ethereum, Base, Arbitrum, Polygon
Mainnet and L2 deployments, network-aware configs, verified source on Etherscan, multi-chain factories where useful
Layer 03
Enterprise Chain
Hyperledger Fabric, Besu
Permissioned networks, chaincode in Go or TypeScript, channel design, ordering service (Raft), Fabric CA identity, private data collections
Layer 04
Web3 Front End
Next.js, Wagmi, Viem, RainbowKit
Type-safe contract reads and writes through Viem, multi-wallet connect via RainbowKit, EIP-712 typed signatures, transaction lifecycle UI
Layer 05
Indexing
The Graph, Ponder, Goldsky
Subgraphs for event indexing, Ponder for custom TypeScript indexers, Goldsky pipelines for high-throughput data feeds to product UIs
Layer 06
Security + Audit
Slither, Mythril, OpenZeppelin
Slither and Mythril in CI, fuzzing with Foundry, internal review against SWC Registry, coordinated external audit before mainnet
Delivery Process
How does our blockchain development process work?
Predictable cadence with an explicit audit window before any mainnet deploy. No shortcuts on security review.
- 01Day 0 to 5
Architecture Review
Free architecture review. Threat model for your contract, gas-cost estimate, chain selection (mainnet vs L2 vs Fabric). Written proposal with milestones in 5 business days.
- 02Day 6 to 10
SOW, NDA, Repo Access
Mutual NDA before any code. SOW with rate band and audit window. Your repo provisioned. Senior developers onboarded to your sprint cadence.
- 03Sprint 0
Scaffold and CI
Foundry or Hyperledger scaffold, Slither and Mythril in CI on every push, deployment scripts behind a multisig, formal coverage targets agreed up front.
- 04Every Sprint
Two-Week Sprints
Two-week sprints with public board. Weekly demos on testnet (Sepolia, Base Sepolia) or a private Fabric network. Code review on every PR, fuzzing on every merge.
- 05Audit Window
External Audit
External audit by an independent firm (OpenZeppelin, Trail of Bits, CertiK). We coordinate scope, fix findings, publish the report, then deploy to mainnet behind multisig.
- 06Post-Launch
Monitoring and Upgrades
OpenZeppelin Defender for monitoring, Tenderly for transaction tracing, planned upgrade path through proxy patterns or Diamond standard, incident runbook documented.
7-day No-Risk Trial
The first week is on us
On dedicated engagements, the first week is on us. Walk away free if the fit is wrong.
Engagement Models
What engagement models do you offer for blockchain development?
Transparent USD rate bands, rolling monthly cancel, third-party audit cost itemised separately.
Hourly
Pay only for hours used
$30/hour
Tracked weekly, billed monthly
- Code reviews and pre-audit
- Solidity bug fixes
- Web3 UI work
- No minimum commitment
- Mutual NDA before brief
Most Popular Dedicated
Senior blockchain developer, full-time on your team
$3,200/month
Monthly rolling, cancel anytime
- One developer, only you
- Embedded in your sprint
- Reports to your stakeholders
- 7-day no-risk trial
- 48-hour replacement guarantee
Audit Prep
Pre-audit hardening sprint
$8,000+ sprint
Per 2-week sprint
- Slither and Mythril clean run
- Foundry fuzz suite
- Internal SWC checklist
- Audit-ready PR with notes
- Coordination with auditor
Fixed Scope
Locked deliverables and timeline
$25,000+ project
Per-milestone payments
- Best for token launches
- Locked scope upfront
- Locked timeline
- Audit cost itemised
- No surprise change orders
Anonymised Builds
What have we built with blockchain?
Four anonymised engagements across DeFi, NFT, enterprise consortium, and token launches. Client names are protected by NDA. Reference clients available on request after a mutual NDA.
- 01Base + Arbitrum
BC-01
DeFi · Yield vault
ERC-4626 yield vault with strategy adapter pattern, Chainlink price feeds, time-weighted withdrawal queue. Audited by an independent firm before mainnet, deployed across two L2s behind a multisig.
- Lines (Sol)
- 1.8K
- Coverage
- 97%
- Audit issues
- 0 critical
- 02Ethereum + Polygon
BC-02
NFT · Drops + marketplace
Lazy-mint marketplace with EIP-2981 royalties, Dutch-auction drops, IPFS metadata pinning through Pinata, Wagmi mint flow with Stripe fiat on-ramp, The Graph subgraph for collection indexing.
- Collections
- live
- Mints handled
- 20K+
- Gas / mint
- tuned
- 03Hyperledger Fabric
BC-03
Enterprise · Trade finance consortium
Permissioned Fabric network for a multi-bank trade finance consortium. Chaincode in TypeScript, channel per bilateral relationship, private data collections for confidential terms, Fabric CA identity.
- Member orgs
- 5
- Channels
- 12
- Throughput
- 200 tps
- 04Ethereum mainnet
BC-04
Token · ERC-20 launch + staking
Audited ERC-20 token contract with vesting schedules, staking contract with per-block rewards, governance contract migration ready. Multisig-controlled treasury, OpenZeppelin Defender for ops.
- Holders
- post-launch
- Staked
- tracked
- Audit issues
- 0 critical
Want references for a specific use case?
Send a brief with your chain, contract type, and budget range. After a mutual NDA we share named references and contract addresses on the public explorer.
Request referencesFrequently Asked
Blockchain Questions Founders and CTOs Actually Ask
Rate bands, chain choice, audits, DeFi, NFT, enterprise Fabric, answered up front.
What does blockchain development cost?
An audited ERC-20 or ERC-721 token with a basic dApp starts at $25,000. Full DeFi or NFT platforms with vaults, indexer, and Web3 UI run $60,000 to $200,000. Hyperledger Fabric consortium networks with 3 or more orgs start at $120,000. Dedicated senior blockchain developer rates from $30 per hour or $3,200 per month. Third-party audits are scoped and quoted separately.
Which blockchain networks do you build on?
Ethereum mainnet and EVM L2s (Base, Arbitrum, Optimism, Polygon, zkSync) for public Web3. Hyperledger Fabric and Hyperledger Besu for permissioned enterprise networks. We do not chase every new chain. We pick networks based on tooling maturity and your user base.
Do you handle external smart contract audits?
We coordinate the audit, we do not perform the audit. Independent firms (OpenZeppelin, Trail of Bits, CertiK, Spearbit) audit every contract before mainnet. We scope the engagement, run internal Slither and Mythril passes, prepare audit notes, and remediate findings in a dedicated sprint.
Can you build a DeFi protocol or vault?
Yes. ERC-4626 vaults, staking, lending, AMMs, DEX aggregators. Reentrancy-safe by design, oracle integration via Chainlink, time-weighted access controls, emergency pause patterns, formal upgrade path through proxy patterns or the Diamond standard.
Do you build NFT marketplaces and drops?
Yes. Lazy-mint storefronts, royalty enforcement (EIP-2981), Dutch-auction patterns, IPFS or Arweave metadata pinning, Wagmi-based mint flows, Stripe fiat on-ramp, The Graph subgraph for collection indexing.
Do you support enterprise chains like Hyperledger Fabric?
Yes. Permissioned Fabric networks for supply chain, trade finance, KYC, and document provenance. Channel design, chaincode in Go or TypeScript, ordering service tuning (Raft), Fabric CA identity, private data collections for confidential terms.
How fast can you start a blockchain project?
Senior blockchain developer replies within 24 hours of your brief. Free architecture review and written proposal in 5 business days. SOW signed by day 10. First commit within 2 weeks. Audit window scheduled before mainnet.
Why hire Decipher Zone for blockchain?
Eight years shipping smart contracts and enterprise chains. 40+ contracts in production. Hard policy: every contract audited externally before mainnet. ISO 9001 certified. Source code in your repository from day one. 7-day no-risk trial on dedicated engagements.
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Free Architecture Review · Reply in 1 Business Day
Ready to Ship Smart Contracts That Pass Audit?
Send a brief with your chain, contract type, and budget range. A senior blockchain developer reads it personally and replies within one business day with a free architecture review. No sales call, no pitch deck.
- Reply within 1 business day
- External audit before mainnet
- Mutual NDA before brief