On-chain engineering
Build smart contracts for your token, DeFi protocol or on-chain product.
Our implementation scope separates engineering, security review and launch responsibilities. Plan blockchain solutions around the rules your users need to verify, with a clear handoff before mainnet.
Send your project brief. We will clarify the scope and next steps by email.
Compare these product requirements with your intended on-chain flows. GridTradeX demonstrates game logic. PumpTap and Ludo show supporting wallet and data infrastructure. The surrounding application connects smart contracts to wallets, interfaces and off-chain services. Confirm how integration of blockchain data and external services affects the implementation scope.
PumpTap worked with Pharos Production on a multi-chain wallet for storing, sending and managing digital assets. Its event-driven infrastructure supports transaction tracking and connections to decentralized applications. For smart contracts accessed through a wallet, scope transaction submission, status updates and user-facing failures separately from the on-chain rules.
Ludo worked with Pharos Production on a cross-chain reputation platform that processes blockchain events and generates soulbound NFT-based reputation scores. Web, browser and Telegram interfaces connect users to reputation data and APIs. This case shows the data infrastructure that can surround smart contracts. The public audit reference below identifies the reviewed NFT minter scope.
Pharos Production partnered with Grid Trade X on a crypto prediction game combining price feeds, betting rounds and smart contracts. The case describes an AWS-based event-driven stack and on-chain transparency. Compare its product flows and integration requirements with the smart contracts you intend to build.
Independent reviews from Clutch, GoodFirms and direct client testimonials - verified feedback on our software projects
Based on 342 verified reviews
Pharos Production Inc. delivered a reliable game that received great reviews from testers and co-promotion partners. The team was highly responsive, flexible with changes, and delivered work on time. Moreover, their impressive quality and fair pricing stood out.
Pharos Production delivered an adaptable digital health platform that enabled us to swiftly introduce new patient services while ensuring robust data security. Their technical skills and forward-thinking attitude gave us the confidence to grow as our user community flourished!
The value of on-chain rules depends on a real need for shared verification. The network can make asset transfers independently verifiable, but placing contracts on a blockchain also introduces fees, wallet requirements and operational constraints.
A traditional contract records obligations in legal language. For an on-chain workflow, identify which contract terms can become executable rules and which still need legal interpretation or human judgment. Code does not resolve those questions for you.
Use this checklist to agree the handoff for smart contracts in your statement of work. Before implementation starts, identify the included deliverables, optional platform work and third-party responsibilities.
Define smart contract logic, actors, asset flows and permissions in the specification and threat model. Document contract functions and interactions with other contracts, including failure scenarios. These decisions guide smart contract creation and give the client a specification to approve.
Specify repository access, dependencies and build instructions. The handoff also requires unit tests and financial invariants that another developer can run from the agreed source version.
Agree the internal review report, external-auditor handoff and remediation responsibilities for the agreed repository. Keep release evidence tied to the version the auditor reviewed.
Include the agreed deployment scripts, addresses, upgrade procedures and admin-key custody for the agreed release. Define the support boundary and the evidence required for the release.
Founder and CTO Pharos Production
13 years in architecture of great software solutions tailored to customer needs for startups and enterprises
23 years of practical enterprise customized software production experience
Lecturer at the National Kyiv Polytechnic University
Doctor of Philosophy in Artificial Intelligence
Master's degree in Computer Science, completed with excellence
Master's degree in Electronics and precision mechanics engineering
Choose a chain your users can work with and a build the client can reproduce.
Match the network to your users, transaction workload and trust assumptions. Compare various blockchain platforms by wallet support, fees and the operational requirements of your release.
On this network, EVM bytecode defines the executable rules. Other networks need their own compatibility and integration checks.
For EVM-based smart contracts, source written in languages such as Solidity compiles to bytecode executed by the Ethereum Virtual Machine. The compiler version belongs in the delivery specification. A developer evaluating programming languages like Solidity should also review the available testing libraries and the team's relevant implementation work.
Agree the development environment before implementation. Record dependency versions and build commands so the client can reproduce the test results. On the selected blockchain network, rehearse user flows before mainnet approval. Experience on one chain does not establish readiness for specific blockchain platforms. When assessing BSC, historically called Binance Smart Chain, confirm the current network configuration and wallet integrations.
Choose the closest starting point for your smart contracts. A simple contract with bounded rules needs a different scope from an interacting suite. The estimate follows a review of the specification, integrations and testing requirements. These options are not fixed-price packages.
| Starting point | Work to scope | Inputs for an estimate | Budget and timing |
|---|---|---|---|
| Token or contract module | A defined token, vesting, escrow or other bounded contract component. | Rules, roles, target chain and integration points. | Quoted after reviewing the specification and testing requirements. |
| Smart contract suite | Interacting smart contracts with shared permissions, tests and deployment dependencies. | Architecture, economic rules, existing code and audit expectations. | Build and review milestones scoped together; auditor scheduling identified separately. |
| DeFi protocol | Financial rules implemented in smart contracts, with protocol-specific risks and integrations. | Economic model, asset flows, oracle assumptions and operational controls. | Contract work separated from frontend, backend and other platform development. |
| Existing-code review and remediation | Review of an existing repository and agreed implementation of fixes. | Repository, deployed version, known findings and intended release. | Review and remediation estimated separately from an independent external audit. |
Confirm external-auditor fees, legal advice, frontend and backend work, oracle or bridge integrations, deployment gas, monitoring and ongoing support in the proposal. Software development services around smart contracts need their own scope. None should be assumed included in a contract-only estimate.
The launch plan covers specification, build, internal review, external-auditor availability, remediation and deployment approval. Changes to economic rules or integrations can change the schedule; a code-complete milestone is not a mainnet-launch date.
Get a project estimateIdentify assets at risk, actors, dependencies and acceptance criteria. Before implementation, agree the economic rules and the assumptions those rules rely on.
Write the smart contract code against the approved specification. Smart contract testing covers normal flows, permission boundaries and financial invariants. Review code changes and retain reproducible results for the handoff.
Separate internal review from the independent audit of smart contracts. Record findings, fixes and accepted limitations against the reviewed source version.
Before deploying a smart contract, confirm the reviewed version, deployment authority and admin-key custody. Agree who can deploy smart contracts and which release evidence the client must approve before mainnet.
Agree who owns the repository and intellectual property, holds deployment and admin keys, approves upgrades and responds to incidents. Specify third-party licenses, monitoring, maintenance and the end of the development engagement in the contract.
Pharos Verified Delivery applied to 110+ production applications since 2013
Set project-specific acceptance criteria for smart contract security. A checklist or coverage percentage alone does not establish that smart contracts are safe. Connect each criterion below to a named source version and repeatable evidence.
Test rounding across a sequence of operations, including partial withdrawals and boundary values. A single correct transaction can still leave a discrepancy when values are repeatedly divided and accumulated. Define a conservation invariant and reconciliation procedure for the complete asset flow.
Recognized on Clutch, GoodFirms and The Manifest for software engineering excellence
65+ industry awards
The engineering practice is led by Dmytro Nasyrov, Founder and CTO. See our editorial policy for how sources and review responsibilities are described.
Ask each provider for work relevant to your asset flows and integrations. The engineer should explain permissions, failure scenarios and the evidence behind release decisions.
Evaluate the development team through its specification, tests and handoff artifacts. Blockchain developers can demonstrate a deep understanding of blockchain constraints by explaining dependency failures and recovery limits. Ask how those decisions affect the contract suite in your scope.
Type to filter questions and answers. Use Topic to narrow the list.
Showing all 8
No matches
Try a different keyword, change the topic or clear filters
The estimate depends on the contract scope, economic rules, integrations and testing requirements. The scope matrix above separates a bounded module, a suite, a protocol and existing-code work.
Request a proposal that identifies external costs and optional platform work.
Internal security review and an independent external audit are separate. Confirm who selects and pays the auditor, prepares the handoff, implements fixes and approves the reviewed release.
Development work or coordination alone does not constitute an independent audit.
Specification changes, integration dependencies, auditor availability, remediation and client deployment approval affect launch timing. The proposal should distinguish build milestones from the complete path to mainnet.
Existing-code review and remediation are separate engagement options. Share the repository, deployed version and known findings so the scope can distinguish diagnosis, fixes and any further independent review.
Start with the users, wallet ecosystem, transaction workload, integrations and trust assumptions. During scoping, compare the intended chain with these requirements and ask for examples of the team's relevant implementation work.
Repository and intellectual-property terms, deployment authority and admin-key custody must be explicit in the agreement. Upgrade permissions, approvals and any timelock or multisig requirements belong in the operational runbook.
Monitoring, maintenance, emergency response and further audit work need their own scope and responsibilities. Agree the support period, escalation path and change process before launch.
Pharos provides engineering services. Token classification and other legal requirements need qualified counsel.
Legal advice, jurisdiction-specific approval and regulatory guarantees are outside this development service.
Share the intended behavior of your smart contracts, target chain, existing repository and launch constraints. Request an NDA before sharing confidential material.
Contact us today to discuss your project. We're ready to review your request promptly and guide you on the best next steps for collaboration
Same dayWe're committed to keeping your information confidential, so we'll sign a Non-Disclosure Agreement
1 dayAfter we chat about your goals and needs, we'll craft a comprehensive proposal detailing the project scope, team, timeline and budget
3-5 daysLet's connect on Google Meet to go through the proposal and confirm all the details together!
1-2 daysAs soon as the contract is signed, our dedicated team will jump into action on your project!
Same dayWe will contact you about scope and next steps.
