Smart contracts are the rare category of software where a defect can be permanent and publicly exploitable within minutes of deployment. That changes how the work should be done: specification before code, test coverage as a gate rather than a target, and independent review before any contract holds value. TechEsperto develops and reviews contracts across EVM networks and beyond, with the same engineering discipline whether the contract handles a membership token or a settlement flow. Send us a specification or an existing codebase and we will tell you where the risk sits.
We scope contract work by first establishing what genuinely needs to be on chain, because the smallest correct contract surface is also the cheapest to audit and the least likely to fail. The work below covers what product teams, financial firms, and enterprises most often bring us, whether building new contracts or reviewing an existing codebase.
Fungible and non-fungible token contracts with supply rules, transfer restrictions, and vesting where required, built on well-reviewed base implementations rather than from scratch.
Listing, offer, settlement, and escrow logic with correct handling of failure paths, since most contract defects appear in the branches nobody exercises during testing.
Staking, vesting, lending, and distribution mechanisms, where economic design review matters as much as code correctness because incentive flaws are exploited like bugs.
Voting, proposal execution, treasury control, and timelock mechanisms with attention to who can act, under what delay, and what happens if keys are lost.
Settlement, conditional release, and multi-party agreement logic on permissioned networks, integrated with conventional systems through our API development practice.
Review of contracts written by your team or a previous vendor, producing a severity-rated findings report with remediation guidance and re-review after fixes.
Contract quality comes from process rather than talent alone. The practices below are what separate contracts that pass audit cleanly from those that return long findings lists, and we apply them consistently regardless of how simple a contract appears at specification stage.
Written behavioral specification including failure paths and access control, agreed before code, because most severe findings originate in unclear requirements rather than coding errors.
Unit, integration, and fork testing against realistic conditions, with coverage treated as a release gate rather than a metric reported after the fact.
Property-based testing that searches for inputs breaking stated invariants, which finds classes of defect that example-based tests reliably miss.
Explicit definition of who can call what, which privileges are held by keys, and how those keys are secured, since key compromise is a leading cause of contract loss.
Storage layout, loop behavior, and call patterns profiled and optimized where it matters, without sacrificing readability in ways that make audit harder.
Deliberate decisions on upgradeability, pause mechanisms, and their governance, documented clearly since users and auditors examine these powers closely.
Contract work follows a stricter sequence than conventional software because the cost of a defect is asymmetric. Specification precedes code, testing gates progress, and independent review happens before any deployment holding value. For audit engagements on existing code, the process runs in reverse: understand intent first, then test the implementation against it.
We document intended behavior, actors, privileges, and the ways each could be abused, producing the threat model that testing and review are measured against.
Contract boundaries, state layout, access control, and upgrade policy specified in writing, with the trade-offs recorded so decisions can be defended during audit.
Contracts written against tests covering both intended behavior and failure paths, using established libraries wherever possible rather than novel implementations.
Peer review against the threat model plus automated analysis tooling, so external auditors receive code that has already cleared the predictable classes of finding.
Coordination with a third-party auditor, remediation of findings by severity, and re-review, with the final report made available to your users and partners.
Staged deployment with verification, transaction monitoring, alerting on anomalous activity, and a prepared response plan in case something requires immediate action.
Smart contracts are used wherever an agreement can be expressed precisely enough to execute automatically and where the parties benefit from not relying on one another’s systems. The sectors below are where we see the most substantive work, with the common factor being a settlement or ownership process that currently requires manual reconciliation.
Settlement, collateral, distribution, and structured products, where economic design review carries as much weight as code correctness.
Item ownership, in-game economies, and reward distribution, where transaction volume makes gas efficiency a direct product concern.
Conditional payment, milestone release, and multi-party attestation between organizations that do not share systems or trust one another’s records.
Fractional ownership, transfer restriction, and distribution logic where regulatory constraints must be enforced by the contract itself.
Automated agreement execution between known participants on permissioned networks, integrated with the ERP and accounting systems each member already runs.
Contract cost is driven by the size of the on-chain surface, how much logic is novel rather than standard, and whether independent audit is in scope. A token contract using established standards is a modest engagement; a financial protocol with custom economic mechanics is considerably larger. Third-party audit is a separate cost we help you scope and coordinate.
A short fixed-price engagement producing the behavioral specification, threat model, and architecture, which also gives you a defensible estimate for implementation.
A defined contract scope with milestones, test coverage requirements, and acceptance criteria agreed before implementation begins.
Review of contracts written elsewhere, delivered as a severity-rated findings report with remediation guidance and re-review once fixes are applied.
Continued contract work, dependency and network updates, transaction monitoring, and incident response readiness, scoped monthly.
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Cost depends on the size of the on-chain surface, how much logic is novel rather than standard, and whether audit is included. A token contract on established standards is far smaller than a financial protocol with custom economic mechanics. Third-party audit is separate.
Specification and implementation for a focused contract typically take weeks. Independent audit and remediation add several more. Protocols with custom economic design take longer because the mechanism needs review alongside the code itself.
Yes. We start by establishing intended behavior, then test the implementation against it, and deliver a severity-rated findings report with remediation guidance. Re-review after fixes is included so the final state is verified rather than assumed.
Solidity across Ethereum, layer two networks, and EVM-compatible chains, plus Rust for Solana and similar environments. We use widely reviewed base libraries and extend them only where the requirement genuinely calls for it.
Only if upgradeability was designed in deliberately, and that itself introduces governance and trust questions. We make the decision explicitly during architecture and document who holds which powers, because users and auditors examine this closely.
Through storage layout, loop and call pattern design, and profiling where transaction volume makes it matter. We avoid optimizations that obscure the code, since readability directly affects audit cost and the probability of a missed defect.
Send us a specification, an existing codebase, or a description of what needs to execute automatically and between whom. We will respond within one business day with a view on scope, the audit path, and where we think the risk concentrates. Book a free consultation through ourcontact page.
Tell us what you’re building. Our team will get back to you within one business day with a clear, no-obligation plan.
