Smart contract engineering for EVM (Solidity)

Production-grade Solidity: design, implementation, tests, upgrades, and deployment pipelines. Built to work with real integrations, data flows, and operational constraints.

What you get

Many projects fail after deployment because the operational layer is missing. We design for the bigger picture: backend services, indexing, and monitoring so the system can run in production.

We ship contracts that are maintainable, testable, and safe to operate over time.

Contract architecture & design

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Define modules, permissions, upgrade strategy, and failure handling. Output: spec + architecture mapping from business rules to contract components.

Implementation (Solidity)

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Clean, reviewable code with clear interfaces and documentation. Output: contracts ready for integration and staged rollout.

Testing strategy

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Unit tests, integration tests, and invariant/property-based testing where it matters. Output: test suite designed to catch regressions and edge cases.

Upgradeability & migrations

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Upgrade paths that don’t break integrations or operational workflows. Output: upgrade/migration plan + scripts + runbooks.

Deployment pipelines

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Repeatable deployments, configuration management, and release discipline. Output: deployment scripts, environments, and checklists.

Integration support

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Contract interfaces designed to fit backend services, indexers, and reporting outputs. Output: integration guidance + event design that supports downstream systems.

Common use cases

Scenarios where robust engineering matters more than just "making it work".

Token contracts and lifecycle logic

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Issuance, transfers, restrictions, redemption-oriented flows, and role-based permissions.

Stablecoin payment primitives

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Escrow, routing, fee logic, settlement helpers, and programmable controls.

DeFi modules

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Lending/borrowing logic, interest accrual, collateral rules, liquidations, and fee models.

Protocol upgrades & refactors

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Upgrading legacy contracts safely, with staged rollouts and integration stability.

How we work

1

Discovery

Scope mechanics, permissions, risks, and integration requirements.

2

Architecture

Define modules, upgrade strategy, and event design for indexing/reporting.

3

Build

Iterative delivery with reviews, tests, and clear release checkpoints.

4

Launch & support

Deployment discipline, monitoring hooks, and post-launch stability support.

Get a digital asset roadmap in 24 hours

One short brief. We’ll reply within 24h (business days) with architecture options, key risks, and next steps.

Hire us
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European UnionEuropean Funds

NEXT ENTERPRISES LIMITED LIABILITY COMPANY

is implementing the project „Audit of smart contracts using artificial intelligence”

Project co-financed by the EU:
3 090 156,39 PLN

Smart Contract Development | Solidity (EVM) – Nextrope