Smart Contract Development Services: Solidity and Solana

A smart contract is code that holds and moves value on a blockchain. Once it is deployed, every user can call it, every transaction is permanent and a bug can rarely be patched quietly. That is why smart contract development is less about writing code quickly and more about writing code that is correct, tested and safe to operate.

SemBricks builds smart contracts in Solidity for Ethereum and other EVM chains such as Base and layer 2 networks, and in Rust with the Anchor framework for Solana. We also build what surrounds the contracts: the backend, the frontend, the wallet connection and the monitoring. For an example, see our secondary token launch with tokenomics redesign on Base.

What We Build

• Custom token contracts: ERC-20 and other token standards, with minting rules, vesting, airdrops and tokenomics that are enforced in code.
• Access control: roles and permissions so that only the right accounts can pause, mint, upgrade or withdraw.
• Multisig contracts: actions that need several signatures, so one lost or stolen key cannot drain a treasury.
• Timelock contracts: a mandatory delay on sensitive changes, giving users time to react.
• Upgradeable contracts and proxy patterns: contracts that can be improved after deployment without losing state, with the upgrade rights properly secured.
• DeFi logic: vaults, staking, reward distribution, fee mechanisms and integrations with existing protocols.

Solidity on EVM Chains, Rust on Solana

Most projects run on EVM chains: Ethereum mainnet for maximum security and liquidity, or a cheaper network such as Base, Arbitrum or Polygon for applications with many small transactions. Solidity is the language there, and the same contract can usually be deployed on several EVM chains. See also our smart contract tooling for EVM.

Solana works differently. Programs are written in Rust, state lives in separate accounts and transactions are very fast and cheap. That makes it attractive for high-volume applications, but the programming model has its own pitfalls. We help you choose the chain that fits your users, your liquidity and your cost profile, not the one that happens to be in the news.

How We Work

1. Specification and threat model. We write down what the contract must do, who may do what, and what an attacker would try. This document guides the build and later the audit.
2. Development with tests. Every function gets unit tests, and critical logic gets fuzz and invariant tests that throw thousands of random inputs at it. Where possible we build on well-reviewed libraries such as OpenZeppelin instead of reinventing standard components.
3. Internal security review. Before anything goes to a testnet, the code is reviewed line by line against known vulnerability patterns.
4. Testnet and audit preparation. We deploy to a testnet, run the full flow end to end and prepare the code for an independent audit. See smart contract audit support.
5. Mainnet deployment. Deployment with verified source code, admin rights transferred to a multisig and monitoring on the events that matter.

Security Comes First

Most losses in smart contracts come from a small set of recurring mistakes: reentrancy, missing or wrong access checks, price manipulation through a weak oracle, rounding errors in reward or share calculations, and upgrade keys held by a single person. We design against these from the first line of code rather than hoping an audit will catch them at the end. For upgradeable systems we pay extra attention to who controls the proxy and how that control is limited.

Gas Efficiency Without Unreadable Code

Every operation on an EVM chain costs gas, paid by your users. We optimise storage layout, avoid unnecessary writes and batch work where it makes sense. We do not trade readability for the last few percent of gas, because code that auditors and future developers cannot follow is a security risk of its own.

More Than the Contract

A smart contract alone is rarely a product. Users need a frontend and a wallet connection, your team needs an admin dashboard, and your backend needs to index on-chain events reliably. We build these parts as well, so the contract and the software around it are designed together.

Frequently Asked Questions about Smart Contract Development

Discuss Your Smart Contract Project

Tell us what your contract needs to do, on which chain and for whom. We will help you shape the design and point out the risks before a single line is deployed.

Book a free call about your smart contracts