My Solidity experience comes from a founder project: in GhoVerse we designed and implemented our own token and NFT contracts and integrated them with the game client. Because code in a smart contract can't be changed afterwards, I start by clarifying the economic model and the edge cases.
Solidity is the language of smart contracts that run on Ethereum and EVM-compatible networks. The expertise isn't just writing contracts; it's designing token supply, permissions, burning and reward mechanics, and the user flow together. Because a contract can't be changed after deployment, errors are expensive; so I put the weight on the design and testing phases.
ERC-20 suits a fungible currency or points system. ERC-721 is used for assets that are each unique (character, planet, artwork). ERC-1155 lets you manage both unique and multi-copy assets under the same contract; for mixed collections like game items it's advantageous in terms of gas and management. The choice is made according to the product's economy, not because it's fashionable.
The contract is first written with clear requirements: who can mint, what is the supply cap, is there burning, is there a transfer restriction, is it upgradeable? Then it's deployed on a testnet, scenarios are tried and verification is done. Before going live, the network choice, gas cost and upgradeability decision are settled; an upgradeable contract gives flexibility but adds complexity and attack surface.
Access control, reentrancy risks, integer overflows and edge cases are handled separately. Contracts are tested on a testnet with real scenarios. I'm not an independent audit firm; for critical, high-value contracts I always recommend a third-party audit.
Keeping off-chain data that doesn't need to be on-chain, and reducing loops and unnecessary storage, directly affect the user experience. Mint and transfer costs are measured at the design stage; for bulk operations in particular, more efficient standards like ERC-1155 are considered.
If digital ownership, transferability or open verification is a real need, a smart contract makes sense. Otherwise a traditional backend offers a cheaper, faster and easier-to-maintain solution. I say this honestly when evaluating scope.
My experience is on Polygon and EVM-compatible networks. That covers contract deployment, verification and application integration.
I'm not an independent audit firm. I apply security checks during development and recommend a third-party audit for critical contracts.
It depends on the economy. In GhoVerse the ERC-20 token carried the game economy while the NFTs carried character and planet ownership; both were used together.
It's evaluated case by case. Upgradeability gives flexibility but adds complexity and attack surface; we make the decision together with the scope.
The number of contracts, standard choice, test coverage and integration work define the scope. I first produce a clear scope, then share the time and cost.
Yes. I can review the code and report risks in terms of permissions, economy and security; this doesn't substitute for an independent audit report.
