A guide to hiring a Web3 developer
Web3 describes apps in which people sign in with a wallet and some of the data or rules live on a public blockchain. The word is used loosely, and that makes hiring harder, because job posts mix up contract writers, front-end builders and data engineers. This page is for founders and team leads who need the product side done well. It covers the work, the signs of a strong candidate and the habits that keep a remote engagement on track. It is about building products, not about buying or trading coins.
What a Web3 product is made of
There are usually four parts. Contracts hold the shared rules. A data layer reads what happened on the chain and makes it quick to search. A normal back end stores accounts, emails and anything that does not belong on a chain. A front end ties them together on screen. A Web3 developer works on the last three and talks to the contract author about the first.
The jobs people hire for
One common job is a new decentralized app front end, such as a dashboard, a marketplace screen or a members area. Another is cleanup. A product works for technical users, but new users get lost at the wallet step or give up when a transaction is slow. A third is data work, for example listing activity quickly without calling the network on every page view. Some teams also hire for the join between the chain and their existing app.
Where a Web3 developer fits among other roles
A blockchain developer covers chains, nodes and contract security. An Ethereum developer writes Solidity and tests it hard. A smart contract developer focuses on the contracts alone. A Web3 developer is the person who makes all of that usable in a browser or on a phone. A React developer can build the screens, though wallet behavior is a skill of its own.
When a Web3 developer makes sense
- Your contracts are written or planned, and nobody owns the app around them.
- Users drop out at the wallet step or at the first transaction.
- Balances and histories load slowly or look wrong for a few minutes.
- You need wallet users and normal accounts to live in one product.
- Your front-end team is strong but has never handled signing or network changes.
If a normal database would do the job, say so in the first call. A developer who tells you that before you spend money is a good sign.
Look at the user’s first five minutes
Ask a candidate to walk through what a brand-new user sees, from opening the page to finishing a first action. Notice whether they mention people without a wallet, wrong networks, rejected prompts and slow confirmations. Candidates who think about these steps build products that people finish using.
Reading a Web3 developer’s background
Ask for live products or public repositories, and for the part the person built. A list of trendy tools says little. Strong answers explain a problem, such as a screen that showed stale balances, and how it was fixed. Be careful with a background that only shows token launches or short experiments with no user feedback.
Questions to ask in interviews
- How do you check a wallet signature on the server, and what do you store after that?
- What does the screen show while a transaction is pending, and when it fails?
- How would you list a user’s history without calling the network on every page load?
- Which parts of this product should not be on a chain at all?
- How do you keep private keys and secret phrases away from your code and your users?
Good answers are specific and include real cases. Be wary of anyone who only talks about the tools and never about the user.
Try a paid mini project
Give each finalist one small, real task. Good examples are a page that connects a wallet and reads a balance on a test network, a sign-in flow that ends in a normal session, or a transaction screen with proper pending and error states. Pay for the time spent. Then compare the quality of the user messages, the readability of the code and how well they explain their choices.
Agree how the work is checked
Because real value may be involved, decide early who reviews the code, who holds the keys for deployments and how a release is approved. Use test networks first. If contracts are part of the project, plan an outside review before launch. Keep every repository and account in your company’s name, and give the developer only the access the job needs.
Working with your team
Share your user research and support questions with the developer, since confused users are the best guide to what to fix. A brief weekly meeting and one shared board of tasks keep the contract author, the designer and the developer working from the same plan.
Common mistakes
- Putting data on a chain that belongs in a normal database.
- Testing only with a developer’s own wallet and a fast connection.
- Skipping clear messages for rejected, slow or failed transactions.
- Letting the app and the contracts change without telling each other.
Looking for the chain side of the project? Read about our blockchain developers or our Ethereum developers.