Hiring a developer for an established engineering team and hiring a full-stack developer for a startup are different problems.
In an early product, requirements move. The founder is still learning. Technical decisions affect product decisions, and there may not be a separate designer, architect, DevOps engineer and product manager.
That means the person you hire needs more than a list of frameworks.
Start by defining the outcome, not the stack
A job post that begins with fifteen technologies often attracts people who match keywords without clarifying what the product needs to accomplish.
Start with the outcome instead:
- build a working SaaS MVP for a specific customer;
- replace a manual workflow with a web application;
- launch a customer portal connected to an existing system;
- stabilize and extend an existing product.
Then describe the current stack if one already exists.
Look for product judgment
Early-stage development contains tradeoffs every day.
A useful startup developer should be able to explain what can wait, where a shortcut is safe, where it is dangerous and how a feature affects future work.
Ask candidates to reduce a feature list, not only estimate it. The conversation will reveal whether they think about business risk or simply convert requirements into tasks.
Ask who actually owns each layer
"Full-stack" can mean many things.
For your project, clarify whether the developer is comfortable with frontend interfaces, backend logic, database design, authentication, APIs, deployment and production troubleshooting.
They do not need to be the world's best specialist in every layer. They do need to know where their responsibility ends and when another specialist is required.
Evaluate similar problems, not identical industries
A developer does not need to have built your exact startup idea before.
More useful evidence may be experience with similar technical risks: subscriptions, multi-role dashboards, large content databases, complicated forms, third-party integrations, reporting or legacy migration.
Ask them to explain the difficult part of a past project and what they changed when the original plan was wrong.
Direct communication matters more in a small team
If the person writing the code also speaks directly with the founder, the feedback loop can be extremely short.
You can review a workflow, discover that it is too complicated and change it before a large amount of work builds on top of the wrong assumption.
This is one reason a senior independent developer can be a strong fit for focused MVPs. I compare that model with larger teams in freelance developer vs agency.
Ask practical technical questions without turning the interview into trivia
You do not need to quiz someone on obscure syntax.
Ask questions tied to your product:
- How would you structure permissions for our user roles?
- What would you build manually and what would you buy as a service?
- How would you handle failed payments or external API failures?
- What would you monitor after launch?
- What would make you recommend changing the scope?
- How would another developer take over this code later?
Good answers should be understandable even if you are not a developer.
Source code and account ownership should be clear
Your company should know where the source code lives, who owns the hosting, which accounts control the database and how production credentials are managed.
Do not leave this until the end of the project.
A professional setup makes handover possible even if you expect the relationship to continue for years.
Discuss support before the launch
Every real product discovers issues after users arrive.
Agree on what happens after launch, how urgent bugs are handled and whether ongoing product work is part of the relationship.
The right support model depends on the product. A small internal tool has different needs from a paid SaaS application used every day.
Watch for warning signs
I would be cautious when a developer:
- commits to a fixed architecture before understanding the workflow;
- says yes to every requested feature without questioning priorities;
- cannot explain decisions without heavy jargon;
- has no clear approach to deployment or production errors;
- avoids questions about source-code ownership;
- focuses only on visible frontend work when the product depends on backend rules.
A strong startup developer should make the product simpler
The goal is not to hire someone who can write the most code.
The goal is to get from uncertainty to a useful product with as little unnecessary complexity as possible.
If you are preparing to hire for an MVP, first make sure the scope is small enough to evaluate. My guide on what to build first in a SaaS MVP can help.
If you would rather work directly with the person building the product, see my full-stack development work and MVP development approach.
