How to Hire a Full-Stack Developer for Your Startup

Hiring your first developer is one of the highest-leverage decisions a founder makes. Get it right and you ship a real product in weeks. Get it wrong and you spend months untangling code you can't maintain — or paying someone else to rewrite it. The hard part is that you are often hiring for a skill you don't have yourself, which makes it tempting to judge on credentials or hourly rate instead of the things that actually predict success. Here is how to evaluate a full-stack developer without being technical yourself.

What "full-stack" should actually mean

A real full-stack developer can own a feature end to end: the database schema, the API, the user interface, and the deployment that puts it in front of users. The value isn't that they have memorized every framework — it's that they can make decisions across all of those layers without waiting on three other people and three separate handoffs. For an early-stage product, that single-owner accountability is worth more than deep specialization in any one area. You want someone who can take "users should be able to book and pay for a session" and return a working, deployed feature — not someone who needs a separate backend engineer, a DevOps person, and a designer to move an inch.

That breadth is exactly the model behind my full-stack web development work: one person who can hold the whole system in their head and ship it.

How to evaluate a candidate in one call

You don't need to read code to judge a developer. Ask them to walk you through a project they actually shipped and listen for these things:

• Can they explain a technical decision in plain language, and the trade-off behind it? "We used X instead of Y because we needed Z, and the cost was W" is the shape of a good answer.
• Do they talk about the users and the business problem, or only about the technology? The best engineers frame their work in terms of what it let people do.
• Did they handle the unglamorous parts — payments, edge cases, error states, deployment, handoff — or just the happy path?
• Can you see the work live, and does it actually function when you click around?

A useful, low-effort test is to ask for something you can click. For example, the DJP Athlete platform is a full production system you can open and reason about. That is the bar a candidate's portfolio should clear: real, live, and explainable.

Run a small paid trial, not a whiteboard quiz

Whiteboard puzzles tell you whether someone can invert a binary tree under stress. They tell you almost nothing about whether someone can ship your product. A far better signal is a small, paid trial task — a self-contained slice of real work, scoped to a day or two, that you pay for at their normal rate. Watch how they scope it, how they communicate when something is ambiguous, whether they ask the right questions, and whether what they deliver is something you could actually deploy. A developer who turns a vague request into a sensible, working deliverable with a couple of clarifying questions is showing you exactly what working with them will feel like.

Red flags worth a month of rework

• No deployed work to show. A portfolio of private repositories and screenshots is far weaker than something you can click and use.
• Vague answers about who owns the code and the accounts. You should own your repository, your database, your domain, and your cloud accounts — full stop.
• No mention of testing, documentation, or handoff. If a developer never talks about how you would take over or bring in the next person, that is how you end up locked in.
• Estimates with no ranges or assumptions. "Two weeks" with no caveats usually means they haven't thought about what could go wrong.

Who should own the code, accounts, and infrastructure

This is the part founders most often get wrong, and it is the most expensive to fix later. Before any work starts, agree in writing that you own the intellectual property, and make sure the actual accounts are created in your name: the GitHub or GitLab organization, the production database, the domain registrar, the hosting platform, and any third-party services like your payment provider or email sender. A good developer will insist on this too, because it keeps the relationship clean and makes handoff trivial. If a candidate is cagey about it, treat that as a serious warning sign — you do not want your business held hostage by a login only one person controls.

How developers price work, and what to expect

There are three common models, and each fits a different situation. Hourly is flexible and fair for open-ended or exploratory work, but it puts the estimating risk on you, so insist on a weekly cap and regular demos. Fixed-price works when the scope is genuinely well-defined; it moves the risk to the developer, who will reasonably pad the number to cover uncertainty. Retainer — a set number of hours or a monthly fee — suits ongoing product work where you want someone reliably available. For a first build, a hybrid is often best: a small fixed-price discovery phase to nail down scope, then hourly or retainer for the build once everyone understands what they are making. Whatever the model, the deliverables and ownership terms matter more than the headline rate.

Working across time zones

Plenty of excellent developers work remotely from outside your country, and the cost difference can be significant. The thing that actually matters is overlap and communication: a few hours of shared working time for calls and reviews, written updates you can follow without chasing, and a clear milestone plan you both look at. I work with international clients across exactly this kind of arrangement, and in practice time zone is a logistics question, not a quality one — a disciplined async developer five hours away will outperform a poorly organized one down the street.

The bottom line

Hire for ownership and communication over a specific framework. Frameworks change; the ability to take a fuzzy business problem and return a working, deployed, maintainable system does not. The best signal is simple: can they show you something real, explain why they built it that way, and tell you honestly what they would do differently next time. If you want to talk through a project — what to build first, how to scope it, and what it should realistically cost — get in touch and I'm happy to give you a candid read on scope and approach.