How to Hire a Developer for Your App
Most founders approach developer hiring the same way they approach buying a product: compare features, compare prices, pick one. This is almost always the wrong approach, and it leads to outcomes that range from "mediocre and expensive" to "lost everything and starting over."
Here is a better process.
Define What You Are Actually Hiring For
Before posting anywhere, write a clear description of: - What the app does (one paragraph) - The tech stack or platform (or ask for their recommendation) - The specific deliverables (screens, features, integrations) - The timeline you are working toward - Your budget range (yes, include it — qualified developers will self-select, and you will waste less time)
Vague briefs attract vague proposals. Specific briefs attract developers who have read the whole thing.
Where to Find Good Candidates
Referrals: The best source, by far. Ask other founders in your network who built apps they are happy with. One warm referral from someone whose judgment you trust is worth 50 cold applications.
Toptal and Arc.dev: Vetted freelancer networks with higher rates but pre-screened quality. Good for founders who cannot evaluate technical quality themselves.
Upwork and Freelancer.com: High volume, high variance. You can find excellent developers here, but the signal-to-noise ratio requires experience to navigate. Use only with a clear brief and a structured evaluation process.
LinkedIn: Good for finding developers who are actively job-seeking or open to freelance work. Search for developers with specific stack experience in your region.
The Evaluation Process That Works
Step 1: Brief review (30 minutes of your time) Read every proposal. Immediately disqualify anyone who: (a) did not read your brief, (b) gave you a generic template response, or (c) cannot clearly explain how they would approach your specific project.
Step 2: Video call (45 minutes) Ask them to walk you through a project similar to yours that they have built. Ask: What was the hardest technical problem? What would they do differently? Ask how they handle scope changes, communication frequency, and code handover. Listen for clarity, honesty about limitations, and whether they ask questions about your project or just pitch themselves.
Step 3: Paid test project (€500–€2,000) Pay a small, clearly scoped task that is directly relevant to your project. This might be: build one screen with real data, set up the authentication flow, or design the database schema for your core entities. Evaluate the output quality, communication during the task, and adherence to the brief.
Step 4: Reference checks Call (not email) at least two recent clients. Ask: Did they deliver on time? Were there cost overruns? Would you hire them again? What was the hardest part of working with them?
The Contract Must-Haves
Before work begins, your contract must include: - IP assignment clause: all code written for this project is owned by you - Access clause: you have admin access to all repositories, deployment environments, and domain accounts - Milestone-linked payment structure: never pay more than 20–30% before the first milestone delivery - Termination clause: you can terminate for any reason with 2 weeks notice, and all work to date must be handed over - Change request process: any scope change requires written approval and revised estimate before work begins
If a developer refuses any of these terms, do not hire them.
The Most Expensive Mistake
Paying in full upfront, or paying large installments without corresponding deliverables. This removes all your leverage if quality is poor or the project stalls. Structure your payments to stay one milestone ahead, never two.
Communities Where Good Developers Already Spend Time
Job platforms are where developers go to find work. Communities are where they go to do the work. Posting in the second group often surfaces people who are not actively job-hunting but will take an interesting project from a founder who shows up where they already are.
- GitHub: Not a job board, but the single richest place to evaluate a developer before you ever speak to them. More on this below.
- Stack Overflow: A long-running question-and-answer site for programmers. A developer with a strong answer history on topics relevant to your stack has demonstrably helped strangers solve real problems, in public, for years.
- Reddit: Subreddits like r/reactnative, r/FlutterDev, and r/iOSProgramming are full of working developers. You are looking for people who answer questions thoughtfully, not people who only post their own promotions.
- Discord and Slack groups: Most major frameworks run an official community chat. These are good places to find specialists and to get a feel for who explains things clearly versus who shows off.
- Local meetups and tech conferences: Especially valuable for European founders who want someone in a compatible timezone. A developer who speaks at or regularly attends meetups is usually engaged with their craft beyond the day job.
The signal you are reading for is the same everywhere: does this person help others, explain clearly, and stay current? Those three traits predict a good working relationship better than any list of technologies on a CV.
How to Read a Portfolio Without Being Technical
You cannot judge code quality if you cannot read code. But you can judge a lot of other things, and most of them matter more for an MVP.
Open the actual apps. A portfolio of screenshots proves nothing. Download two or three of the apps a developer claims to have built and use them like a real customer. Are they fast? Do they crash? Do the screens make sense? Is anything obviously broken? An app that frustrates you will frustrate your users too.
Look at the GitHub profile. On GitHub, a developer's public contribution history is visible to anyone. According to GitHub's own documentation, the contribution graph shows public activity over time. You are not reading the code — you are checking for signals: Is there recent activity, or did everything stop two years ago? Do they have real projects with multiple updates over months, or just a handful of one-day experiments? Do not over-index on the green squares alone; padding the graph with meaningless commits is a known trick. What matters is whether the actual repositories contain real, sustained work.
Ask what their exact role was. "I built this app" can mean they wrote every line, or that they were one of eight people and only touched the settings screen. Ask directly: what did you personally build, and what did the rest of the team do? Honest developers answer this precisely. Vague developers get uncomfortable.
Check whether the portfolio matches your project. A brilliant developer who has only ever built games may not be the right fit for a booking app with payments and a back office. Relevant experience beats raw talent for a first build, because you do not have the budget to pay for someone's learning curve.
What Good Interview Answers Actually Sound Like
The existing interview steps tell you what to ask. Here is how to interpret what you hear, because the wording of an answer reveals more than its content.
On their hardest technical problem. A good answer is specific and humble: they describe a real constraint, the options they weighed, the tradeoff they chose, and what it cost them. A weak answer is either "nothing was really hard" (inexperience or arrogance) or a wall of jargon designed to end the conversation rather than explain it.
On what they would do differently. Every experienced developer has regrets about past projects. Someone who claims they would change nothing has either not built much or is not honest about it. You want measured self-criticism, not a sales pitch.
On your project specifically. The best signal in any interview is whether the developer asks you questions. A developer who immediately quotes a price and timeline without understanding your users, your edge cases, or your priorities is guessing. A developer who pushes back on parts of your scope, or flags a feature as more expensive than you expect, is doing you a favour. That friction is what you are paying for.
On things they do not know. Ask about something just outside their stated expertise. "I have not done that, but here is how I would find out" is a strong answer. Pretending to know everything is the single most expensive trait a developer can have, because it shows up later as confident mistakes.
IP Ownership: Why European Founders Need an Explicit Clause
This deserves more than one line, because the default legal position is probably not what you assume.
In the United States, the "work made for hire" doctrine can place ownership of commissioned work with the company that paid for it, when the contract says so. Many founders assume this is universal. It is not. In the United Kingdom and across much of the EU, the default is the opposite: unless your contract explicitly assigns the rights to you, the developer who wrote the code may retain copyright in it, even though you paid for it.
The practical consequence is severe. Without a written assignment, you might not have the legal right to modify your own app, hand it to a different developer, or sell your company cleanly, because part of the product still belongs to someone else.
So for a European build, do not rely on an American-style "work for hire" phrase copied from a template. Your contract needs:
- An explicit assignment of all intellectual property in the work to you or your company, effective on creation or on payment.
- A waiver of moral rights where the law allows it, so the developer cannot later object to changes you make to the work.
- A warranty of originality, confirming the code is theirs to assign and does not lift from a previous client or a licence that would infect your project.
This is the one area where paying a local lawyer to review a one-page clause is almost always worth it. The cost is small. The cost of getting it wrong can be your entire company.
Managing the Relationship After You Hire
Hiring well is half the job. The other half is the working relationship, and most founder-developer breakdowns are management failures, not talent failures.
Agree on a communication rhythm in writing. Decide before work starts how often you will get updates and through which channel. A short written update at the end of each week, plus one live call, works for most MVP builds. Silence is the earliest warning sign of trouble; a fixed rhythm removes the ambiguity.
Insist on working software at every milestone. Do not accept "it is mostly done" as a deliverable. Each milestone should produce something you can actually open and use, even if it is incomplete. Progress you cannot see is not progress you can verify.
Keep the access in your name from day one. The repository, the hosting account, the domain, the app store listings: all of these should be registered under your accounts, with the developer added as a collaborator. Never let your business depend on logging into an account that belongs to someone else.
Route every scope change through one written process. When you want a change, write it down, get an estimate of cost and timeline impact, and approve it before work begins. This protects both sides and keeps the budget honest.
Treat the test project as the start of a probation, not the end of vetting. The first few weeks of the real project tell you whether the partnership works. If communication is slow, deadlines slip without warning, or quality drifts, address it immediately and directly. A good developer welcomes clear feedback. If the problems persist, your milestone-based payment structure is what lets you part ways without losing the whole budget.