How to Hire an App Developer: Screening, Rates, and Contracts

Hiring an individual app developer is a different problem from selecting a development company. With an agency you are buying a managed outcome and evaluating a process. With an individual you are buying capability and evaluating a person, and you are taking on the coordination work an agency would have done.

That trade is worth making when you can specify what you need and assess whether you got it. This is how to do both.

First, work out which developer you need

App development is several jobs, and one person rarely does all of them at a professional standard.

Mobile developer. Builds the app users touch. Specialisms are iOS in Swift, Android in Kotlin, or cross-platform in Flutter or React Native. Hire for the specific one your product needs rather than for mobile in general.

Backend developer. Builds the API, database, authentication, integrations, and business logic. Frequently 40 percent or more of the work, and the role most often omitted from a hiring plan because it is invisible in a design.

Full-stack developer. Covers both to a useful standard. Genuinely capable full-stack developers exist and are excellent value for a first version, and the title is also widely claimed by people who are strong on one side and thin on the other.

Product designer. Not a developer, and needed. Products designed by developers have a recognisable quality.

A realistic minimum for a first version is a mobile developer, a backend developer, and access to design, or one strong full-stack developer plus a designer. Hiring one mobile developer and expecting an app is the most common structural mistake in this route.

Where to look, and what each source is good for

Referrals from technical people you know. The highest-quality source by a wide margin. Ask three technical acquaintances before posting anywhere.

Specialist job boards and communities. Slower and higher signal than general marketplaces. Developers who participate in professional communities tend to be more current.

Freelance marketplaces. Fast, enormous supply, extremely variable quality, and heavily gamed rating systems. Usable with rigorous screening and a paid trial. Not usable as a substitute for screening.

Open-source contribution history. Public code is the most direct evidence available. Even if you cannot read it, the existence of a maintained repository with commits over time and issues responded to tells you something a CV cannot.

Rates, honestly

Two cautions about the low end of any of these ranges. A rate substantially below the local market usually indicates either inexperience or someone running several clients simultaneously, and the second is more damaging because it presents as availability. And a low rate paired with no code review on your side is how you acquire a codebase nobody else can maintain, which is a cost that lands eighteen months later.

Screening without being technical

You can assess a developer usefully without reading code. Five approaches, in order of value.

Ask them to explain a past project’s hard part. Not what they built, what was difficult and how they resolved it. Genuine practitioners have specific answers involving tradeoffs. Weak candidates describe features.

Ask what they would need from you. A strong developer asks about your data, your integrations, your users, and your constraints. Someone who takes a vague brief and quotes immediately is either very experienced with your exact problem or not listening.

Ask them to critique your idea. The best signal on this list. A developer willing to tell you a feature is expensive relative to its value, or that you should build less, will save you money repeatedly. Uncritical enthusiasm is a warning rather than a virtue.

Run a small paid trial. One to two weeks of real work, paid at their rate, with a defined deliverable. This is the single most reliable screening mechanism available and almost nobody does it, because it feels slow. It is far faster than discovering the answer in month three.

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Buy two hours of independent technical review. An engineer you trust, or a fractional CTO, reviewing candidate work and joining one call. This typically costs a few hundred dollars and is the highest-value money a non-technical founder can spend on hiring.

In practice, the paid trial resolves more uncertainty than every interview question combined. Two weeks of real work at market rate shows you code quality, communication rhythm, estimate accuracy, and how someone behaves when something turns out harder than expected.

What to put in the contract

Six terms, and the first three are non-negotiable.

IP assignment on payment, covering code, designs, and documentation. Without an explicit assignment clause, ownership of contractor work is not always what people assume.

Repository and infrastructure under your accounts. Code committed to your repository from day one, not delivered at the end. Cloud accounts in your name with the developer added as a user.

Deliverables and acceptance criteria, written per milestone, so finished has a definition and final payment is not a negotiation.

Milestone-based payment, tied to verifiable deliverables. A modest deposit is normal. Large upfront payments shift all risk to you and cross-border enforcement is impractical in reality.

Confidentiality, proportionate rather than aggressive.

Notice and handover, including documentation and a defined exit. A developer leaving with the only mental model of your codebase is the standard failure mode of this route.

Warning signs during hiring

Six patterns that predict trouble, in rough order of how reliably.

A quote with no questions. Someone who prices a vague brief without asking about your data, integrations, or users is either pattern-matching to a template or not planning to be accurate.

Uncritical agreement. Every feature is easy, every timeline is fine, nothing is a concern. Experienced developers have opinions about what is expensive relative to its value.

Portfolio work that cannot be attributed. Claims of contribution to well-known apps with no detail about which parts. Ask what they specifically built and listen for specificity.

Reluctance to commit code continuously. Anyone who wants to deliver at the end rather than push to your repository as they go is asking you to accept an unverifiable process.

Estimates without ranges. A confident single number on unfamiliar work is a sales figure. Real estimates have ranges and stated assumptions.

Availability that seems too good. A senior developer available to start full-time tomorrow at a below-market rate is usually running several clients concurrently, and you will be the one whose work slips.

Comparing the freelance route honestly against a firm

The comparison people make is a freelance hourly rate against an agency hourly rate, and it omits three costs that make the routes closer than they appear.

Coordination. Four to eight hours a week of your time for an active build, across five months. Price that at whatever your time is worth and it is a substantial line.

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Oversight. A fractional CTO or technical reviewer at $1,000 to $4,000 monthly is what makes the lower rate real rather than nominal, and skipping it is how you acquire an unmaintainable codebase.

Gap coverage. A mobile developer, a backend developer, and design is three engagements. Quality assurance is frequently the fourth and frequently the one nobody buys, which is why single-developer projects most often fall short on polish and edge cases.

A worked version: a $55,000 freelance build across three contractors, plus $12,000 of oversight, plus your own time, sits considerably closer to an $85,000 fixed-scope agency engagement than the raw quotes suggest. Bolder Apps prices project work fixed-scope rather than hourly with projects starting around $30,000 and quotes MVP engagements at 8 to 20 weeks, and the distinction worth holding onto when comparing is not the rate but who absorbs the estimate being wrong.

Managing an individual developer

The coordination work an agency would have absorbed is now yours, and it is roughly four to eight hours a week for an active build.

Write specifications rather than describing features verbally. A written description of what a screen does, what happens on error, and what the acceptance criteria are prevents most rework.

Insist on something runnable every one to two weeks. Long silences are where projects quietly go wrong, and a developer who resists frequent testable builds is often behind rather than busy.

Require code in the repository continuously and read the commit history even if you cannot read the code. Frequency and consistency are legible without technical knowledge.

Arrange independent code review, monthly or at milestones. This is the mechanism that makes the freelance route economically real rather than nominally cheaper.

When to hire a firm instead

Three honest signals that individual hiring is the wrong route for you.

Nobody on your side can write a specification or assess whether work is good, and you are not willing to pay for someone who can.

You need several disciplines simultaneously and do not want to coordinate them, since managing four contractors is a part-time job with a fractional project manager’s skill requirement.

You need a committed date and a fixed budget for a board, an investor, or a launch. Individual contractors do not typically absorb estimation risk, and firms structured around fixed-scope pricing do. Bolder Apps prices project work fixed-scope rather than hourly with projects starting around $30,000 and quotes MVP engagements at 8 to 20 weeks, and the relevant distinction when comparing against a freelance quote is not the rate. It is who pays when the estimate is wrong.

Sources

• US Bureau of Labor Statistics, Occupational Outlook Handbook, software developers
• Internal Revenue Service guidance on independent contractor classification, irs.gov
• US Department of Labor guidance on worker classification, dol.gov
• World Intellectual Property Organization guidance on software IP assignment, wipo.int
• Apple and Google developer account ownership documentation