Knowing how to choose a software development company matters more than picking the right framework. The team you hire will shape your product's scope, quality, budget and launch date — and switching partners halfway through is expensive. This guide walks you through the checks that actually separate a reliable partner from a risky one, with a checklist at the end.
Define what you need before you compare companies
Vendors can only be compared against the same input. Before you send the first message, write down a short brief. It doesn't need to be technical; our guide on how to write a brief for app development includes a template you can copy.
- The outcome. What should the product let users do, and what result do you expect for the business?
- Platforms. Web app, iOS and Android apps, admin panel, website — or a combination.
- Budget range and deadline. Even rough numbers help companies propose a realistic first release.
- What stays in-house. Do you have a designer, a product manager or your own developers who will work alongside the team?
- The kind of partner you need. A team that builds the whole product end to end, or extra developers for your existing team.
How to check a portfolio
Almost every studio has nice screenshots. What you want is evidence that the team has shipped products similar in complexity to yours and kept them working.
- Live apps in the stores. Download two or three apps from the portfolio. Do they open quickly, look polished and still receive updates?
- Case depth. A good case study explains the problem, the users, the features and the technical parts — backend, integrations, admin panel — not only the visual design.
- Similar complexity, not just the same industry. A team that has built real-time tracking, payments or booking logic can apply that experience in a new domain.
- The invisible parts. Ask to see an admin panel or API documentation. These show how the team handles the work clients rarely look at.
- The people. Ask who from the portfolio projects would work on yours.
You can see how we present our own projects on the OXIOS portfolio page: each case describes what the product does, which platforms it runs on and what was built behind the interface.
Questions to ask before you sign
Process and communication
- How do you start a project — is there a discovery phase, and what do I receive at the end of it?
- How long are your iterations, and when will I see working software?
- Who is my day-to-day contact, and how often do we talk?
- Which tools do you use for tasks, documentation and communication, and will I have access?
Code ownership, IP and NDA
- Who owns the source code, designs and other intellectual property? The contract should transfer IP rights to you, usually upon payment.
- Will the code live in a repository I own or can access at any time?
- Will you sign an NDA before we discuss details?
- Who owns the App Store and Google Play developer accounts, domains and cloud hosting? Ideally, they are registered to your company.
Quality and support after launch
- How do you test — manual QA, automated tests, testing on real devices?
- How do you handle bugs found after release, and for how long?
- What does ongoing support look like: monitoring, OS updates, small improvements?
- If we stop working together, how is the project handed over?
Pricing models: fixed price vs time & material vs dedicated team
The pricing model defines who carries the risk when scope changes. None of them is better in general; each fits a different level of certainty.
| Model | How it works | Pros | Cons | Best for |
|---|---|---|---|---|
| Fixed price | One price for an agreed scope | Predictable budget, clear deliverables | Changes need formal change requests; vendors add a risk buffer to the price | Small, well-defined projects or a discovery phase |
| Time & material | You pay for actual hours, usually per sprint | Flexible scope, you can reprioritise as you learn | Final cost is less predictable; requires your involvement | MVPs and products where requirements will evolve |
| Dedicated team | A team works only on your product for a monthly fee | Deep product knowledge, steady pace, long-term planning | Highest monthly commitment; you need enough work to keep the team busy | Long-running products with an ongoing roadmap |
A common approach combines models: a fixed-price discovery phase, followed by time & material development with a budget cap per sprint. You get predictability at the start and flexibility once you see the product in users' hands.
Red flags
- A detailed fixed price after a single short call, with no questions about your users or integrations.
- An estimate far below every other offer, without an explanation of what is excluded.
- No access to the code repository until the end of the project.
- Vague answers about who owns the code and accounts.
- No visible testing process and no plan for support after launch.
- Pressure to sign quickly, or a portfolio that consists only of screenshots without live products.
- "Yes" to every feature request without discussing trade-offs in time and cost.
Start with a discovery or trial phase
You don't have to commit to a six-month contract to find out whether a team fits. A short discovery phase — typically a few weeks — produces user flows, a prioritised scope, an architecture proposal and a refined estimate. It is also a real test of how the team communicates, asks questions and handles your feedback.
Make sure the results belong to you. If the collaboration doesn't continue, you should be able to take the documents to another team. If it does continue, development starts faster because the hardest questions are already answered.
Outsourcing app development to Ukraine: what to expect
Ukraine is in the Eastern European time zone: UTC+2 in winter and UTC+3 in summer. That is one hour ahead of Central Europe and two hours ahead of the UK, so a normal working day overlaps almost completely with most European clients. With the US East Coast the difference is about seven hours, which still leaves a shared morning window for calls.
When you evaluate a Ukrainian team, check the same things you would check anywhere, plus a few practical ones:
- Language. Have a call with the people who will actually work on your project, not only with a salesperson, and check how comfortable they are discussing details in English.
- Written communication. Ask for an example of a sprint report or demo notes. Clear written updates matter more than the time zone.
- Continuity. Ask how the team handles power or internet outages and where the code and documentation are stored.
Checklist: how to choose a software development company
- Write a short brief: outcome, users, platforms, must-have features, budget range, deadline.
- Shortlist three to five companies with products similar in complexity to yours.
- Download and try their live apps; read the case studies in full.
- Talk to the people who would work on your project.
- Ask about process, iterations and how often you will see working software.
- Confirm in writing that you own the code, designs and accounts.
- Sign an NDA if your idea or data is sensitive.
- Ask how testing works and what support after launch includes.
- Choose a pricing model that matches how certain your scope is.
- Check for red flags: suspiciously low prices, no repository access, no questions.
- Start with a discovery or trial phase before committing to the full build.
- Agree on how the project will be handed over if you part ways.
How we work at OXIOS
OXIOS is a web and mobile development studio from Kharkiv, Ukraine, working with clients worldwide in European time. Every project starts with discovery — goals, users, scope, risks, technology choice and a roadmap — followed by UX/UI design and development in two-week sprints with daily syncs, a demo and a retrospective after each sprint. Then come QA, release to the App Store, Google Play or the web, and support after launch.
Most of our mobile app development is done with React Native and Expo, with Node.js backends and admin panels. If you'd like to see how this checklist applies to your project, send us a few sentences through the contact form — we reply within one business day with a free estimate.