Web Development
We design and build custom web applications - from an MVP that lets you quickly validate an idea to large platforms and systems developed over years. We build both the front end and the backend, APIs, databases, admin panels and integrations with external systems. We work with Next.js, React, Node.js, NestJS, Python, PostgreSQL and MongoDB, among others. We create solutions tailored to a specific business process: SaaS applications, internal systems, sales platforms, websites, marketplaces and CMS systems.
Companies that trusted us
The basics
When you need a web application, and when an off-the-shelf tool is enough
A web application is software available directly in the browser, without having to install it on the user’s computer. A custom solution makes sense especially when off-the-shelf systems no longer fit the way the company works. That can happen when data comes from several sources, the process has company-specific rules, unusual integrations are needed or more and more people are working with the same information. But not every problem requires building an application from scratch. Before we start a project, we check whether custom software is really needed, or whether streamlining the process or using an existing tool would be the better solution. That matters, because an application won’t fix a badly designed process - it can only move its problems into code.Building a website and building a web application aren’t the same thing either. A website is primarily about presenting content, so speed, UX and search visibility are key. A web application handles data, users and business processes, so security, architecture and room for future development matter more.
See the web development projects we delivered for clients
A home-cooked meals marketplace with Wolt delivery – selling your own food legally
Client: HomeChefs
Industry: Food Industry / FoodTech
Moving from mobile to web without losing users or business logic
Client: SkinApe
Industry: Entertainment / GameTech
„Boring Owl met our expectations - we got a polished front end that performs great in performance tests. The quality of the work really impressed us.”
Jan Kamiński — VP of Sales, Applover
Review from Clutch
How we work
What a project looks like: stages, responsibilities and what affects the timeline
We start the project with workshops where we learn about the business goals, the users and the key product requirements. Together, we agree on the scope of the first working version and the technology needed to build it. We split features into those essential for launch and those that can be added in later stages. This makes it easier to keep the budget, timeline and scope under control.
On our side are the system architecture, development, testing, deployment and setting up the infrastructure. On the client’s side, we mainly need a decision-maker, access to the systems that need integrating and the materials required to deliver the project.
The timeline depends mainly on the scope of the application, the number of integrations, the quality of the data to be migrated and whether the UX/UI design is already done. A simple website can be built within a few weeks. A complex web application with its own business logic, integrations and an admin panel is usually a project measured in months. We prepare a more detailed schedule once we understand the project scope.
Decisions
Decisions you'll make along the way - and what each one costs later
An off-the-shelf platform or your own code. A platform gives you a fast start and a lower entry cost, but every departure from its assumptions costs more and more, and at a certain scale it stops being possible. Your own code costs more at the start and less to change. The line runs where your process starts to become a competitive advantage - at that point, bending it to someone else’s limitations costs more than building your own.
The scope of the first version. The most common mistake is spending the entire budget on the first version and having nothing left for fixes after it meets real users. The first version should answer the question of whether the idea works, not include everything.
Who owns the code and access. Ask this before signing the contract, not after. With us, the repository, infrastructure and access belong to the client from day one - so changing vendors is a business decision, not a dead end.
What not to do. Don’t start by designing every screen before you’ve agreed what the system should do - those screens will change anyway. Don’t leave deployment until the end: a production environment set up in the last week is the source of most surprises.
Scope
What we do in web development
We build both websites and complex web applications with their own business logic. Most often we work with Next.js and React on the front end, and Node.js and PostgreSQL on the backend. In projects where the client’s team regularly publishes or edits content, we also implement a headless CMS, most often Strapi. But we choose the stack based on the product’s requirements, its scale, planned integrations and future development.
Among other things, we’ve built a subscription-based database of tens of thousands of construction projects for PolandBuild, a B2B store with a large product catalog for the Kwant wholesale chain, a system that automates contracts and payments for Balticon, and an online suit configurator for Signor Leone.Technologies we work with
- Frontend
We write interfaces in React and Next.js with TypeScript - a fast first render, good SEO and types that catch errors before deployment, not after.
- Backend and data
The application backend is Node.js with a PostgreSQL database; where the client needs to edit content themselves, we use Strapi instead of writing our own admin panel from scratch.
How we work
From the first conversation to production - and still there after launch
We start the project with workshops where we agree on the MVP scope and the architecture - we recommend a stack that we then build with ourselves, so we never advise anything we couldn’t build. We work in short iterations: every week or two we show a working piece in a test environment, not a progress presentation. The code, repository and access belong to the client from day one - that’s a principle, not a concession.
We set up the CI/CD pipeline at the start of the project, not after launch: every change goes through automated tests and onto staging before any user sees it. After launch, we stay with the project - monitoring, updating dependencies and developing the product. We’ve been developing our longest-running websites for years, rather than handing them over after sign-off.
Migrations
We move live products without stopping the business
A common starting point for working together isn’t building from scratch, but taking over an existing product. We moved SkinApe from a mobile app to a web app while keeping its users and business logic. We migrated SRDK Studio from WordPress to the Strapi headless CMS - after the migration, the website became 60% faster, and the client’s team still manages the content on its own.
BlueApart, the operator of more than 400 apartments on the Baltic coast, came to us with a problem: most bookings start on Google, so the new platform couldn’t cost a single ranking position. We moved several hundred URLs with 301 redirects, cleaned up duplicates and blocked indexing of technical subdomains. The typical dip after the switchover never came - rankings survived the migration intact. In the following weeks, with SEO work under way, organic visibility grew by double digits, and phrases the old website hadn’t covered at all made it into the TOP 3.We applied the same routine - 1:1 URL mapping, redirects, measuring traffic before and after the switchover - on our own website, moving more than 2,500 articles.Real Estate / PropTech
For developers, real estate agencies, rental operators and PropTech companies, we build systems that bring order to sales, rentals and property data.
Real Estate / PropTech ↗
PRODUCTS
Tell us what you want to build — we'll take care of the rest
We design and build mobile apps for companies and startups — from concept and UX/UI to development, backend, app store release and ongoing development. We work natively in Swift and Kotlin, and cross-platform in React Native and Flutter. We choose the technology based on the product, its features, the budget and plans for growth.
We build booking systems that take a booking, collect payment and handle cancellations without human involvement — for accommodation providers, equipment and space rental, and appointment-based services. We connect bookings with payments, availability calendars, a channel manager and service automation, so customers can check availability, book and pay without contacting staff.
We design and build B2B and B2C marketplace platforms — from an MVP to full-scale multi-vendor systems. We build the buyer and seller sides, commission models, payments, integrations and operator tools. A marketplace is two products at once: one for the buyer and another for the seller — we design both, together with the settlement model.
We design and implement CMS systems that let teams manage website content on their own — without involving a developer for every change. We choose the technology to fit the project and the way your editorial team works. We mainly implement headless CMS solutions, including Strapi, and help migrate from existing systems.
FAQ
Questions we hear before getting started
- The cost depends mainly on the scope of the first version, the number of integrations, the complexity of the business logic and whether the UX/UI design is already done. That’s why we define the MVP scope and key technical assumptions before quoting. The quote is based on a specific scope, not guesswork.
- A simple website or small MVP can be up and running within a few weeks. A more complex application with its own backend, admin panel and integrations is usually a project measured in months. We prepare a more detailed schedule once the scope of the first version is agreed.
- Yes. On most projects we recommend building the smallest version first — one that lets you validate the key business assumptions. We split features into those needed for launch and those that can come in later iterations. That way the entire budget doesn’t disappear into the first version.
- Yes. We start with a review of the code, architecture, dependencies, infrastructure and deployment process. Based on that, we identify risks and suggest how to prioritize the next steps. We don’t assume a full rewrite upfront — if the current technology allows safe further development, we work with what’s already there.
- Yes. We connect applications with ERP and CRM systems, payment providers, booking systems, external APIs and other tools the business already uses. Before we start, we check the documentation and technical capabilities of each integration — they’re often what has the biggest impact on the project’s scope and timeline.
- Yes, from day one. We set up the repository, infrastructure and accounts under the client’s organization. You have access to the code and environments even if you later decide to develop the product with a different team.
- We work in short iterations. Every week or two we show a working piece of the product in a test environment and agree on the next priorities together. On the client’s side, we mainly need one decision-maker and access to the systems and materials required to deliver the project.
- Scope changes are a normal part of product development. We first assess their impact on the budget and timeline, then decide together whether to add them to the current phase, swap them for another feature, or move them to the next iteration. We don’t implement additional scope without prior agreement.
- We can continue maintaining and developing the application: monitoring its performance, updating dependencies, fixing bugs and rolling out new features. Maintenance is billed separately and is not mandatory — the code, infrastructure and access remain yours.
Let's build digital products for your company together
Other services
UX/UI Design
We design UX/UI for web and mobile applications and B2B systems - from analyzing user needs and early wireframes to the finished interface and a design system in Figma. We don't design screens in isolation from the product. We look at user journeys, analytics data and technical constraints to create a solution that's easy to use and can be built efficiently. After the product launches, we can come back to heatmaps, session recordings, analytics and user interviews, so that the next changes are driven by data, not assumptions.
Learn moreE-commerce
We design and build online stores and e-commerce platforms tailored to your sales model and business processes. We work with off-the-shelf solutions as well as headless architecture and custom sales systems. We build e-commerce for B2C and B2B sales, large product catalogs, multiple markets and marketplaces. We integrate stores with ERP, WMS, CRM, PIM, payments and logistics, and design product configurators and custom purchase flows. We also take care of performance, technical SEO and preparing the platform for seasonal traffic peaks.
Learn moreSEO / GEO
We help increase website visibility in Google and in AI-generated answers. We combine technical SEO, content optimization and work on the site structure. We start with an audit and turn the most important recommendations into concrete changes in the code.
Learn more