Website, mobile app and AI automation development
Software built to order
We take on the whole job, from the first sketch to a working product
Behind the Build Mode channel stands a team of developers. Our main work is custom software: websites, web systems, mobile apps and automation with AI. The team was put together and is led by Anton Kovalenko: he has been in software development since 2014, and in that time we have launched more than 250 projects.
You tell us what the result should be — we propose a solution, name the timeline and the price, and see the job through to launch. You deal with the engineer who answers for the project, not with a manager in between.
- Since 2014 the team’s founder in software development
- 250+ projects launched
- 1 business day to answer your enquiry
What we do
Four areas of work. Take one of them, or all at once: the website, the customer area behind it, the app and the automation come from a single team, so the parts fit each other.
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Website development
A website that brings in enquiries instead of just existing
A company website, a landing page for ads or an online store. We start not with the design but with the question of what the visitor is meant to do here — and build the structure, the copy and the layout around that one action.
What’s included
- Structure and wireframes, design, responsive layout
- We pick the technology for the project, not the project for the technology: the task, the budget and your plans for growth decide
- An admin area you can live in: text, images and pages you change yourself
- Loading speed and the groundwork for SEO: markup, meta tags, sitemap
- Several languages, forms, analytics that asks for cookie consent first
A good fit if you are launching a business or a product, have outgrown a website builder, or are entering new markets and need more languages.
A live example is the site you are reading: six languages, a theme of our own without third-party libraries, analytics only with the visitor’s consent.
Discuss a websiteStack
- WordPress
- React
- Next.js
- Node.js
- Laravel
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Web systems
A system shaped around your process, not around spreadsheets and chats
When orders live in spreadsheets and their status lives in chat, growth runs into manual work. We design and write web systems around the way your company actually works: roles and permissions, statuses, notifications, reports.
What’s included
- CRM, record keeping and internal dashboards
- Customer areas and portals for clients and partners
- SaaS products: plans, subscriptions, payment online
- Integrations: payment providers, email and SMS, stock, third-party APIs
- The back end for mobile apps and deployment to the cloud
A good fit if ready-made services do not match your process, if your data is scattered across separate programs, or if you are building a product you will develop for years.
Discuss a systemStack
- Laravel
- Node.js
- React
- Next.js
- PostgreSQL
- MySQL
- AWS
- Hetzner
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Mobile apps
An app for iOS and Android — from the idea to the stores
One codebase for two platforms: faster and cheaper than two separate apps, and the user never notices the difference. We start with a version that holds only the essentials — so you test the idea on real people rather than in a presentation.
What’s included
- Screen flows and interface design
- Built with Flutter or React Native; native when it is genuinely needed
- The back end: sign-in, data, admin panel
- Payments and subscriptions, push notifications, maps and location, work without a network, camera and QR
- Publishing to the App Store and Google Play, and updates after release
A good fit if you have a startup and need a first version of the product, if clients keep asking for an app alongside the website, or if staff out in the field need a working tool on their phone.
Discuss an appStack
- Flutter
- React Native
- Swift
- Kotlin
- Firebase
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AI automation
The routine you can hand over to AI
Enquiries, letters, documents, reports — the work that repeats every day and eats up hours. We find the part of it AI handles faster and build that part into the programs you already use. We start with one process and a small pilot: after two to four weeks you can see how much time it saves, and then decide whether to go further.
What’s included
- Assistants and chatbots that answer from your own material: on the website, in Telegram, in WhatsApp
- Sorting out what comes in — enquiries, letters, documents: read it, pull the data out, file it into your systems
- Search across the company knowledge base — by meaning rather than by keywords
- Automation scenarios and AI agents: reports, reminders, CRM updates
- Privacy: when the data must not leave the company — models that run on your own server
A good fit if staff spend hours moving data from one program to another, if support answers the same questions over and over, or if the company has piled up documents nobody can find anything in.
Discuss automationStack
- OpenAI API
- Anthropic API
- Google Gemini
- open models
- n8n
- Python
- vector databases
What you can count on
A good contractor is not a set of promises but a set of habits. Here are ours.
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More than 250 projects launched
Online stores, websites for service businesses and B2B companies, systems for logistics and manufacturing, projects for media and agencies. Chances are we have already built something close to your task — and know where it hides its traps.
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Code a project can live on
A clear structure, documentation, testing on real devices and on speed. Any competent developer will be able to carry the project on — you are not tied to us.
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An engineer answers for the project
You talk to the person who writes the code and makes the decisions, with nobody in between. We reply within a business day, and we name the risks in advance rather than on the day of delivery.
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We stay around after launch
Updates, backups, monitoring and further work. The product is not left unattended exactly when real people start using it.
How we work
Five steps, and at every one of them you know what is going on.
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Your enquiry
You write to us in two or three sentences about what you need. We reply within a business day and ask the questions that matter.
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Review and estimate
We go through the task, propose a solution and within a day or two name the timeline and the price — with a list of what they cover.
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Wireframes and design
First the structure and the logic on diagrams, then the looks. Changing a wireframe costs less than changing finished code, so this is the step where we argue.
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Development
We work in stages and keep showing you something that runs, not reports. You see the product long before it is handed over.
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Launch and support
We move it to the live server or publish it to the stores, and hand over the credentials and the documentation. After that come support and further work.
The team
Who stands behind this
The team was put together and is led by Anton Kovalenko — an engineer and the author of the Build Mode channel. He has been writing software since 2014, and before that he spent ten years designing and repairing electronics. Hence the habit our work rests on: a thing should be made so that it can be understood, repaired and taken further.
“I lead every project myself, from the first conversation to the launch. We do not take on a job whose result I am not ready to answer for personally.”
Common questions
What does development cost?
It depends on the scope: the number of pages or screens, the integrations, the design, the languages. We do not print prices starting from a figure — they say nothing about your task. Tell us what you need, and within a day or two we will name the price and the timeline with a list of the work. The estimate is free and commits you to nothing.
How long does it take?
A small website — from two weeks. An online store or a web system — from one or two months. The first version of a mobile app — from a month and a half. The exact timeline comes with the estimate, and we warn you in advance if anything moves it.
We already have a website or a system. Will you take on someone else’s code?
Yes. First we look at what is there: the code, the server, the bottlenecks. Then we say honestly which pays off better, improving it or rewriting a part of it. We can run the project end to end, or join your own team for one piece of the work.
Who do you work with, and how?
We are from Ukraine and work remotely — with clients in Ukraine, Europe and the United States. We write, we call, we hold video conferences — whichever suits you. The product itself we build in any number of languages: this website, for one, runs in six.
Who owns the code and the accounts?
You do. The repository, the domain, the hosting and the store and service accounts are registered to you or handed over to you at launch — together with the documentation.
What happens after launch?
A product needs looking after: updates, backups, monitoring, small fixes. You can leave that with us or take it on yourself — the documentation makes that possible. New features are built the same way as the main project: an estimate, stages, a result you can see.
Tell us what needs building
Two or three sentences are enough: what the product is, who it is for and when you need it. We reply within a business day — with questions that matter and without pushy calls.