We build custom software. Faster with AI.
We quickly turn your brief into an MVP and then, in short iterations driven by your feedback, take it all the way to the final product.
Technologies we work with
JavaScript (TypeScript) · Node.js · .NET Core · AWS and Azure cloud
What we can build for you
From a fast MVP through gradual improvements to the final product and long-term care. We build software that makes sense for your business.
Fast MVP
We turn your brief into a working MVP within weeks and evolve it in rapid iterations into the final product.
Web applications
Internal systems, client portals, admin panels and SaaS products in React, Next.js or Angular.
Backend & API
Design and development of REST/GraphQL APIs, databases and server-side logic in Node.js and .NET Core.
System integration
We connect ERP, CRM, online stores, payment gateways and internal tools so that data flows between them on its own.
Modernization & refactoring
We take over a legacy application, map it out, cover it with tests and gradually migrate it to a modern stack.
Code review & audit
An independent look at the quality, security and performance of your code, with a concrete improvement plan.
Team augmentation
Senior developers who join your team and its processes – short-term or long-term.
Maintenance & support
Updates, monitoring, bug fixes and further development of your application after launch.
AI-assisted development
AI tools are part of our everyday work. They let us deliver faster and at a lower cost – but quality is always overseen by an experienced developer.
Faster delivery
We leave the routine to AI and spend developer time on architecture and logic.
Every line is checked by a human
AI suggests, the developer decides. Nothing goes to production without review and tests.
Your code stays secure
We use business licenses that don't train on your data, and we respect NDAs.
ChatGPT CodexOpenAI
Autonomous tasks across the repository – generating tests, refactoring and preparing pull requests.
ClaudeAnthropic
Working with large codebases, architecture design, code review and careful implementation.
GeminiGoogle
Analysis of documentation and large contexts, research and rapid prototyping.
AWSAmazon Web Services
Containers on ECS and Lambda functions, databases on RDS and DynamoDB, files on S3 and a CDN via CloudFront.
AzureMicrosoft Azure
App Service and Azure Functions, Azure SQL and Cosmos DB – a natural choice for .NET applications and companies on Microsoft 365.
Cloud deployment
We deploy applications to AWS or Microsoft Azure – whichever makes more sense for you. We take care of the infrastructure, security and operations.
Automated deployments
CI/CD pipelines – every approved change is tested and deployed automatically.
Infrastructure as code
Environments defined in Terraform or Bicep, repeatable and under version control.
Scaling & monitoring
Your application grows with its users, and we know about problems before your customers do.
How we work
From brief to MVP and on to the final product – in rapid iterations. You see results as we go, and you decide where to head next.
Brief
We discuss your idea, goals and priorities. The consultation is free and non-binding.
Fast MVP
Based on the brief, we quickly build a working first version you can try out right away.
Feedback-driven iterations
In short cycles, we improve the MVP based on your feedback and real-world use.
Final product & support
We bring the solution to production quality, deploy it to AWS or Azure and take care of its further development.
Frequently asked questions
Didn't find your answer? Write to us and we'll usually get back to you within one business day.
kontakt@undf.czWeb applications, internal systems, client portals, APIs and backends, system integrations, as well as taking over and modernizing existing applications. We mainly work with JavaScript/TypeScript (React, Next.js, Angular, Node.js) and .NET Core, and we deploy applications to AWS and Microsoft Azure.
First, we quickly build a working MVP from your brief that you can try out right away. Then we improve it in short iterations based on your feedback – each iteration delivers a new version until the final product is done. You validate your idea early and invest only in what you really need.
We use ChatGPT Codex, Claude and Gemini for writing and refactoring code, generating tests, code review, analyzing documentation and rapid prototyping. AI saves us time on routine work, so we can focus more on design and quality.
Not when it's in the hands of someone who knows how to work with it. Every change is reviewed by an experienced developer, and the code goes through tests and CI. For us, AI is a tool, not a substitute for expertise – we stand behind the result.
We use AI tools under business licenses that don't allow models to be trained on your data.
You do. Once paid for, all rights to the source code pass to you, and the code is available in your own repository.
Yes. We review the code, map out the risks and technical debt, and propose how to stabilize the application and develop it further.
It depends on the scope. We work either for a fixed price based on a specification or at an hourly rate for ongoing development. The initial consultation and the price estimate are free.
Yes. After launch, we take care of maintenance, updates, monitoring and further development of the application as you need.
Let's build it
Tell us about your project or the problem you need to solve. We'll get back to you with a proposal for the next steps.
kontakt@undf.czCompany details
UNDEFINED s.r.o.
Terronská 619/25
160 00 Prague 6 – Bubeneč, Czech Republic
- Company ID
- 08816646
- VAT ID
- CZ08816646
- kontakt@undf.cz
The company is registered in the Commercial Register kept by the Municipal Court in Prague, file no. C 325854.