KTree

ServicesWeb applications

We build custom web applications that stay fast under real load.

SaaS products, customer portals and back-office platforms, designed, built and supported by one engineering team. For businesses whose off-the-shelf tool no longer fits how they work, or whose current application slows down as more people use it.

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From our clients

An Italian pharma company brought KTree in to make their web applications fast.

What you get

What we hand over

  1. 01

    The application, in your name

    The working application with its full source code. The code, the data and the hosting accounts are yours, and they are handed over in full.

  2. 02

    An admin back office

    Screens for your own staff to manage users, roles, content and customer requests, with a dashboard and reports for each role.

  3. 03

    Integrations with the systems you run

    Connections to your ERP, payment provider, bank, SMS and WhatsApp services. We build API-first: every function is available through a documented API (REST or GraphQL), so other systems can use it too. The same API can be opened to AI assistants through an MCP (Model Context Protocol) server.

  4. 04

    A release pipeline, monitoring and a runbook

    CI/CD, an automated pipeline that tests and deploys each change. Observability: logs, metrics and tracing with alerts, so a problem is seen before users report it. And a runbook, the written steps for running and recovering the system.

How it works

Built to stay fast when traffic grows

Speed is decided by the design, long before any code is tuned. We choose the architecture for the load you expect, test it before go-live and watch it after.

  1. 1Pages are rendered on the server with Next.js and React, and static files are served from a CDN, so the first screen loads quickly.
  2. 2Slow work such as order processing, imports and messages goes into a queue and is handled in the background, so a spike in traffic does not block the people using the application.
  3. 3Data that is read often is cached in Redis, and search runs on Elasticsearch instead of the main database.
  4. 4The back end is split into services (microservices) in Node.js, Spring Boot, Laravel or FastAPI, running on AWS, so the busy parts can scale on their own. Where the load is uneven we use serverless functions, which run only when called.

Your options

Your options, compared honestly

  • Alternative

    Off-the-shelf SaaS

    The quickest and cheapest way to start, and the right choice when your process is standard. It gets hard when the tool has to work your way or connect closely to your other systems.

  • Alternative

    A freelancer or small agency

    Good value for a small, well-defined application. The risk is continuity: when one or two people hold all the knowledge, support and growth depend on them staying available.

  • Alternative

    A large systems integrator

    Has the depth for very large programmes and formal compliance work. For a mid-sized build you often pay for layers of management and wait longer for changes.

  • With KTree

    Build it with KTree

    One engineering team with 20 years behind it designs, builds and supports the application, at a fixed price when the scope is clear. You own the code, the data and the hosting accounts.

Problems we have already solved

Not praise. The problem, what we built, and what changed.

Airline · SMS & IM platform

A messaging gateway that dropped messages at peak hours and could not be traced end to end.

FastAPI microservices with queued delivery, retries and per-message tracing, connected to Odoo billing.

>99%message delivery

All case studies →

Technology

What we build it with

Ways to work with us

A project, a team, or support for what you already run

Project

We build it end to end

A defined scope, delivered in releases you can test. We own delivery from discovery to go-live.

Best for a new system or a rebuild

Dedicated team

Our engineers, your roadmap

Odoo, React, Node, React Native, AWS and PHP engineers who work as part of your team, month by month.

Best for a product that keeps growing

Support

Keep it running

Maintenance, upgrades and urgent fixes for ERP, web and cloud systems, including ones we did not build.

Best for a system already live

Industries

Where we have done this

Related reading

From our engineers

Before you ask

Questions about Web applications

Short, straight answers. Anything else, ask in the form below and an engineer will reply.

How do you price a custom web application?

A fixed price when the scope is clear, or a monthly rate for a dedicated team when the product keeps growing. Every estimate is written down with what is included.

How long does it take to build?

It depends on how much has to go live first. We split the work into short releases, so a first usable version is in your hands early and the rest follows in planned steps. You get a dated plan before the build starts.

Who owns the code and the hosting?

You do. The source code, the data and the hosting accounts are yours, and they are handed over in full.

Can you take over an application another team built?

Yes. We start with an audit of the code, the data and the hosting, tell you what is sound and what is at risk, and then take on support or the next phase.

How do you know it will stay fast when usage grows?

Performance and load testing are part of our QA: before go-live we run load tests with tools such as JMeter and fix what slows down. After launch, metrics and alerts show us a problem early, so we can act before users feel it.

Request a quote

Tell us what you are building.

A senior engineer replies within one working day.

  1. 1An engineer reads it. Not a sales desk.
  2. 2A short call. To understand the scope and what you run today.
  3. 3A written estimate. Scope, team and timeline on paper.
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