Add the next feature to your software by describing it.
The app runs the business. What it needs is one more screen, one more integration, or the fixes that have been waiting for months. Instead of a job posting or an agency quote: connect the repository, describe the change, and Evonx builds it inside your existing architecture, previewed live and delivered as a pull request.
Why Evonx?
Not finding a developer. Getting the work done.
The hard part of touching existing software is not writing code; it is changing an architecture nobody fully remembers without breaking it. Evonx understands your codebase first, then routes the change through that structure.
Maps your code first
When the repository is connected, Evonx maps modules, services, APIs and the links between them into a live graph. The change starts knowing where to go, even without documentation.
Fits the existing architecture
New features are written in your patterns: the same layers, naming and data model. Code your team, or the next developer, will not find foreign.
Preview first, decide second
Every change runs in an isolated environment with realistic data. Say what you don't like and watch it change; nothing reaches your main branch until you approve it.
Delivered as a pull request
The result lands in your repository as a clean pull request. Review it, revert it, build on it. The code is always yours, with no platform lock-in.
Integrations in the same flow
Payments, shipping, invoicing, marketplaces, banking: the systems your software never connected to are added from the same conversation. No separate integration project, no separate vendor.
Code and data under your control
Repository access is granted with least privilege; previews run in their own isolated container with a separate database. Your production system is never touched directly.
How it works
Connect, describe, approve
Connect the repository
Connect your GitHub or GitLab repository. Evonx reads the codebase and maps modules and dependencies, whatever the stack.
Describe the change
'Add Stripe payments to orders', 'add an Excel export to reports', 'open a customer portal'. A sentence, not a specification. Evonx asks when something is missing.
Review the preview, approve the PR
The change runs in a live preview within minutes. When you are happy, review and merge the pull request; you decide when it ships.
Three routes
Hiring a developer, an agency, or Evonx
For small and medium changes a full-time developer is expensive and an agency means quotes and queues. Evonx is the third route: developer flexibility, platform speed and predictable cost.
What gets built
The most common additions to existing software
The request always sounds the same: 'We have software, we just need it to do this too.' The system's name changes; the shape of the need does not.
Describe your change- Adding payment, shipping or e-invoicing integrations
- Opening a new module such as a customer or partner portal
- Making old screens mobile-friendly
- Adding reports, Excel exports and dashboards
- Clearing years of accumulated bugs and performance fixes
- Taking over projects whose original vendor is no longer reachable
Related solutions
If the need is bigger
When the change is larger than a single feature, these pages may fit better.
Legacy application modernization
When the old system can no longer carry the load: rebuild on a modern stack with the same business rules.
ExploreAI for existing software
Continue developing real repositories with an AI agent — not only greenfield generation.
ExploreConnect a GitHub repository
Guide: import an existing repo and keep shipping changes as pull requests.
ExploreCustom software development
When what you need does not exist yet.
ExploreFrequently asked questions
Improving existing software
Which technologies do you work with?+
All common web and server stacks: .NET, Java, Node.js, PHP/Laravel, Python, React, Angular, Vue and similar. The prerequisite is that the code lives in a Git repository (GitHub or GitLab). If there is no repository yet, we plan getting the code into one together.
Will our code break? Is production at risk?+
No. Evonx never touches your production system; the change is made on a separate branch and run in an isolated preview environment with its own database. Only pull requests you have reviewed and approved reach your main branch.
The vendor who built it is gone and there is no documentation. Does it still work?+
This is the most common situation. If you have the code, that is enough: Evonx reads the codebase, maps modules and dependencies, and derives the current behaviour from that map. Changes go to the right place without documentation.
Is this a rewrite?+
No. This page is about adding features to, integrating and maintaining software that already works; the existing architecture is preserved. If the system has genuinely reached the end of its life, see the legacy application modernization page for a rebuild.
Our own team works on the same code. Will it conflict?+
No. Evonx works like any team member: on its own branch, opening pull requests. Your team reviews, comments and merges; your existing code review and CI processes stay exactly as they are.
How is it priced? Do we get a quote for every change?+
No. Evonx works on a platform subscription; there are no per-change quotes, scope negotiations or minimum project budgets. A small fix and a new module move through the same conversation. Current plans are on the pricing page.
You have the software. Let it grow.
Start clearing the change backlog today.
Connect the repository, describe the first change, and see it in a live preview within minutes.
Start free