Symfony applications are built to last, but every major version brings deprecations, and falling several versions behind makes each upgrade harder and riskier. CSNexa audits your Symfony application, plans the upgrade path version by version, resolves deprecations and dependency conflicts, and delivers it with tests at each step — for clients in the UK, Europe, the US and worldwide.
Who it's for
- Companies running Symfony applications several major versions behind the current release
- Teams blocked by deprecations, outdated dependencies or old PHP versions
- Businesses in the UK, Europe and the US that want a reliable partner for long-term Symfony maintenance
Our Symfony upgrade services
- Free Symfony upgrade audit and roadmap
- Step-by-step upgrades to current LTS releases
- PHP 8 upgrades and dependency updates
- Deprecation fixes using the Symfony deprecation log and Rector
- Doctrine and API Platform upgrades
- Monthly maintenance and security update plans
What you get
- Upgrade audit covering Symfony version, PHP version, bundles, dependencies and test coverage
- Version-by-version upgrade roadmap with a fixed price
- Resolved deprecations, updated bundles and Composer dependencies
- Doctrine, Twig and API Platform upgrades where used
- Automated tests and CI pipeline so future upgrades are routine
Ready to discuss your project?
Book a free discovery call and get a fixed-price quote within 4 hours.
Get Your Free EstimateUse cases
Major version upgrades
Step-by-step upgrades through each major Symfony version to a current long-term-support release, fixing deprecations before each jump.
PHP and dependency upgrades
Moving the application to a supported PHP 8 version and updating bundles and libraries that block the upgrade.
Ongoing maintenance
Monthly plans covering security updates, minor version upgrades, bug fixes and small improvements, so you never fall behind again.
Technologies we use
How we deliver
Free upgrade audit
We check your Symfony and PHP versions, bundles, dependencies, deprecation log and test coverage.
Upgrade roadmap
A version-by-version plan with risks, effort and a fixed price.
Prepare
Add tests where coverage is thin and resolve deprecations, using tools such as Rector to automate safe changes.
Upgrade step by step
Each major version is upgraded and tested before moving to the next.
Deploy and maintain
Release with monitoring, then optional monthly maintenance to keep you current.
Why CSNexa
Fixed-price clarity
Scope, timeline, and cost agreed before a single sprint — no surprise invoices.
Senior-only engineers
No junior bait-and-switch. Your project is led by architects with 10–15+ years in production software.
Global delivery
UK, US, UAE, Australia — timezone overlap, fluent English, Slack + Jira transparency.
NDA & full IP
You own 100% of source code, designs, and documentation on completion.
Frequently asked questions
Can you upgrade a very old Symfony application?
Yes. Older applications are upgraded one major version at a time, fixing deprecations and dependencies before each step. The audit tells you how many steps are needed.
Why not skip straight to the latest version?
Symfony is designed for gradual upgrades: deprecation warnings in one version show what will break in the next. Upgrading step by step keeps each change small, testable and safe.
Do you upgrade PHP at the same time?
Usually yes. Newer Symfony versions require newer PHP, so we plan PHP and dependency upgrades as part of the roadmap.
What if my application has no tests?
We add tests around the most important features before upgrading, so we can confirm behaviour stays the same after each step.
How much does a Symfony upgrade cost?
After the free upgrade audit we provide a fixed-price quote. Monthly maintenance plans are also available.
Do you work with clients in Europe?
Yes. We work with clients in the UK, Europe, the US and worldwide, with working-hour overlap for European time zones.
Clear scope and milestones before development starts.
15+ years building production software.
You own the code on completion.
Get a free estimate for Symfony Upgrades
Tell us about your project. We reply within 4 hours on business days with next steps and a fixed-price estimate.
Plan your Symfony upgrade
Book a free 30-minute scoping call. We respond within 4 hours on business days.