About Smart Working
At Smart Working, we believe your job should not only look right on paper but also feel right every day. This isn’t just another remote opportunity — it’s about finding where you truly belong, no matter where you are. From day one, you’re welcomed into a genuine community that values your growth and well-being.
Our mission is simple: to break down geographic barriers and connect skilled professionals with outstanding integral teams and products for full-time, long-term roles. We help you discover meaningful work with teams that invest in your success, where you’re empowered to grow personally and professionally.
Join one of the highest-rated workplaces on Glassdoor and experience what it means to thrive in a truly remote-first world.

Applicants must have the right to work in the country they are applying from and be able to work without employer sponsorship.
About the Role
As a Senior PHP/Symfony Engineer, you will take hands-on ownership of backend development within a mature Symfony platform that manages marketing and revenue data for enterprise customers.



The core application currently runs on Symfony 6.1, with an upgrade to Symfony 7 planned, alongside an Angular front end and TypeScript and Python AI agent microservices.
This is a strongly backend-weighted, senior hands-on engineering role requiring an architect mindset, strong independence and the ability to understand how technical decisions affect the wider system. You will work within a remote, cross-functional product squad alongside engineering, product, QA and DevOps colleagues.
Responsibilities
- Take ownership of backend development within the core Symfony application, becoming fully independent in delivering work within 2–3 months of joining.
- Review and critically assess code written by the team and AI tools, challenging proposed approaches and making sure key considerations have been properly addressed.
- Support the migration from Symfony 6.1 to Symfony 7 by resolving versioning

📌 Sr. PHP Symfony Engineer (Madrid)
🏢 Smart Working Solutions
📍 Madrid