> Markdown version of [/jobs/ext/3944306-senior-php-back-end-engineer-aws-mongodb-expert](https://www.wearedevelopers.com/jobs/ext/3944306-senior-php-back-end-engineer-aws-mongodb-expert). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior PHP Back-End Engineer | AWS & MongoDB Expert

- **Company:** Ailin
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** PHP (Programming Language), Amazon Web Services, Systems Engineering, MongoDB, Oop Languages, Backend, Microservices
- **Published:** October 27, 2026
- **Apply:** https://www.jobleads.com/es/job/senior-php-back-end-engineer-aws-mongodb-expert--madrid--e579bd7e381b8b33392a083c365032b0e

## About the Role

Ailin.health is seeking a Senior PHP Backend engineer with 5+ years of experience to join our Madrid team as a technical reference across projects. You will shape the backend stack, mentor teammates, and collaborate with a systems engineer to ensure performance, security, and reliability.

Responsibilities include applying solid OOP principles, integrating MongoDB and AWS services, and implementing robust authentication and authorization across microservices.

## Description

Ailin.health is seeking a Senior PHP Backend engineer with 5+ years of experience to join our Madrid team as a technical reference across projects. You will shape the backend stack, mentor teammates, and collaborate with a systems engineer to ensure performance, security, and reliability.

Responsibilities include applying solid OOP principles, integrating MongoDB and AWS services, and implementing robust authentication and authorization across microservices.