I am a Tech Lead of a leading open source product.I have 11+ years experience of Web technologies, mainly on PHP and Mysql.
My main responsibilities for OrangeHRM is to design add-on's for HR needs and managing development teams and contributors of OrangeHRM all over the world.
We have used following technologies to improve the OrangeHRM open source product
1. Symfony Web framework
2. Doctrine ORM framework
3. Test Driven Development
4. Agile Development