I met Daniel in 2014 at a meeting of the Berlin PHP User Group. The group was small that day, which led to an in-depth discussion about software development in the web environment. Today, I’m very glad about that, as we’ve now been working together for more than 15 months.
During this time, he has rebuilt a booking system for us based on EasyAdmin and Symfony 5.4, which conveniently covers all critical aspects from booking to invoicing and management.
Previously, our company processed orders using a contact form and a collection of Excel spreadsheets. The COVID-19 pandemic led to numerous reschedulings, making a modern and automated system necessary.
In its current phase, the system features our own API based on API Platform, as well as integrations with Easybill, Sendgrid, Dropbox, Google Calendar, and other systems. In addition to EasyAdmin and Symfony in our administrative backend, the customer portal utilizes Bootstrap and React. All of this makes our work much easier and more enjoyable, and we wouldn’t want to be without it.
Depending on the issue, we’ve communicated with Daniel via email, phone, video conference, or through a ticketing system, and we’ve always found good solutions. He offers a full range of services—from planning and architecture to development and operation of our web application—and we’re delighted that he’ll continue to support us.

Daniel Sippel spent two months supporting our team in the development of a new core feature for our website.

The workbench, where end customers can put together and later publish their print projects, was redeveloped using AngularJS on the front end and Symfony2 FOSRestBundle on the back end. I already knew Daniel from our time together at MyHammer—when he started at epubli, he had no experience with AngularJS. He taught himself how to use it during the implementation. He also impressed us with his backend skills. With his quick grasp of the material, he analyzed our old Zend Framework code and ensured that the new Workbench integrated seamlessly into the existing environment without losing any features.

In addition, he handled project management and used Scrum to ensure transparency within the team, which allowed the project to make good progress. It was also very helpful that he actively contributed to the design process and advised and supported our product owner with his expertise. Daniel worked independently and always proactively kept me updated on the current status, so in the end, there were no shortcomings in terms of either quality or quantity. I am completely satisfied with the work he did and can recommend him without reservation.

Daniel Sippel supported our team in Symfony 2 backend development from December 2014 through July 2015. He has a very strong knowledge of Symfony and PHP, is reliable, and works independently. As a true member of our team, he used his deep understanding of APIs—both server-side (FOSRestBundle) and client-side—to get things done. He was also the lead developer of our internal admin interface, built using the SonataAdminBundle. He takes a highly solution-oriented approach and communicates effectively with other departments and product owners.