(Senior) PHP Softwareentwickler Backend (m/f/d) Parking Products

  • starting immediately
  • Cologne (Mediapark)
  • Permanent
  • Full-time

We are: THE experts of the first hours around domains. We have more than 20 years of experience in e-commerce and we work in interdisciplinary teams every day to create the best possible user experience for more than 2 million customers worldwide. Our common goal? Success that is sustainable! The IONOS group provides support in the background to achieve this goal.


Backend feels like home to you and you don't have to google "domain parking"? Writing clean code is important to you? The optimization of demanding applications within a complex high-load system, where every faster ms counts, appeals to you? Then join our parking team consisting of experienced developers, testers and product owners in close cooperation with analysts and take full technical responsibility for the success of our parking product!

Our technology stack:

  • We use PHP 7, Kubernetes, nginx, Lua, OpenResty, HAProxy for our parking application.
  • Our backends and jobs are based on PHP, MySQL and Scribe. Furthermore we use Prometheus, Grafana, Elasticsearch and Kibana.
  • Additionally, we integrate with other products using the APIs of the providers (e.g. Google Cloud Platform or Salesforce).
  • We are into clean code, have a uniform codestyle that we discuss a lot and develop together.
  • A high code quality is extremely important to us. We therefore take our test code just as seriously as our production code.
  • We have a centralized continuous delivery system with a net and a double bottom, which we use to roll out new software to our customers several times a day. With one click!

Your tasks:

  • Design and development of new and enhancement of existing features to solve challenging customer requirements
  • Defense against recurring external and complex DDos attacks
  • Permanent and consistent optimization of our parking algorithms
  • Participation in the design of our software architectures and the selection of technologies
  • Active participation in agile work processes

Your profile:

  • Interested in new technologies; using and growing with our existing tech stack
  • Several years of in-depth experience in PHP backend development
  • A sense of responsibility, teamwork, pragmatism, creativity and reliability
  • Fluent German and English skills
  • Successfully completed studies in computer science / business informatics or a comparable qualification

Our benefits for you:

  • Work-life balance: trust-based working hours, home office, 30-day vacation entitlement, fitness offers
  • Environmentally friendly way to work: employer-financed Deutschland job ticket
  • Free choice of hardware: MacBook Pro or Dell notebook
  • Top offices: central location in the Mediapark and freshly renovated rooms with latest equipment
  • Personal development: individual training agreements
  • Attractive employee discounts: corporate benefits, ticketsprinter
  • Refreshments: coffee / tea / water, fresh fruits
  • Company events: summer, Christmas and team events
  • Rock-solid job in future proofed industry!


Sedo GmbH

Sami Khanal

Human Resources

Im Mediapark 6B

50670 Köln

Tel: +49 221 340 30 290

Web: www.sedo.de