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Cardmarket.com

Staff Engineer - PHP API

Cardmarket.com
Germany · Full-time · Mid-Senior

Our Vision

Cardmarket is all about the people.

Our goal is that all people in the company come inspired to work, feel safe at work and return fulfilled at home. The most important part of our corporate culture is open communication, because only when we talk about problems, no matter how big or small, can we find a solution together.

Cardmarket connects people from all continents of the world, regardless of race, colour, ancestry, religion, national origin, gender or sexual orientation.

We treat all people the same way and expect the same from all our applicants. It is the different perspectives that make us strong as a Cardmarket Family and ready to go into the future together as a diverse and inclusive team.

Our public API acts as an alternate interface to our website for users to manage their stock/orders with a focus on business users with high volume transactions. While it has and is serving us well, it’s showing signs of its old age and competing for developer time with the website.

We want to establish a dedicated API Developer Team to revitalize and maintain it. The team will also work closely with our Support department for communication with our customer’s developers.

You will be the founding member of the API Team laying the foundation for future expansion of additional developers.

Your Responsibilities

  • Updating and maintaining our API implementation and associated Documentation
  • Manage the API's software architecture
    • Prepare the migration of our API to a modern framework
Your profile

  • Experience
    • 5+ years Software development
    • 2+ years PHP (recent)
    • 3+ years developing APIs (recent)
  • Interest in developing towards a team lead
Presence in Berlin is required!

OUR (current) TECH STACK

  • PHP 8.3
  • PHPUnit 12
  • MariaDB 10
  • MongoDB 6
  • Zend Framework

Note: This is our current tech stack. You will have the opportunity to set the direction of our API framework.

Why us?

  • A full-time position (39 hours) in our office in Berlin Prenzlauer Berg
  • 5 weeks paid vacation per year
  • Deutschland Ticket for local and long-distance public transport
  • Lunch at the company's expense (up to 7,50€ per working day) and free drinks and snacks in our offices
  • A relaxed company culture - everyone here is on first-name terms, from the intern to the CEO
  • A dynamic and hybrid workplace, including equipment of your choice
  • Flexible working times with core hours
  • Maximum enthusiasm for games - both "on the job" and beyond
  • Annual personal development budget of €1.500 per year for conferences, courses, books etc.
  • Women of Cardmarket Group
  • Cooperation with DearEmployee - anonymous psychological support for our employees
  • Membership at "Urban Sports Club"

Key Skills

Ranked by relevance

php
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Posted
Jan 06, 2026
Type
Full-time
Level
Mid-Senior
Location
Berlin

Industries

Software Development

Categories

Information Technology

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