We are looking for a senior/expert level  Senior Backend Engineer to join our team responsible for a high-performance GraphQL API (we are a SaaS product company). 

  • The main application you will be working on is a scalable, high performance API for supporting large scale ecommerce websites (thousands of API calls per second). 
  • The API has features for e.g., product catalogue, shopping cart and checkout. It is a rewrite of functionality in an existing application, that the same team is maintaining and migrating the functionality from piece by piece. 
  • The old application has grown organically with changing requirements, and we have decided to rewrite the API functionality from the ground up, with a changed architecture. 
  • We are implementing the main business logic as a GraphQL API written in PHP 8 on top of a MariaDB database. 
  • We use ElasticSearch and Redis and a lot of caching to produce an API that is very performant hard to kill. 
  • We will generate events using change data capture with Debezium and feed those through Kafka. On top of this, we are implementing a caching proxy as a Cloudflare Worker using TypeScript. 

Unique product

  • Headless e-commerce platform for fashion & lifestyle brands
  • A portfolio of clients from some of the most renowned fashion brands in Europe (ie. Chantelle, Stronger)
  • Secured a €10M series A funding round


Social benefits

  • Hybrid work culture (spend 50% of your week in the office and 50% where ever you like to work from )
  • Contract flexibility (contract of employment or B2B, you choose)
  • A team where you can run your own projects and be trusted with your work
  • Workation to leave the office for a couple of days or weeks and combine work with leisure
  • Possibility to travel and work between our Stockholm and Wroclaw offices
  • Bi-weekly massages in the office
  • Luxmed medical insurance plan to keep you healthy
  • Multisport Plus card and a pack of fitness buddies to join you on your journey to getting fit and strong



  • A non-hierarchical work-environment where you’ll have a lot of impact and space for growth
  • A budget for participating in educational programs, meet-ups, and other events related to your profession


We look for...

  • Someone ambitious. We are all ambitious and our goal is to build a world-class product
  • Good understanding of modern PHP 7/8 and modern programming in general
  • Passion for writing beautiful, minimalistic code that is easy to understand and maintain
  • Passion for performance and optimization. You need to understand how indexes work in SQL, how to create efficient queries and how to profile and debug your application
  • Strong analytical skills and problem solving skills in general
  • Team spirit and good eye for details (useful for code reviews!)

Our current stack:

  • Apps: PHP 7
  • APIs: GraphQL and REST APIs
  • Frontend: React, Redux
  • Databases: MariaDB / MySQL, ElasticSearch, Redis
  • Platform: AWS, Digital Ocean, Docker
  • Build Deploy Pipeline: Gitlab CI, Jenkins
  • Monitoring/Debugging: Grafana, Sentry.io

Packages and extras

  • Healthcare package
  • Healthcare package for families
  • Leisure package
  • Leisure package for families
  • Language courses
  • Conferences
  • Trainings
  • Financial bonus

Relocation package

  • Adaptation tips
  • Temporary housing
  • Help finding an apartment
  • Visa Services
  • Money for moving expenses
  • Open to Ukrainian candidates


  • Cold beverages
  • Hot beverages
  • Fruits
  • Snacks
  • Shower
  • Integration events



We are a tight-knit, young and professional team located in Poland and Sweden.

We’re shaping the future of e-commerce by building a tech-driven platform that enables Direct-to-Consumer and wholesale e-commerce brands to grow and accelerate globally. We are growing exponentially, and our application is battle- and stress-tested by some of the strongest brands in the business. With over 4 000 000 orders processed last year, and an ability to handle thousands of API calls every second, we aim to go even bigger – with zero limits ahead. We use Redis, Elasticsearch and a lot of caching to produce API endpoints that are performant and hard to kill. 

We are looking for people who want to have a real impact. Not only because of the fact, that our platform help with building milions of ecommerce shops - but also because we are trying to create a space where everyone can be heard - with their ideas, needs, comments. Who do their work with passion and look for a good place for development.
In Centra, we trust our employees, we give a lot of freedom in action, and at the same time - teamwork is very important to us.
We will provide you not only ability to work with new technologies, but also amazing atmosphere and time with great people - and it's not only vain promises, or publicity stunt (although our marketing department is also great 😉).