Senior Full Stack Developer PHP (m/f/d) full-time

Festanstellung, Vollzeit · Düsseldorf

Your mission

Development of modern frontend applications based on ReactJS, Next.js and TypeScript
Development of APIs based on GraphQL
Development of modern backend applications based on Node.js and PHP Symfony
Design and implementation of new features for sophisticated software solutions in cooperation with project management, design, and development departments
Writing and maintaining our automated test suites
Participation in continuous improvement processes

Your profile

Very good knowledge of modern JavaScript (ES6 and above) and/or TypeScript
Very good knowledge with Next.js
Extensive knowledge of frontend frameworks and libraries such as ReactJS
Good knowledge of modern PHP (v8 and above)
Good knowledge of PHP frameworks and libraries such as Symfony and/or Laravel
Sound experience with relational databases
Good understanding of established and evolving Web APIs
Competences in consuming and creating web services based on REST and especially GraphQL
Know-how in performance optimization
Basic knowledge of HTML and CSS is helpful
Experience with agile development in a team
Hands-on experience with automated software testing
Basic knowledge in API security
Fluent in English

Nice to have

Experience with containerization technologies such as Docker
Experience with container orchestration tools like, i.a., Kubernetes, OpenShift, or Docker Swarm
Knowledge of designing and adapting software according to the twelve-factor methodology
Knowledge of continuous integration via tools like bitbucket or Jenkins
Experience with Object-relational mapping, e.g. using Doctrine in PHP
Experience with headless CMS such as Strapi
Experience with PostgreSQL
Experience with Apollo Federation
Experience with the integration of Analytics tools like GA4, GTM, amplitude and/or Matomo

Why us?

freshcells systems engineering GmbH is a software service provider based in Düsseldorf with a dynamic team of over 50 creative experts from various disciplines. At freshcells, authenticity, individual talent development, and open communication are at the heart of everything we do. We rely on respect, trust, and responsibility. As an innovation-driven company, we continuously invest in new ideas. We know the best results come from teamwork. Mistakes happen—but we learn from them. We are open and courageous when it comes to exploring new paths. Join us on our exciting journey in one of the most significant and future-shaping fields – software development – as a Senior Full Stack Developer PHP (M/E/N/S/C/H)!

What we offer you:

Flexible working hours for early birds and night owls
Dog-friendly work environment
A secure and long-term position
Company pension plan with employer contributions
Regular exchange, feedback sessions, team meetings, and retrospectives
Monthly company breakfast
Room for your own ideas and personal development
Free access to digital learning platforms for all employees
Subsidy for Urban Sports Club membership
Subsidy for the Germany Ticket (Deutschlandticket)
Bike leasing via JobRad
Support with relocation processes
Free German language courses for newcomers

Everyone is welcome at freshcells, regardless of gender, age, sexual identity, background, religion, beliefs, or disability. What matters most is that you’re the right fit for our team.

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About us

What can you expect at freshcells?

Designing, developing, and maintaining e-commerce applications is our business. Cutting-edge technologies, customers who want more than average, and a fun, vibrant team of over 40 web experts aged 20 to 50+ from five countries – plus seven office dogs. We also have a stylish office and rec room on the spacious premises of a former carpet factory in the heart of Dusseldorf.

We are vibrant and want to stay that way, and we always look forward to welcoming new colleagues. You should be able to communicate in English. German would be an advantage, but it’s not necessarily required. We are not a hire-and-fire company; we prefer to quench our thirst with a cold drink after work. You’d make a great addition to our team? Then check out our current vacancies to see where we’re currently expanding.

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Wir freuen uns, von dir zu hören!

Vielen Dank für Ihr Interesse an der freshcells systems engineering GmbH. Bitte füllen Sie das folgende Kurzformular aus. Sollten Sie Schwierigkeiten mit dem Upload Ihrer Daten haben, senden Sie bitte eine E-Mail an recruiting@freshcells.de.