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Senior Fullstack Developer; H​/U​/M​/A​/N

Online/Außer Haus - Idealerweise für Kandidaten in
40210, Düsseldorf, Nordrhein-Westfalen, Deutschland
Unternehmen: freshcells systems engineering GmbH
Vollzeit, Fernarbeit/Heimarbeit position
Verfasst am 2026-01-21
Berufliche Spezialisierung:
  • Software Entwicklung
    Full Stack Entwickler, Software-Ingenieur, Java Entwicklung, Frontend Entwicklung
Stellenbeschreibung
Stellenbezeichnung: Senior Fullstack Developer (H/U/M/A/N) full-time

Join to apply for the Senior Fullstack Developer (H/U/M/A/N) full-time role at fresh cells systems engineering GmbH

fresh cells systems engineering GmbH is a software service provider based in Düsseldorf with a dynamic team of over 40 creative experts from various fields. We focus on authenticity, individual talent development and open communication. We build on respect, trust and responsibility. As an innovation-driven company, we invest in new ideas. We know that the best results are achieved as a team.

We make mistakes, but we learn from them. We are open and courageous for new ways.

Join us on our exciting journey in what is probably the most important and forward-looking area - software development - as a Senior Fullstack Developer (m/f/d) in full-time onsite or remote.

Responsibilities
  • Development of modern backend applications based on Node.

    Js
  • Development of modern frontend applications based on React JS
  • Development of APIs based on GraphQL
  • 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
Qualifications
  • Very good knowledge of Node.

    JS
  • Strong knowledge of ES 6 JavaScript as well as extensive knowledge of frameworks and libraries such as react

    JS, vue.js and/or Angular
  • Experience of PHP, ideally with frameworks such as Symfony, Laravel or Yii
  • Sound experience with relational or non-relational databases
  • Good knowledge of data structure design
  • 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 Kubernetes, Open Shift, or Docker Swarm
  • Knowledge of designing and adapting software to be twelve factor applications
  • Knowledge of continuous integration via tools like Jenkins
  • Experience with Next.js
  • Experience with Type Script
We offer
  • Flex time for early risers and night owls
  • Flexible home office days
  • Company pension scheme with employer contribution
  • Subsidy for the "Deutschlandticket"
  • Advantage portal with offers in online stores and branches of various brands
  • High-end equipment for private use too
  • A secure and long-term workplace
  • Regular feedback, team meetings & retrospectives
  • Room for your own ideas and personal development
  • Digital training courses, freely available to every employee
  • Support with relocating processes, as well as free German courses for newcomers
  • Joint activities such as summer and winter parties, monthly company breakfast, etc.
  • A dog-friendly working environment

All people are welcome here, regardless of gender, age, sexual identity, origin, religion, ideology, with or without a disability. The main thing is that you fit in with us.

Important note

Please be advised that a valid work permit for Germany is required for non-EU citizens. Unfortunately, applications without a valid work permit and sufficient German language skills may not be considered.

Seniority level
  • Mid-Senior level
Employment type
  • Full-time
Job function
  • Engineering and Information Technology
Industries
  • Software Development

Cologne, North Rhine-Westphalia, Germany

#J-18808-Ljbffr
Stellen-Anforderungen
10+ Jahre Berufserfahrung
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