Senior Fullstack Engineer

freshcells systems engineering GmbH

Senior Fullstack Engineer at freshcells developing backend and frontend solutions with Node.js and React. Focus on collaborative coding, performance optimization, and innovation in software development.

Posted 4/13/2026full-timeDüsseldorf • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

AngularGraphQLJavaScriptNode.jsReactTypeScriptVue.js

About the role

Key responsibilities & impact

Develop and maintain backend APIs using Node.js/TypeScript
Implement complex frontend behaviors with React
Work across a shared, client-customizable codebase
Recognize emerging patterns, craft reusable abstractions, and refactor responsibly
Influence structure, testing, and performance in the codebase
Contribute to technical decision-making—not just execute tickets

Requirements

What you’ll need

Very good knowledge of Node.JS
Strong knowledge of ES 6 JavaScript as well as extensive knowledge of frameworks and libraries such as reactJS, vue.js and/or Angular
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

Benefits

Comp & perks

flexible work arrangements
professional development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsTypeScriptReactJavaScript ES6Vue.jsAngularrelational databasesnon-relational databasesGraphQLautomated software testing

Soft Skills

technical decision-makingcollaborationinfluenceproblem-solving