JavaScript Fullstack Developer (m/f/d) at OpenXchange AG

Olpe, North Rhine-Westphalia, Germany -

Full Time

Start Date

Immediate

Expiry Date

15 Oct, 26

Salary

0.0

Posted On

17 Jul, 26

Experience

2 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

JavaScript, Node.js, Kubernetes, CI/CD, Automated Testing, MariaDB, PostgreSQL, Vue.js, Microservices, Cloud-Native Architecture, UI Design, UX Design, API Design, Accessibility Standards, German, English

Industry

Software Development

Description

Our mission: At Open-Xchange (OX), we build OX App Suite, a modern web application for email and groupware trusted by millions of users worldwide. As a core part of our open-source portfolio, it enables secure digital communication and collaboration. As the global leader in open-source email and collaboration software, we develop solutions for enterprises, service providers, and public sector organizations around the world. Our software also plays a key role in advancing digital sovereignty across Europe, powering initiatives such as OpenDesk and deployments for the State of Schleswig-Holstein. Discover what OX offers you: We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company’s success and customer value. We value expertise and continuous professional development. Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills. Openness and diversity are core to OX. Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture. Your team: You'll join the team behind OX App Suite, helping to build and evolve one of the world's leading open-source email and collaboration platforms. Your new job: Full-Stack Development with JavaScript/Node.js: Join the team behind OX App Suite and help shape the future of one of the world's leading open-source collaboration platforms. We work remotely across Germany with a high level of ownership and autonomy. Rather than following rigid role boundaries, we take collective responsibility for the entire development lifecycle—from architecture and implementation to testing, quality assurance, and deployment. Cloud-Native Development with Kubernetes: Our platform runs as a distributed application on Kubernetes, serving millions of users across customer environments as well as our own cloud infrastructure. Quality, Automation & Developer Tooling: CI/CD, automated testing, code reviews, agentic coding, and long-term maintenance are an integral part of how we work. We believe quality is built into the development process—not added afterwards. This is the tech stack you'll be working with: Your background: Master's degree in Computer Science, Software Engineering, or a related field. Strong knowledge of JavaScript and modern web architectures. Experience with CI/CD pipelines and automated testing. Experience working with relational databases such as MariaDB or PostgreSQL. Passion for designing intuitive APIs and user interfaces with a strong focus on usability. Ability to communicate technical concepts clearly, contribute ideas, and collaborate effectively within a development team. Fluent German and solid English communication skills. Nice to Have: Experience with Vue.js, especially its reactivity system. Experience with microservices, Kubernetes, container technologies, and cloud-native architectures. A strong eye for UI design and user experience (UX). Knowledge of accessibility standards and inclusive software design. This is what you get at OX: The flexibility to work 100% remotely or from one of our offices ensures a work environment that suits you best. Flexible working hours that allow you to successfully combine your home and family responsibilities with work. Continuous opportunities for professional and personal growth through learning, collaboration, and working in an international team. Getting together in-person for workshops and fun team events. Time off to volunteer – and mental health support when you need it. Attractive benefits, including digital meal vouchers, corporate discounts, subsidies for ergonomic home office equipment, Urban Sports membership, bike leasing, and a company pension plan. Join the team: Join us in our fight for an open internet and deliver added value! Click “Apply now” to submit your application. Your contact person: Reach out to Justin (recruiting@open-xchange.com) from the People Team. He will be able to discuss current opportunities and tell you more about our exciting vision and mission @OX.

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Responsibilities

Develop and evolve the OX App Suite using JavaScript and Node.js within a cloud-native Kubernetes environment. Take collective responsibility for the entire development lifecycle, including architecture, implementation, testing, and deployment.