Senior Full-Stack Developer

cofenster GmbH; Hamburg; Vor Ort; EUR 65.000 - 85.000; Vollzeit

Zusammenfassung

A technology company in Hamburg is seeking a Senior Full-Stack Developer to join their product team. You will design impactful features, maintain existing systems, and ensure technology scalability. A minimum of 5 years experience with JavaScript and backend technologies is needed. The role supports career development with a remote-first culture and wellness benefits.

Leistungen

Growth Opportunities

Wellness Benefits

Flexible Work Culture

Qualifikationen

• 5+ years of experience in designing and building interfaces with code.
• Proficiency in JavaScript, including TypeScript.
• Comfort in backend technologies such as GraphQL, Prisma, and AWS.

Aufgaben

• Design and build impactful new features for AI agents.
• Refactor codebase and implement innovative solutions.
• Champion accessibility to improve product usability.

Kenntnisse

JavaScript (preferably TypeScript)

Digital accessibility knowledge

HTML, CSS, accessibility, interface design

Backend technologies (GraphQL, Prisma, AWS)

Automated testing (Jest, Cypress)

Agile team experience

Tools

APIs

React

Node.js

Angular

.NET

Jobbeschreibung

At cofenster our mission is clear : Everyone in an organization should be able to create professional videos easily.

With our latest innovation the AI video agents were setting a new benchmark in video creation.

Our AI agents automatically analyze and transform long videos into high-quality highlight clips or turn documents into professional-looking videos optimized for platforms like TikTok and Instagram. Specifically designed for enterprises our AI video agents are the first solution that meets the complex customization needs of large organizations.

As a Senior Full-Stack Developer you’ll join our cross-functional product team working on the core cofenster platform. You’ll be involved in developing exciting new features, maintaining and improving our existing systems and ensuring our technology remains scalable, accessible and reliable.

Our growth speaks for itself and we’re ready to go even further.

That’s where you come in!

Tasks

• Shape the future of our AI agents by designing and building impactful new features
• Strengthen our codebase through smart refactoring, innovative solutions and continuous improvements that make our platform more robust and scalable
• Champion accessibility ensuring everyone – including people with disabilities – can use cofenster effectively
• Drive excellence in key engineering areas like security, performance, testability and overall product performance
• Collaborate closely with a passionate cross‑functional team of designers, product managers and our customer success team to turn bold ideas into reality and deliver impactful user experiences

Requirements

• Proficiency in JavaScript (preferably TypeScript) as it is used from frontend to backend as well as part of infrastructure
• An eye for product design including knowledge of digital accessibility in order to keep improving our product for all our customers
• At least 5 years of experience designing and building interfaces with code (HTML, CSS, accessibility, interface design)
• Comfort in backend technologies such as GraphQL, Prisma and AWS
• Experience with automated testing in order to contribute to the development of our QA pipeline (for instance Jest, Cypress or other testing frameworks)
• Ability to work efficiently in an agile team ideally with some experience having worked on a SaaS product before

Benefits

• Growth Opportunities: A dedicated budget for training, coaching and personal development to support your career progression.
• Wellness Benefits: Enjoy a membership to the Urban Sports Club to support your health and well‑being.
• Flexible Work Culture: Embrace a remote‑first approach with two off‑site retreats each year across Europe.

Interested in this exciting opportunity? Contact us today to explore how you can shape the future of AI in video production!

Key Skills

APIs, REST, Spring, SOAP, .NET, React, Node.js, Angular, J2EE, JavaScript, Web Services, Java