Senior UX/UI Engineer
m/f/d,
For our client, a leading company in the Pharma industry in Kaiseraugst, we are currently looking for a Senior UX/UI Engineer
Background:
We are seeking a Senior UX/UI Engineer who possesses exceptional coding expertise and a profound understanding of user experience design. In this role, you'll be a key player in shaping our product's future, translating complex problems into elegant, intuitive, and high-performing
user interfaces that delight our users.
Tasks and Responsibilities:
- Architect, build, and maintain reliable, scalable, and beautifully crafted features for our core applications using React, TypeScript, and modern CSS.
- Be a key player in the entire design & development lifecycle from wireframing through to deployment and maintenance.
- Collaborate closely with product managers and backend engineers to transform complex requirements into clean, high-quality, and maintainable code.
- Integrate seamlessly with our REST APIs to deliver robust user facing features.
- Champion and evolve our frontend best practices, ensuring high standards for code quality, performance, accessibility, and testability.
Your Profile:
- 5+ years of professional experience building complex, user-facing web applications.
- Deep expertise in the modern JavaScript ecosystem, including React (Hooks, Context, State Management) and TypeScript.
- Proven experience in UI/UX design principles, with the ability to create wireframes or high-fidelity prototypes to guide development.
- A genuine passion for crafting exceptional, user-centric experiences within a complex environment. Willingness and drive to understand technical "business domains": you bring (end-user) experience in containerization & the Kubernetes ecosystem, e.g. because you were deploying frontend applications yourself using a Kubernetes cluster.
- Knowledgeable with CSS frameworks, preprocessors (e.g., Sass or Less), styled components.
- Familiarity with our core stack tools: ViteJS, TanStack Query, and Zustand.
- Experience with CI/CD pipelines (e.g., GitLab CI).
- Hands-on experience working with and integrating REST APIs effectively.
- Proficiency in writing meaningful, robust tests using frameworks like Vitest and React Testing Library.
- Excellent communication skills in English (German would be a plus) and collaboration skills.
Sounds like a great job?
Then we look forward to receiving your complete application documents through our online application form.
When applying by email, the sender agrees that his or her data will be used in accordance with our data privacy policy.
Find more vacancies at: coopers.ch
Job profile
- IT - Software Engineering
- Contracting
- Part Time, 80-100%
- ASAP - 10 Months
- JavaScript, React, Typescript, UX, UI

Sounds interesting?
Simply click "Apply now" and I will get back to you.
Giulia Viadana
Talent Acquisition Specialist
+41 61 633 30 66
giulia.viadana@coopers.ch