Senior TypeScript Full Stack Developer (all)

Festanstellung, Vollzeit · Berlin, Remote, Luxembourg, Hamburg

Let me introduce...

With Sonia, doctors are successful doctors. We create and deploy AI enhanced solutions that make doctors’ lives easier, patients’ care better, and healthcare systems more efficient. If you’re proactive, impact-driven, and ready to shape the future of healthcare, join us.

This is what you’ll own

We’re looking for a Senior Full-Stack Engineer (all) to help us build modern, high-performing web applications. You’ll play a key role in shaping our architecture, mentoring team members, and contributing to the scalability of our product.

Design and implement robust, scalable full-stack web applications
Write clean, maintainable, and testable code following best practices
Collaborate on architecture decisions and long-term technical planning
Optimize application performance and improve system reliability
Mentor junior developers and support their growth
Conduct code reviews and share constructive feedback
Contribute to technical documentation and knowledge sharing

You’ll thrive in this role if you bring

8+ years of professional software development experience
Strong expertise in TypeScript / JavaScript and Node.js
Proven experience with React and modern front-end development
Solid understanding of full-stack development principles
Hands-on experience with ORM tools, especially Prisma
Experience in backend development with Node.js
Familiarity with RESTful API design and implementation
Understanding of CI/CD pipelines
Proficiency with Git version control
Experience with database design and data modeling

Nice to Have

Experience with Remix.run or other server-side rendering (SSR) frameworks
Familiarity with Chakra UI
Experience with testing frameworks (e.g., Playwright, Vitest)

Why you’ll love working with us

An engineering-driven culture with modern tools and clean code practices
A product-focused environment where quality and performance matter
A collaborative team that values learning, pragmatism, and ownership
Attractive compensation aligned with your skills
Flexible work arrangements
30 days of vacation per year

Ready to apply?

If you enjoy building meaningful relationships, driving customer satisfaction, and contributing to the transformation of healthcare, we’d love to hear from you!

I'm Margarita and will be guiding you through the application process.

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About us

At Sonia, we’re building more than just a product — we’re building a team that helps doctors succeed with the power of AI. To grow and shape the future of healthcare, we’re looking for people who want to create, challenge, and collaborate — and have fun while doing it.

We believe teams thrive when different perspectives come together and work toward a shared goal. We welcome and respect everyone for who they are, regardless of origin, gender, age, religion, disability, or sexual identity. We’re excited to meet people from all backgrounds who want to bring their unique perspective to our mission.

Are you in?

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Wir freuen uns auf Dich!

Wir freuen uns über dein Interesse an der Demo Daten GmbH. Bitte fülle das folgende kurze Formular aus. Solltest du Schwierigkeiten mit dem Upload deiner Daten haben, wende dich gerne per E-Mail an career@sonia.so.