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Description

Senior Full Stack Engineer (all) - TypeScript

Department: Tech

Employment Type: Permanent employee

Schedule: Full-time

Seniority: Experienced

Location: Berlin, Remote, Luxembourg, Hamburg, Frankfurt

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.

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.

This role can be performed in a hybrid setup from our offices in Luxembourg or Berlin, or remotely from anywhere in Germany or Luxembourg.

Application Development: Design and implement robust, scalable full-stack web applications.
Code Quality: Write clean, maintainable, and testable code following best practices.
Architecture: Collaborate on architecture decisions and long-term technical planning.
Performance: Optimize application performance and improve system reliability.
Mentorship: Mentor junior developers and support their growth.
Review & Feedback: Conduct code reviews and share constructive feedback.
Documentation: Contribute to technical documentation and knowledge sharing.

Must Haves

Experience: 8+ years of professional software development experience.
Core Expertise: Strong expertise in TypeScript / JavaScript and Node.js.
Frontend: Proven experience with React and modern front-end development.
Fundamentals: Solid understanding of full-stack development principles.
Database Layer: Hands-on experience with ORM tools, especially Prisma.
Backend: Experience in backend development with Node.js.
APIs: Familiarity with RESTful API design and implementation.
DevOps Foundation: Understanding of CI/CD pipelines.
Version Control: Proficiency with Git version control.
Data Modeling: Experience with database design and data modeling.

Nice to Have

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

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.
The chance to work on products that directly shape the future of healthcare.

If you enjoy building meaningful applications, driving technical excellence, 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.

Sonia Solutions

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Frequently Asked Questions

We prioritize job seekers as our customers, unlike bigger job sites, by charging a small fee to provide them with curated access to the best companies and up-to-date jobs. This focus allows us to deliver a more personalized and effective job search experience.
We've got over 200,000 jobs from 15,000+ vetted companies. No fake or sleazy jobs here!
We aggregate jobs from 15,000+ companies' career pages, so you can be sure that you're getting the most up-to-date and relevant jobs.
We're the only job board *for* software engineers, *by* software engineers… in case you needed a reminder! We add thousands of new jobs daily and offer powerful search filters just for you. 🛠️
Every single hour! We add 2,000-3,000 new jobs daily, so you'll always have fresh opportunities. 🚀
Typically, job searches take 3-6 months. EchoJobs helps you spend more time applying and less time hunting. 🎯
Check daily! We're always updating with new jobs. Set up job alerts for even quicker access. 📅

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