Senior Full-stack Engineer with TypeScript and Node.js

Join Complori as a Senior Full-stack Engineer

Complori, a Berlin-based EdTech startup, is on a mission to make the next generation future-proof by teaching kids essential 21st-century skills like coding, critical thinking, and technology literacy. We are looking for a Senior Full-stack Engineer to join our team and help us develop our adaptive and gamified web-based learning platform.

Your Mission

As a Senior Full-stack Engineer at Complori, you will:

• Lead the design and implementation of scalable, efficient solutions that meet business requirements and are forward-compatible.
• Develop high-quality code across the stack, maintaining and improving our learning platform and internal administrative tools.
• Efficiently deploy, scale, and maintain services to ensure uninterrupted service availability, robustness, and scalability.
• Engage in proactive problem-solving, addressing both current challenges and anticipating future needs.
• Maintain and evolve our tech stack, ensuring it aligns with our goals and software development best practices.

What We Are Looking For

• Minimum 7 years of professional experience developing performant, production-grade web applications and REST APIs.
• Deep understanding of TypeScript and functional programming principles.
• High proficiency in Node.js, React (Next.js or Vite), Firebase, and database management systems (NoSQL, SQL).
• Solid background in test-driven development using testing libraries and frameworks such as Jest, Vitest, Cypress, and Firebase Emulators.
• Strong knowledge of cloud architecture design patterns, infrastructure as code, CI/CD pipelines, containerization, and modern DevOps practices.
• Excellent spoken and written English.

Bonus Points

• Experience integrating monitoring and alert services such as Sentry, OpenTelemetry, Prometheus, Loki, or equivalent.
• Experience integrating complex 3rd party APIs.
• Experience with A/B testing, hypothesis building, and event-based analytics.
• Prior experience working in the e-commerce space.
• Prior experience in start-up environments.
• Located in Berlin and prefer a hybrid working environment.

Why Join Us?

• A start-up culture based on respect and trust, with flat hierarchies and opportunities to grow.
• Flexible working hours to adapt your work to your individual needs.
• A hybrid work mode with options for remote work across the EU.
• Mobility support with a subsidized Deutschlandticket for Berlin public transportation.
• Opportunities for personal and professional development through training, workshops, and conference participation.
• An office located in the vibrant heart of Berlin, a city full of culture, creativity, and exciting opportunities.
• Your choice of operating system (MacOS or Windows).
• Startup events as an integral part of our company culture, including summer and winter parties, team retreats, and other fun activities.

How to Apply

We are excited to receive your application with your CV. After our review, we will get in touch with you to schedule a 30-minute interview. In a second interview, you will meet one of the founders to provide you with a deeper insight into our company, vision, and goals. Based on the position, we may ask you to complete a short homework assignment, such as a coding challenge or a case study. In the next interview, you will meet your future direct supervisor and present the homework you completed. We will get back to you after a couple of days with our decision.

Join us at Complori and be part of a team that is shaping the future of education!