Senior Frontend Engineer (m/w/d) React, Kafka, Kotlin

Millions of shopping decisions rely on data flowing reliably through idealo's platform every day. In this role, you'll build and evolve the systems that enable our marketing channels with high-quality product and offer data, ensure accurate billing of paid traffic, and provide reliable tracking that makes marketing initiatives measurable.

You'll work across the full stack using Kotlin, TypeScript, React, Kafka and AWS while taking ownership of services from design to production. When a feature goes live and runs smoothly, you see the direct impact of your work.

About your new role

• Lead the development of our latest frontend application while contributing across the full stack.

• Design, implement and maintain robust, scalable microservices using Kotlin, TypeScript and related technologies.

• Take end-to-end ownership of your services - from architecture and implementation to deployment, monitoring and continuous improvement.

• Shape our technical direction through architecture decisions, technical design reviews and the long-term evolution of our platform.

• Improve our engineering platform by advancing CI/CD pipelines, observability and Infrastructure as Code practices.

• Collaborate closely with marketing and engineering teams across idealo to deliver reliable tracking and billing systems while continuously raising engineering quality through clean code, testing, pair programming, code reviews, mentoring and knowledge sharing.

Skills & Requirements

• Several years of professional experience in frontend development with TypeScript/JavaScript and backend development with Kotlin .

• Solid experience with React, Next. js, Spring Boot and building RESTful APIs.

• Experience with event-driven architectures , Kafka and messaging patterns. Experience operating these systems in production is a strong plus.

• Hands-on experience working with Kubernetes, AWS and Infrastructure as Code tools such as AWS CDK or Terraform, alongside modern CI/CD practices.

• You take ownership and independently drive topics forward.

• The confidence to speak up and challenge ideas constructively, paired with openness to diverse perspectives.

At idealo you can expect

• You want to further your education? We take your personal development goals seriously and, in addition to our idealo Learning Hub, eLearning offerings (e.g., Udemy), coaching & mediation, we also offer you the opportunity to benefit individually from additional learning and development budget.

• And what about the office? Our office in the heart of Berlin offers free organic breakfast, excellent free lunch (vegan and vegetarian), as well as free coffee, lemonades and after-work beer, in addition to the "standard foosball". It also has a fabulous rooftop terrace with view of the whole of berlin where you can network with colleagues from our group of companies.

• In need of additional support in any areas of your life? We offer free counseling and support in all areas of life (professional, private, family, health, etc.) in cooperation with the pme-Familienservice .

• You want full flexibility on your way to work and beyond? No problem with a job bike or Deutschlandticket - and it's environmentally friendly, too!

• Want to keep yourself fit? We offer many different fitness and sports options, such as an Urban Sports or Gympass membership, to suit your personal needs.

• And what else is there? Of course, success must be celebrated! In addition to team events, you can also expect big company events and other moments of organized connection with others in the company and your team throughout the year!

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