Senior Software Engineer - Python - English

Team CRM Tech is responsible for delivering the technical infrastructure that enables idealo's CRM campaigns. We build and maintain systems that handle identity resolution, subscriptions, data flows, and message delivery, while ensuring GDPR compliance and supporting personalized user experiences. In Team CRM Tech, Data Engineers and Software Engineers collaborate closely to build end-to-end solutions that connect data pipelines, APIs, and user interactions.

We are currently looking for a Senior Software Engineer with strong expertise in backend engineering, but also has an affinity for data concerns.
This role requires solid experience with distributed systems, event-driven design, and cloud-based architectures. You will contribute to how CRM Tech structures, processes, and exposes data across multiple systems and domains. Our subdomains such as Subscription Management and Messaging demand excellent software engineering skills, focusing on service reliability, scalability, and integration with customer-facing products.
This is an exciting opportunity to drive the improvement of our core CRM Tech data and streaming products as well as APIs, and help shape idealo’s retention strategy through reliable and scalable solutions.
Our systems are built on a modern, event-driven architecture using Kafka and microservices written in Java as well as serverless architecture . We rely on AWS , using tools like Redshift/Snowflake, Glue, and S3 for data processing and storage, and manage our infrastructure through AWS CDK in TypeScript . We own the full lifecycle of our services – from data ingestion and transformation to activation in CRM campaigns.
Join us and help us make CRM campaigns a first-class product at idealo.

About your new role

• Design, implement, and maintain reliable and scalable software systems and data flows for CRM and user engagement use cases.
• Collaborate with Data Engineers, Product Managers, and other stakeholders to deliver robust solutions that integrate across domains and teams.
• Contribute to the team’s architecture and technical decision-making, ensuring high code quality and operational excellence.
• Take ownership of services throughout their lifecycle, from design and implementation to monitoring and improvement.
• Ensure best practices for testing, CI/CD, and cloud infrastructure are applied and continuously improved.
• Support and mentor less experienced engineers by sharing knowledge, conducting code reviews, and fostering a collaborative team culture.
• Explore and adopt new tools and technologies to improve development efficiency and system performance.

Skills & Requirements

Tech Skills

• Strong experience in backend development with Java (Spring Boot) or Kotlin ; experience with TypeScript is a plus.
• Solid understanding of cloud-based architectures , preferably on AWS (e.g. Lambda, S3, Redshift, Glue, SNS/SQS).
• Familiarity with event-driven systems and tools such as Kafka , as well as microservice architectures .
• Experience working with data pipelines , APIs, and data integration processes (schemas, transformations, ETL).
• Hands-on experience with CI/CD pipelines , infrastructure as code (e.g. AWS CDK, Terraform), and monitoring.
• Good knowledge of SQL and experience handling structured and semi-structured data.
• Experience with Python or data engineering tools is a plus.

Mindset & Collaboration

• You are proactive, take ownership, and thrive in collaborative, cross-functional teams.
• You combine hands-on coding with an eye for architecture, system design, and scalability.
• You care about code quality, maintainability, and continuous improvement.
• You enjoy mentoring and supporting your peers while continuing to grow your own expertise.
• You communicate clearly and confidently in English, both technically and interpersonally.

At idealo you can expect

• You need vacation? We offer you 30 days of vacation. Not enough? You can "buy" an additional 15 days every year by converting your salary and it's seen as a positive thing.
• 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 excellent free lunch, 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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