(Senior) Fullstack Software Engineer (m/w/d) – Credit Card Comparison Platform

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We are CHECK24 – the leading German comparison platform with 20 million customers and over 50 products in comparison. In our Credit Card team we deal with real‑world complexity: many banks, many credit card products, and very different technical requirements. The challenge is to transform all of that into a simple, fast, and fully digital comparison experience for our customers. Behind the scenes this involves handling complex bank integrations, processing large-scale data, building flexible application flows, and using AI‑assisted comparison to help customers find the best credit card for their needs – all running on a distributed microservice architecture that enables instant credit card applications without paperwork.

We are looking for a (Senior) Fullstack Software Engineer (m/w/d) (Java & React) to join our international, high-impact team at CHECK24 Vergleichsportal Karten & Konten GmbH in Munich. The role offers ownership over architecture and product direction, collaboration in a feedback-driven environment, and the freedom to explore modern tools, including AI-assisted development, to solve meaningful problems.

Job Description

• Design and evolve innovative services for our credit card comparison platform
• Take ownership of the full software lifecycle: design, implementation, deployment, and monitoring
• Build across the stack: front‑end (React), back‑end (Spring Boot), databases (PostgreSQL, MongoDB), and platform components such as MCP servers
• Integrate with complex third‑party systems, including banks and communication providers
• Translate business requirements into technical solutions with Product Owners
• Mentor peers through constructive code reviews, establish best practices, and share knowledge

Qualifications

• Degree in Computer Science, Natural Sciences, or equivalent technical field
• 5+ years professional experience in software development, ideally in agile environments
• Strong expertise in Spring Boot microservices and modern React frontends
• Skilled in CI/CD pipelines with Git, Maven, Jenkins, Docker
• Deep understanding of software architecture and clean code principles
• Enthusiastic about new technologies, hands‑on mentality, and proactive beyond code commit
• Good spoken and written knowledge of English (min. C1) – German is a plus

Additional Information

• Experience and stability: More than 25 years of successes and failures shared across the group in over 15 locations
• We value your commitment: Permanent contracts and an attractive compensation package with annual bonuses for outstanding performance, including vouchers for numerous CHECK24 products and special rates at partner fitness studios
• We support your growth: Personal training budget for conferences, books, and online courses of your choice
• The Checkito‑Spirit: Team events, networking opportunities, and legendary summer and Christmas parties are part of everyday work
• Food & Drinks: One free meal per day (breakfast or lunch), fresh fruits, and a wide selection of drinks anytime
• Sustainable mobility: Centrally located office enables easy commuting by public transport or bicycle, subsidized Germany Ticket, and company bike leasing options