(Senior) QA Engineer - Backend (x/f/m)

dkbcodefactory; Berlin; On-site; EUR 60,000 - 85,000; Full time

Job summary

DKB AG, with Code Factory (CoFa) as its agile sister tech partner, seeks a QA Engineer to shape the testing strategy for our backend systems and to build and maintain automated tests for APIs and microservices.

You will integrate tests into CI/CD pipelines, analyze results, and drive improvements in our testing framework. Proficiency in Java and Serenity BDD is preferred, plus solid knowledge of distributed backend architectures.

Qualifications

• Completed degree in a STEM field, equivalent training, or relevant practical QA experience.
• Solid experience in test automation with maintainable, scalable test suites.
• Practical programming in Java; Serenity BDD is a plus or willingness to learn it.
• Familiarity with testing APIs and microservices in distributed backends.
• Experience with event-driven architectures; Kafka or similar.
• Experience with CI/CD pipelines and integrating tests into delivery processes.
• Ability to identify risks, challenge coverage, and suggest improvements.
• Independent, organized, and solution-oriented work style.
• Strong communication of technical topics with diverse stakeholders.

Responsibilities

• Develop a testing strategy for backend systems with product teams.
• Design, implement, and maintain automated tests for APIs and microservices.
• Decide testing scope across unit, API/integration, and end-to-end levels.
• Integrate automated tests into CI/CD pipelines and analyze results.
• Debug failing tests and improve test frameworks and processes.
• Contribute to quality engineering efforts and identify testing risks.
• Collaborate with developers, product owners, and business teams to embed quality.
• Communicate testing concepts clearly to stakeholders.

Skills

Test automation

API testing

QA mindset

CI/CD collaboration

Stakeholder communication

Education

STEM degree or equivalent training

Tools

Java

Serenity BDD

Apache Kafka

Job description

Welcome to DKB AG.... We're excited to share that our hiring process is now led by Code Factory (CoFa), DKB's sister tech company, bringing a more agile and collaborative approach to building our cross-functional teams. While you'll go through the hiring journey with CoFa, your employment will be with DKB, combining the stability of a leading bank with the speed and innovation of a tech-driven environment. Join us to be part of a team where collaboration and impact come first.

Responsibilities

• You work with developers and product teams to develop a suitable testing strategy for our backend systems and ensure sensible test coverage across different testing levels.
• You design, implement, and maintain automated tests for our APIs and microservices, ensuring that our test automation remains stable and maintainable as complexity grows.
• You decide which tests make sense at the unit, API/integration, or end-to-end level, and help avoid duplication between testing levels.
• You integrate automated tests into our CI/CD pipelines, analyze test results, and help identify errors and quality risks early in the development process.
• You analyze and debug failed and unstable tests, and continuously improve existing test frameworks and processes.
• You actively contribute to our quality engineering efforts, identify quality risks with the team, and decide where test automation adds real value.
• You work closely with developers, product owners, business teams, and other QA engineers, making quality a shared part of product development.

Qualifications

• You have a completed degree in a STEM field, equivalent training, or relevant practical experience in software development or quality assurance.
• You have solid experience in test automation and can structure it to remain maintainable, reliable, and scalable over the long term.
• You have practical programming experience with Java and write readable, maintainable test code. Experience with Serenity BDD is a plus; alternatively, you're willing to learn it.
• You're familiar with testing APIs and microservices and have a good understanding of distributed backend systems and synchronous and asynchronous communication.
• You're familiar with the fundamentals of event-driven architectures; ideally, you've already worked with Apache Kafka or similar technologies.
• You have experience with CI/CD pipelines and understand how automated tests are integrated into the development and delivery process.
• To you, quality means more than running test cases: you identify risks, question existing test coverage, and contribute ideas to improve our testing strategy and automation.
• You work independently, in an organized and solution-oriented way, and enjoy learning about new technologies and subject areas.
• You communicate technical and quality-related topics confidently with different stakeholders and ad