About Me
Hi, I'm Tim Rutana
Software Developer
I'm an experienced Senior Software Developer with deep expertise in backend development using Java, and growing skills in frontend development with React. I'm passionate about clean code, modernizing complex legacy systems, and building robust test suites that support fast, confident delivery. I also serve as a Scrum Master and Agile Coach, helping teams adopt Agile practices and ship better software. On top of that, I actively contribute to hiring and onboarding, helping to grow high-performing teams. Always curious and eager to improve, I'm committed to continuous learning and staying on top of evolving technologies and practices.
Technical Skills
A snapshot of the technologies and methodologies I work with.
Programming Languages
Java, TypeScript, JavaScript, Kotlin.
Frameworks & Libraries
Spring, Spring Boot, ReactJS, JUnit, Mockito.
Tools & Software
Git, Docker, Kubernetes, Jenkins, Gradle, Maven, Tomcat, Splunk.
Methodologies & Practices
Agile Development, Pair Programming, Test Driven Development (TDD), Clean Code, Clean Architecture, Coaching.
Work Experience
A summary of my professional journey and key roles.
Senior Software Developer at SAP SE
2018 - Present
Backend-focused developer working on SAP SuccessFactors, a leading cloud-based HR system. Led efforts to modularize a monolithic architecture, improve test coverage, and advocate Clean Code and Test-Driven Development. Also served as Scrum Master and Agile Coach, supporting Agile transformations and coaching teams. Actively involved in hiring, onboarding, and internal knowledge sharing through lightning talks and technical sessions.
Software Developer at MediaMarkt | Saturn (Media Saturn IT-Services GmbH)
2017 - 2018
Contributed to a large-scale e-commerce platform and internal CMS using Java, Spring Boot, Angular, and React, all within a microservices architecture on Google Cloud. Worked on key features like the product detail page and a location-based store finder using Google Maps API. Participated in the API Council, promoting an API-first approach across teams.
Android Developer at CHECK24
2016 - 2017
Developed and maintained Android apps for legal insurance comparison and banking services as part of a cross-functional team. Implemented automated testing and supported the CI pipeline to enhance release quality and development speed.
Blog
Explore my latest articles.
From RAG to Multi-Agent AI for Job Matching
A look into evolving from a RAG model to a multi-agent system with Google's ADK for more accurate, AI-powered job matching.
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From Prototype to Production - Local Kubernetes: Our AI Resume Matcher's Journey
Learn to deploy a Java AI application on local Kubernetes! This guide covers Dockerizing our AI Resume Matcher, crafting K8s manifests (app & database), and integrating Google Vertex AI securely.
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Using RAG with Java Spring Boot AI & Google Vertex AI: Crafting an Automated Resume Matcher
A look into combining Retrieval-Augmented Generation with Spring Boot AI and Vertex AI for practical applications like resume matching.
Read MoreContact Me
Feel free to reach out to me via email for any inquiries or collaborations.
[email protected]Testimonials
"Tim was incredibly helpful in reviewing my software. His feedback was clear, constructive, and always spot-on. I really appreciated his support and expertise."
Oliver Hommel
"Working with Tim was a pleasure. I was always impressed by his technical skills, reliability, and collaborative spirit. He consistently delivered clean, thoughtful code and was a great team player. I’d jump at the chance to work together again."
Juri Zeisler