Rüdiger S. - Full-Stack Software Engineer / Consultant for Digitalization

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Berlin, Germany

Experience

Sep 2024 - Jul 2025

11 months

Full-Stack Software Engineer / Consultant for Digitalization

Unnamed Company

Debian servers, Coolify, Docker Compose, PostgreSQL
Kotlin Spring backend with custom Spring Security and data access via jOOQ
Next.js frontend with App Router, TanStack Query and React Hook Form
Shadcn UI and Tailwind CSS
Design, planning and development of an internal planning tool for events
Conducting a feature discovery workshop at the client
Replacing Excel-based internal processes

Aug 2023 - Jun 2024

11 months

Full-Stack Software Developer

Swiss Marketplaces Group

Serverless TypeScript backend on AWS (Lambda, DynamoDB, SLS, SQS)
TypeScript frontend with Vue.js
CI pipelines on GitLab.com and GitHub.com
Harmonizing two brands on a shared technical platform
Integrating Split.io feature flags into the serverless environment

Jan 2020 - Jun 2022

2 years 6 months

Full-Stack Software Developer

Homegate AG

Serverless TypeScript backend on AWS (Lambda, DynamoDB, SLS, SQS, Step Functions, API Gateway)
TypeScript frontend with Vue.js
Analysis and migration of Java/Spring services to serverless
CI pipelines on GitLab.com
Splitting the monolithic legacy application into separate modules
Implementing modern techniques (serverless backend, SPA frontend)
Adding extensive monitoring

Apr 2019 - Sep 2019

6 months

Developer Training

Mister Spex

Teaching the basics of programming with vanilla JavaScript in nine training sessions
Creating a time tracking tool for participants

Oct 2018 - Sep 2019

1 year

Senior Software Developer

Meindach GmbH

Kotlin, Java, Reactive Spring (Boot, Data, Security, Web)
Redis, MySQL/Hibernate
Kubernetes/Helm on Google Cloud
Continuous integration, Terraform
Design and development of back-office applications
Integration with SugarCRM
Migrating various cloud/CI processes to a unified Google Cloud/Kubernetes stack
Conducting a workshop on Kubernetes and Helm
Designing a Redis data structure

Mar 2018 - Sep 2018

7 months

Senior Software Developer

GoEuro Travel GmbH

Java, Spring (Boot, Data)
Stream Processing, Data Conversion
Test-Driven Development
Migration of a large central data set from MySQL to a JSON document structure
Coaching junior developers through pair programming and agile methods
Involved in designing and implementing the technical concept

Oct 2017 - May 2018

8 months

Software Developer, Consultant

Charité Berlin

JavaScript/ES6, React, Redux, Bootstrap, Styled Components
Test-driven development with Jest and Enzyme
UX design and client workshops for a detailed UI concept
Developed a web frontend for managing user access as a single-page application

Apr 2017 - Dec 2017

9 months

Software Developer, Consultant

Scout24 AG

Java backend with Spring (Boot, MVC, Cloud), Docker, AWS, Hibernate/JPA, PostgreSQL
Gradle, TeamCity, Git, Microservices, DevOps, Continuous Deployment, React
Replaced an ESB installation with specialized microservices for data stream processing

Nov 2016 - Present

9 years

Tech Lead, Operations

Restrealitaet e.V.

Backend: Spring (Boot, Data, Security, Web) in Kotlin and Java, Docker, Hibernate/JPA, MySQL, Node.js, MongoDB
Legacy: Perl, PHP
Frontend: Backbone, React; admin app with React, Redux, Bootstrap
DevOps: CI/CD with GitHub Actions, Ansible, Linux servers, monitoring with Grafana
Technical lead for further development of frontends and backends
Migrated legacy backends from Perl and PHP to Java and Kotlin
Managed operations using Docker containers
Planned and defined the system architecture
Coordinated additional community developers

Sep 2016 - Dec 2016

4 months

Software Developer, Consultant

Datalab GmbH

Java backend with Spring (Beans, MVC, Boot, Cloud, Data), Docker, Hibernate/JPA, PostgreSQL, Kafka, Thymeleaf, Servlet 3.0
Test-driven development with JUnit, Hamcrest, Mockito
Gradle, TeamCity, Git/Stash
Assisted a retail company in CRM and POS up to a successful product launch
Follow-up work to prepare for the Christmas season

Oct 2013 - Jun 2015

1 year 9 months

Software Developer

Zalando GmbH

Java backend with Spring (Beans, MVC, Security, Data), Hibernate/JPA, PostgreSQL, JSP, Servlet 3.0
Test-driven development with JUnit, Hamcrest, Mockito
Maven, TeamCity, Git/Stash
JavaScript frontend with Backbone.js, JSON, REST
Further development of the online shop
Developed a component for personalized product recommendations
Provided architecture consulting for splitting the component into microservices

Oct 2011 - Sep 2013

2 years

Software Developer

Immobilien Scout GmbH

Java backend with Spring (Beans, MVC), JSP, Thymeleaf, Servlet 3.0
Test-driven development with JUnit, Hamcrest, Mockito
Maven, TeamCity
JavaScript frontend with YahooUI, JSON, REST, Google Maps
Continued development of the search function using Scrum/Kanban
Developed an autocomplete component for location input
Integrated Google Maps into search results

May 2009 - Dec 2009

8 months

Senior Java Consultant

MTV Networks Germany GmbH

Java Enterprise, Eclipse
Advised on migrating to a central Java-based CMS
Supported the implementation of a site prototype

Jul 2008 - Jun 2011

3 years

Senior Java Developer & Consultant

Axel Springer Media Systems Berlin

Escenic CMS, JEE, Spring, JSP, Wicket, Eclipse, SVN, Maven, JIRA, AJAX, REST
Object-oriented JavaScript with Prototype and jQuery
VMware, CentOS Linux
Developed reusable web components (widgets) for Escenic CMS
Designed and developed a paid-content component (paywall)
Relaunched and enhanced WELT Online and Hamburger Abendblatt Online
Introduced a VMware-based Eclipse development environment

Mar 2008 - Apr 2008

2 months

Java Webapplication Developer

Toptarif Internet GmbH

Java, Stripes, jQuery, Hibernate, web services, Spring, Maven
Ongoing platform development in day-to-day operations
Co-developed a core component for car insurance comparison with AJAX input forms
Integrated a large-scale web service
Technical and conceptual consulting

Jan 2008 - Present

17 years 10 months

Full-Stack Software Engineer (Self-Employed)

Self-Employment

Jan 2006 - Dec 2010

5 years

Founder, Developer and Technical Lead

IndyPhone.de

Java, Apache Wicket, Spring, JPA/Hibernate, Maven, Trac, SVN, Eclipse, Tomcat, Jetty
Software design and implementation of the founding concept
Extension with community features
Selection of a modular, scalable and reusable software stack
Onboarding new developers without detailed knowledge of the entire system

Jan 2004 - Dec 2008

5 years

Software Developer for Web Applications and Content Management Systems

SkyGate internetworking GmbH

Implementation of a categorized full-text search engine with Lucene/Nutch, JSP, JDBC
Development of crawler plugins, basic and advanced search, automatic search result optimization
Implementation of reusable Web 2.0 components with RedDot LiveServer, JEE, Tomcat, MySQL
Technical leadership, coordination and training of the developer team
Development of an intranet application with Apache Wicket, Hibernate, JBoss, MS SQL, PostgreSQL
Implementation of input forms and email reminder functions, platform switch from Windows to Unix without issues

Jan 2000 - Dec 2004

5 years

Internet Software Developer (Working Student)

SkyGate GbR

Jan 1998 - Dec 2000

3 years

Web Developer

Self-Employed

Summary

My main areas of work are architectural design, planning and development of web applications, backends for mobile apps and other distributed systems, and integrating these applications with existing systems like CMS, CRM or payment systems. I have experience leading, training and coordinating developer teams, as well as selecting and maintaining development tools, coding conventions and tech stacks.

I specialize in software development on the Java/Spring platform or serverless or node-based TypeScript in the backend, and React or Vue.js in the frontend.

To achieve project goals, I prefer agile methods like Scrum, Kanban and continuous delivery.

In addition to this development focus, I also work on all other aspects of software engineering such as cloud architectures, operations and monitoring.