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Alexander S.

Full-Stack Developer (Java/Kotlin/Angular)

Munich, Germany

Experience

Aug 2024 - Dec 2025
1 year 5 months
Lübeck, Germany

Full-Stack Developer (Java/Kotlin/Angular)

Hypoport (Vergleich.de)

  • Further development of the vergleich.de website
  • Developing new and improving existing backend services as microservices
  • Deployment via TeamCity and GitHub Actions
  • Development of monitoring tools
  • Development of REST APIs
  • Database migration from Oracle to PostgreSQL
  • Tech stack: Java and Kotlin (Spring, Spring Boot, JPA, Hibernate), Angular (TypeScript), JavaScript, IntelliJ IDEA, WebStorm, Apache Maven, Oracle DB, MongoDB, PostgreSQL, Git (GitLab, GitHub, BitBucket), TeamCity, Jira, Docker, JUnit, Mockito, Jasmine
Jun 2023 - Dec 2025
2 years 7 months
Kamp-Lintfort, Germany

Full-Stack Developer

Computer Futures / KRZN

  • Enhancing and customizing existing software
  • Building a new instance manager (Java frontend and Angular backend) and a password store
  • Estimating complexity
  • Developing REST APIs
  • Authentication using Keycloak
  • Tech stack: Angular 20 (Angular Material, RxJS), TypeScript, Java 21, Spring Boot 3.4.2, Python, PostgreSQL, Keycloak, PrivacyIDEA, WebSocket, Kubernetes (Rancher), Git, GitLab, SourceTree, IntelliJ IDEA Ultimate, WebStorm, Jira, Clean Code Architecture, JUnit, Mockito
Mar 2023 - Mar 2023
1 month
Lucerne, Switzerland

Full-Stack Developer / DevOps

Callista / CSS

  • Enhancing and customizing existing software
  • Deployments to Kubernetes via TeamCity
  • Tech stack: Angular 15 (Angular Material, RxJS), Java 18, TypeScript, Git, Bitbucket, SourceTree, IntelliJ IDEA Ultimate, Kubernetes, Cypress Testing Framework, Clean Code Architecture, DDD
Jan 2023 - May 2023
5 months
Munich, Germany

Founder and Full-Stack Developer

Stockforecast.de

  • Developed a single-page web app in Angular 12
  • Developed a backend server application in Kotlin
  • Integrated Google Cloud Platform (Firebase): Authentication, Firestore NoSQL, Storage, Cloud Functions, Hosting, Cloud Run
  • Connected the Financial Modelling Prep API as a data source
  • Automated analysis of historical stock data to identify statistical patterns (statistical trading)
  • CI/CD via GitHub Actions with Docker and Google Cloud Run
  • Tech stack: Kotlin 1.8.0, Spring Boot 3.0.3, TypeScript with Bootstrap, Firebase, Git, GitHub, SourceTree, IntelliJ WebStorm, IntelliJ IDEA
Oct 2021 - Jan 2023
1 year 4 months
Lübeck, Germany

Full-Stack Developer (Java/Kotlin/Angular)

Hypoport (Vergleich.de / Dr. Klein)

  • Further development of the vergleich.de and drklein.de websites
  • Developing new and improving existing backend services as microservices
  • Developing monitoring tools
  • Deployment via TeamCity and GitHub Actions
  • Developing REST APIs
  • Tech stack: Java, Kotlin (Spring, Spring Boot, JPA, Hibernate), Angular (TypeScript), JavaScript, IntelliJ IDEA, WebStorm, Apache Maven, Oracle DB, MongoDB, Git (GitLab, GitHub, BitBucket), TeamCity, Jira, Docker, JUnit, Mockito, Jasmine
Jan 2021 - Dec 2021
1 year
Munich, Germany

Founder and Full-stack Developer

Blitzshare.de

  • Developed a single-page web app in Angular 12
  • Developed a backend server application in Kotlin
  • Integrated Google Cloud Platform (Firebase): Authentication, Firestore NoSQL, Storage, Cloud Functions, Hosting
  • Connected various APIs (Google Geocoding, Google Translation, Algolia Search, Twilio SendGrid)
  • CI/CD with GitHub Actions
  • Tech stack: Kotlin 1.4.21, Spring Boot 2.4.2, Angular 12 (Angular Material, RxJS), TypeScript with Bootstrap, Firebase, Git, GitHub, SourceTree, IntelliJ WebStorm, IntelliJ IDEA
Feb 2019 - Dec 2020
1 year 11 months
Munich, Germany

Backend Developer (Java)

OSB / it@m

  • Co-developed the base framework for online services of the City of Munich
  • Continued and newly developed online services using JavaServer Faces (JSF)
  • Integrated base components like ePayment and backend services (web services)
  • Created and updated technical documentation (UML diagrams)
  • Reviewed and specified technical deployment options for additional products/frameworks
  • Developed microservices, test-driven development (TDD)
  • Tech stack: Java (Spring, JPA, Hibernate), JavaScript, Eclipse IDE, Apache Maven, Camel, ActiveMQ, Git, Subversion, Oracle SQL Developer, Jenkins, SonarQube, Mantis, TestLink, LiMux (Ubuntu 18.04 LTS), JUnit
Feb 2016 - Dec 2020
4 years 11 months
Munich, Germany

Android App Developer

Own Solo Project

  • Developed a card game app
  • Developed a fitness tracking app with a Spring Boot server component
  • Developed a health app
  • Installed and managed an Ubuntu server for the server component
  • Tech stack: Java, Kotlin, Android Framework, Gradle (app), Maven (server), Android Studio, Eclipse EE, Ubuntu 16.04.5 LTS, Apache, Tomcat, MySQL, phpMyAdmin, Subversion, PuTTY, WinSCP
Dec 2015 - Feb 2019
3 years 3 months
Munich, Germany

Backend Developer (Java) and Development Team Leader

Cataneo GmbH

  • Developed new program modules and improved and extended existing ones (primarily backend, also frontend)
  • Led a development team of 5 people
  • Conducted code reviews and bug analyses
  • Handled data imports and exports (XML/XSD, Apache POI)
  • Developed RESTful web services
  • Migrated from ANT to Maven
  • Documented code (UML, Markdown, AsciiDoc)
  • Tech stack: Java 9 (Spring, Spring Boot, Spring Batch, Spring Security, Querydsl), JavaScript (jQuery), Oracle SQL, Maven, Eclipse, VS Code, Oracle SQL Developer, Git, Subversion, PuTTY, WinSCP, Jenkins, SonarQube, Jira, OTRS, Windows 10 Pro, Microsoft Office 2019
Jul 2014 - Nov 2015
1 year 5 months
Munich, Germany

System Test Manager

Conplan GmbH / MEAG

  • Automated installation of test machines with Windows 7 64-bit for rollout preparation
  • Managed machines and created deployment orders
  • Supported testers and helped with issue investigation/defect resolution
  • Created test plans and logged test runs in HP Quality Center
  • Assisted in various project management tasks
  • Tech stack: Windows Vista 32-bit, Windows 7 64-bit, Microsoft Office 2007/2013, HP Quality Center, SCCM, DDWI
Jun 2014 - Jul 2014
2 months
Munich, Germany

First and Second Level Support

Far Galaxy Networks

  • User support and 1st/2nd-level server administration
  • Managing and maintaining user accounts and mailboxes
  • On-site customer support
  • Technical environment: Windows 7/8, Windows Server 2008/2012, Active Directory, LogMeIn
Apr 2014 - Jan 2015
10 months
Munich, Germany

Master's Thesis: Using multiple cameras ... as a unidirectional proximity sensor

Institute for Cognitive Systems (TU München)

  • Developed a camera system as a unidirectional proximity sensor on robot limbs
  • Developed software to analyze camera images and determine object distances
  • Technical environment: C++ with OpenCV, Windows 7
Aug 2012 - Dec 2012
5 months
Munich, Germany

Template design and QA for Microsoft Office

Conplan GmbH / Munich RE

  • Designed and customized templates for Microsoft Word 2007 and PowerPoint 2007
  • Conducted HP Quality Center tests for Word, Outlook, PowerPoint, Excel, Access, Visio 2007
  • Logged file inventory
  • Wrote test plans, documentation, and guides for in-house tools
  • Technical environment: Windows 7, Microsoft Office 2007
Apr 2012 - Feb 2013
11 months
Munich, Germany

Magazine design and editing

Verein der Studenten im Olympiazentrum e.V.

  • Created a design template (Microsoft Office) for the club magazine Oly-Info
  • Wrote articles and translated the entire magazine into English
  • Coordinated with committees and provided support
  • Technical environment: Windows 7, Microsoft Office 2007
Dec 2011 - Feb 2012
3 months
Traunreut, Germany

Bachelor's Thesis: Programming a microcontroller to develop a circadian lighting control system

Siteco Beleuchtungstechnik (ehem. Siemens)

  • Performed light measurements and did mathematical analysis of the data
  • Selected, ordered, and installed electronic components
  • Extensively programmed an Atmel microcontroller using a DCF77 receiver to determine the current time
  • Technical environment: Windows 7, AVR Studio 4, Atmel AT90PWM316
Sep 2011 - Nov 2011
3 months
Traunreut, Germany

Engineering Intern

Siteco Lighting Technology (formerly Siemens)

  • Performing firmware updates on lighting controllers
  • Programming various development tools in Delphi
  • Soldering multiple model circuits for training purposes
  • Measuring quartz crystals on an oscilloscope at different temperatures, replacing them and remeasuring, documenting the results
  • Assisting with mathematical calculations
  • Technical environment: Windows 7, Turbo Delphi

Languages

German
Native
English
Advanced
Latin
Elementary

Education

Apr 2012 - Feb 2015

TU München

Master of Science · Electrical Engineering and Information Technology · Munich, Germany

Oct 2008 - Mar 2012

TU München

Bachelor of Science · Electrical Engineering and Information Technology · Munich, Germany

Sep 1998 - Jun 2008

Johannes-Heidenhain-Gymnasium Traunreut

Abitur, major subjects: Math, Physics · Traunreut, Germany · 2,3

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