Architect / Developer

Short-term project in the area of "handyhase," focusing on a comprehensive redesign.

• Redesign & Implementation: Overhaul of the entire design and implementation of new UI/UX aspects using React.
• Architecture & Structure: Planning of the software architecture and structuring of the project for long-term scalability. Used Git for version control.

• Programming Languages: Java 20, Scala, PHP, Node.js, JavaScript (React, Angular)
• Frameworks & Tools: Spring Boot, Hibernate, Liferay, Maven, Ant, Jenkins, JUnit, Tomcat, OAuth 2, Git, Gitea, Docker, Git CI/CD Pipelines
• Databases: PostgreSQL, MySQL, MongoDB
• AI Development: GPT-4All for address validation, proprietary AI models (training & fine-tuning), AI tool for address detection
• Frontend Development: Responsive interfaces with Angular, React, and GWT
• Backend Development: Robust solutions using Java 20 and Node.js, including OAuth 2 implementations for secure authentication.
• Version Control: Git, Gitea, SVN
• Java EE Technologies: JSF, JPA, JAX
• Digital Mail Services: Optimized processes such as printing, PDF conversion, text recognition, and digital signatures.
• AI Tool for Address Detection: Developed a Vue-based training system for accurate address recognition.
• Authentication System: Developed a 5-factor login and authentication system, integrated FIDO2 for secure, passwordless authentication.
• Automation: Managed cron jobs with PHP, Node.js, and Java.
• GraphQL Implementation: Optimized data queries and performed comprehensive log analyses.
• Secure Data Transfer: SFTP management in PHP for efficient and secure data exchange processes.
• Management of ADFS servers and SAML 2.0.
• Setup of internal Git systems with Gitea and pipeline automation.
• Experience with large data handling and optimization of storage processes on AWS.
• Strong collaboration through pair programming to improve code quality and knowledge sharing.

• Programming Languages & Frameworks: React, Angular, Vue, JavaScript, Typescript
• Tools & Platforms: Git, Jenkins, Testing Pipelines, Docker, Git CI/CD Pipelines
• Rebuilding Article Importer App: Redeveloped the existing Article Importer app using React and REST API.
• Developing a Soccer App: Created a new app for the 2022 World Cup featuring events, lineups, statistics, and knockout phase information, tested extensively using Firebase Labs to ensure compatibility across various mobile devices.
• Testing & CI/CD: Established robust testing pipelines and Git release pipelines.
• Migration: Migrated React-based projects to Angular and Vue.

Led the modernization of enterprise systems by handling large data imports, building scalable applications, and migrating legacy platforms.

• Programming Languages: Java (8+), Groovy, JavaScript (React, Angular, Node.js), Kotlin, JUnit
• Frameworks & Tools: Spring Boot, Hibernate, Liferay, Maven, Ant, Jenkins, Redux, Git, Docker, Git CI/CD Pipelines, Material-UI, Node.js, REST APIs
• Databases: PostgreSQL, MySQL
• Java EE Technologies: JSF, JPA, JAX, JSON-P
• Data Integration: Managed large data imports (SAP, Loga, CSV, XML) into dynamic databases for validation and transformation.
• Platform Migration: Rebuilt a legacy Java-based platform to React.
• Build Automation: Automated builds and deployments with Maven and Ant.
• Testing: Ensured code quality with JUnit and CI pipelines.
• Version Control: Maintained code quality and collaboration with Git.

Developed and enhanced solutions for email spam detection, implementing robust backend services and real-time monitoring systems.

• Programming Languages: Java, C++, Python, JavaScript (React), PHP
• Frameworks & Tools: Spring Boot, Maven, JUnit, Git
• Email Spam Detection: Developed backend solutions using Java and Spring Boot, tested with JUnit.
• Frontend Development: Enhanced the Pluto Customer Configuration Platform with React.
• Version Control: Used Git for collaborative development.

Contributed to feature testing, page optimization, and the development of backend and frontend solutions for Loquo and Alamaula.

• Programming Languages: JavaScript, PHP, Java
• Frameworks & Tools: Prototype, jQuery, Smarty, CakePHP
• Data & Search: MySQL, MongoDB, Elastic Search
• Infrastructure: OpenStack, Grafana
• Styling: CSS, SCSS
• Fullstack Development: Developed and maintained backend and frontend features for Loquo and Alamaula platforms using Java, JavaScript (Prototype, jQuery), PHP, Smarty, CakePHP, and MySQL/MongoDB.
• SEO Optimization: Conducted search engine optimization and created sandbox environments for SEO testing across multiple websites.
• Error and Redirect Handling: Implemented error tracking and redirect management using Grafana, focusing on shingle creation and performance.
• Search Integration: Optimized search functionality using Elastic Search for faster and more accurate results. Used Elastic Search for dynamic page generation.
• Massive Data Imports: Implemented and managed large-scale data imports and delta imports for search pages, ensuring up-to-date and performant search indices.
• Prototype and jQuery: Built responsive and dynamic interfaces with these libraries for frontend development (UX-Tests).
• Page Optimization: Improved page load times and user experience through frontend and backend performance tuning.
• Infrastructure: Maintained and optimized systems on OpenStack, including monitoring with Grafana.
• Styling: Developed and maintained stylesheets using CSS and SCSS for consistent UI/UX.

Contributed to the development of advanced image processing tools and calibration systems for ePass Readers used by the Bundesdruckerei.

• Programming Languages: C, C++, PHP
• Libraries & Tools: Halcon, Boost, Qt
• Standards: SOAP, WSDL
• Methodologies: Requirements analysis, UML
• Embedded Programming: Developed image recognition and processing software for the new ePass Readers.
• Calibration Tool: Created a calibration tool for ePass Readers using Halcon, C/C++, Boost, and Qt.
• Specification & Analysis: Collaborated on specification documents and performed requirements analysis using UML.
• Web-Based Solutions: Developed a PHP-based project management tool to support internal workflows.

Worked on cable modem design and conducted stress tests for cable network infrastructure.

• Programming Languages: Java, Perl
• Cable Modem Design: Contributed to the design and development of cable modems.
• Network Stress Testing: Conducted performance and stress tests on cable networks using Java and Perl.

ERA employee management software