David M. - Senior Full-Stack Developer

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Maikammer, Germany

Experience

Nov 2023 - Present

1 year 10 months

Senior Full-Stack Developer

AL-KO Geräte GmbH

Architecture and execution of a full enterprise migration from a legacy hosting infrastructure to AWS cloud platform for an international e-commerce network with 22 dedicated online stores in 22 countries (alko-garden.de, alko-garden.ch, alko-garden.at, etc.)
Optimization and enhancement of the existing OXID eShop platform across all 22 country-specific domains, dramatically improving load times and user experience through advanced performance optimization techniques for each regional online store
Implementation of a comprehensive AWS infrastructure with CloudFormation for automated deployments, RDS Aurora database clusters, OpenSearch analytics, Docker containerization, and auto-scaling mechanisms to handle traffic across all 22 international shop domains
Development of full-stack solutions with backend PIM/CRM integration for multilingual product management and frontend internationalization with country-specific routing, currency handling, and localized user experiences across all markets
Collaboration in a focused 6-developer team for an enterprise e-commerce platform with country-specific requirements
Technologies: AWS CloudFormation, OXID eShop, Docker, RDS Aurora, OpenSearch, Auto-Scaling, PIM/CRM Integration, Internationalization, Performance Optimization, E-Commerce
Achievements: successful architecture and execution of the complete enterprise migration, dramatic improvements in load times and user experience, implementation of a comprehensive AWS infrastructure, and development of full-stack solutions for 22 international markets

Sep 2022 - Jun 2023

10 months

Senior Frontend Developer

Deutsche Bahn

Developed a new innovative Kanban board system for real-time train status display and updates, live operational control for German rail infrastructure using Angular enterprise architecture
Built a modern frontend for live tracking of all trains including position and status from scratch
Implemented a robust frontend for an efficient data outage system with fail-safe mechanisms and automatic recovery protocols
Collaborated in a 16-developer team in the Plan Corridor department, ensuring top code quality through comprehensive Jasmine unit tests
Technologies: Angular, TypeScript, Jasmine Unit Testing, Enterprise Architecture, Real-Time Systems, Kanban Boards, Data Visualization, Fail-Safe Systems, Live Tracking
Achievements: delivered the Kanban board system, built the live tracking frontend, implemented the data outage system, and collaborated successfully with the team

Oct 2021 - Aug 2022

11 months

Senior Software Architect

Advocate Software

Led software architecture and served as team lead for a modern cloud-based law firm management platform built from scratch with an Angular frontend, NestJS backend, Ionic, and Electron
Architected an end-to-end encrypted security framework with multi-layer authentication and compliance with legal industry standards
Designed modern UI/UX for lawyers, including an integrated document editor, case management workflows, and client portals
Managed a cross-platform development team of 10 developers
Developed an internal chat system using @nestjs/websockets for real-time collaboration
Technologies: Angular, NestJS, Ionic, Electron, @nestjs/websockets, TypeScript, Cloud Platforms, Security Frameworks, UI/UX Design
Achievements: successfully architected and delivered the platform, led the development team, and implemented the chat system and end-to-end encryption framework

Jan 2021 - Sep 2021

9 months

Senior Frontend Developer

HZD

Developed highly secure frontend applications for the government sector, including the Elster tax office system, using Angular and Bootstrap CSS according to BFSG standards
Built a secure frontend for police agencies with encrypted data transmission and multi-layer authentication
Created the frontend for the housing benefit form system with encrypted data transfer and regulatory compliance
Implemented BFSG accessibility standards, secure coding practices, and audit trail requirements
Technologies: Angular, Bootstrap CSS, TypeScript, BFSG Accessibility, Government Security, Encrypted Transmission, Multi-Layer Auth, Compliance
Achievements: delivered the Elster frontend application with full accessibility compliance and built secure frontends for police and housing benefit systems

Jan 2020 - Dec 2020

1 year

Senior Full-Stack Developer

BIONTECH

Architected and developed an enterprise CRM management system from scratch with an Angular and Bootstrap CSS frontend and a Java Spring Boot backend
Created a comprehensive REST API for XML import from SAP software for seamless data integration
Built the PharmaPilot system with customer management, invoice processing, order management, and inventory control
Collaborated with 12 senior developers in an agile environment, with rigorous code reviews and automated testing
Technologies: Angular, Java Spring Boot, Bootstrap CSS, REST APIs, SAP Integration, XML Processing, CRM Systems, Agile Development
Achievements: successfully delivered the PharmaPilot CRM system and implemented the SAP integration solution

Jan 2017 - Dec 2019

3 years

Full-Stack Developer & UI/UX Designer

Concept Studio

Developed a secure card ordering front-end with React and Tailwind CSS and a Java Spring Boot backend for banking clients
Built an end-to-end claims management system from scratch for insurance clients
Created an employee management system with a Laravel backend and check-in/check-out features
Implemented scalable NestJS backend services on AWS, including payroll integration and reporting dashboards
Contributed to UI/UX design initiatives and provided Swagger API documentation
Technologies: React, Java Spring Boot, NestJS, Laravel, Tailwind CSS, AWS, Docker, MySQL, Swagger, Microservices
Achievements: Delivered the insurance claims management system, deployed secure banking applications, and cut deployment time by 70%

Jan 2014 - Dec 2016

3 years

Full-Stack Developer

IT-CAP Studio

Developed a comprehensive travel booking platform with a Laravel backend and Angular frontend
Designed professional UI/UX and implemented responsive interfaces
Built mobile apps with the Ionic framework for cross-platform booking features
Integrated payment systems, APIs, and optimized databases
Technologies: Laravel, Angular, PHP, JavaScript, MySQL, Ionic Framework, HTML5, CSS3, Bootstrap, Git
Achievements: Delivered multiple booking platforms and increased booking completion rates by 60%

Jan 2012 - Nov 2013

1 year 11 months

Washington, United States

Java Backend Developer

United Realty Ltd

Developed backend systems with Java and Spring Framework for real estate management platforms
Built RESTful APIs for property listings, price comparisons, and agent management
Implemented MySQL database solutions for market analysis and user management
Integrated third-party APIs and MLS systems for comprehensive market data
Technologies: Java, Spring Framework, MySQL, REST APIs, Hibernate, Maven, Apache Tomcat, MLS Integration
Achievements: Developed a scalable backend system for 10,000+ property listings and improved search response times by 60%

Jan 2011 - Dec 2011

1 year

Lima, Peru

Junior PHP Engineer

INTERBANK

Developed and maintained banking web applications with PHP, MySQL, and JavaScript
Implemented secure payment processing modules and transaction validation systems
Collaborated on database design and optimization for financial data processing
Participated in code reviews and followed banking security protocols
Technologies: PHP, MySQL, JavaScript, HTML/CSS, Apache, Linux, SVN
Achievements: Contributed to systems processing millions daily with zero security incidents