Christian Seifert
Full-Stack-Developer
Experience
Full-Stack-Developer
AssistenzUp GmbH
- Complete redevelopment of a time and work tracking software for student support and people with disabilities.
- Responsible for the fundamental restructuring of the code using Angular 19 (frontend) and Next.js (backend) on a TypeScript basis.
- Implemented as a monorepo with NX workspace.
- Set up AWS infrastructure and built a GitHub CI/CD pipeline for automated deployments.
Full-Stack-Developer
INTERGAST Großverbraucher-Service Handelsgesellschaft mbH
- Developed a B2B wholesale shop with a microservice architecture.
- Used PHP 8.2, Laravel 10, Angular 17, and TypeScript for development and implementation.
- Designed and implemented features on both sides of the application.
- Collaborated closely with team members for seamless integration and optimal performance.
Full-Stack-Developer
AuA24 AG
- Developed an innovative software solution in the field of occupational health and safety.
- Planned and implemented autonomous subsystems using test-driven development.
- Ensured seamless interaction with the existing ecosystem.
- Built complex features based on Laravel 10 and Angular 15.
Full-Stack-Developer
IT system house based in Saarbrücken with over 20 years of IT experience
- Enhanced existing products in both backend and frontend areas.
- Made specific customizations for Shopware to meet evolving e-commerce requirements.
Backend-Core-Developer / Interim Lead-Dev
Leading online retailer in Germany & Europe
- Improved the existing checkout process.
- Implemented new features, including integration of Payback and expanded payment options.
- Co-led and coordinated a development team to meet deadlines.
Frontend-Developer
IT service provider from Saarbrücken with over 20 years of IT experience
- Further development of a React application.
- Optimizing usability and implementing new features.
- Improving performance and functionality to boost overall performance.
Frontend-Developer
Blackbit digital Commerce GmbH
- Implementation of several e-commerce platforms.
- Development of responsive user interfaces.
- Implementation of user-friendly features for a smooth shopping experience.
- Collaboration with designers and backend developers to deliver high-quality, scalable solutions.
Full-Stack-Developer
Large German telecommunications provider
- Planning and implementation of one of the largest internal order visualization projects.
- Collaboration with stakeholders for requirements analysis and development of technical solutions.
Lead Developer
Behind you GmbH
- Leadership and coordination of development projects in various areas.
- Planning, execution, and monitoring of software projects to meet customer requirements and ensure timely delivery.
- Expanding the service offering and exploring new business opportunities through proactive engagement.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (8.5 years), Professional Services (6 years), Food and Beverage (2.5 years), Retail (2 years), Telecommunication (2 years), and Education (1.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (12 years), Product Development (8.5 years), and Project Management (8 years).
Summary
My way of working is analytical and results-oriented. I question obvious approaches and strive for the optimal solution. High quality in my daily work as well as open and honest communication with colleagues and customers is my top priority.
I work, think and act with full focus on the larger goal. I can draw on extensive experience in project planning, implementation, project management as well as customer care and consulting.
Classical project management methods are just as familiar to me as agile approaches. In doing so, I like to adapt to practiced methods, always with the aim of demonstrating improvements. What's right is what works.
Skills
Critical
Analytical Thinking
Quick Comprehension
High Quality Awareness
High Willingness To Learn And Improve
Open, Understandable And Direct Communication
More Than Ten Years Of Programming And Project Experience
Backend- And Frontend Languages: Php, Typescript, Html, Css
Frameworks: Laravel, Laminas, Phpunit, React, Vue.js, Express.js, Angular
Frontend-stack: Less, Sass, Webpack, Gulp
Cms & E-commerce Platforms: Wordpress, Joomla, Magento, Shopware, Xt:commerce
Other: Ci/cd, Docker, Test-driven-development
Ihk Certified Trainer For It Specialists
Languages
Certifications & licenses
IHK Certified Trainer for IT Specialists
IHK
Profile
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