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Christian Winzen

@christianwinzen

Senior Backend PHP Developer at Antiloop GmbH, where I integrated an API-first product configurator with ERP and PIM systems.

Germany

Message

At Antiloop GmbH, I developed and integrated an API-first product configurator for an industrial client in the Spryker e-commerce ecosystem. The work connected ERP and PIM systems through RESTful APIs and supported configurable products in the cart and checkout.

I also automated data imports using 70 maintainable, individual CSV files, and worked on customer-specific B2B product data preparation. My work included API integrations, security, and performance optimization.

At Anexia GmbH, I developed and maintained a modular backend application for managing virtualized infrastructure. I implemented backend modules for VM provisioning and lifecycle management, network and IP administration, DNS, backup and recovery, and queue-based processing.

Earlier, at NumBirds GmbH, I developed a data-intensive CRM system for analyzing travel data and independently designed, implemented, optimized, scaled, and refactored 20 API endpoints. At silversurfer7 GmbH, I developed and maintained CMS-based PHP applications and supported the training of two software development apprentices.

Experience

Work history, roles, and key accomplishments

Senior Backend PHP Developer

Antiloop GmbH

Jan 2023 - Jan 2026 (3 years)

Conceived, developed, and integrated an API-first product configurator for an industrial client within the Spryker e-commerce ecosystem, including ERP and PIM integration, RESTful APIs, and automated data imports. Managed a team of 5-9 developers and optimized performance and security.

PHP Spryker REST APIs JSON XML CSV Swagger OpenAPI SQL Propel Redis RabbitMQ Jenkins ETL OAuth SFTP B2B Product Configuration

PHP Developer

Anexia GmbH

Jan 2022 - Jan 2023 (1 year)

Developed and maintained a highly complex modular backend application for managing virtualized infrastructure, including VM provisioning, lifecycle management, network and IP administration, DNS, backup and recovery, and queue-based processing.

PHP Zend Framework Phalcon Doctrine SQL VSphere REST APIs Queue processing Infrastructure Management

Anwendungsentwickler CRM Backend

NumBirds GmbH

Jan 2019 - Jan 2022 (3 years)

Developed a high-performance, data-intensive CRM system for analyzing travel data using Symfony 5, with automated processing of large data volumes. Independently designed, implemented, and optimized 20 API endpoints and automated data processing pipelines.

Symfony PHP AWS S3 SQS SNS Step Functions API Gateway SFTP OAuth SOAP GraphQL Webhooks Jenkins ETL SQL PostgreSQL Monitoring

Junior Full Stack PHP Developer

silversurfer7 GmbH

Jan 2016 - Jan 2019 (3 years)

Developed and maintained complex CMS-based PHP applications with intricate permission structures for leading travel and mobility companies. Integrated APIs and implemented end-to-end booking processes and automated document generation.