# kohld.eurosky.social (@kohld.eurosky.social)

Profile: https://sifa.id/p/kohld.eurosky.social
Headline: PHP Backend Entwickler bei interactive tools GmbH - Digitalagentur

## About

Experienced PHP Backend Developer specializing in multilingual enterprise solutions. Translates complex business requirements into clean, high-performance code: from API development to database optimization. Strong focus on code quality, clean architecture, and modern frameworks.

## Experience

- **Software Developer at NFON** (2019 – 2020)
  \- Engineered and deployed robust APIs using PHP (Yii 2), facilitating reliable communication within a complex telecommunications infrastructure.
  \- Advanced Quality Engineering standards by implementing automated testing patterns to ensure high-availability of backend services.
  \- Contributed to the modernization of core backend components, focusing on performance and security in a cloud-heavy environment.
- **Developer at Exozet** (2015 – 2017)
  \-  Engineered and deployed scalable web applications utilizing Symfony 2 and Symfony 3 within complex, high-availability infrastructure environments.
  \- Authored comprehensive technical concepts and documentation, translating client business requirements into actionable development roadmaps.
  \- Managed backend development lifecycle for diverse digital projects, ensuring robust performance and security standards.
  \- Advised stakeholders and external partners on technical feasibility , ensuring the robust implementation of third-party APIs based on defined technical concepts.
- **Backend Developer at WhoFinance GmbH** (2015 – 2015)
  \- Spearheaded the legacy migration of a large-scale PHP codebase into a modern, structured application using Symfony 2 and Doctrine ORM.
  \- Designed complex database schemas and optimized data access layers to handle high-frequency financial data queries.
- **Student Worker at piobyte GmbH** (2013 – 2014)
  \- Developed and implemented web application features using Java (Spring MVC) and PHP (Symfony 2), gaining early cross-language backend expertise.
  \- Enhanced software reliability by creating and extending unit tests, contributing to the establishment of automated testing workflows for active projects.
  \- Contributed to full-stack development tasks, supporting the team in delivering both frontend and backend requirements for client solutions.
- **Software Engineer at Basilicom GmbH** (2020 – 2021)
  \- Developed enterprise-grade web applications leveraging Symfony 4 and Pimcore, specializing in complex data modeling and infrastructure.
  \- Streamlined requirements analysis processes, bridging the gap between stakeholder needs and technical implementation.
  \- Optimized backend performance for data-heavy applications, ensuring efficient processing within complex infrastructure environments.
  \- Collaborated on full-stack initiatives (at earlier stage), managing both frontend requirements and backend stability.
- **PHP Backend Entwickler at interactive tools GmbH - Digitalagentur** (2021 – present)
  \-  Architected and maintained high-traffic enterprise platforms for key accounts using PHP 8 and Symfony, focusing on scalability and clean code architecture.
  \- Technical requirement analysis and translated complex business logic into high-performance backend services.
  \- Engineered custom admin & shop integrations and successfully executed full-scale platform relaunches for major enterprise clients.
  \- Acted as the technical point of contact, coordinating seamless integrations between customers and third-party service providers.
  \- Delivered annual recurring digital events by ensuring infrastructure stability and backend readiness for peak traffic loads.
- **Software Engineer at Basilicom GmbH** (2018 – 2019)
  \- Developed enterprise-grade web applications leveraging Symfony 4 and Pimcore, specializing in complex data modeling and infrastructure.
  \- Streamlined requirements analysis processes, bridging the gap between stakeholder needs and technical implementation.
  \- Optimized backend performance for data-heavy applications, ensuring efficient processing within complex infrastructure environments.
  \- Collaborated on full-stack initiatives (at earlier stage), managing both frontend requirements and backend stability.
  \- Contact persons for customers and third parties.

## Education

- **Fachhochschule Brandenburg** — Bachelor of Applied Science (B.A.Sc.) (2011 – 2014)

## Skills

- Pimcore
- Twig
- Doctrine
- Java Enterprise Edition
- Smarty
- Webentwicklung
- Java
- Scrum
- PHP
- Symfony
- Git
- Docker
- Python
- Spring Framework
- MySQL
- Kanban
- Yii  Framework
- REST
- Symfony Framework
- Teamwork
- Swagger
- Vagrant
- Web-Entwicklung

## Certifications

- Next.js App Router Fundamentals — Vercel (https://nextjs.org/learn/certificate?course=dashboard-app&user=69545&certId=dashboard-app-69545-1759152418257)
- Next.js Pages Router Fundamentals — Vercel (https://nextjs.org/learn/certificate?course=pages-router&user=69545&certId=pages-router-69545-1759911426622)

## Volunteering

- Ehrenamtlicher Helfer at Naturschutzzentrum Krugpark

## Languages

- Deutsch (native)
- Englisch (professional_working)