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Kai BarzenKB

Kai Barzen

Senior Fullstack Developer

€680/day
Trier, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Kai

Freelance Software Engineer for Web & Cloud with international project experience

Specializing in AWS, TypeScript, and React with a strong focus on Clean Code

Expert in Rapid Scaling, MVP Development, Prototyping, and Performance Optimization
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Trier (up to 50km)

Experience

  • Porsche Digital
    Fullstack Developer
    AUTOMOBILE
    July 2024 - October 2025 (1 year and 3 months)
    Stuttgart, Germany
    Fintech & Customer Journey Optimization

    - Development of systems for creating offers and financing Porsche vehicles in the USA and EU
    - Development of comprehensive tax calculation systems for the entire US market
    - Consulting on user journeys and extensive A/B testing
    - Design of a microfrontend architecture and performance-oriented optimization
    TypeScript AWS React.js Next.js Datadog
  • Porsche Digital
    Fullstack Developer
    AUTOMOBILE
    June 2022 - June 2024 (2 years)
    Stuttgart, Germany
    Electrification & Charging Contracts

    - Development and management of systems for lifecycle management of over 100,000 charging contracts for electric and hybrid vehicles, and monthly billing of over 200,000 time-based charging data
    - Vertical integration into 21 teams for full integration into the Porsche ecosystem from production in the factory to application in the vehicle
    - Development of a highly available and highly scalable architecture for 20 million monthly calls while adhering to strict SLA requirements
    - Effective management of fluctuating requirements under the strictest deadlines
    TypeScript React.js AWS DynamoDB Apache Kafka
  • Unimed
    Lead Software Developer
    PHARMACEUTICALS INDUSTRY
    August 2021 - May 2022 (9 months)
    Wadern, Germany
    Medical Evaluation

    - Leadership and development of advanced PDF workflow tools for the evaluation and analysis of medical records
    - Performance optimization for processing medical records in the multi-gigabyte range
    - Analysis and direct customer consultation on process optimization
    - Team coaching in React and TypeScript
    TypeScript React.js MobX Kubernetes Docker

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Education

  • Application Development
    Volksfreund
    Anwendungsentwicklung

Skill set

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