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Sebastian P.SP

Sebastian P.

PHP Software Developer

€720/day
Kötzting, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sebastian

Experienced software developer specializing in backend development and complex system architectures. In my previous projects, I have successfully worked on the conception, development, and optimization of backend solutions designed for automation, scalability, performance, and reliability.
With my passion for clean code and efficient solutions, I am the right contact person for demanding projects that require technical expertise and flexibility.
  • Polish

    Native or bilingual

  • English

    Conversational

  • German

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • -
    Development of a CRM system for the real estate industry
    January 2025 - Today (1 year and 5 months)
    Conception and planning of the CRM architecture and main functions
    Development with Laravel for the implementation of system logic and backend functionalities
    Implementation of search and filter functions as well as integration of databases for efficient data storage
    Design and optimization of the user interface with Blade and Tailwind CSS for a simple and user-friendly experience
    Development of security features to ensure data protection and data security
    Continuous improvement of the system and expansion of functionalities
    www.propertycloudcrm.com
    Laravel 11 PHP8 MySQL Ubuntu Server Tailwind HTML Git Stripe
  • Energiewirtschaft
    Software Engineer
    ENERGY AND UTILITIES
    October 2020 - December 2024 (4 years and 3 months)
    Leipzig, Germany
    In my job in the core department, I significantly contributed to the optimization of system processes. Among other things, I developed a system for managing cron jobs, where individual crons could be configured to block others until they were completed, thus avoiding resource bottlenecks and conflicts. Furthermore, I implemented a solution for the efficient repetition of failed events to ensure the reliability of data processing. I also worked on extending the core system, optimizing and expanding the GDPR module, as well as implementing a delay and blocker for API requests.
  • Ecommerce
    Senior Software Developer
    E-COMMERCE
    May 2017 - September 2020 (3 years and 5 months)
    München, Germany
    Development of new features for several online shops. This included, among other things, the integration of the shop system's API into a native shopping app and the implementation of a CRM interface that enabled the onboarding of our customer cards. I also worked on an interface for connecting an external Typo3 system to the existing shops. Further tasks included the integration of payment service providers such as Amazon Pay and Przelewy 24, the implementation of a secure login system using FIDO USB dongles, and the development of a special login system for customer service.

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Education

  • Diplom-Wirtschaftsinformatiker (FH)
    University of Wismar
    2010

Skill set (35)

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