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Karol Piotrowski

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Lublin, Lublin Voivodeship, Poland

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Résumé

Jobs verified_user 0% verified
  • Consensys
    Senior Backend Developer (Remote)
    Consensys
    Jun 2021 - Current (5 years 3 months)
    Architected scalable backend services using Node.js and Python, supporting high-volume SaaS platforms with global user bases. Engineered robust RESTful APIs enabling seamless integration between internal systems and third-party customer service tools. Optimized complex SQL queries across PostgreSQL databases, reducing response times by over 35 percent under peak workloads. Designed flexible data schemas leveraging NoSQL solutions to support dynamic and evolving customer data requirements. Implemented asynchronous processing mechanisms to improve system responsiveness and ensure reliable background task execution. Refactored legacy backend components into modular microservices improving maintainability and deployment flexibility. Integrated
  • UCB
    Software Engineer
    UCB
    Jun 2018 - Apr 2021 (2 years 11 months)
    Developed backend modules in Java and Python supporting enterprise customer management platforms. Constructed and maintained scalable REST APIs for integration with internal and external business systems. Managed relational databases using advanced SQL techniques to ensure data consistency and optimized performance. Implemented NoSQL storage solutions to handle unstructured data and high-throughput workloads. Enhanced system reliability through systematic debugging and structured error-handling strategies. Designed data validation layers safeguarding integrity across customer-related transactions. Automated deployment workflows aligning with remote collaboration and distributed development practices. Collaborated closely with support teams
  • R
    Software Developer
    Razor Lnc
    Mar 2014 - May 2018 (4 years 3 months)
    Built backend systems using Node.js, Python, and Java to power customer-focused SaaS applications. Designed and optimized relational database schemas using SQL to support high-volume transactional workflows. Integrated NoSQL databases for flexible content storage and rapid feature iteration cycles. Implemented secure API endpoints enabling communication between frontend interfaces and backend services. Structured backend logic to support scalable customer service and ticket management processes. Automated data synchronization between services ensuring consistent and reliable customer information. Improved query efficiency through indexing and systematic database performance analysis. Participated in agile development cycles delivering incre
Education verified_user 0% verified
  • Nanyang Technological University
    Bachelor of Computer Science
    Nanyang Technological University
    Jan 2011 - Jan 2015 (4 years 1 month)
    Singapore