Marek Czaplicki Email & Phone Number

Responsible for:· Preparing roadmaps· Hosting backlog refinement & planning sessions· Guiding developers· Developing in-company code practices· Still coding :DAchievements:· Conducted internal Grafana Loki training, enabling both technical and non-technical staff to effectively read required logs.· Reduced database cluster CPU usage by 50% through indexing tables, significantly lowering the database server's monthly costs.· Optimized numerous CPU-/Memory-intensive SQL queries, enhancing overall system performance.· Led internal PGAnalyze training, empowering developers to independently identify and troubleshoot problematic queries.· Developed CI steps to minimize manual work required post-application releases.· Dockerized/Containerized local and pipeline environments, ensuring local development closely mirrors the production cluster, thereby catching errors before deployment.· Maximized Python's Event Loop for performance improvements, ensuring compliance with TSO's FCR requirements.· Introduced Škoda API integration and designed an architecture for future integrations, increasing the number of controllable cars and simplifying integration with other car manufacturer APIs.· Co-prepared an ORM-free Architectural Pattern based on the Layered Pattern, facilitating easier location and organization of new and existing code for developers.· Refactored Local Battery and Big Battery projects according to the new Architectural Pattern, improving code structure and maintainability.Disclaimer: some of the above are team effort achievements.

Mostly responsible for developing and maintaining Big Battery (https://www.trueenergy.io/big-battery/).Achievements:· based on the requirements designed, structured and coded a production-ready code that works on daily basis· improved performance of the code (code runs faster by three orders of magnitude - verified using code profiling)· modified algorithms to comply with new requirements· Refactoring and maintaining core part of the system.Achievements:· Developed an adapter to facilitate a seamless transition between two libraries, addressing a critical bug in the older library.· Optimized core event source code, reducing event latency by three orders of magnitude and enabling parallel event handling.· Enhanced the performance of numerous SQL queries.· Implemented linters and formatters to improve code quality.· Reduced database cluster CPU usage from ~100% to 25-30% by optimizing or eliminating resource-intensive queries.· Further reduced database cluster CPU usage from ~30% to ~15% by adding indexes to key tables.· Designed the architecture for True Solar (https://www.trueenergy.io/true-solar/) and guided the development team to ensure the project stayed on the right track.

Gdańsk, Woj. Pomorskie, Polska

Gdańsk, Woj. Pomorskie, Polska

Teaching kids and adults basic and advanced skiing techniques. Theoretical and practical parts.

Gdańsk, Woj. Pomorskie, Polska

Pow. Tczewski, Woj. Pomorskie, Polska

Developer responsible for personalization of SIM and USIM cards, data processing, process automation and tools development.

Gdańsk, Woj. Pomorskie, Polska

As an archivist I have been responsible for sorting, managing and destroying documents and archives in the public and private sector firms.

Gdańsk, Woj. Pomorskie, Polska

Responsible for helping and taking care of customers. Leading personal trainings.