Kamil – Python, Django, REST API

An AI-powered automation accounting software used by some of Europe's biggest companies.

• Led a feature team of 10 to develop the leading accounting software in the DACH region;
• Made substantial performance improvements and reduced tech debt;
• Created and maintained automatic quality control of AI's predictions using historical data and dynamic rule sets;
• Developed LLM integration for OCR, data extraction, and reflection;
• Improved internal and public APIs security and performance;
• Contributed to the architecture and infrastructure of a distributed web application.

A product development consultancy that helps customers with tight deadlines reliably deliver software.

• Was responsible for end-to-end software design & delivery;
• Provided Django expertise;
• Helped with performance optimizations and tech debt reduction.

A SaaS application aimed at business customers looking to provide "workation" as a benefit to their employees. It provides the management with tools to grant their employees days to spend at the apartment of their choice in different locations, and the employees with a nice interface to choose and book the apartments from.

• Created the Figma mockups and wireframes;
• Created the backend functionality;
• Designed the frontend architecture;
• Lead frontend developers through the frontend development process;
• Designed the infrastructure and created the deployment process.

A US-based SaaS application that serves as a document management tool, as well as an automation system that protects businesses from audits and lawsuits.

• Redesigned the software architecture to achieve better performance under high load, as well as to improve maintainability;
• Replaced insecure and unsupported dependencies with custom-written Python libraries;
• Fixed various security vulnerabilities as well as introduced additional security mechanisms, such as MFA and geo-blocking.

While working with B3, Kamil has done a multitude of projects, mostly in the sports (booking & management), banking, and insurance industries. Those projects were done for large enterprises or the Polish government, which meant he had to make sure that the software was reliable, secure and could efficiently handle tens of thousands of users simultaneously.

Even though he was hired as a Python developer, Kamil has worn many hats while working for B3.

• Designed, deployed, and developed multiple high-availability systems for Poland's biggest finance and sports companies;
• Designed and built CI/CD solutions and cloud-native infrastructure;
• Created reliable and performant integrations with REST and SOAP APIs;
• Designed the architecture and developed the functionality for a secure and performant eCommerce selling process;