Project: Software to help productize digital signing & KYC solutions As a full-stack developer (with a backend dominance) I was responsible for the following during my 2 years in the project: - Design and implementation of RFC-compliant OAuth 2.0 server in Node.js and Fastify framework. It allows multiple clients to build their integrations in a standardized manner - Development of existing integration with 3rd party accounting software, including optimizations, improving user experience, bug fixing - Building prototype of developer portal (Node.js and Nest.js framework) - Evaluation and adoption of tools for application monitoring (OpenTelemetry, Amplitude) - Participation in making architectural decisions, and documenting them Tools that were built and maintained during cooperation with the client prepared our client's main software to be integrated with various solutions on the market and thus widely recognized and used.

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Project: Web interface and integrations for AI-based engine for sales pricing proposals. My main responsibilities during a 4-year long collaboration as full-stack developer consisted of: - Analysis of business requirements and making sure that business rules stay clear and consistent across the whole system - Implementation of API (Node.js) and web UI (Angular.js and React.js) of the web application. Views in the UI included complex calculations and charts. It gave managers better insight into sales efficiency and supported decision-making. The application also used SocketIO for notifications. - Implementation of integration with the client's SAP system - Collaboration with infrastructure and database team in building highly efficient database schema (PostgreSQL - views, indexes) that was able to respond within seconds to complex aggregation queries Developed software gave sales agents and sales managers nice tool for their everyday work and allowed the client to make real profits. Good relations with the client allowed us to involve a group of interns in a small, side project and I was their mentor.

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Project: Extension for e-commerce platform - online configurator for customizing premium lamps (color, material, size, light source, wireless control). Created configurations can be ordered, saved, or shared. I worked in a project for about two years and, as a full-stack developer and scrum master, I was in charge of: - Analyzing business requirements and discussing them with the client - Translating characteristics of product components into software models - Implementing integration with the existing e-commerce platform and social media using JavaScript (Angular.js) and Java (Spring Framework) - Organizing the team's everyday work As a result of the project, we created a neat configurator that was consistent with the company's visual identification for a seamless user experience and allowed the client to effectively reach individual clients.

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