Jan Marcol Email & Phone Number

• Building distributed microservice applications for pricing financial derivatives products and calculating credit valuation adjusted risk of exposure between counterparties.Developed robust, scalable, and maintainable full-stack applications with a focus on the mathematical analysis, processing, and visualization of complex datasets. Implemented algorithms for advanced data modeling, enabling the generation of real-time insights and graph-based visualizations to support data-driven decision-making across teams.• Led and facilitated agile processes within cross-functional teams, running daily scrums, sprint planning, and retrospectives, fostering continuous improvement and aligning team efforts with project goals. Tech stack: C#, .Net, RabbitMq, React, EntityFramework, Plotly, GitLab, Teamcity, Azure

Kraków Area, Poland

• Developed in-house single page applications to automate and streamline error prone manual processes. Collaborated closely and directly with stakeholders and users to gather requirements for new features and products, designing efficient, reusable solutions that reduced development time and optimized resource usage. • Ran summer internships programs mentored junior developers and led the development of standalone applications with clearly defined scope that delivered actual business value within the timed scope of the summer programTech stack used: C#, React, .NET, SQL, Sql Server, MongoDb, python

Kraków Area, Poland

• Developed high level Integration and Acceptance tests for daily regression test runs. Tests are treated as first class citizens and adhere to the same code standards and review process as production application code.• Created advanced aggregation and analysis tools to summarize the daily companywide regression test runs, combining result from various separate test suites into readable graphs and tables to enhance the visibility of test results and facilitate quicker feedback loops. • Used in-house applications, automated Ruby scripts, HP Automation Studio and SQL queries to create and maintain production-grade test data to enable running full-scale company processes in pre-production environments and ensuring the accuracy of automated end-to-end testing, to identify critical issues before release.Tech used: JavaScript, Ruby, C#, Playwright, Selenium, Specflow, Jasmine Protractor, Cypress, Ruby Cucumber, PostgreSQL, Sinatra