Ruslan Matusevych

Background

About Ruslan Matusevych

Full-Stack Developer | Angular | React | Ruby | Python Tech Stack: Ruby, Ruby on Rails, Python, FastAPI, JavaScript, Angular, React, HTML5, CSS3, RESTful APIs, SQL, Git, Agile Methodologies, AWSExperience in the last project:• Rapidly gained Trailblazer and Angular expertise to design and implement Teams features, helping 100+ enterprise clients manage detailed employee document access at scale.• Developed and deployed a complex document processing workflow with recursive parsing and tree-structure storage, allowing ingestion of over unstructured documents and directly contributing to acquiring two new clients.• Improved critical SQL queries for the analytics portal, reducing response times from 1 minute to 10 seconds through self-taught performance tuning techniques, including indexing, query restructuring, and analyzing execution plans.• Created an automated financial analysis pipeline using LLM APIs (GPT-4/Claude) to extract and summarize key performance metrics from company reports, structuring and storing results in a relational database for client access.• Increased system stability by developing comprehensive unit tests that raised test coverage by 10%(from 70% to 80%), enabling earlier detection of critical bugs during development.• Migrated over 100 million database records from PostgreSQL to Redshift with strategic denormalization, achieving an 85% reduction in query response time (from 1-2 minutes to 10-20 seconds) for analytics workloads.