Lenur Serveriiev

Deutschkurs lernen, open source and freelance commitments.

Wholesale Risk Management System. - Accomplished a PoC, which aimed at a comparison between reactive and non-reactive stacks. According to the benchmark results, the throughput of the non-reactive stack was 640 RPS. It managed 100000 loans per hour. - Designed 3 aggregates(DDD). The main challenge was to identify the number of aggregates, boundaries, and relations between aggregates. - Built a solution that efficiently scaled 20 projections without relations issues between aggregates.

Retail Platform. - Improved the codebase by 40% and reduced the delivery time of the new features by 60% by adding additional code checker jobs to the CI/CD pipelines, code review, and refactoring. - Contributed to the architecture: created 10 decision logs, and designed GraphQL API for 15 microservices. - Maintained 15 microservices, including product search, product management, taxonomy, and branch management, resulting in improved system efficiency and enhanced user experience.

Data pipeline platform. - Created a data pipeline framework to manage the Apache Nifi pipelines via predefined DSL. The solution automated the management of the 30 data pipelines. - Implemented Spring starters to streamline the application startup process, loading application properties from AWS and Vault. Result: Increased flexibility of CI/CD pipelines and reduced deployment time by 50%. - Migrated the Python scripts into Ansible modules, automating for 100% the CI/CD of the Apache NiFi pipelines.

Lead Verification Platform. - Optimized the performance of the SQL queries, leading to a 40% reduction in system response time - Implemented a custom database migration tool, which applied the DDL migrations within 2 minutes for the big-size (~1TB) tables - Architected and developed a landing page application within 4 months. The application could simultaneously create and update 400 landing pages for 5 minutes via a predefined format in the Excel files.