Pavel Kolesnikov Email & Phone Number

Kraków, Pl

Cracow, Małopolskie, Poland

Working on something big at a highly promising startup. That's all I can share for now.

Cracow, Małopolskie, Poland

- Developed and maintained back-office pages and components using React, TypeScript, HTML5, and CSS, enhancing user experience for internal teams.- Built and optimized backend services using Python and Django, ensuring seamless integration with the frontend.- Improved API integrations with platforms such as Shopify and HubSpot, cutting synchronization time.Built a new service for interacting with the Vinted API, using Node.js, TypeScript, Cron jobs, Prisma ORM, and PostgreSQL.- Improved local development environment by integrating Ngrok for secure local tunneling and Supervisord for managing background processes, boosting developer productivity.

Cracow, Małopolskie, Poland

- Developed and maintained a scalable e-commerce microservice supporting two major company products, leveraging Python, Django, PostgreSQL, Elasticsearch, and AWS.- Automated ETL processes, extracted data from PostgreSQL, transformed it for Elasticsearch, and updated indices via scheduled tasks, ensuring seamless synchronization.- Migrated Elasticsearch to a new version with Kubernetes, maintaining zero downtime and improving query performance by 20%.- Built modular integrations for external marketplace APIs, unifying catalog hierarchies and automating weekly updates via RabbitMQ.- Optimized PostgreSQL JSONB queries with JsQuery and GIN indexes, significantly improving performance for searching and managing 10M+ product attribute values.- Streamlined CI/CD pipelines with GitLab, Jenkins, and automated tests, enhancing deployment speed and code quality.- Collaborated with a cross-functional team to deliver scalable solutions, optimize performance, and support 100+ active clients monthly.

- Maintained a mission-critical automated banking system supporting 2,000+ daily active users and managing a 1 TB database, leveraging Python, SQL, PL/SQL, Ansible, Jenkins, Grafana, and Kibana to ensure seamless operations.- Resolved complex issues as part of the second-line support team, handling escalated tickets, managing incidents, and improving user satisfaction through timely solutions.- Streamlined deployment processes in test and production environments, collaborating with business teams to enable reliable and efficient application updates.- Configured and optimized Kibana and Grafana dashboards, metrics, and alerts to enhance system monitoring and deliver actionable performance insights.