Ivan Ortiz

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E

SENIOR BACKEND ENGINEER

EPAM Systems.

Jan 2020 - Aug 2025 (5 years 8 months)

• Architected and maintained PostgreSQL databases — optimizing queries and schema design, reducing slow query counts by 45%. • Implemented Redis caching to accelerate frequently accessed data, reducing database load and improving page response times by over 60%. • Built and operated data pipelines with Apache Airflow, ensuring reliability, monitoring, and automated retries. • Collaborated with data and frontend engineers to integrate backend services with ML-driven and React-based applications. • Crafted the overall solution architecture featuring a network of microservices orchestrated via Kubernetes, integrating CI/CD pipelines and containerized deployments using Docker. • Developed production-grade Python microservices, leveraging
FULL-STACK ENGINEER

Olo

Apr 2018 - Oct 2019 (1 year 7 months)

• Implemented a new version of checkout supporting recurring subscriptions using React and microservices built in Node.js, Typescript, and GraphQL. • Contributed to data pipeline automation and integration with ETL workflows. • Collaborated with senior analysts and cross-functional Agile teams to enhance product discovery and customer experience, ensuring that software features meet evolving user requirements. • Developed a customer-facing command-line query interface in Python for a NoSQL data warehouse product, leveraging Linux CLI tools to deliver efficient and interactive user experiences.
BACKEND ENGINEER

Groupon

Jun 2017 - Feb 2018 (9 months)

• Assisted in backend development using Flask and Python, supporting large-scale e-commerce applications. • Resolved approximately 30% of reported bugs, improving stability and customer experience. • Implemented and automated server deployment and service configuration in Bash.

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