Hi, I’m Leonel Espinal . I am a software developer based in LA.

Data Engineer

Ensured efficient data integration and transformation process by automating dynamic task creation, status tracking, and error handling, significantly enhancing the operational efficiency of data pipelines. Automated processes to save task results and performance metrics to PostgreSQL databases, facilitating comprehensive reporting and analysis of ETL workflows. Utilized Python and Airflow operators to manage PII data operations, dynamic scope name generation, session handling, and operation polling, enabling seamless data flow and integration across multiple systems and environments. Implemented automated task duration tracking and real-time error detection mechanisms to monitor and improve data pipeline performance, resulting in a 30% reduction in data processing time and enhanced data quality. Implemented ETL workflows using SQL SSIS and SAP BODS to automate tasks for data cataloging and Torch Analytics Platform.​

Junior Software Engineer

Managed and refactored monolith legacy codebases, facilitating modularization and migration to microservices architecture to improve agility and team scalability. Designed and implemented a proprietary identity provider using OAuth2 for centralized authentication and authorization across multiple applications, enhancing security and user management capabilities. Engineered a reusable and scalable Serverless stack for real-time alerting, including response plans and escalation workflows, optimizing resource utilization and ensuring high availability. Reducing costs by 65% compared to previous 3rd party stack (NewRelic + PagerDuty). Created comprehensive documentation and conducted training sessions for client teams on newly implemented technologies and architectural patterns. Led the architecture design and development efforts for projects using PHP, Python, React, and Serverless technologies, ensuring scalability, maintainability, and performance optimization.

Junior Software Engineer

Participated in incident response activities for application security incidents. Worked on several microservices and automated testing tools to support the development ecosystem at Indeed. Evaluated and managed security tools and technologies to improve the detection and prevention of vulnerabilities. Developed automation processes, deployments, and maintenance activities using Docker and Jenkins. Remediated all findings from security audits, ensuring compliance with industry standards and enhancing overall system security.

Software Engineer

Configured and led support for software build/deploy pipelines in AWS.Managed and optimized automation tools to reduce time and complexity of system operation tasks using Python.Led the deployment and configuration of virtual machines using Jenkins, Terraform, AWS, and Kubernetes.Troubleshot production issues with a focus on AWS infrastructure.Automated labeling processes and created plug-and-play tools utilized across the Scaled Operations organization using TypeScript, Python, and Pandas. Provided support of standard and customized deliverables for Scaled Operations’ business analysts. Streamlined advertiser moderation and web scraping efforts for the SMB team. Delivered BI analysis on CPC and CPI to improve monetization using Python, Pandas, and scikit-learn.