Fabio Fernández

3+ years of experience in fintech and high-transaction payment systems. Focused on large-scale data analysis, observability, and operational data management in critical production environments. Proficient in Databricks, PySpark, SQL, and Grafana, with strong hands-on experience in complex data querying, building visibility tools, troubleshooting data flows, and incident response. Building data pipeline solutions through hands-on engineering projects.

Data Operations & Monitoring Analyst - Payment Systems at PayRetailers (2022-12 – Present)

• Worked alongside the SRE team to achieve a 50% reduction in false positive alerts by refining monitoring logic and production telemetry analysis.
• Built multiple Grafana dashboards to monitor data flows and transaction pipelines in production, reducing monitoring load time and improving operational response.
• Designed a transaction data observability dashboard mapping each pipeline step with timestamps, status and TraceIDs, enabling faster root cause analysis across distributed payment data flows
• Investigated production incidents by querying large-scale transactional datasets using SQL (MSSQL, Databricks) and PySpark, identifying anomalies and operational trends impacting system reliability.
• Performed real-time monitoring and proactive incident response using Azure App Insights, Grafana, Elastic, and Opsgenie in critical production environments.
• Actively participated in incident war rooms, providing operational data analysis and actionable insights for rapid resolution.

Operations Analyst - Fintech at PayRetailers (2022-12 – 2022-12)

• Achieved 90% SLA adherence consistently, ensuring timely resolution of incidents and requests.
• Contributed to the SQL tool adoption with analysis and monitoring tools as the team scaled.
• Promoted from Jr to Analyst within the first year based on performance, taking on expanded responsibilities in data analysis with SQL, monitoring and observabilty.
• Generated business insight reports using SQL Server queries that helped the operational decision-making
• Investigated and resolved technical issues using advanced troubleshooting and testing techniques.
• Real-time data flows monitoring and observability across the platform identifying critical incidences and reporting accordingly.
• Performed REST API integration analysis, including request/response payload debugging, data structure validation, and test validation to ensure data integrity across payment integrations.

Healthcare Provider at Varios (2014-04 – 2022-01)

• Roles in emergency care and vaccination operations.
• Developed triage, escalation, and cross-team coordination skills.

NOC Operator at Telecom Argentina (2011-03 – 2012-07)

• Proactive monitoring of servers and services using Nagios and Microsoft Operation Manager.
• Network management and Linux environments.

System Engineering in System Engineering – Universidad Tecnológica Nacional (2019-01)

Data Engineering in Data Engineering – Data Engineering Mentorship Program (2026-01 – 2026-04)

Healthcare Science Diploma in Healthcare Science – Cruz Roja (2011-03 – 2013-12)