Built and maintained large-scale ETL/ELT pipelines to ingest, transform, and model transactional payment data into Redshift for analytics, risk, and compliance reporting. Developed high-performance data extractors and ingestion processes in Java, Python, and Scala using Hadoop/Spark, improving data freshness and reliability across Customer Success analytics. Administered and optimized Amazon Redshift warehouses, including clustering, sort keys, and resource usage tuning, to keep mission-critical dashboards performant. Designed and published KPI dashboards and self-serve analytics in Tableau, Mode, Periscope, and Sisense for stakeholders in Operations, Product, and Compliance, enabling data-driven decisions. Performed deep-dive root cause and trend analysis on customer support, conversion, and transaction flows, proactively surfacing insights to leadership. Documented data models, tables, and ownership; trained internal stakeholders on using dashboards and interpreting metrics, increasing adoption of analytics outputs.

Maintained and extended the core Karplus system (enterprise platform for internal operations), delivering new features and stability improvements for critical workflows. Implemented enhancements across backend services (Maven, Spring, Hibernate, JBoss) and developed new UI components using JSF/PrimeFaces, improving usability for internal users. Built and deployed mobile-facing views for Karplus to support field and branch users. Administered and tuned PostgreSQL databases supporting the platform, including performance fixes for high-volume queries. Delivered reporting using Jaspersoft Server and created structured documentation and user training material to support onboarding and change management across departments.

Built and enhanced internal and client-facing applications using .NET (Visual Studio 2012 / 2015), and delivered new features on short iteration cycles based on business requests. Developed and maintained Android applications to extend key product functionality to mobile users. Investigated and resolved production issues for clients and internal stakeholders, acting as first-line technical escalation. Managed SQL Server databases (2008, 2012, 2014), including query optimization and data integrity tasks. Produced Crystal Reports (SAP 13) for finance, ops, and management teams, enabling executive reporting without manual data work. Wrote technical documentation, prepared demos, and trained customers to adopt new features with minimal friction.

Delivered changes and upgrades to COBIS (core banking platform), ensuring continuity in mission-critical banking operations. Acted as DBA for Oracle and SQL Server environments, performing tuning, troubleshooting, and maintenance to keep systems performant and compliant. Built custom internal applications and automation utilities to streamline back-office processes for finance and operations teams. Supported bank staff across departments, resolving incidents quickly to reduce business impact and service interruption.

Administered core IT infrastructure: user accounts, file servers, network resources, backup routines, and endpoint security for a multi-office public institution. Managed hardware and software inventory at scale (PCs, printers, peripherals, licensed software), ensuring compliance and audit readiness. Implemented and maintained backup policies and recovery procedures, reducing data loss risk and improving business continuity. Performed preventive maintenance (hardware and software), including antivirus management, capacity cleanup, and troubleshooting to minimize downtime. Supported merger- and incident-related escalations to keep operations running during organizational changes.

Audited core IT processes and infrastructure controls, helping align operations with internal policy and governance requirements. Performed walkthroughs, risk assessments, and test plans for key IT processes; tracked remediation and drove follow-up on corrective actions with system owners. Standardized IT procedures and documentation to improve accountability, repeatability, and compliance. Assisted end users with corporate network access to shared systems and coordinated with process owners to address gaps in control and service quality.