03/11/2026 updated
KC
100 % available
Senior Application Support Engineer|SQL, PL/SQL|ETL & Data Migration|Banking & Transaction Systems
Kent, United Kingdom
Only remote
BSc (Hons) Computing Studies (Information System)About me
With over 20+ years of experience delivering and supporting high-volume transaction systems across banking and enterprise environments. Strong background in ETL development, data migration, and SQL diagnostics in banking transformation, payment platforms, and enterprise reporting systems.
Application Programming Interfaces (APIs)Financial Data AnalysisTechnical SupportAtlassian JiraMicrosoft AzureBankingData ArchitectureData ValidationExtract Transform Load (ETL)Data TransformationData MigrationDebuggingProgramming ToolsPayment SystemsFinancial Systems
Oracle Database Development
Oracle SQL, PL/SQL, Packages, Triggers, Stored Procedures expertise with over 20 years of experience in high-volume transaction systems
ETL Development and Data Migration
ETL Development, Data Migration, Data Transformation specialization supporting core banking transformation and payment systems
Banking and Financial Systems
Core Banking Platforms, Payment Processing, Financial Data Reconciliation experience across enterprise environments
Database Performance Optimization
SQL Optimisation, Execution Plans, OLTP Performance Tuning for enterprise reporting systems
Production Support and Diagnostics
Log file and SQL Diagnostics, Data Validation, Root Cause Analysis for mission-critical systems
Integration and API Development
REST APIs, JSON data exchange, API debugging, Postman for system integration projects
Reporting and Data Architecture
Oracle Reports, Data Architecture design for enterprise reporting across international operations
Development Tools and Platforms
Oracle Forms, Oracle Reports, Zendesk, Jira, Azure DevOps, GitHub for application development
Oracle SQL, PL/SQL, Packages, Triggers, Stored Procedures expertise with over 20 years of experience in high-volume transaction systems
ETL Development and Data Migration
ETL Development, Data Migration, Data Transformation specialization supporting core banking transformation and payment systems
Banking and Financial Systems
Core Banking Platforms, Payment Processing, Financial Data Reconciliation experience across enterprise environments
Database Performance Optimization
SQL Optimisation, Execution Plans, OLTP Performance Tuning for enterprise reporting systems
Production Support and Diagnostics
Log file and SQL Diagnostics, Data Validation, Root Cause Analysis for mission-critical systems
Integration and API Development
REST APIs, JSON data exchange, API debugging, Postman for system integration projects
Reporting and Data Architecture
Oracle Reports, Data Architecture design for enterprise reporting across international operations
Development Tools and Platforms
Oracle Forms, Oracle Reports, Zendesk, Jira, Azure DevOps, GitHub for application development
Experience
Professional experience10+ years
Freelancer since2026
Languages
ChineseNative speakerEnglishFluent
Project history
Provided L2/L3 production support for enterprise laboratory workflow software used by global pharmaceutical and life sciences organisations. Resolved 26+ production incidents per month while maintaining 100% SLA compliance.
Acted as technical project lead for enhancements to HR and wholesale food supply systems, coordinating vendors and internal stakeholders to deliver system improvements.
Seconded into a core banking transformation project, working in Interface & Migration team supporting the migration and interface alignment between Temenos T24 and the Payments platform.