• Designed and deployed an SMS-based two-factor authentication module using Spring Security, hardening system authentication and closing a critical security gap across the healthtech platform's user base. • Built and integrated a billing-reprocessing module that significantly reduced manual intervention, automating exception-handling logic across Oracle, PostgreSQL, and Informix within multi-database Spring Boot microservices.

• Led the migration and secure visualization of digital signatures used in check payments by implementing AES-256 encryption in a .NET 8 microservice, strengthening data confidentiality and regulatory compliance. Deepening my expertise in applying encryption standards within regulated financial environments, and reducing compliance risk while reinforcing trust in check-payment security. • Integrated 7 new .NET 8 microservices with the bank's C++ core banking system (built on an internal framework) through close cross-functional collaboration, enabling real-time query services within the hybrid architecture. Strengthening my ability to bridge modern .NET services with a legacy core. • Led development of credit card payment integration across 2 critical back-office applications, the web teller platform used across bank agencies, and the banking-agent network, integrated with an accounting module built in Java. Growing my leadership in coordinating complex, multi-system integrations end-to-end, and expanding secure payment capability across the bank's full network. • Developed and optimized backend services in C++, C#, SQL Server, and Azure, achieving measurable performance improvements. Reinforcing my versatility across legacy and cloud-based backend technologies, and delivering measurably faster, more efficient services for core banking operations.

• Designed, developed, and maintained Java-based backend solutions within the NetCracker OSS/BSS platform, supporting telecommunications clients across multiple geographies with complex provisioning and billing logic. Deepening my expertise in large-scale telecom system architecture, and accurate service delivery across regions. • Delivered reliable, high-performing Java applications built on Object-Oriented Design (OOD) principles and SOLID design patterns, sustaining an international CSAT score of 4.3/5.0 across quarterly customer satisfaction surveys. Reinforcing client trust across international accounts. • Collaborated with distributed Agile squads to deliver iterative feature releases aligned with detailed technical specifications, maintaining code quality through structured code reviews. Strengthening my cross-team collaboration across distributed squads, and helping sustain consistent, on-time delivery for stakeholders.

• Developed and integrated an audit module for a credit system in Java, Flutter, and PostgreSQL, enabling web-to-mobile communication via web services and RESTful APIs and accelerating audit completion time. • Integrated a password-encryption module across 3 systems, credit, inventory, and pharmaceutical, strengthening data security and system reliability across all three platforms. • Integrated a password-encryption module across 3 systems; credit, inventory, and pharmaceutical. Strengthening data security and system reliability across all three platforms. • Built a QR-code scanning feature for the mobile credit application using Flutter and SQLite, reducing data-query time against the core credit system.