Building reliable financial systems at scale.

Zuora Billing Service Integration · Sage — Global Enterprise Software

• Architected and integrated order management microservices on Dropwizard (Java 21) with Zuora Billing, enabling end-to-end subscription, invoice, and payment workflows; deployed via Terraform IaC across dev, preprod, and prod environments using Docker distroless images on AWS.
• Designed and automated customer-facing invoice generation in CSV and PDF formats — the CSV delivering comprehensive multi-field billing reports to enterprise customers, and the PDF serving as the formal invoice document — using Java and AWS services.
• Secured cloud-native document storage on AWS S3 with KMS encryption; leveraged DynamoDB for credit management caching and SNS/SQS for async event routing across the billing pipeline.
• Built an async event-driven pipeline using Guava EventBus with AWS SNS/SQS, integrating Zuora billing data with downstream systems including SII tax document generation and PDF invoice creation; applied functional error handling with Vavr monads for resilient, composable workflows.

Parallel Porting Project — Cloud Migration · Vodafone — Global Telecom

• Engineered microservices to verify number-porting feasibility with downstream systems, streamlining validation workflows and improving processing efficiency.
• Built event-driven microservices using AWS Lambda, SQS, DynamoDB, and S3 for scalable, serverless cloud-native processing.
• Managed infrastructure as code via AWS CloudFormation; deployed containerised applications on AWS ECS for cost-optimised scalability.
• Implemented CI/CD pipelines on Azure DevOps, enabling zero-downtime deployments and fully automated release cycles.
• Conducted API load testing using Locust (Python), validating platform stability and performance under high-concurrency simulations.
• Proactively reduced security vulnerabilities through continuous monitoring using SonarQube and WhiteSource Renovate, maintaining code quality standards across releases.

Remote Deposit Capture · USAA Banking Platform — US Military Bank

• Developed fraud-prevention microservices for USAA — one of the largest US military banking institutions — enabling secure web and mobile cheque deposits with multi-layer transaction validation.
• Built and tested REST APIs using JUnit, PowerMockito, and Postman; executed functional and non-functional test cycles on QTest.
• Supported VBP Portal enhancement by designing API models for front-end teams and resolving critical role & permission management defects.
• Collaborated in an Agile team environment, participating in sprint planning, code reviews, and daily stand-ups to deliver iterative releases for a high-availability banking platform.

CyberArk Implementation · Banking Middleware Security

• Led end-to-end migration from legacy SAU (Service Account Utility) to CyberArk Privileged Account Security across banking middleware covering demand deposits, credit cards, and consumer loans.
• Secured REST and SOAP web services using OAuth 2.0 and Basic Authentication; migrated 5+ connection types including REST APIs, Kafka, JSR batches, and database connectivity.
• Coordinated with security and infrastructure teams to validate migration outcomes across critical banking services, ensuring zero disruption to live financial operations.

Newsletter Subscription Portal · USAA · Oct 2016 — Sep 2017

• Built and deployed a customer-facing newsletter subscription page on SharePoint for USAA, using HTML, CSS, and jQuery to allow banking customers to manage their communication and subscription preferences through an intuitive web interface.