Backend Engineer.

• Designed a multi-layered microservices architecture serving 500+ downstream users across Tokyo, London and New York with a sub-150ms SLA.
• Re-engineered a blocking REST endpoint into a streaming BulkService handling 10,000+ identifiers per request, delivering a 300%+ throughput improvement.
• Extended OAuth2 authentication from client-credentials to Authorization Code Flow, enabling ~20k+ human users to securely query calendar and trading-hours data.
• Managed 200+ production Linux hosts (160GB RAM / 16 vCPU each) supporting 1,500+ RPS, alongside end-to-end CI/CD via Docker and Jenkins across three global regions.
• Shipped 20+ zero-rollback production releases supporting 50M+ daily data distributions with zero data-loss incidents.
• Built OpenTelemetry and Loki observability with Autosys health monitoring to detect unhealthy instances before customer impact.

• Built a Documentation workflow tab guiding users through Credit and Approval stages of loan applications.
• Developed RESTful CRUD endpoints for employee and customer records with Spring MVC and stored procedures.
• Applied SOLID principles and Java design patterns (Singleton, Factory, Builder) to improve maintainability.
• Participated in Agile/Scrum ceremonies, including a stint as Scrum Master for story refinement and planning.

• Completed a software testing training program covering testing methodologies, processes and tooling.

A synchronous, one-identifier-per-request endpoint became a throughput ceiling as downstream demand grew. This walks through re-architecting it into a streaming BulkService that batches 10,000+ identifiers per request, the backpressure and memory tradeoffs that came with it, and how it delivered a 300%+ throughput improvement without breaking existing consumers. Full write-up coming soon.