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Leelashree Patra

@leelashreepatra

Staff Software Engineer at Visa who cut authorization platform failures from 2% to 0.01%.

At Visa, I served as Staff Software Engineer and technology custodian for an authorization reliability platform handling more than 3M API calls per month. I reduced its 5xx failure rate from 2% to 0.01% while sustaining 99.99% uptime.

I modernized backend architecture through an enterprise Java 25 upgrade across more than 10 microservices. I also led the migration of 80K+ loyalty datasets into a centralized hub integrated with a 16-microservice architecture.

At Visa, I designed an AI-powered code review agent that reviewed pull requests across 20 repositories, and shipped an internal Interview Evaluation Assistant built on ChatGPT APIs. I also grew the Buyer Travel Solutions backend team from one to five engineers and managed their onboarding and career development.

Earlier, at Philips, I worked on hospital configuration, patient identity, and interoperability systems, including unifying more than 50,000 patient records. At Infosys, I developed backend and fulfilment systems for Nordstrom and contributed to AWS migration workstreams.

Experience

Work history, roles, and key accomplishments

Staff Software Engineer

Visa

Apr 2022 - Aug 2026 (4 years 4 months)

Served as Application Technology Custodian and people manager for Visa's authorization reliability platform, reducing 5xx failure rates from 2% to 0.01% and growing the team from 1 to 5 engineers. Led Java 25 upgrade across 10+ microservices and a large-scale data migration using GenAI tooling.

Java Spring Boot Microservices AWS Kubernetes GenAI Claude Code ChatGPT API Reliability Engineering People Management Technical Leadership

Senior Software Engineer

Visa

Sep 2019 - Mar 2022 (2 years 6 months)

Drove Diffblue integration to improve developer efficiency by 20%, designed an automated intake system, and built a centralized authentication service with RBAC. Engineered proactive issue-detection using Splunk and implemented CI/CD quality gates.

Java Spring Boot Splunk Jira Rally RBAC CI CD Testing Automation Diffblue Observability

Software Technologist

Philips

Sep 2016 - Sep 2019 (3 years)

Led development of the CareHub Configuration System, reducing new-site onboarding time by ~40%, and delivered a Patient Identity Management system unifying 50,000+ patient records. Implemented FHIR-compliant REST services and GDPR consent workflows.

Java Spring Boot FHIR REST APIs GDPR Healthcare Data Integration Configuration Management

Senior Software Engineer

Infosys

Apr 2013 - Sep 2016 (3 years 5 months)

Owned backend development for Nordstrom's order management, inventory, and merchandise search systems, and developed omni-channel fulfilment solutions including BOPUS. Led AWS cloud migration workstreams with event-driven patterns.

Java AWS S3 Amazon SQS SNS Ecommerce Order Management Inventory Cloud Migration

Education

Degrees, certifications, and relevant coursework

Silicon Institute of Technology, Bhubaneswar (Biju Patnaik University of Technology)

Bachelor of Technology, Computer Science and Engineering

2008 - 2012

Bachelor of Technology in Computer Science and Engineering from Silicon Institute of Technology, Bhubaneswar, affiliated with Biju Patnaik University of Technology, completed in 2012.