Ankit Tiwari

Java Backend Software Engineer with 3 years of experience designing and building scalable microservices, distributed systems, and REST APIs for enterprise healthcare and retail clients (McKesson, Walgreens Boots Alliance). Proficient in object-oriented design, system design, event-driven architecture with Kafka, and cloud-native development on AWS. Experienced with authentication systems (SAML 2.0, SSO, Ping Identity), CI/CD pipelines, and Agile/Scrum methodologies.

AWS double-certified. 400+ DSA problems solved on LeetCode and GFG.

Software Engineer at Tata Consultancy Services (2023-10 – Present)

Enterprise Healthcare & Retail Platform — McKesson, Walgreens Boots Alliance.

Technologies: Java, Spring Boot, Microservices, MySQL, AWS, Generative AI, React, Ping Identity

• Designed and implemented a RAG-based document intelligence microservice integrating Gemini API with a vector retrieval pipeline, enabling structured output generation from unstructured requirement documents; deployed as a standalone Spring Boot service consumed via REST API.
• Architected and migrated Vendor Agreement portal authentication from LDAP to Ping Identity (SAML 2.0 + SSO), eliminating direct credential handling and protecting against brute-force and session-replay attacks — applied security best practices across distributed system boundaries.
• Built a dynamic search filter on the Organization listing API, reducing average record-lookup time from 4 minutes to under 30 seconds (8× improvement); recognized as a top workflow improvement in quarterly stakeholder review.
• Engineered a complete Forgot Password + OTP verification flow using Spring Mail and Redis (5-min expiry with fault-tolerant edge-case handling for expired tokens, duplicate requests, and brute-force limiting), demonstrating resilient backend design.
• Developed a ticketing feature with status lifecycle tracking (Open → In Progress → Resolved) and asynchronous email notifications via Kafka message queue, decoupling main-thread execution and improving system scalability.
• Resolved post-migration iframe breakage across 3 internal applications by configuring CSP frame-ancestors to whitelist trusted origins — restored cross-app access without compromising security posture.
• Designed and maintained database objects (stored procedures, views, UDFs) in MySQL and IBM DB2, eliminating redundant query logic across 2+ microservices and supporting backend data access layers for business reporting.
• Owned unit and integration test strategy (JUnit, Mockito, Testcontainers), maintaining 75%+ code coverage across 3 microservices; triaged and resolved P1 production incidents on a healthcare platform serving 1M+ users, cutting MTTR by 40% using CloudWatch and structured log analysis.
• Participated in sprint planning, requirement walkthroughs, and weekly demos with McKesson and Walgreens Boots Alliance business stakeholders; translated functional requirements into technical tasks and tracked delivery across 4+ Agile sprints

B.Tech in Information Technology – Ajay Kumar Garg Engineering College (2019-08 – 2023-06)