Hariharan

Software Engineer with 2+ years of production experience in Java and Spring Boot backend systems. Integrated a Corporate Internet Banking (CIB) API for automated vendor payment and fund transfer workflows using hybrid RSA/AES encryption. Experienced in REST API design, microservices, SQL optimization, AWS-backed cloud workflows, and end-to-end backend delivery.

Software Engineer at Wehaul Logistics Private Limited (Drop Truck) (2024-11 – 2026-07)

Built and owned Java / Spring Boot backend services and REST APIs powering core production logistics workflows, with focus on scalability, microservices-style service design, and operational reliability.

• Integrated 6+ third-party APIs — Meta WhatsApp, Justdial, Indiamart, Intutrack, OAuthKey, and BuzzDial — with webhook consumers, retry logic, and OAuth2 token lifecycle management, reducing manual intervention in lead and notification workflows.
• Reduced SQL query latency and database CPU load by ~40% through targeted index creation, schema cleanup, and query rewrites across production MySQL and PostgreSQL instances.
• Eliminated recurring external API failures by implementing input validation, retry handling, and failure-isolation patterns across notification and live-tracking integrations.
• Owned Linux deployment pipeline — Git workflows, shell scripting, cron automation, AWS S3 storage — including production migration to DigitalOcean with full data integrity validation.

Software Development Intern at Acceleron Labs Private Limited (2023-11 – 2024-04)

• Delivered backend features, bug fixes, and release-cycle support across Java application modules in an Agile team.
• Diagnosed and resolved production issues during deployment cycles, improving service reliability across multiple releases.

Bachelor of Engineering in Computer Science – The Oxford College of Engineering (2020 – 2024)