Vasanth Dhage

Developed and maintained a high-throughput backend payment platform, processing over 1M daily transactions across multi-bank APIs, ensuring regulatory compliance and real-time authorization for POS and online payments.

Led a critical migration from Java Zulu to Amazon Corretto and Ubuntu to Amazon Linux 3 (EC2), significantly enhancing environment compatibility and reducing annual infrastructure costs.

Achieved key milestones by integrating modern payment acceptance devices like Dynaflex2Go and securing WorldPay certification, successfully onboarding 20,000 new merchants.

Spearheaded critical components of a database migration from MSSQL Server to AWS Aurora (PostgreSQL), refactoring over 200 queries and stored procedures, improving query efficiency by 30%, and reducing API latency and compute costs.

Modernized the application build system from Ant to Maven, streamlining development workflows and enhancing code base modularity, resulting in a 10% reduction in CPU utilization.

Collaborated cross-functionally with QA and DevOps teams to ensure robust release reliability and production readiness for critical payment systems.

Developed a scalable airline order system as microservices utilizing Java 17, Spring Boot, gRPC, and GCP (GKE, Spanner, Pub/Sub), enabling seamless flight reservations and status tracking for customers.

Boosted service reliability and performance by implementing comprehensive unit and integration tests, increasing test coverage from 65% to 95%.

Mentored new engineers, conducted rigorous code peer reviews, and led cross-functional project meetings to ensure alignment of engineering and product objectives.

Partnered with QA and DevOps teams to ensure high release reliability and production readiness for critical airline systems.

Engineered an airline credit system as a microservice for regional carriers, directly contributing to $15M in additional annual revenue.

Developed an Email Notification Service as a Node.js microservice, consuming Google Pub/Sub events to parse JSON payloads and trigger real-time flight ticket notifications for customers.

Automated cloud provisioning using Terraform IaC and YAML scripts, significantly enhancing deployment efficiency on Google Kubernetes Engine.

Developed and maintained emCA, a full-stack lifecycle management application for X.509 digital certificates using Spring MVC and MySQL, enabling enterprise customers to create and publish digital certificates for organizational workflows.

Engineered emTSA, an RFC3161-compliant document timestamping service, leveraging Java 8, Bouncy Castle, and NTP for precise time verification.

Collaborated with QA and DevOps teams to ensure robust release reliability and automation readiness for full-stack applications.

Enabled secure signing of confidential and legal PDFs for clients, leveraging Java 8, Bouncy Castle libraries, and advanced cryptography.

Developed robust REST APIs using Spring Boot and Swagger for secure document signing workflows, incorporating Java 8, cryptography, and HSM modules (Thales, JISA, AWS HSM).