Vengatesan S

• Part of the Payments Engineering and Compliance team, responsible for addressing compliance-related challenges and mandates to ensure legal adherence and protect authorization rates.
• Took ownership of project delivery end-to-end — from requirements gathering, high-level and low-level design, and implementation, to functional testing and deployment.
• Currently mentoring four junior engineers, supporting them through project tasks, knowledge transfer sessions, and professional development.
• Optimized system performance by implementing various caching mechanisms, reducing latency by up to 15ms and minimizing unnecessary external calls at the transaction level.
• Maintained nearly 99% service availability by leveraging fail-fast technologies, resiliency patterns, and redundancy support for critical services.
• Built comprehensive monitoring dashboards and visualization tools, enabling efficient feature ramp-up and faster resolution of live production issues.
• Developed tools for real-time payment data exploration, enhancing data analytics capabilities and contributing to improved transaction approval rates and business outcomes.
• Researched and completed a proof-of-concept (POC) on an event-driven architecture, and shared insights across teams to promote knowledge sharing and adoption.
  Tech: Spring Boot, Microservices, JAX-RS , Apache Kafka, AI tools, Oracle and PostgreSQL

Working for PayPal Client

• Successfully migrated tenant and unbranded traffic to the PayPal Payment Gateway, enabling faster and more secure transaction processing.
• Acquired deep domain expertise in the payments space and actively contributed to the team by driving innovative solutions and improvements.
• Gained hands-on experience with technologies such as RxNetty, Reactor Netty, multithreading, asynchronous programming, and resiliency frameworks to help deliver key business outcomes.
• Designed and built internal simulation logic to emulate third-party service responses, streamlining testing processes for around 10 services.
• Conducted a proof of concept (PoC) on performance testing and monitoring tools, and supported team members in onboarding and upskilling in these areas.
  Tech: Spring Boot, JAX-RS , Apache JMeter , Kafka, Jacoco

ERP related web application

Worked under Works Applications Co., Ltd. designed product AI WORKS , which is AI powered ERP system.

Role: Developer

HR Module, Account Module & Supply Chain Management (SCM)

Product beneficiary: SONY group, Toyota Administa, MITSUBA, Nissin group, Monex group , AIST Japan and Starbucks

• Employee Task management , Access track application and Attendance management
• General purchase management and Asset management
• Insurance and Allowances management
• Goods purchase management and Material availability management

Tech: Spring MVC, JSP, Hibernate (ORM),Oracle DB

Rest API creation

Role: Developer and business analyst for specific ERP module

• API creation for AI based ERP product (HUE)
• Server monitoring using Zabbix tool

Tech: Spring boot, Zabbix

Enterprise Mobility management (EMM):

Android Device Management (Managing/Controlling the device remotely) - for SOFTBANK

Role: Developer

• Developed Rest APIs and micro services to interact with Google API which will control the mobile application
• Explored GCP's message exchanging service and designed asynchronous system
• API documentation creation using Swagger
• Audit log and Application log monitoring using Splunk

Tech: Spring cloud, Spring Boot, Microservices,Rest API, Hibernate, React js, Swagger