Rajeshkumar. Download Résumé
Senior Consultant · Chennai, India

19 years turning healthcare, banking, and big‑data complexity into shipped systems.

Full-stack development, cloud infrastructure, and healthcare IT — from core banking payment systems to a ground-up EMR & Pharmacy platform serving patients, doctors, nurses, and health advisors.

4 organizations, consulting to technical leadership
Node.js / NestJS / Java / AWS / MySQL
Healthcare · Banking · E‑commerce · Big Data
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Professional Summary

Senior Consultant with 19+ years of IT experience spanning full-stack application development, cloud infrastructure, big data analytics, and healthcare IT systems.

Proven track record of translating client business requirements into technical architecture and delivering enterprise applications end-to-end — most recently leading the ground-up design and development of a full-scale EMR and Pharmacy platform.

Combines hands-on engineering depth (Node.js/NestJS, Java, cloud, databases) with consulting-grade client engagement, requirement analysis, and solution delivery across banking, e-commerce, big data, and healthcare domains.

19+ yrsIT experience, engineer to technical lead
4Organizations — banking, payments, big data, healthcare
1EMR & Pharmacy platform architected ground-up
9+Engineering projects scheduled & prioritized as Project Lead
Key Achievements

Architecture and delivery, not just tickets closed.

Healthcare IT

EMR & Pharmacy platform, ground-up

Architected and delivered a full-scale EMR and Pharmacy platform spanning patient, doctor, nurse, and health advisor workflows — backend, database, and cloud infrastructure.

Big Data

Opioid-utilization risk scoring at scale

Built and productionized a Hadoop-based healthcare analytics pipeline over claims, pharmacy, and demographic data for a US healthcare client.

Payments

Global e-commerce payments at PayPal

Delivered multi-currency support (RUB, ZAR, JPY, CAD), Brazil/Canada regulatory compliance, and Facebook merchant integration.

Leadership

Engineer to Technical/Project Lead

Progressed across four organizations, consistently owning the full arc from client requirements to production delivery.

Core Skills

What I actually build with.

Backend Development

Node.jsNestJSJava J2EESpringSpring Boot REST API Design

Cloud & DevOps

AWS EC2DockerPortainer CI/CDBuild & Deployment Automation

Databases

MySQLOraclePL/SQL Database DesignData Modeling

Big Data & Analytics

HadoopHivePig SparkSqoopFlume HBaseZookeeperMapReduce

Consulting & Delivery

Requirements GatheringSolution Architecture Client ManagementAgile/ScrumTeam Leadership

Domains

Healthcare ITBanking & Payments E-CommerceBig Data Analytics
Professional Experience

Four companies, one throughline: requirements to production.

Senior Consultant Feb 2019 — Present
Assay Clinical Research, Chennai
  • Leading ground-up design, architecture, and development of a full-scale EMR and Pharmacy application serving patients, doctors, nurses, and health advisors.
  • Own backend development using NestJS, delivering scalable, production-grade APIs for clinical and pharmacy workflows.
  • Gather and analyze requirements directly from clients and stakeholders, converting business needs into technical specification and design documents.
  • Design the MySQL database architecture underpinning the EMR and pharmacy modules, including schema design for clinical, billing, and inventory data.
  • Manage cloud infrastructure on AWS — EC2 provisioning, scaling, and lifecycle management — and administer Portainer for containerized build and deployment pipelines.
  • Scheduled and prioritized across 9+ engineering projects in an earlier Project Lead capacity, evaluating efforts against ROI and cost-benefit metrics.
Technical Lead Aug 2014 — Feb 2019
CNSI (Client Network Services), Chennai
  • Led big data analytics initiatives for a US healthcare client, architecting solutions across the Hadoop ecosystem (HDFS, MapReduce, Hive, Pig, Spark, Sqoop, Flume, HBase, Zookeeper).
  • Designed and delivered application defect analytics and opioid-utilization risk-scoring solutions over large-scale structured and unstructured claims data.
  • Built a predictive risk-scoring pipeline connecting claims, pharmacy, and demographic data to flag utilization risk factors.
  • Installed, configured, and administered Cloudera Hadoop (CDH3/CDH4) clusters, including performance tuning and monitoring.
  • Authored Pig and Hive scripts and custom UDFs, and mentored team members on the Hadoop ecosystem.
Application Engineer / Application Delivery Jun 2010 — Aug 2014
PayPal, Chennai
  • Served as Application Delivery lead for the Digital Goods e-commerce payments platform, converting business requirements into technical designs and reference implementations.
  • Defined high-level application design and guided low-level design for AB-Testing, Brazil/Canada compliance, and multi-currency support (RUB, ZAR, JPY, CAD).
  • Built management dashboards analyzing centralized application logs to surface payment failure/success trends.
  • Delivered the Adaptive Payments suite of APIs and web flows supporting simple, parallel, and chained payment types.
  • Led code reviews, test coverage reviews, and security violation reviews across delivery cycles.
Software Engineer Jun 2007 — Jun 2010
Gruppo Banca Sella, Italy (Chennai-based)
  • Developed and delivered core banking payment systems, including Fund Transfer (Bonifici) and Remote Banking Payment Orders (PagamentiRB) applications.
  • Handled requirement gathering, technical design, development, and unit testing for Java/J2EE-based banking applications.
  • Implemented MVC-based web applications using JSP, EJB, and a custom framework; managed builds and deployments on WebLogic.
Education
MBA, International Business
Vinayaka Missions University, Salem, Tamil Nadu
B.E., Electronics and Communication Engineering
Lord Venkateshwara Engineering College, Kanchipuram, Tamil Nadu
H.S.L.C
Velammal Matriculation Higher Secondary School, Chennai
Certifications
Certified ScrumMaster (CSM)
2022
Programming HTML5 with JavaScript and CSS3 (MCSD)
2013
Oracle PL/SQL Developer (OCA)
2010
Web Component Developer (SCWCD 5)
2010
Java Programmer (SCJP 5.0)
2008