~/suneel-kumar $ whoami

Suneel Kumar_

Senior Java Full Stack Developer

>

10+ years designing secure, scalable, enterprise-grade systems with Java, Spring Boot, AWS, and modern front ends — now building payment platforms that move millions of transactions a day, and the GenAI tooling that keeps them running.

281-786-5856 suneeluhcl@gmail.com LinkedIn
  • Location: Dallas, TX
  • Work arrangement: Remote only
  • Work authorization: H-1B — transfer required
  • Availability: Available immediately
View ExperienceContact Me
Suneel Kumar, Sr. Java Fullstack Developer — professional headshot
Java · AWS · GCP

// 01. about

About Me.

suneel@dev: ~/about — less README.md

>I'm a senior engineer with a decade of experience turning complex business problems into clean, resilient software. Today I work in Capital One's Payments Fulfillment domain, building the systems that fulfill every credit card payment — ACH, debit, check, balance transfers, and cross-border EFT — processing millions of financial transactions per day.

>My foundation is modern Java: I led my team's first production migration to Java 21 and Spring Boot 4, and I've driven Java 8 → 17 modernizations, Jakarta EE 10 upgrades, and zero-downtime monolith decompositions. But I'm deliberately polyglot — production Go, Python, and TypeScript microservices, plus big-data pipelines in Apache Spark on EMR, Databricks, Kafka, and Flink SQL feeding Snowflake and OneLake.

>Security isn't an afterthought in my work — it's the architecture. OAuth2, OIDC, JWT, mutual TLS/PKI, field-level and PGP encryption, least-privilege IAM, and PCI DSS / NIST 800-53 compliance are embedded in everything I ship. On AWS I design event-driven microservices across ECS Fargate, Lambda, Step Functions, DynamoDB, SQS, and EventBridge — deployed active/active across regions with automated failover.

>And I build with AI, not just talk about it. I've shipped a production LLM inference service that guides daily payment operations, authored reusable AI agent skills (Claude Code) that partner teams use to automate their workflows, and I hold AWS Solutions Architect – Professional and Google Cloud Professional Machine Learning Engineer certifications.

// 02. skills

Technical Arsenal.

Languages

  • Java 8/11/17/21
  • Go
  • Python
  • TypeScript
  • JavaScript (ES6+)
  • SQL
  • Scala

Backend

  • Spring Boot 2.x–4.x
  • Spring Security
  • Spring Cloud
  • Hibernate/JPA
  • Node.js
  • FastAPI
  • RESTful APIs
  • OpenAPI/Swagger
  • GraphQL
  • Microservices

Frontend

  • React
  • Angular 2–14
  • TypeScript
  • RxJS
  • HTML5
  • CSS3
  • Bootstrap
  • Responsive Design

Cloud (AWS)

  • ECS Fargate
  • Lambda
  • Step Functions
  • DynamoDB
  • S3
  • SQS
  • SNS
  • EventBridge
  • EMR
  • Glue
  • RDS
  • KMS
  • Secrets Manager
  • IAM
  • Route 53
  • CloudWatch
  • CDK
  • CloudFormation

Cloud (GCP)

  • GKE
  • Cloud Run
  • Cloud Functions
  • Pub/Sub
  • Cloud Storage
  • Cloud SQL
  • BigQuery
  • Dataflow
  • Vertex AI
  • Cloud Build
  • Artifact Registry
  • Secret Manager
  • IAM

Data & Streaming

  • Apache Spark
  • Apache Kafka
  • Apache Flink
  • Databricks
  • Snowflake
  • Microsoft OneLake
  • ETL Pipelines

Databases

  • DynamoDB
  • Oracle
  • PostgreSQL
  • MySQL
  • MongoDB
  • Cassandra
  • IBM DB2
  • SQL Server

AI / GenAI

  • LLM Integration
  • AI Agents & Agentic Workflows
  • Claude Code
  • Prompt Engineering
  • RAG
  • GenAI Inference Services
  • Vertex AI
  • MLOps

Security

  • OAuth2
  • OIDC
  • JWT
  • SAML
  • Mutual TLS / PKI
  • KMS Encryption
  • PGP
  • Vault
  • Checkmarx
  • PCI DSS
  • NIST 800-53
  • LDAP/AD

DevOps & CI/CD

  • Docker
  • Kubernetes
  • Jenkins
  • GitHub
  • Maven
  • Gradle
  • Terraform
  • SonarQube

Testing

  • JUnit 5
  • Mockito
  • Cucumber
  • Behave
  • Godog
  • WireMock
  • Playwright
  • JMeter
  • TDD/BDD

Observability

  • Splunk
  • OpenTelemetry
  • CloudWatch
  • New Relic
  • PagerDuty
  • X-Ray

// 03. experience

Where I've Worked.

0+

Years of Experience

0

Enterprise Engagements

0

Fortune 500 Clients

0+

AWS Services in Production

  1. Capital One

    Senior Java Full Stack Developer

    Nov 2023 – Present

    Richmond, VA

    • Java 17/21
    • Spring Boot 3/4
    • Go
    • Python
    • AWS
    • Spark/EMR
    • Kafka
    • GenAI
    • ▹Build mission-critical payment fulfillment microservices processing millions of credit card payments per day — ACH, debit, check, balance transfers, and cross-border EFT.
    • ▹Own the public-facing Fulfillment API (Java 17, Spring Boot 3.x on ECS Fargate) secured with OAuth2, mutual TLS, and field-level encryption.
    • ▹Led the first production migration to Java 21 / Spring Boot 4, hardened with Resilience4j circuit breakers and SQS retry/fallback queues.
    • ▹Built vendor file ingestion on AWS Step Functions (40+ vendor formats) and the EMR Spark pipeline generating TSYS posting files with automated reconciliation.
    • ▹Contribute to a next-generation real-time money movement platform in Go — event-driven, outbox-patterned, active/active across two AWS regions.
    • ▹Ship GenAI tooling: a FastAPI LLM inference service guiding end-of-day payment operations, plus reusable AI agent skills (Claude Code) adopted by partner teams.
    • ▹Engineer data pipelines with Databricks PySpark, Flink SQL, and Kafka, publishing governed datasets to Snowflake and Microsoft OneLake.
    • ▹Embed security across the SDLC — Checkmarx/SonarQube/Mend remediation, Secrets Manager and Vault, PGP file encryption, PCI DSS / NIST 800-53 controls.

    env: Java 17/21, Spring Boot 3.x/4.x, Go, Python, TypeScript, React, Apache Spark (EMR), Databricks, Flink, Kafka, AWS (ECS Fargate, Lambda, Step Functions, DynamoDB, S3, SQS, EventBridge, EMR, Glue), Snowflake, OneLake, Docker, Jenkins, Splunk, OpenTelemetry

  2. Fidelity Investments

    Full Stack Java Developer

    May 2022 – Oct 2023

    Durham, NC

    • Java 8/11
    • Spring Boot
    • React.js
    • Angular
    • AWS ECS
    • Lambda
    • DynamoDB
    • Splunk
    • ▹Led delivery of the Symphony Campaign Processing platform handling millions of user events.
    • ▹Designed stateless microservices (Java 11, Spring Boot, OAuth2, JWT + AWS IAM) with role-based access control.
    • ▹Migrated monolithic codebases to independent Spring Boot microservices, improving scalability and fault isolation.
    • ▹Built UIs in React.js and Angular; introduced threat modeling into the SDLC; reduced incident response time 30% via Splunk/CloudWatch.

    env: Java 8/11, Spring Boot, React.js, Angular, AWS ECS/Lambda/RDS/DynamoDB, Glue, CloudFormation, Splunk

  3. Capital One

    Senior Java Full Stack Developer

    Aug 2021 – Apr 2022

    Richmond, VA

    • Java 8
    • Spring Boot 2.x
    • Angular 8
    • Hibernate 5.x
    • Docker
    • Jenkins
    • ▹Built Angular 8 UI with reactive forms, custom directives, and RxJS observables.
    • ▹Implemented Spring Security with OAuth2/JWT for REST endpoint protection across microservices.
    • ▹Managed AWS infrastructure (EC2, S3, RDS, IAM, VPC, Lambda, SQS, SNS, Route 53) with CloudWatch monitoring.

    env: Java 8, Spring Boot 2.x, Angular 8, Hibernate 5.x, Docker, Jenkins, AWS

  4. CVS Health

    Java Full Stack Application Developer

    Jun 2020 – Jul 2021

    Chicago, IL

    • Java 8
    • Spring Boot
    • Angular 5/6
    • GCP
    • GKE
    • BigQuery
    • MongoDB
    • Cassandra
    • ▹Built SPAs with Angular 6, RxJS, reactive forms, and custom pipes.
    • ▹Deployed containerized Spring Boot microservices to Google Kubernetes Engine (GKE) on Google Cloud Platform, with Cloud Build CI/CD and Artifact Registry.
    • ▹Built event-driven integrations using Cloud Pub/Sub and Cloud Functions, with Cloud Storage for artifacts and Secret Manager for credentials.
    • ▹Modeled operational data across Cloud SQL and Cassandra/MongoDB, and fed analytics datasets into BigQuery for reporting.
    • ▹Migrated JMS from WebLogic to Apache ActiveMQ with Camel-based async messaging.

    env: Java 8, Spring Boot, Angular 5/6, Google Cloud Platform (GKE, Cloud Run, Pub/Sub, Cloud Functions, Cloud Storage, Cloud SQL, BigQuery, Secret Manager, IAM), MongoDB, Cassandra

  5. Essendant

    Java Full Stack Developer

    Jul 2018 – May 2020

    Denver, CO

    • Java 8
    • Spring Boot
    • Angular 2
    • Node.js
    • MongoDB
    • Oracle
    • Docker
    • AWS
    • GCP
    • GKE
    • ▹Built Angular 2 + Node.js responsive UI modules with component-based architecture and Angular routing.
    • ▹Integrated BRMS (ILOG JRules) for rule-based decision services.
    • ▹Deployed Dockerized microservices across AWS EC2 and Google Cloud Platform — GKE and Compute Engine — with Cloud Build/Container Registry and Stackdriver monitoring.
    • ▹Integrated Cloud Pub/Sub for async messaging and Cloud Storage for object storage, with Cloud SQL alongside MongoDB and Oracle.

    env: Java 8, Spring Boot, Angular 2, MongoDB, Oracle, Docker, AWS (EC2), Google Cloud Platform (GKE, Compute Engine, Cloud Storage, Cloud Pub/Sub, Cloud SQL, Cloud Build, Container Registry, Stackdriver)

  6. Teleflora

    Senior Java Developer

    Mar 2017 – Jun 2018

    Oklahoma City, OK

    • Java 7/8
    • Spring 3.0
    • Hibernate 3.5
    • JSF 2.0
    • PrimeFaces
    • WebSphere 8.1
    • ▹Designed architecture with UML/GoF patterns, Spring 3.0 (IOC/AOP), and Hibernate 3.5.
    • ▹Built SOAP/REST services (JAX-WS, JAX-RS, Apache CXF, JAXB, WSDL, XSLT).
    • ▹Integrated JSF 2.0 + PrimeFaces UI, deployed on IBM WebSphere 8.1.

    env: Java 7/8, Spring, Hibernate, Angular 2, JSF, PrimeFaces, WebSphere

  7. Credit Acceptance Corporation

    Java Developer

    Sep 2015 – Feb 2017

    Southfield, MI

    • Java
    • Spring
    • Hibernate
    • Mule ESB
    • Oracle
    • WebSphere
    • Ant/Ivy
    • ▹Built SOAP/REST service framework with XML marshalling and Mule ESB orchestration.
    • ▹Implemented EJB-based business logic and x.509 certificate-based authentication.
    • ▹Deployed on IBM WebSphere, built with Apache Ant/Ivy.

    env: Java, Spring, Hibernate, JAX-RS/JAX-WS, Mule ESB, Oracle, WebSphere

// 04. projects

Selected Work.

Capital One

Payments Fulfillment Platform

The engine that fulfills every card payment at a top-5 US bank — millions of transactions a day across ACH, debit, check, balance transfers, and cross-border EFT.

  • Own the public payment-fulfillment API and core services (Spring Boot on ECS Fargate) plus a next-generation real-time money-movement platform in Go — event-driven and active/active across two AWS regions.
  • Built the vendor-file ingestion and batch-posting pipeline on AWS Step Functions + EMR Spark (40+ file formats) with automated reconciliation to the card processor.
  • Shipped GenAI ops tooling — an LLM inference service that guides end-of-day payment decisions — and embedded PCI DSS / NIST 800-53 security (OAuth2, mutual TLS, PGP, KMS) across the SDLC.
  • Java 17/21
  • Go
  • Python
  • Spring Boot
  • AWS
  • Spark / EMR
  • Kafka
  • GenAI

Capital One

Real-Time Agent Transfer Payments

A PCI-compliant servicing channel that lets support agents move money card-to-card in real time.

  • Built a Node.js / Fastify microservice inside the Cardholder Data Environment that orchestrates tokenized card lookups, secure detokenization, and real-time transfer posting.
  • Enforced PCI DSS controls end-to-end — proof-of-possession tokens, field-level encryption, and structured security logging on every request.
  • Node.js
  • Fastify
  • GraphQL
  • REST / SOAP
  • AWS
  • PCI DSS

Fidelity Investments

Campaign Processing Platform

A high-throughput campaign-processing platform for a top asset manager, handling millions of user events.

  • Led delivery of stateless Spring Boot microservices secured with OAuth2, JWT, and AWS IAM role-based access.
  • Decomposed monoliths into independent services for scalability and fault isolation, with React and Angular front ends.
  • Introduced threat modeling into the SDLC and cut incident response time 30% with Splunk / CloudWatch observability.
  • Java 8/11
  • Spring Boot
  • React
  • Angular
  • AWS ECS / Lambda
  • DynamoDB
  • Splunk

CVS Health

Formulary Alternatives & Derivatives

Pharmacy-benefits tooling that surfaces lower-cost formulary alternatives and drug derivatives for members and providers.

  • Built Angular 6 single-page apps and containerized Spring Boot microservices deployed to Google Kubernetes Engine with Cloud Build CI/CD.
  • Wired event-driven integrations with Cloud Pub/Sub and Cloud Functions; modeled data across Cloud SQL, Cassandra, and MongoDB.
  • Fed analytics datasets into BigQuery for reporting on formulary and pricing trends.
  • Java 8
  • Spring Boot
  • Angular 6
  • GCP (GKE, Pub/Sub, BigQuery)
  • Cassandra
  • MongoDB

Essendant

ORS Nasco Website Redesign

A complete ground-up redesign of the ORS Nasco wholesale-distribution website.

  • Rebuilt the front end in Angular 2 + Node.js with a component-based architecture and responsive layouts.
  • Integrated a business rules engine (ILOG JRules) for rule-driven decisioning.
  • Deployed Dockerized microservices across AWS and Google Cloud (GKE + Compute Engine) with Pub/Sub messaging and Stackdriver monitoring.
  • Java 8
  • Spring Boot
  • Angular 2
  • Node.js
  • Docker
  • AWS
  • GCP (GKE)

Teleflora

Florist Website Platform

Designed and built a platform generating thousands of personalized websites and templates for florists nationwide.

  • Architected the system with Spring (IOC/AOP) and Hibernate using UML and GoF design patterns.
  • Delivered SOAP and REST services (JAX-WS, JAX-RS, Apache CXF) powering template personalization at scale.
  • Built the JSF 2.0 + PrimeFaces UI, deployed on IBM WebSphere.
  • Java 7/8
  • Spring 3.0
  • Hibernate
  • JSF 2.0
  • PrimeFaces
  • SOAP / REST
  • WebSphere

// 05. education

Education.

Master of Science in Computer Science

Houston, TX

Bachelor of Technology in Computer Science and Engineering

India

// 06. certifications

Certifications.

AWS Certified Solutions Architect – Professional

Amazon Web Services · 2025

Verify on Credly

Professional Machine Learning Engineer Certification

Google Cloud · 2025

Verify on Credly

// 07. contact

Get In Touch.

I'm open to senior fullstack, platform, and modernization roles. Whether you have a question, an opportunity, or just want to talk shop about Java and AWS — my inbox is always open.

281-786-5856suneeluhcl@gmail.com
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