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Subhas Sing

Subhas Sing

Fullstack Sr. Software Engineer
Chandler, Arizona, US, 85249
+1-480-319-5677
subhas.sing@gmail.com
English, Bengali, Hindi

Background

About

About

Over 15 years of IT experience in Analysis, Design, Development, and Testing with various technologies in web-based applications.
Expertise in migrating large monolithic applications to event-driven microservice-based architecture using React, Spring Boot, Kafka, JMS, Avro Schema, and OAuth.
Proficient in front-end UI technologies such as React, NodeJS, jQuery, and Webpack.
Skilled in designing and developing multi-tier web applications using ReactJS, Spring Boot, Spring MVC, Spring JDBC, MongoDB, Hibernate, Java, JSP, Java Servlet, jQuery, REST Services, CSS, and SQL.
Experienced in optimizing J2EE application servers and applications for memory and performance.
Familiar with scripting languages for automation such as PowerShell, Python, and Bash.
Knowledgeable in unit testing frameworks like JUnit, Selenium, and Playwright for automated functional testing.
Extensive experience with build tools such as Maven, Gradle, Ant, Jenkins, GitHub, SVN, IntelliJ, and Eclipse.
Experienced in building applications with Kubernetes and Docker, and deploying them in Kubernetes clusters.
Configured and maintained Jenkins and AWS CI/CD pipelines for application deployment.

Work Experience

Work Experience

  • Senior Software Engineer(Contract), WellsFargo

    Jun, 2025 - Present

    Worked on major backend components for Auto Loan applications for Wells Fargo. This includes building new microservices, enhancing existing ones, and integrating with various internal systems utilizing Kafka, MongoDB, SpringBoot, OAuth, OpenShift, PCF.

    • Designed and developed scalable microservices for auto loan processing using Spring Boot and Kafka.

    • Enhanced and optimized existing backend services for improved performance and reliability.

    • Integrated with internal systems and third-party APIs to streamline loan application workflows.

    • Implemented secure authentication and authorization using OAuth.

    • Deployed and managed services on OpenShift and PCF cloud platforms.

  • Senior Software Engineer(Contract), Matson Navigation

    Feb, 2022 - May, 20253 years 3 months

    Matson Ohana Platform - Ohana platform is a web-based platform where users request quote, booking, shipping and track their containers for Maston Navigation. I, with a very small team, worked on every aspect of application development and delivered way early!

    • Served as Senior Fullstack Developer in a team of five, working directly with the client.

    • Utilized the Serverless Framework for AWS Lambda functions developed in Node.js and Java.

    • Developed backend microservice APIs using Lambda with TypeScript, Spring Boot, MongoDB, Kafka, Redis, and MySQL.

    • Leveraged Kafka for integration with internal systems and application log shipping.

    • Employed MongoDB for storing auditing details, security incidents, and message archiving.

    • Developed major reusable React v14 components used throughout the application.

    • Designed and standardized React v19 development practices for page development using React and Redux.

    • Tested and resolved defects under stringent timelines.

  • Enterprise Architect/Team Lead, Celtic Systems

    Jul, 2019 - Jan, 20222 years 7 months

    Led and architected the migration of enterprise applications to Kubernetes environments, overseeing the design, planning, and execution of cloud-native solutions. Collaborated with cross-functional teams to modernize legacy systems, implement containerization strategies, and optimize deployment pipelines for scalability, reliability, and cost efficiency. Provided technical leadership and mentorship to ensure best practices in DevOps, CI/CD, and cloud infrastructure management.

    • SpringBoot

    • MySQL

    • MsSQL

    • Azure

    • Helm

    • Kubernaties

    • Docker

    • Jenkins

    • Graphana

    • Prometheus

    • Elastic Search

    • Kibana

  • Senior Software Engineer(Contract), Matson Navigation

    Feb, 2011 - Jun, 20198 years 5 months

    Started very early stage of this project migrating mainframe to Java/J2EE base application. Worked with functional team to understand requiremnt, develop & test functionality and release.

    • Worked extensively on debugging and optimizing multithreaded applications for enhanced performance

    • Spring Framework

    • MySQL

    • JBOSS/Tomcat

    • JSP

    • Struts

    • JMS / ActiveMQ / IBM MQ

    • Implemented fixes in Hibernate code to resolve multithreading issues

    • Led the initiative to make the application stateless using Redis

    • Migrated numerous nightly batch jobs utilizing Spring Batch and Quartz

Skills

Skills

  • Frontend

    HTML / JSX

    SCSS / CSS / Styled Components

    Javascript / Typescript

    React

    i18n

    Redux

  • Backend

    Node / Express

    Java

    SpringBoot

    SpringFramework

    JMS / Kafka

    Postgres

    MongoDB

    MySQL

    Redis

    AWS Lambda

    AWS DynamoDB

    AWS S3

    AWS API Gateway

    AWS SNS

    AWS SQS

    AWS EventBridge

    Serverless Framework

  • Devops

    AWS CloudFormation

    AWS CDK

    AWS Pipeline

    Jenkin CI/CD

    GitHub / GutHub Action

    Docker

  • Infra

    Linux / Ubuntu / RedHat

    Tomcat / JBOSS / WebSphere

    Python

    Kubernaties

Education

Education

  • Computer Science and Engineering, Bachelors, Jadavpur University,Kolkata,West Bengal,India

    Jan, 1999 - Dec, 2003

Interests

Interests

  • Hiking / Running

  • Participated and successfully completed the Basic Mountaineering Course organized by Indian Mountaineering Institute, Darjeeling.

  • Ex-Secretary, Jadavpur University Mountaineering Hiking Club (JUMHC).

  • Participated in various mountaineering Expedition, Trekking & Rock-climbing team ventures..

  • Open Source