Muthukumar Kusalavan - Senior Java Backend Developer

Q: What languages does Muthukumar speak?

Muthukumar speaks the following languages: English (Native) .

Q: How many years of experience does Muthukumar have?

Muthukumar has at least 10 years of experience. During this time, Muthukumar has worked in at least 6 different roles and for 8 different companies . The average length of individual experience is 1 year and 3 months . Note that Muthukumar may not have shared all experience and actually has more experience.

Q: What is Muthukumar's latest experience?

Muthukumar's most recent position is Senior Java Backend Developer at Upwork .

Q: What companies has Muthukumar worked for in recent years?

In recent years, Muthukumar has worked for Upwork , Accenture , Engineering Group , and IASON .

Q: Which industries is Muthukumar most experienced in?

Muthukumar is most experienced in industries like Information Technology , Insurance , and Tourism . Muthukumar also has some experience in Education and Banking and Finance .

Q: Which business areas is Muthukumar most experienced in?

Muthukumar is most experienced in business areas like Information Technology , Product Development , and Quality Assurance .

Q: Which industries has Muthukumar worked in recently?

Muthukumar has recently worked in industries like Information Technology , Insurance , and Banking and Finance .

Q: Which business areas has Muthukumar worked in recently?

Muthukumar has recently worked in business areas like Information Technology and Product Development .

Q: What is Muthukumar's education?

Muthukumar holds a Doctorate in Digital Communications from VIT University , a Master in Information Technology from Anna University and a Bachelor in Information Technology from Anna University .

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Experience

Jan 2025 - Oct 2025

10 months

Senior Java Backend Developer

Upwork

Developed Java 21 / Spring Boot 3.2 microservices with REST and GraphQL APIs for GDPR-compliant consent workflows using Hexagonal Architecture
Enhanced Backend-for-Frontend (BFF) performance using AI-assisted tools for code refactoring and optimization
Built event-driven workflows with Kafka, RabbitMQ, AWS SQS, and integrated Salesforce Marketing Cloud for real-time consent tracking
Implemented OAuth2 and Keycloak security, automated CI/CD with Jenkins, GitHub Actions, and Gradle, and deployed containerized services on Docker and Kubernetes with AWS and Azure
Executed unit, integration, and contract testing with JUnit 5, TestNG, Mockito, and TestContainers; monitored performance via Grafana, Kibana, and AWS CloudWatch
Developed microservices for digital identity verification and e-signature management with Hexagonal Architecture
Integrated Keycloak 24.x with OAuth2.1 and OpenID Connect for SSO and RBAC, ensuring EU eIDAS compliance
Designed API-first microservices with OpenAPI 3.1, Swagger, and GraphQL for improved interoperability
Automated CI/CD pipelines with Jenkins, GitHub Actions, and Gradle; deployed containerized services on AWS EKS and Azure; monitored with Grafana, Kibana, CloudWatch, and TestContainers

Sep 2023 - Dec 2024

1 year 4 months

Senior Java Developer

Accenture

Developed Java 21 / Spring Boot 3.1 microservices for quoting, claims, and policy renewals using Hexagonal Architecture and DDD
Implemented asynchronous event-driven workflows with Apache Kafka 3.6, RabbitMQ, and ActiveMQ
Integrated GraphQL APIs with REST endpoints and applied AI-assisted tools for refactoring and optimization
Utilized gRPC v1.56 for high-performance inter-service communication, reducing latency by 20%
Managed data persistence with MongoDB, Couchbase, Redis, and PostgreSQL
Secured backend APIs using OAuth2.1, Keycloak 24.x, and JWT for SSO and RBAC
Automated CI/CD with Jenkins, GitHub Actions, and Gradle; containerized deployments on Docker and Kubernetes (AWS EKS/ECS, Azure)
Integrated Salesforce middleware and Shopify APIs to synchronize policy and quote data
Configured Grafana, Kibana, and AWS CloudWatch dashboards; used TestContainers for integration testing

May 2023 - Sep 2023

5 months

Senior Java Developer

Engineering Group

Developed Java 17 / Spring Boot 2.6 microservices for account and payment processing using Hexagonal Architecture
Integrated REST and GraphQL APIs and applied AI-assisted tools for code refactoring and performance optimization
Implemented asynchronous workflows with Kafka 2.8 and ActiveMQ 5.16 for real-time transaction updates
Managed Oracle 19c and PostgreSQL 13 databases with Spring Data JPA and Flyway
Automated CI/CD pipelines with Jenkins and GitHub Actions; containerized microservices with Docker and deployed on AWS EKS/Kubernetes
Secured APIs with Keycloak, OAuth2.1, and JWT for federated SSO and RBAC
Configured Grafana, Kibana, Prometheus, and AWS CloudWatch for monitoring and anomaly detection; used TestContainers for integration testing
Applied JVM optimization techniques and multithreading strategies to enhance performance
Integrated Salesforce APIs for customer data synchronization
Ensured observability, resilience, and scalability of distributed systems

Jul 2021 - Feb 2023

1 year 8 months

Senior Java Developer

IASON

Developed Java 12 / Spring Boot 2.2 microservices for employee and inventory management, integrating REST APIs and applying AI-assisted code optimization tools
Implemented asynchronous workflows with Apache Camel 3.x, Kafka 3.6, RabbitMQ 3.9, and ActiveMQ 5.x
Secured services with Spring Security, OAuth2.0, Keycloak, and JWT for role-based access control and compliance
Automated CI/CD pipelines with Jenkins, GitHub Actions, and Gradle; containerized deployments on Docker (AWS EKS/ECS, Azure)
Enhanced observability and performance with Grafana, Kibana, AWS CloudWatch, and TestContainers

Jan 2020 - Jul 2021

1 year 7 months

Java Developer

Reply Srl

Developed modular microservices for employee and inventory management using Java 12 and Spring Boot 2.2
Secured APIs and services with Spring Security, OAuth2.0, HTTPS, and RBAC
Implemented asynchronous, event-driven processing with Apache Camel 3.x, Kafka 3.6, RabbitMQ 3.9, and ActiveMQ 5.x
Containerized microservices with Docker and deployed on AWS EKS/ECS; leveraged AWS Secrets Manager for secure credential management
Automated CI/CD pipelines with Jenkins and Maven; integrated JUnit 5 and Mockito for testing
Maintained observability with AWS CloudWatch, Grafana, and Kibana
Developed backend billing and accounting microservices using Java 11, Spring Boot 2.0, and Spring MVC with REST and GraphQL APIs
Implemented OAuth2.0, Keycloak, and JWT for secure authentication
Designed multi-threaded and event-driven workflows with Kafka 3.5 and ActiveMQ 5.x
Automated build and deployment with Jenkins, Maven, and GitHub Actions; containerized services on Docker and Kubernetes
Enhanced performance with Redis caching and hybrid data storage using MongoDB and Couchbase
Converted an iText-based PDF signing web application to ASP.NET, handling API calls, key exchange, hashing, and PDF processing with RUPS, pdfSweep, and pdfHTML
Refactored legacy code and implemented PBE with MD5 and DES algorithms for encryption and decryption

Mar 2017 - Oct 2019

2 years 8 months

Java Automation Tester

Inetz Tech Solutions

Selected test cases for automation and performed functional testing of the front-end using Selenium IDE and WebDriver
Created a data-driven framework using TestNG
Conducted parallel browser testing using Selenium Grid
Developed the persistence layer using Hibernate ORM with HQL and Criteria API

May 2014 - Jun 2015

1 year 2 months

Web Developer

Infiniti Software Solutions Pvt. Ltd

Developed a travel automation platform to provide backend support to travel agencies
Integrated multiple GDS/APIs and accounting systems into the online booking tool to automate processes
Implemented the MVC framework and front-end development using HTML, CSS, Bootstrap, JavaScript, and jQuery
Integrated databases with MySQL, PostgreSQL, and MongoDB

Dec 2011 - Sep 2012

10 months

Software Application Developer

Apollo Computer Education

Developed a MATLAB-based educational project
Integrated system projects utilizing microcontrollers, Raspberry Pi, and Embedded C

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Insurance, Tourism, Education, and Banking and Finance.

Information Technology

Insurance

Tourism

Education

Banking and Finance

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, and Quality Assurance.

Information Technology

Product Development

Quality Assurance

Summary

Senior Java Backend Developer with 8+ years of experience in designing and developing scalable microservices using Java 8-21 and Spring Boot. Skilled in Hexagonal Architecture, DDD, REST/GraphQL APIs, and event-driven systems with Kafka, RabbitMQ, and Apache Camel. Experienced in secure authentication (OAuth2.1, OpenID Connect, Keycloak), CI/CD automation (Jenkins, GitHub Actions, Maven, Gradle), and containerized deployments on Docker, Kubernetes, AWS, and Azure. Proficient in cloud integrations, AI-assisted code optimization, and middleware (Salesforce, Shopify), ensuring high performance, reliability, and observability across distributed systems.

Skills

Backend & Frameworks: Java 8-21, Spring Boot 2.X-3.X, Spring Mvc, Spring Data Jpa, Spring Security, Spring Cloud, Rest/Graphql Apis, Openapi/Swagger, Microservices, Hexagonal Architecture, Ddd, Grpc, Soap
Messaging & Event Systems: Apache Kafka, Rabbitmq, Activemq, Apache Camel, Event-Driven & Asynchronous Processing
Databases & Storage: Postgresql, Mysql, Oracle, Mongodb, Couchbase, Redis, Hibernate Orm, Flyway, Liquibase
Cloud & Devops: Aws (Eks/Ecs, Lambda, S3, Rds, Cloudwatch, Secrets Manager), Azure, Gcp, Docker, Kubernetes, Terraform, Helm, Ci/Cd (Jenkins, Github Actions), Sonarqube
Integration & Middleware: Salesforce Api, Shopify Api, Api Gateway, Webhooks, Custom Integrations
Testing & Qa: Junit 5, Mockito, Testng, Postman, Wiremock, Testcontainers, Contract & Performance Testing
Monitoring & Observability: Grafana, Kibana, Prometheus, Elk Stack, Aws Cloudwatch, Zipkin, Jaeger
Security & Authentication: Oauth2.1, Openid Connect, Keycloak, Jwt, Sso, Rbac, Https/Tls, Csrf Protection
Concurrency & Performance: Java Concurrency Api, Multithreading, Executor Framework, Reactive Streams, Jvm Performance Tuning

Languages

English

Native

Education

Jul 2015 - Sep 2016

VIT University

PhD by Research in Digital Communications · Digital Communications · Vellore, India

Aug 2012 - Apr 2014

Anna University

Master's Degree - Information Technology, IoT, Big Data Analytics and Cloud Computing · Information Technology · Chennai, India

Aug 2007 - Apr 2011

Anna University

Bachelor's Degree - Information Technology, Python Programming, Cloud Computing, IoT and C Programming · Information Technology · Chennai, India

Certifications & licenses

Driving Licence: B

Statistics

Experience

Total positions 8

Experience in Information Technology 8 y

Avg length 1 y 3 m

Longest experience 2 y 7 m

Expertise

Recent roles Senior Java Backend Developer, Senior Java Developer, Java Developer

Main industries Information Technology, Insurance, Tourism

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Doctorate

Certifications earned 1

Profile

Created

November 2025

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Frequently asked questions

Have questions? Find more information here.

Muthukumar speaks the following languages: English (Native).

Muthukumar has at least 10 years of experience. During this time, Muthukumar has worked in at least 6 different roles and for 8 different companies. The average length of individual experience is 1 year and 3 months. Note that Muthukumar may not have shared all experience and actually has more experience.

Based on recent experience, Muthukumar would be well-suited for roles such as: Senior Java Backend Developer, Senior Java Developer, Java Developer.

Muthukumar's most recent position is Senior Java Backend Developer at Upwork.

In recent years, Muthukumar has worked for Upwork, Accenture, Engineering Group, and IASON.

Muthukumar is most experienced in industries like Information Technology, Insurance, and Tourism. Muthukumar also has some experience in Education and Banking and Finance.

Muthukumar is most experienced in business areas like Information Technology, Product Development, and Quality Assurance.

Muthukumar has recently worked in industries like Information Technology, Insurance, and Banking and Finance.

Muthukumar has recently worked in business areas like Information Technology and Product Development.

Muthukumar holds a Doctorate in Digital Communications from VIT University, a Master in Information Technology from Anna University and a Bachelor in Information Technology from Anna University.

Muthukumar has 1 certificate: Driving Licence: B.

Muthukumar is immediately available full-time for suitable projects.

Muthukumar's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

To hire Muthukumar, click the Meet button on the profile to request a meeting and discuss your project needs.

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Industry Experience

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Summary

Skills

Languages

Education

VIT University

PhD by Research in Digital Communications · Digital Communications · Vellore, India

Anna University

Master's Degree - Information Technology, IoT, Big Data Analytics and Cloud Computing · Information Technology · Chennai, India

Anna University

Bachelor's Degree - Information Technology, Python Programming, Cloud Computing, IoT and C Programming · Information Technology · Chennai, India

Certifications & licenses

Driving Licence: B

Statistics

Experience

Expertise

Qualifications

Profile

Frequently asked questions

What languages does Muthukumar speak?

How many years of experience does Muthukumar have?

What roles would Muthukumar be best suited for?

What is Muthukumar's latest experience?

What companies has Muthukumar worked for in recent years?

Which industries is Muthukumar most experienced in?

Which business areas is Muthukumar most experienced in?

Which industries has Muthukumar worked in recently?

Which business areas has Muthukumar worked in recently?

What is Muthukumar's education?

Does Muthukumar have any certificates?

What is the availability of Muthukumar?

What is the rate of Muthukumar?

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