Soumen Mitra | Software Engineer (Java, Spring Boot, AWS)

About Me

Software Engineer with 4+ years of experience in building scalable, secure, and high-performance backend systems using Java and Spring Boot. Experienced in Microservices, API Gateways, AWS, Security, and Cloud-native deployments.

Java Spring Boot Microservices Spring Security OAuth 2.0 / JWT AWS Kubernetes Kafka / Kinesis PostgreSQL Git · Maven · Gradle

Experience

Infosys – Senior Associate Consultant

Jan 2025 – Present

Developed and maintained Microservices-based API Gateway using Spring Boot & Spring Security.
Implemented JWT and OAuth 1.0 / 2.0 authentication for secure service-to-service communication.
Migrated 10+ legacy Oauth1 services to modern Oauth2 architecture
Followed TDD practices and prepared Functional Requirement Documents (FRD).
Have familiarity with AI based tools for development and increased productivity using prompting techniques

Cognizant – Software Engineer

Aug 2021 – Nov 2024

Automated a manual data-processing workflow, reducing execution time from 3 weeks to minutes.
Reduced production bugs by 25% through Spring Boot upgrades and OCP migrations.
Handled PostgreSQL DB migration and implemented new business features in Java.

Projects

Smart Traffic System

Built congestion detection using Python & Java with ML techniques.
Used Hidden Markov Model (HMM) and Damerau-Levenshtein distance algorithm.
Predicted traffic congestion using spatio-temporal vehicle data.

@Karm

A Java-based productivity application to create and manage work items and project structures — designed to help track projects and progress.

Project & work-item management
Dual mode of action - Server mode and CLI mode
Background file saves, sorting, and search features (in progress / PRs)
Release: v_1.1.0 · License: Apache-2.0