Senior Executive at IDBI Intech · Thane, India

Onkar K. Pawar Java Backend Developer

Building secure & scalable microservices with strong foundations in performance and security.

Results-oriented Software Engineer with 4+ years of experience designing and building secure, scalable microservices using Java and Spring Boot. Skilled in Spring Cloud, React.js, and cloud-native deployment, with a focus on secure system design.

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GitHub LinkedIn onkarpawar58@gmail.com
Portrait of Onkar K. Pawar
Experience
4+ years
Performance gain
70%
Microservices shipped
7+

About

Professional summary

Java Backend Developer with 4+ years designing, developing, and maintaining scalable backend applications and microservices using Java and Spring Boot. Proven track record improving application performance by 70% through microservices architecture and Spring Cloud Gateway, and strengthening enterprise security via AES encryption, LDAP, and JWT-based authentication and authorization. Experienced with Docker, CI/CD pipelines, and cross-functional Agile delivery across secure, high-availability systems.

Current role
Senior Executive, IDBI Intech
Education
Bachelor of Computer Science, 2016 – 2020
Based in
Thane, Maharashtra 400607, India
Specialisation
Secure, scalable microservices

Impact

Measured results

Every figure below is taken directly from delivered work described in my resume.

  • 0%

    Application performance improvement

    Through Spring Boot microservices architecture at IDBI Intech.

  • 0%

    Enterprise security compliance increase

    Via LDAP and multi-level JWT-based authentication and authorization.

  • 0%

    Code efficiency improvement

    From leading the migration of legacy systems to Spring Boot.

  • 0+

    Microservices architected & deployed

    Delivered with Docker and CI/CD pipelines across a 15+ member team.

  • 0%

    Reduction in repetitive coding effort

    By building reusable encryption utility modules for secure API communication.

  • 0%

    Reduction in system downtime

    Through backend performance enhancements and product updates.

Career

Professional experience

Four roles across enterprise product engineering, secure backend development and IT infrastructure.

  1. Senior Executive

    IDBI Intech

    Current

    Designing and developing secure, scalable backend services on Java and Spring Boot microservices for client projects.

    • 70%Performance gain
    • 40%Security compliance
    • 7+Microservices
    Responsibilities & achievements
    • Designed and developed secure, scalable backend services using Java and Spring Boot microservices, improving application performance by 70% through microservices architecture.
    • Led the migration of legacy systems to Spring Boot, improving code efficiency by 30% and reducing maintenance overhead.
    • Designed and implemented end-to-end AES encryption (PKCS7 padding) to secure data exchange across Gateway Server, Eureka Server, and multiple microservices.
    • Developed and integrated LDAP authentication and multi-level JWT-based authentication and authorization, improving enterprise security compliance by 40%.
    • Architected and deployed 7+ microservices using Docker and CI/CD pipelines, collaborating with a cross-functional team of 15+ engineers, QA, and project managers to deliver secure, scalable solutions on schedule.
    • Spring Boot
    • Spring Cloud Gateway
    • React.js
    • AES Encryption
    • JWT
    • LDAP
    • Eureka
    • Docker
    • CI/CD
    • SQL / Oracle

  2. Software Engineer

    Nexstep Infotech Pvt Ltd (Expenzing)

    Delivered backend upgrades, reusable encryption modules and VAPT remediation across the Expenzing product suite.

    • 20%Less repeated code
    • 15%Downtime reduction
    • 5+Project upgrades
    Responsibilities & achievements
    • Collaborated with cross-functional frontend, QA, and DevOps teams to deliver 5+ backend project upgrades and client-specific enhancements within tight deadlines.
    • Built reusable encryption utility modules for secure API communication, reducing repetitive coding effort by 20% and improving system consistency.
    • Delivered backend performance enhancements and product updates, reducing system downtime by 15% and optimizing server response times.
    • Strengthened application security by resolving VAPT findings, including SSL pinning, encrypted body transmission, and token validation mechanisms for secure API communication.
    • Maintained code quality through detailed test plans, code reviews, and technical documentation across projects.
    • Java
    • React Native
    • Node.js
    • JBoss
    • WildFly
    • MySQL
    • Oracle
    • SSL Pinning
    • Token Validation

  3. IT Technical Engineer

    Tritorc

    Maintained desktop and network infrastructure across Windows Server and Linux environments.

    • 30+Systems supported
    Responsibilities & achievements
    • Managed and optimized the maintenance, upgrade, and troubleshooting process for 30+ desktop systems, ensuring minimal downtime and reliable system performance.
    • Configured and maintained network infrastructure across Windows Server and Linux environments using Active Directory, DNS, DHCP, TCP/IP, and VPN, ensuring reliable connectivity for 30+ systems.
    • Utilized Jira, TeamViewer, and RDP for remote support and efficient issue tracking.
    • Windows Server
    • Linux
    • Active Directory
    • DNS
    • DHCP
    • TCP/IP
    • VPN
    • Jira

  4. Application Developer (Internship)

    CMP Infotech

    Built and maintained client websites using ASP.NET and C# alongside the QA team.

    • 10+Websites delivered
    • 50+Bugs resolved
    Responsibilities & achievements
    • Developed 10+ user-friendly websites using ASP.NET and C#, delivering functional front-end and back-end solutions for diverse client requirements.
    • Fixed 50+ bugs across multiple web applications, enhancing overall functionality and ensuring reliable site performance.
    • Collaborated with the QA team to enhance website performance and visual themes across 10+ projects, ensuring optimal user satisfaction.
    • ASP.NET
    • C#

Work

Selected projects

Enterprise projects are described at a professional level only — no client data, credentials, endpoints or proprietary code is published.

IDBI Intech — built from scratch

Secure Microservices Platform

A secure, scalable microservices architecture with LDAP authentication and end-to-end encrypted communication between every service in the platform.

RoleSenior Executive — designed and built the platform from scratch

What I built

  • Built a React.js frontend with LDAP login and AES encryption for secure client-to-server communication.
  • Implemented a Gateway Server for centralized authentication and call filtering across the platform.
  • Secured inter-service communication with multi-level JWT-based and database-driven token authentication.
  • Applied end-to-end AES encryption with PKCS7 padding for data exchange between the Gateway Server, Eureka Server and the microservices.
  • Leveraged Eureka for service discovery and load balancing to ensure reliability and performance.

Security

  • LDAP authentication
  • AES encryption (PKCS7 padding)
  • Multi-level JWT authentication
  • Database-driven token authentication
  • Gateway call filtering
Platform
React.js · Spring Boot · Java 17 · Hibernate
Database
MySQL · Oracle
App server
Tomcat

Impact

  • 70% improvement in application performance through microservices architecture.
  • 40% increase in enterprise security compliance through LDAP and multi-level JWT authentication.
  • 7+ microservices architected and deployed with Docker and CI/CD pipelines.
  • React.js
  • Crypto (AES)
  • Spring Boot
  • Spring Cloud Gateway
  • Eureka
  • JWT
  • Hibernate
  • SQL

Nexstep Infotech Pvt Ltd (Expenzing)

Expenzing P2P & TEM Mobile Applications

Procure-to-Pay and Travel & Expense Management mobile applications, extended with new functionality and hardened against VAPT findings.

RoleSoftware Engineer — feature development, security remediation and performance work

What I built

  • Implemented multi-attachment functionality across the mobile applications.
  • Implemented OCR on invoices and expense vouchers.
  • Added map functionality using Google services.
  • Delivered UI/UX upgrades across the applications.

Security

  • SSL pinning
  • JSession usage
  • Encrypted body passing
  • Single response service
  • Multiple login prevention
  • Broken authentication prevention
  • Rooted device blocking
Platform
Java · React / CLI · React Native · Node.js
Database
MySQL · Oracle
App server
JBoss 7.0.1 · WildFly 23 · WildFly 26

Impact

  • 5+ project upgrades and client-specific enhancements delivered with cross-functional teams.
  • 20% reduction in repetitive coding effort through reusable encryption utility modules.
  • 15% reduction in system downtime through performance enhancements and product updates.
  • Java
  • React Native
  • Node.js
  • JBoss
  • WildFly
  • MySQL
  • Oracle
  • OCR
  • Google Maps services

Engineering

Architecture

This diagram reflects the architecture as described in the resume source document. Only components stated there are shown.

DocumentedDocumented project architecture — Secure Microservices Platform, IDBI Intech

Secure microservices architecture A React.js client sends AES-encrypted requests to a Spring Cloud Gateway Server, which authenticates against LDAP and filters calls. The gateway resolves services through a Eureka Server and routes to Spring Boot microservices, which exchange AES-encrypted data secured by multi-level JWT and database-driven tokens, and read and write to a MySQL or Oracle database through Hibernate. CLIENT EDGE PLATFORM DATA React.js frontend LDAP login · AES-encrypted payloads Spring Cloud Gateway Server Centralised auth · call filtering LDAP directory Enterprise authentication Eureka Server Discovery · load balancing Microservice Spring Boot · Java 17 Microservice Spring Boot · Java 17 Microservice 7+ services deployed MySQL / Oracle Hibernate · token store AES / HTTPS JWT + DB token Hibernate
Secure microservices platform — request path from the React.js client through the gateway to the Spring Boot services and database.

Client

  • React.js frontendLDAP login screen, AES-encrypted request/response payloads

Edge

  • Spring Cloud Gateway ServerCentralised authentication and call filtering for every inbound request

Platform

  • Eureka ServerService discovery and load balancing
  • Spring Boot microservices7+ services, each exchanging AES-encrypted data

Security

  • LDAP authenticationEnterprise directory login at the edge
  • Multi-level JWT & database-driven tokensSecures inter-service communication
  • AES encryption (PKCS7)End-to-end encrypted data exchange

Data

  • MySQL / OracleAccessed through Hibernate; hosts the token store

Runtime & delivery

  • Java 17
  • Spring Boot
  • Hibernate
  • Tomcat
  • Docker
  • CI/CD pipelines

Toolkit

Technical skills

Grouped as they appear in my resume — no invented proficiency scores.

Languages & Core

  • Java
  • Core Java
  • JEE
  • SQL
  • Design Patterns
  • SOLID Principles

Frameworks

  • Spring Boot
  • Spring Cloud Gateway
  • Hibernate
  • Microservices Architecture
  • REST APIs
  • Struts
  • React.js

Security

  • AES Encryption
  • JWT
  • LDAP Authentication
  • Authentication & Authorization
  • SSL Pinning
  • Token Validation

Service Discovery & Communication

  • Eureka (Service Discovery & Load Balancing)
  • Gateway Server
  • Event-driven service communication

Databases

  • MySQL
  • Oracle
  • SQL

DevOps & Version Control

  • Docker
  • Jenkins
  • CI/CD Pipelines
  • GitHub
  • SVN
  • Git Version Control

Application Servers

  • JBoss
  • WildFly
  • Tomcat

Development Practices

  • Code Reviews
  • Test Planning
  • Secure Coding Practices
  • Performance Optimization
  • Agile / Scrum
  • Mobile performance optimization

Credentials

Education, certifications & awards

Education

  • Bachelor of Computer Science

    Bharati Vidyapeeth College of Engineering

    6.89 CGPA

Certifications

  • Master Microservices with Spring Boot, Docker, Kubernetes

    Udemy

  • Complete React Developer in 2023 (Redux, Hooks, GraphQL)

    Udemy

  • Java Design Patterns & SOLID Design Principles

    Udemy

  • Multiplatform Mobile App Development With React Native

    Coursera

Awards

  • Going Beyond Call of Duty

    Issued by the CEO, Expenzing

Contact

Open to backend & microservices roles

The quickest way to reach me is email or LinkedIn. My full resume is available below.

Email me Download resume