You will get Java Modernization for Legacy Applications with Spring Boot
Top Rated
Top Rated
Project details
You will get a modernized, production-ready Java application with a cleaner, more scalable architecture and Spring Boot modernization where needed. With 8+ years of experience in Java/Spring development, I specialize in modernizing legacy Java applications while keeping business logic, functionality, and production stability in focus.
I can help modernize outdated Java applications, upgrade legacy frameworks, improve application performance, refactor backend code, and move suitable legacy components toward modern Spring Boot and microservice architectures.
I have built enterprise applications from the ground up, worked on web applications serving 100K+ daily active users, and improved application response times from 4 seconds to 700 ms through backend optimization and performance tuning.
Whether you need a Java modernization project, legacy application modernization, Spring Boot modernization, or a gradual migration from legacy architecture to microservices, I will focus on a safe, maintainable, and scalable implementation without unnecessary changes to your existing system.
I can help modernize outdated Java applications, upgrade legacy frameworks, improve application performance, refactor backend code, and move suitable legacy components toward modern Spring Boot and microservice architectures.
I have built enterprise applications from the ground up, worked on web applications serving 100K+ daily active users, and improved application response times from 4 seconds to 700 ms through backend optimization and performance tuning.
Whether you need a Java modernization project, legacy application modernization, Spring Boot modernization, or a gradual migration from legacy architecture to microservices, I will focus on a safe, maintainable, and scalable implementation without unnecessary changes to your existing system.
Programming Languages
JavaScript, Java, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $249
These options are included with the project scope.
$249
- Delivery Time 5 days
- Number of Revisions 2
- Design Customization
- Content Upload
- Responsive Design
- Source Code
Frequently asked questions
14 reviews
(13)
(1)
(0)
(0)
(0)
This project doesn't have any reviews.
PS
Philippe S.
Jan 30, 2025
Integration testing
Niravdas is very skilled and highly reliable. I shall work with him again when the next opportunity arises.
RA
Reza A.
Oct 26, 2024
Java Backend- and Webdeveloper with Spring and Javascript Expertise
ST
Sachin T.
Oct 26, 2024
Kotlin Web Development (Spring BFF)
Yes, performed well, and had other team members to support him (though I found that out later)
This area was relatively new to him, but he had already hand-on experience with Java, and Spring (Boot, Session, and Security).
Overall, I would recommend him, if you have a short, medium or long term project
This area was relatively new to him, but he had already hand-on experience with Java, and Spring (Boot, Session, and Security).
Overall, I would recommend him, if you have a short, medium or long term project
ST
Shekar T.
Jun 26, 2024
Need to upgrade an API using spring frame to create consumer groups on Kafka
Niravdas has a very good knowledge on the springframe work. He understood the requirements very quickly and was able to deliver on time. He also quickly reacts and take complete ownership of the issues. Would highly recommend him
AK
Ankur K.
Jun 19, 2024
Java Rest API
Niravdas is a professional and an expert and helped me with my work deliverables.
About Niravdas
Lead Java Developer | Spring Boot | Java Back-end | Microservice | AI
100%
Job Success
Ahmedabad, India - 3:36 pm local time
⚡ Full-Cycle Backend Development & Architecture
⚡ AI-Powered Development for Faster Delivery & Better Code Quality
👀 Click Invite or Hire for Scalable Java Backend Solutions
Looking for a Java Developer who can build scalable backend systems, SaaS platforms, enterprise applications, and cloud-native solutions designed for long-term growth?
For 8+ years, I have helped startups, SaaS companies, fintech businesses, AdTech platforms, and enterprise organizations build secure, scalable, and high-performance software using Java, Spring Boot, PostgreSQL, MySQL, Kafka, GraphQL, AWS, Docker, Kubernetes, and modern cloud technologies.
From backend architecture and microservices development to legacy application modernization, API integrations, troubleshooting, cloud deployments, and AI-assisted engineering, I deliver production-ready solutions built to scale.
👉 WHAT YOU GET:
✔️ Java Backend Development & Software Architecture
✔️ Spring Boot Applications & Microservices
✔️ REST APIs, GraphQL APIs & Integrations
✔️ Cloud-Native Applications using AWS
✔️ AI-Assisted Development & Automation
✔️ Legacy System Modernization
✔️ Long-Term Support, Maintenance & Optimization
🏆 KEY ACHIEVEMENTS:
✔️ 8+ years building Java, Spring Boot, and enterprise backend applications
✔️ Built scalable SaaS platforms, fintech applications, AdTech systems, and enterprise software
✔️ Maintained and enhanced 15+ production microservices
✔️ Contributed to Adstrome, TrustArc, Acquia DAM, and Digi-Docket
✔️ Designed secure APIs, event-driven systems, and scalable architectures
✔️ Improved application performance through optimization and modernization
⚙️ CORE EXPERTISE:
✔️ Java, Core Java, Java EE, Spring Boot, Spring MVC, Spring Security
✔️ Hibernate, JPA, JDBC, MyBatis, ORM Frameworks, REST APIs, GraphQL APIs
✔️ Microservices Architecture, Apache Kafka, Event-Driven Systems
✔️ PostgreSQL, MySQL, Snowflake, Query Optimization
✔️ AWS, Docker, Kubernetes, Jenkins, Maven, Gradle, Git, GitHub, Bitbucket, Version Control Systems
✔️ Authentication, Authorization, RBAC, Multi-Tenant SaaS
✔️ ZK Framework & Enterprise Web Application Development
🛠 DEVELOPMENT & MAINTENANCE:
✔️ Web Application Development & Enterprise Software Development
✔️ Spring MVC & ZK Framework Application Development
✔️ Legacy Application Maintenance, Modernization & Application Upgrades
✔️ Feature Development & Application Enhancements
✔️ Bug Fixing, Root Cause Analysis & Production Support
✔️ Performance Bottleneck Analysis & Optimization
✔️ Memory Leak Detection & Resolution
✔️ Security Vulnerability & CVE Remediation
✔️ Third-Party API Integration & Business Workflow Automation
✔️ Performance Optimization & Scalability Improvements
☁️ CLOUD & DEVOPS:
✔️ AWS Cloud Services, Docker Containerization & Containerized Application Deployment
✔️ Kubernetes Container Orchestration for Scalable Cloud Infrastructure
✔️ Linux-Based Server Systems, Linux Server Administration & Linux Server Troubleshooting
✔️ Apache Tomcat Installation, Deployment, Monitoring & Performance Tuning
✔️ CI/CD Pipelines, Jenkins Automation, Git, GitHub, Bitbucket & Version Control Systems
✔️ Web Application Troubleshooting, Production Environment Support & Incident Resolution
🧪 TESTING & QUALITY:
✔️ JUnit, Mockito, Unit Testing & Integration Testing
✔️ Test-Driven Development & Automated Testing
✔️ API Testing, Debugging & Log Analysis
✔️ Root Cause Investigation & Production Stability
✔️ Code Quality Improvements & Maintainable Software Development
✔️ Regression Testing & Application Reliability Improvements
🤖 AI-ENHANCED ENGINEERING:
✔️ AI-Assisted Development & AI-Powered Coding Workflows
✔️ OpenAI API Integration, LLM Workflows & AI Automation
✔️ AI-Assisted Testing, Refactoring & Documentation
✔️ Faster Delivery Through AI-Enhanced Engineering
🏢 INDUSTRY EXPERIENCE:
✔️ SaaS Platforms & Enterprise Applications
✔️ AdTech & Programmatic Advertising
✔️ Fintech & Loan Processing
✔️ Privacy & Compliance Systems
✔️ Digital Asset Management
✔️ Multi-Tenant & White-Label Solutions
🚀 WHY CLIENTS CHOOSE ME:
✔️ 8+ Years of Java Development Experience
✔️ Enterprise SaaS & Microservices Expertise
✔️ Strong Spring Boot & Cloud-Native Skills
✔️ Scalable, Secure & Maintainable Solutions
Whether you need to build a backend platform from scratch, scale an existing SaaS application, maintain a legacy system, resolve performance bottlenecks, remediate security vulnerabilities, implement microservices, modernize enterprise software, deploy applications on Tomcat or Linux-based server systems, integrate AI capabilities, or optimize application performance, I can help.
Looking for a Java Developer, Senior Java Developer, Java Backend Developer, Spring Boot Developer, Java Architect, Backend Engineer, Enterprise Software Developer, API Developer, GraphQL Developer, AWS Developer, Cloud Engineer, Kafka Developer, Software Architect, Backend Architect, or Java Consultant?
Steps for completing your project
After purchasing the project, send requirements so Niravdas can start the project.
Delivery time starts when Niravdas receives requirements from you.
Niravdas works on your project following the steps below.
Revisions may occur after the delivery date.
Review & Plan
Review the existing Java application, codebase, current versions, requirements, and modernization goals, then define the upgrade approach.
Modernize & Optimize
Modernize the Java/Spring Boot application, refactor legacy components, improve performance, and implement the agreed changes.