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You will get a complete modernized application

Unni M.Status: Offline
Unni M. Unni M.
4.8
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Unni, priced and ready to go.
Unni M.Status: Offline
Unni M. Unni M.
4.8
Preview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Unni, priced and ready to go.

Project details

You will get a modern application from your legacy version which is cloud savvy. This will leverage your application in your business space so that it can meet new requirements without re-writing the application. We can achieve this migration process by embracing the five golden rules of application modernization. The legacy application is not bad. They are working as expected and generating revenues for years. But, it lacks the adaptability for the new technical challenges in an intuitive way. This is something achieved with this migration process. However, few coding effort is expected in the migration journey which is obvious.
Programming Languages
Python, Java, Go
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Design
What's included
Service Tiers Starter
$500
Standard
$2,000
Advanced
$4,000
Delivery Time 5 days 15 days 60 days
Number of Revisions
223
Design Customization
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Content Upload
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Responsive Design
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Source Code
4.8
110 reviews
88% Complete
(97)
9% Complete
(10)
1% Complete
(1)
1% Complete
(1)
1% Complete
(1)

RK

Raya K.
5.00
Oct 8, 2024
Senior Full Stack Java Developer Needed

MM

MANOJ M.
5.00
Jun 11, 2024
Sr. Java Developer

RL

Ram L.
5.00
Jun 9, 2024
Java expert who can write!

DW

Dan W.
5.00
Feb 16, 2024
Java Developers, Provide feedback on a new AI-enabled extension for IntelliJ Unni did excellent work! Trustworthy and capable. Great communication.

VO

Val O.
5.00
Feb 7, 2024
2 Hr Consultation for Experienced Backend Developer Demonstrated thorough understanding of backend development through his architecture proposal.
Unni M.Status: Offline

About Unni

Unni M.Status: Offline
Java AI Architect | Spring Boot | Legacy Modernization | Performance
82% Job Success
4.8  (110 reviews)
Bangalore, India - 11:15 am local time
I modernize legacy Java systems, build production-grade AI integrations, and fix performance bottlenecks in enterprise applications.

24 years of Java backend experience. 150+ completed Upwork projects, 150+ five-star reviews, 3,000+ hours delivered, $100K+ earned on this platform.

Trusted by: FirstTennessee (Fortune 500) · American Express · EDB Norway · ICICI Bank

I've helped a Fortune 500 banking client cut API response times significantly through JVM and query tuning, and rebuilt legacy monoliths into scalable Spring Boot microservices for enterprise clients across the US and EU.

What I Do Best

Area What that means for you
Java Backend Development: Spring Boot, Quarkus, microservices, REST APIs — 20+ years hands-on
Legacy Modernization: Migrating aging Java monoliths to modern, cloud-ready Spring Boot / Quarkus architectures
Performance Tuning: JVM optimization, query tuning, caching strategies for high-load systems
AI Integration for Java: LangChain4J, RAG pipelines, LLM agents, enterprise AI APIs
Complex Integrations: WebSocket, WebRTC, banking and financial-services APIs
Cloud & Containers: Docker, Kubernetes, AWS (Lambda, DynamoDB, Amplify)
Fullstack (when needed): JavaScript, React, HTML5

AI for Java Applications

I build production AI capabilities directly into Java backends — not prototypes, systems clients can ship:

LLM integration and orchestration (LangChain4J)
Retrieval-Augmented Generation (RAG) pipelines
AI agents and enterprise AI API integration
LLM observability — I created TraceLM, an open-source Java agent for monitoring LLM calls in production, born out of real debugging pain on enterprise projects

Core Technologies

Java & Frameworks: Java 8/11/17, Spring Boot, Quarkus, Spring Framework, JPA/Hibernate, REST APIs, GraphQL, Microservices
AI & LLM: LangChain4J, RAG, LLM Agents, Enterprise AI Integration
Infrastructure: Docker, Kubernetes, AWS, CI/CD
Fullstack: JavaScript, React, HTML5
Specialized: WebSocket, WebRTC

How I Work
Daily async updates via Slack or Upwork
Weekly sync calls when useful
4+ hours overlap with US/EU time zones
First response within 4 working hours
I flag risks early rather than let them surface as surprises

Have a legacy Java system that needs modernizing, or want to add real AI capability to your product? Message me with your project details — I'll respond within 4 hours and can start with a quick technical assessment.

Steps for completing your project

After purchasing the project, send requirements so Unni can start the project.

Delivery time starts when Unni receives requirements from you.

Unni works on your project following the steps below.

Revisions may occur after the delivery date.

Understanding the project

In this step, to gain some basic information about the project.

Understand the project dependencies and versions

Review the work, release payment, and leave feedback to Unni.