You will get refactor and modernization of your legacy java backend code safely
Project details
Legacy backend systems often become hard to maintain, slow to change, and risky to evolve. I help businesses safely refactor and modernize existing Java and Spring backends without breaking critical functionality.
In this gig, I focus on improving code quality, reliability, and long-term maintainability while preserving current behavior. If your system suffers from technical debt, unclear structure, performance issues, or increasing maintenance costs, I work incrementally and carefully to stabilize and improve it.
Depending on the package, I can review your codebase, refactor selected modules, improve architecture and structure, and align the system with modern backend best practices. My approach prioritizes safety, clarity, and scalability, making your backend easier to maintain, test, and extend.
This service is ideal for businesses with existing production systems that need to reduce risk, improve performance, or prepare for future growth without a full rewrite. I mainly work with Java, Spring-based backends, and REST APIs handling real users and traffic.
In this gig, I focus on improving code quality, reliability, and long-term maintainability while preserving current behavior. If your system suffers from technical debt, unclear structure, performance issues, or increasing maintenance costs, I work incrementally and carefully to stabilize and improve it.
Depending on the package, I can review your codebase, refactor selected modules, improve architecture and structure, and align the system with modern backend best practices. My approach prioritizes safety, clarity, and scalability, making your backend easier to maintain, test, and extend.
This service is ideal for businesses with existing production systems that need to reduce risk, improve performance, or prepare for future growth without a full rewrite. I mainly work with Java, Spring-based backends, and REST APIs handling real users and traffic.
Programming Languages
Python, JavaCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$100
|
Standard
$250
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 2 days | 7 days | 10 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$30Frequently asked questions
About Ivan
Backend Software Engineer in MercadoLibre
Buenos Aires, Argentina - 5:13 pm local time
I specialize in fixing legacy or fragile backends, improving performance under real traffic, and designing production-ready architectures for startups and growing businesses. I work closely with founders and engineering teams to turn complex requirements into systems that actually work in the real world.
My focus is always on: Reliability and uptime, Predictable performance under load and Clean maintainable architectures that reduce long-term cost and risk
Steps for completing your project
After purchasing the project, send requirements so Ivan can start the project.
Delivery time starts when Ivan receives requirements from you.
Ivan works on your project following the steps below.
Revisions may occur after the delivery date.
Codebase Review & Scope Definition
I start by reviewing your existing codebase to understand current behavior, architecture, and pain points. We agree on a clear refactoring scope to avoid breaking changes or unexpected work.
Safe Refactoring & Improvements
I refactor the agreed modules incrementally, improving structure, readability, and reliability while preserving existing functionality.