Java Spring Codebase Upgrade

@OutsourceMan

⭐⭐⭐⭐⭐ We at CnELIndia, led by Raman Ladhani, specialize in modernizing legacy Java applications and have extensive experience migrating Spring/Hibernate projects to Spring Boot 3. Our approach will start with a thorough code audit of your current application to identify deprecated APIs, XML configurations, and legacy patterns. We will incrementally refactor the service and data layers using Spring Data JPA and Hibernate 6, ensuring all entity mappings and business logic remain intact. Frequent commits with pull requests will maintain transparency, and automated tests will validate PostgreSQL 15 integration. We will provide a clear migration guide detailing structural changes, deprecation resolutions, and best practices, ensuring zero SonarLint issues and compliance with google-java-format throughout. This structured process guarantees a clean, modern Spring Boot 3 application aligned with your project goals.

@techplusintl

Hi there, I understand that you need to migrate an older Java backend into a fresh Spring Boot 3 project. The focus is on code refactoring and modernization. I will work on untangling the dated patterns, replacing XML configuration with annotations, and adopting Spring Data JPA. Here are the deliverables: - A runnable Spring Boot 3.x application that keeps all existing business logic. - Updated entity mappings that work with Hibernate 6 and JPA annotations. - Refactored service layer that follows current Spring patterns. - A concise migration guide that highlights major structural changes and any breaking points. I will ensure that the application starts without deprecation warnings, all existing integration tests pass against PostgreSQL 15, and the code complies with google-java-format with no issues on SonarLint. I will work incrementally, push frequent commits, and raise pull requests to keep the migration process transparent. You will have a modernized codebase that is ready for future development. Regards, Burhan Ahmad

@LiveExperts

Hello, As a seasoned developer with a strong background in Java and MySQL, I am confident that I can successfully upgrade your codebase and navigate the code refactoring process effectively. I have vast experience in transitioning legacy systems into modernized frameworks, particularly with Spring. My deep understanding of Spring and Hibernate paired with my proficiency in untangling dated patterns, adopting the latest syntax, and refactoring deprecated code will ensure your project is modernized and up-to-date without compromising the existing business logic. In addition to my technical expertise, I highly value effective project management, transparency, and accountability. My methodical approach aligns perfectly with your expectations - incremental progress, frequent commits, transparent review process via pull requests to ensure your satisfaction every step of the way. Not only will your final deliverables meet all the acceptance criteria, but you'll also receive a thorough migration guide which documents any major structural changes made during the process. Choose Live Experts and gain access to our diverse skillset arsenal in research writing, Big Data analysis, game/web development, as well as proficiency in engineering tools like AutoCAD and Solid works which can be exceptionally useful for documentation purposes. Let's transform your legacy project into a modern, efficient one that enhances your business operations. Contac Thanks!

@rohitpatidar001

As a seasoned Java developer with over 9 years of experience, I bring a wealth of skills to this project. Having worked extensively with the Java/Spring stack, I am well-versed in not only modern Spring Boot frameworks but also refactoring and upgrading legacy codebases, which is precisely what your application requires. I'm confident that my skills and proficiency can guarantee a smooth migration process and result in a fully modernized codebase. In addition to my expertise in Java and Spring, I'm also familiar with Hibernate, JPA annotations, and Google's java-format; all of which are essential for your project. Moreover, my work aligns closely with your acceptance criteria. I'm well-versed in running successful CI/CD pipelines, ensuring robustness in the application by complying with SonarLint standards, and delivering high-quality code that guarantees zero deprecation warnings. I pride myself on being highly transparent throughout the development process. Therefore, I'll adopt your preferred workflow of incremental commits and pull requests to ensure that you're fully informed about each step, while maintaining the project's reviewability. My ultimate goal is to deliver a fully functional, superior-quality Spring Boot 3.x application that preserves your existing business logic effectively and incorporates all necessary structural modifications delineated in the migration guide. Thank you for your consideration!

@Feriver

Hello, I can migrate your legacy Spring/Hibernate backend to a clean, production-ready Spring Boot 3.x stack while preserving all business logic. I have hands-on experience upgrading Spring 4/5 apps to Boot 3 with Hibernate 6 and Jakarta namespace alignment. I will replace XML configs with Java-based configuration and annotations, refactor DAOs to Spring Data JPA, remove deprecated APIs, and modernize the service layer using current Spring patterns. Entity mappings will be fully compatible with Hibernate 6 and PostgreSQL 15. All changes will be incremental via PRs, keeping GitHub Actions green. I will ensure zero deprecation warnings, passing integration tests, google-java-format compliance, and clean SonarLint results. A concise migration guide will document structural changes and breaking points. Thanks, Asif

@intelliresponse

With 13+ years of experience in software development and a specialization in full-stack projects, I’m confident that I can handle your Java Spring Codebase Upgrade. Shaping legacy code into modern, well-crafted applications is not just a skill of mine, but my passion. In addition to my extensive knowledge of Java and MySQL, I have a deep understanding of the Spring framework which will be crucial for tackling your project successfully. Your project necessitates not only strong technical skills but also the propensity to adapt current coding standards and keeping things future-proof— these are domains where I excel. By choosing me for the task, you gain a diligent, skillful partner who'll work tirelessly to bring your java backend up to speed. Let's ensure the application starts cleanly without deprecation warnings while all existing integration tests pass against PostgreSQL 15 together.

@toriquldev123

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam

@juanjosec63

Hello, I’m excited about the opportunity to contribute to your project. With my expertise in modernizing legacy Spring/Hibernate codebases into Spring Boot 3.x, migrating to Hibernate 6 with annotation-based JPA mappings, and refactoring toward Spring Data JPA and current Spring idioms, I can preserve your existing business logic while removing outdated patterns, XML wiring, and deprecated APIs. I’ll tailor the work to your incremental PR-driven workflow by migrating module-by-module with frequent commits, keeping GitHub Actions green, aligning code style to google-java-format, and ensuring PostgreSQL 15 compatibility while tightening the service layer and configuration to clean, reviewable Spring Boot conventions. You can expect clear communication, fast turnaround, and a production-ready Spring Boot 3 application plus a concise migration guide documenting structural changes and any breaking points your team should be aware of. Best regards, Juan

@ParasTech7

I have 21 years of experience, Principal Software engineer, extensive experince with Spring boot java, Hiberante, JPQL, build microservices based application with spring security, extensive api development. I have understood your requirement and can deliver fully.

@usmanbashir12100

Hi, I can modernize your legacy Spring + Hibernate backend into a clean, Spring Boot 3.x application while preserving all existing business logic. I’ll refactor XML configs to annotation-based setup, migrate to Spring Data JPA, update entity mappings for Hibernate 6, and remove deprecated APIs. I’ll work incrementally with frequent commits and PRs, keeping GitHub Actions green and adhering to google-java-format and SonarLint standards. Deliverables will include a runnable Spring Boot 3 app, passing all integration tests on PostgreSQL 15, plus a concise migration guide documenting structural changes and any breaking points. I’ve handled similar legacy-to-modern Spring migrations and am ready to start once repo access is granted.

@shakilan4

Hi, I can modernize your legacy Spring/Hibernate backend by migrating it cleanly to Spring Boot 3 with annotation-based configuration and Spring Data JPA while preserving existing business logic. I’ll refactor outdated patterns, ensure Hibernate 6 compatibility, maintain green CI builds, and deliver a stable, production-ready codebase with full documentation. Best regards, Shakila Naz

@sivakumar676

─── ⚡⭐⋆☆⋆⭐⚡ ─── Hi, Client I specialize in modernizing legacy Spring applications to Spring Boot, refactoring code, and replacing outdated practices with modern solutions. I’ve worked on projects similar to yours, where I migrated from legacy Spring/Hibernate to Spring Boot 3, adopted Spring Data JPA, and eliminated deprecated APIs. Your goal is a clean, modern Spring Boot 3 application that keeps all business logic intact while cleaning up legacy patterns and ensuring everything runs smoothly on PostgreSQL 15. So, I'll: Refactor your current Spring application into Spring Boot 3, updating entity mappings to JPA annotations. Replace XML configurations with annotations, clean up deprecated APIs, and update the service layer following Spring Boot 3 best practices. Deliver a migration guide, highlighting key structural changes and breaking points, while maintaining passing integration tests. Best, Siva

@billybryan98

Hello, I hope you’re well. I’ve helped teams modernize aging Java backends into clean, maintainable Spring Boot architectures, without losing the business logic that matters. I’ll approach this as a careful refactor: replace XML config with annotations, adopt Spring Data JPA, and align Hibernate mappings with 6 standards, all while preserving existing behavior and tests. I’ve migrated legacy Spring/Hibernate projects to Spring Boot 3.x before, replacing outdated patterns with current best practices: modularized services, well-defined repositories, and non-breaking integration points. I’ll work in small, reviewable increments, push frequent commits, and raise PRs so the migration stays transparent and testable. I’ll ensure the app starts cleanly, skips deprecated APIs, and passes tests against PostgreSQL 15 while meeting google-java-format and SonarLint standards. I can start immediately and tailor a milestone-driven plan around your repo access. I will deliver a runnable Spring Boot 3.x app, updated entity mappings for Hibernate 6, a refactored service layer, and a concise migration guide.

@engmalaa

As an experienced Java developer and the founder of Avalon AI, I possess significant skills and a keen familiarity with Java Spring and all its versions. I understand that upgrading your legacy codebase can be a complex task requiring both technical proficiency and attention to detail. Having been involved in similar projects before, I am confident in my ability to refactor your code effectively, replacing outdated patterns and configurations with modern, maintainable solutions using XML configurations alongside Spring Data JPA. Moreover, my extensive experience in software automation including workflow automation and Cloud deployments (Docker, AWS, Firebase, Vercel) will prove invaluable for a smooth GitHub Action integration where every pull request will ensure a green build by keeping the process transparent and reviewable. My work ethic involves pushing frequent commits and raising continuous pull requests, guaranteeing your consistent visibility throughout the project lifecycle. In conclusion, I offer not only my comprehensive technical grasp but also strategic insights garnered from 10+ years of industry experience. I am confident in delivering a clean Java Spring Boot 3.x application that is future-proofed far beyond this migration project—a value proposition that sets me apart in this market- so let's create something brilliant together!

@Milos2023

Hello there, I can help you migrate your legacy Spring/Hibernate backend to a clean Spring Boot 3.x application while preserving all existing business logic. I’ve modernized older Java stacks before—removing XML configs, replacing outdated patterns, upgrading to Hibernate 6, and adopting Spring Data JPA without breaking behavior. I’ll work incrementally with small, clear PRs so every change is reviewable and GitHub Actions stays green. What I’ll deliver: • A fully runnable Spring Boot 3.x app • Updated JPA entity mappings compatible with Hibernate 6 • Refactored services using modern Spring best practices • All integration tests passing on PostgreSQL 15 • Zero deprecation warnings, google-java-format compliant, clean SonarLint • A concise migration guide outlining structural changes My approach is careful refactoring—not rewriting—so the system remains stable and future-proof. I’m ready to get access to the repo and define the first milestone. Best regards, Milos

@rbtech1984

Hello There!!! ★★★★ ( Spring Boot Codebase Upgrade ) ★★★★ I’ve reviewed your goal to modernize a legacy Spring/Hibernate backend into a clean Spring Boot 3.x application while preserving all existing business logic. The focus on annotation migration, Hibernate 6 compatibility, and keeping CI green is well understood. ⚜ Legacy Spring to Spring Boot 3 migration ⚜ XML to annotation-based refactoring ⚜ Spring Data JPA adoption ⚜ Hibernate 6 entity compatibility ⚜ Clean service-layer modernization ⚜ GitHub PR driven workflow ⚜ SonarLint & google-java-format compliance I bring 9+ years in Java backend modernisation, having upgraded multiple monoliths to Spring Boot with zero business logic drift. I enjoy cleaning legacy code and making it future ready. My approach is incremental refactor, test-first validation on PostgreSQL 15, and strict CI checks via GitHub Actions to keep builds green. Let’s discuss first milestone and repo access. Warm Regards, Farhin B.

@harfarooqi

Hi I have 6+ years of experience in java, spring boot and microservices. I have prior experience of converting legacy java code to spring boot application. Please provide git repo access of legacy code. Thanks

@Ahmedh058

Hi there, I’m Ahmed from Eastvale, California — a Senior Full-Stack & AI Engineer with over 15 years of experience building high-quality web and mobile applications. After reviewing your job posting, I’m confident that my background and skill set make me an excellent fit for your project — Java Spring Codebase Upgrade . I’ve successfully completed similar projects in the past, so you can expect reliable communication, clean and scalable code, and results delivered on time. I’m ready to get started right away and would love the opportunity to bring your vision to life. Looking forward to working with you. Best regards, Ahmed Hassan

@mickeysz

Hello, I’m a backend developer with strong experience in Java, Spring Boot, Hibernate, and PostgreSQL, and I’ve modernized legacy Spring (XML-heavy) applications into clean Spring Boot 2/3 stacks before. In previous migrations, I replaced XML configs with Java-based configuration and annotations, moved DAO layers to Spring Data JPA, upgraded to Hibernate 6-compatible mappings, and refactored service layers toward cleaner transactional boundaries and constructor injection patterns. I’m comfortable working incrementally with structured PRs, keeping GitHub Actions green, and ensuring integration tests pass consistently against PostgreSQL 15. I understand this is pure modernization—no feature creep—and I’ll focus on preserving business logic while eliminating deprecated APIs and aligning with current Spring Boot 3 best practices. Quick questions: is the current project on Spring 4.x or 5.x, and are there any custom Hibernate interceptors or legacy transaction managers that need special handling? Happy to start with the first milestone and provide a clear migration guide summarizing structural changes and breaking adjustments. Best regards, Mickey