Java App migration (Dropwizard → Spring Boot)

@mariakhan73700

With over [number of years of experience] years of professional software development experience, I am confident in my ability to deliver tailored and bug-free solutions for your Java application customization needs. As a Java expert, I am already adequately skilled with both Dropwizard and Spring Boot frameworks. Migrating your backend architecture from Jetty to Spring Boot is a task that I can handle with ease, as it plays to my specialization in ensuring clean code and optimal app performance. In addition, replacing your foundationDb database with Apache Cassandra is a challenge I am excited to take on. As an experienced Java developer, I am intimately familiar with various databases, including Cassandra, and can seamlessly integrate it into your existing system. My focus on scalability ensures that your application will retain the same efficiency during this transition. Lastly, I possess a broad spectrum of skills beyond Java development which includes Kotlin, React Native and Flutter. This makes me highly adaptable and capable of working with diverse technologies. Therefore, I am confident that hiring me will not only guarantee impeccable customization up to industry standards but also streamlined communication and prompt delivery. Thank you for considering my profile for this project, look forward to discussing your specific requirements further!

@sakshitiwari2323

Hi, We can handle the end-to-end migration of your system from Dropwizard + FoundationDB to a modern, scalable stack using Spring Boot + Cassandra, with Redis, RabbitMQ, and a clean gRPC bridge for your WebSocket layer. Our approach: • Set up Spring Boot skeleton, HAProxy, Cassandra cluster & data migration scripts • Replace Dropwizard routes with Spring Boot REST APIs • Integrate Redis (caching) and RabbitMQ (async messaging) • Build Elixir/Phoenix → gRPC → Spring Boot bridge over UDS • Ensure API compatibility, full testing, and validation • Deploy, test, and stabilize everything on your VM Deliverables: ✔ Fully migrated Spring Boot backend ✔ Cassandra-based persistence ✔ Data migration & rollback scripts ✔ gRPC bridge for Messenger/WebSocket layer ✔ Redis & RabbitMQ integration ✔ VM deployment, testing & complete documentation Happy to walk you through the migration plan and timelines on a quick call. Regards Sakshi!

@NEHABHAT92

As someone who thrives on challenges and has immersed themselves in the IT world for the past 9+ years, I am confident in my ability to successfully complete this project. My deep understanding of Java, specifically implementing spring boot and Cassandra in java based applications will enable a streamlined transition from Jetty and FoundationDb. Furthermore, my proficiency in Mobile and web application development ensures that not only will your backend applications adapt seamlessly to Spring framework but the entire system will harmonize with the new database effortlessly. I have created various E-commerce and CMS-based websites throughout my career, giving me a unique perspective as your data migration strategy will need to take all components into consideration. Above all, what sets me apart is my commitment to turning my client's ideas into reality. Your project is an exciting opportunity and by entrusting it to me, you benefit from my affordable cost structure coupled with robust after-delivery support. Plus, if there were any further concerns on hosting or domain offers, They are wholly managed by us. Let's work together to breathe new life into your java application!

@arbu1499

Hi there, Migrating from Dropwizard (Jetty) to Spring Boot and replacing FoundationDB with Apache Cassandra is a significant architectural shift, and I understand the need to handle it cleanly without disrupting existing services. I can help refactor your current Java backend into a structured Spring Boot setup (controllers, services, configs), while redesigning the data layer to align with Cassandra’s distributed, query-driven modeling approach. I’ll ensure smooth API continuity, proper dependency migration, and stable database integration with performance considerations in mind. Happy to review your current repo and outline a safe migration plan with timelines. Looking forward for your positive response in the chatbox. Best Regards, Arbaz H

@anirudhat

I have extensive experience migrating Java applications from Dropwizard/Jetty to Spring Boot and can handle your framework replacement end-to-end. My approach will begin with analyzing your existing Dropwizard resource classes, health checks, and configuration, then systematically refactoring them into Spring Boot controllers, actuator endpoints, and application properties while preserving your business logic intact. For the FoundationDB to Apache Cassandra migration, I'll design an optimized schema tailored to your query patterns, build the data migration pipeline, and integrate Spring Data Cassandra for seamless repository-layer access. I've completed similar dual-migration projects before and can start immediately to ensure a smooth, zero-downtime transition.

@hr157

Hello, I’m a senior Java backend developer with 10+ years of experience modernizing legacy architectures and performing framework and database migrations in production environments. I have hands-on experience with: • Spring Boot (REST APIs, Actuator, Micrometer, security, configuration) • Dropwizard-based services and JAX-RS resource migration • Distributed databases including Cassandra • Data model redesign for query-driven NoSQL systems • Transactional logic refactoring and eventual-consistency patterns For this project, I would approach it in controlled phases: 1. Spin up a parallel Spring Boot service structure. 2. Gradually migrate REST controllers, filters, configs, and metrics. 3. Redesign the data model for Cassandra based on query patterns (not schema-first). 4. Replace FoundationDB access layer with Spring Data Cassandra. 5. Implement migration scripts and dual-write strategy (if needed) to ensure safe transition. 6. Validate consistency, performance, and failure scenarios before cutover. I understand that FoundationDB provides strong ACID guarantees while Cassandra operates with eventual consistency, so careful attention to transaction semantics, idempotency, and data integrity will be critical. You’ll receive clean, well-documented code, a structured migration plan, and clear deployment steps to ensure minimal disruption. Let's talk

@NehalSK

Hi. I can assist with migrating your backend from Dropwizard to Spring Boot and transitioning your database from FoundationDB to Apache Cassandra. I have the necessary experience with Java-based architectures to ensure a seamless shift while maintaining API compatibility. I will use AI tools to fast-track the refactoring process and port existing tests to the new Spring Boot environment. My plan involves mapping FoundationDB schemas to Cassandra, writing custom data migration scripts, and implementing new tests to verify a successful migration. I am available to start immediately and would love to discuss the project timeline with you. Excited to hear from you, Nehal

@abhayk49

Hi, I have strong experience in Java backend modernization and migration projects, including moving from Dropwizard to Spring Boot and migrating distributed databases. Your requirement (Dropwizard → Spring Boot + FoundationDB → Cassandra) can be handled with a structured and low-risk migration approach. ✅ Relevant Expertise ✅ Java 8–21 ✅ Spring Boot & REST API development ✅ Dropwizard (Jetty) migration ✅ Apache Cassandra data modeling ✅ Data migration scripting ✅ Microservices & distributed systems ✅ Docker / AWS deployment ? Migration Plan • Convert Dropwizard services to Spring Boot (@RestController, config, exception handling) • Redesign persistence layer for Cassandra (query-driven schema, partition strategy) • Develop data migration scripts (FoundationDB → Cassandra) • Validate API compatibility & regression testing • Provide deployment support & documentation ✔ Fully migrated Spring Boot backend ✔ Cassandra-based persistence layer ✔ Data migration scripts ✔ API compatibility validation ✔ Deployment support I focus on clean architecture, backward compatibility, and stable production deployment. Let’s discuss your current service size and data volume to define the timeline. Best regards, Abhay

@robertw0802

Hi there!, I’m Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications, with strengths in Backend Development, Database Management, and Software Development. I have successfully transitioned frameworks in existing applications, having recently migrated a legacy system from Dropwizard to Spring Boot while ensuring seamless functionality and enhanced performance. With my deep technical background in Java and database management, I understand the importance of this migration to improve your application's performance and scalability. I can complete this project perfectly and deliver scalable, production-ready results. My commitment to clean architecture, structured documentation, and CI/CD automation ensures that the solutions I deliver are maintainable and secure. Let’s connect to refine your requirements and begin building a solution that exceeds expectations. What specific features or functionalities are you hoping to enhance with this migration? Thanks,

@iNobleinfoway

Dear Client, Warm Greetings! We understand that you are looking for a developer to convert your application into Spring Boot and Cassandra. Our developers have knowledge an application migration. We are ready to start your requirement immediately. We are iNoble Infoway Pvt. Ltd., a software and IT company located in Coimbatore, Tamil Nadu. We are a team 50+ developers with 1-12 years of experience. Looking forward to your response via chat to discuss the requirement in detail. Based on our discussion, we will provide the detailed time estimation and budget. Regards, iNoble Team.

@jovand30

Hello, I can manage the full migration from Dropwizard (Jetty) to Spring Boot and from FoundationDB to Apache Cassandra with a structured, low-risk plan. **Approach** First, I’ll analyze the current Dropwizard services, configurations, and REST endpoints to ensure API compatibility. Then I’ll rebuild the backend using Spring Boot (controllers, configuration, exception handling, profiles), keeping all APIs consistent so no client-side changes are required. For the database migration, I’ll redesign the data model using Cassandra best practices (query-driven schema, proper partition/clustering keys) and implement the persistence layer using Spring Data Cassandra. **Data Migration** I will create scripts to extract data from FoundationDB and load it into Cassandra, with validation for data integrity and record counts. **Testing & Deployment** * API compatibility validation * Integration and performance testing * Deployment and full testing on your VM * Clear documentation for build and deployment Deliverables include: ✔ Fully migrated Spring Boot backend ✔ Cassandra-based persistence ✔ Data migration scripts ✔ API validation ✔ Deployment support & documentation I have strong experience in Spring Boot microservices and distributed database migrations and can ensure a clean, production-ready transition. Best regards, Jovan D.

@Hemantt841

You’re looking to replace the Backend Dropwizard framework (Jetty) with Spring Boot and swap out FoundationDB for Apache Cassandra in your Java-based application. I understand you need a seamless transition that maintains application stability while upgrading both the backend framework and database layer. With over 15 years of experience and 200+ projects completed, I specialize in backend development and database management, including extensive work with Java, Spring Boot, and Cassandra. My background ensures I can handle complex migrations like this while optimizing performance and maintainability. I will start by carefully analyzing your current Dropwizard setup and FoundationDB schema, then design the Spring Boot architecture to replicate existing functionality. The migration to Cassandra will involve data modeling aligned with your application’s access patterns. I expect the entire process to take around 3-4 weeks, including thorough testing to ensure a smooth rollout. Feel free to reach out so we can discuss your project details in more depth.

@shivam31

Hello, I will quickly customize java application as per your requirement. I will start it right now. Waiting for your message. Looking forward to working with You! Thanks, Shivam

@sathish2connect

Hi, I have around 15+ years of experience with Java and AWS. I have understood your requirements and interested to work in this project. Thanks for considering my bid.

@Mayanks010

As the founder of Royal IT Service, my name is Mayank and I'm here to provide you with a unique combination of technical expertise and creative capabilities that your project demands. Your need for backend replacement using the popular Spring Boot framework and switching from FoundationDb to Apache Cassandra piques my interest. I not only have the necessary skills for the job, but also years of software development experience under my belt, particularly in backend development. At Royal IT Service, we firmly believe in delivering optimum quality, innovative solutions that align perfectly with our clients' needs. This is why we've developed an extensive understanding of various frameworks and databases - to better equip ourselves to tailor solutions that boost business outcomes. Choosing me for this project guarantees a robust, scalable, and future-ready app with a clean transition from Jetty to Spring Boot and FoundationDb to Apache Cassandra. With my attention to detail, dedication for precision, and determination for high performance, consider this an investment in your project's success. Let's embark on this digital transformation journey together!

@QuickMentor

Java App migration (Dropwizard → Spring Boot) I'm excited after reviewing your project details! With over 5 years of hands-on experience in Web and App Development, I specialize in building high-performing, user-friendly, and fully responsive digital solutions tailored to your business needs. I hold an academic background in Computer Science and have successfully delivered numerous projects across various industries. My expertise includes: Custom Website Development (React, Angular, Laravel, PHP, WordPress, etc.) Mobile App Development (iOS, Android, Flutter, React Native) E-commerce & CMS Solutions (Shopify, WooCommerce, Magento) API Integration & Backend Development UI/UX Design & Prototyping Bug Fixing, Speed Optimization & Maintenance ✔ Clean, Scalable & Secure Code ✔ 100% Mobile & SEO-Friendly ✔ Ongoing Support & Unlimited Revisions Let’s turn your idea into a powerful digital product that exceeds expectations! Check my profile: https://www.freelancer.com/u/QuickMentor Looking forward to working with you!

@drishinfotech

We’ve carefully reviewed your requirement and fully ✅ understand that this is a core backend migration project replacing Dropwizard (Jetty) with Spring Boot, and migrating FoundationDB to Apache Cassandra, while maintaining application stability and performance ✨. This is not just a framework swap it involves architectural refactoring, data-layer redesign, and careful transition planning. ? Deliverables ✔ Fully migrated Spring Boot backend ✔ Cassandra based persistence layer ✔ Data migration scripts ✔ API compatibility validation ✔ Deployment support & documentation Why Me • Strong experience with Java backend refactoring • Hands-on Spring Boot microservices architecture • Production grade Cassandra implementation & tuning • Careful migration planning to reduce business risk

@george170303

Hello, I can assist with migrating your Java-based application by replacing the Backend Dropwizard framework (Jetty) with the Spring Boot framework, ensuring a seamless transition and improved scalability. Additionally, I will handle the database migration from FoundationDB to Apache Cassandra, optimizing data handling for better performance in distributed environments. To achieve this, I will: 1. Refactor the backend architecture to integrate Spring Boot with minimal downtime. 2. Design and implement Apache Cassandra data models aligned with your application's requirements. 3. Ensure data consistency and efficient querying during and after the migration. A couple of questions before we start: 1. Are there any critical APIs or services dependent on Dropwizard that require special attention during migration? 2. Do you have existing data schemas or migration scripts for FoundationDB to help facilitate the Cassandra transition? Regards, George Esterhuizen

@vaibhav2801

I propose migrating the existing Java-based architecture from the Dropwizard (Jetty) framework to Spring Boot to improve scalability, maintainability, and ecosystem support. Spring Boot provides a more comprehensive and flexible framework with strong dependency management, built-in security modules, better integration capabilities, and simplified microservices development. Additionally, I will replace FoundationDB with Apache Cassandra to enhance distributed data handling, fault tolerance, and horizontal scalability. Cassandra’s decentralized architecture and high availability model make it ideal for applications requiring high write throughput and large-scale data distribution. The migration process will include architecture analysis, code refactoring, dependency replacement, API compatibility validation, database schema redesign, data migration strategy, performance benchmarking, and thorough testing to ensure zero downtime and minimal risk. The goal is to deliver a modernized, scalable, and production-ready backend system with improved performance, reliability, and long-term maintainability.