Scala Java API Backend Service

@onkarkulkarni8

Hi, I can help with your "Scala Java API Backend Service" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, java, j2ee, mysql, scala, postgresql, api development, rest api, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. You'll get clean commits and clear documentation. Can we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Very Professional and On time delivery of the project" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@chesslover

Java and Scala expert with over 20 years experience. Also with the other Java-based languages Kotlin and Groovy. "Scala Engineer for Functional Programming & AI-Augmented Development": https://www.freelancer.com/projects/chatgpt-ai-integration/Scala-Engineer-for-Functional "Excellent communications and agentic AI skills. Valentino did meticulous work, documented effectively, and continuously incorporated the latest AI techniques as they were released. He didn't just vibe code either. He diligently verified the code and enforced codebase standards." Also: https://www.freelancer.com/projects/scala/Scala-developer-needed-work-Lichess Expert with Scala best practices (e.g., monads), Scala idiomatic functional (FP) and functional reactive programming (FRP), Play! Framework, Akka, and other Scala best libraries.

@zyeloncomputech

Hi sir, Thank you for giving opportunity for biding... we have gone through your requirements and we can do your Scala Java API Backend Service stuff according to your exact requirements. Why You Need To Go With Us? And What Special you get with us. • Your vision = Our mission • Your idea + Our expertise = Winner on Web • Cutting edge web technology & design • Innovative, Cost effective & Customized service • Pragmatic Approach • Constant communication with clients • Consistent performance • On-time delivery • Maintenance of global quality standards • Your online business + Our experience = Your success we have 10+ years experience JAVA SCALA full stack expert available

@TechizeBuilder

Hi, I reviewed **Scala Java API Backend Service** and I'm confident I can deliver exactly what you're looking for. With hands-on experience in **PHP, Java, MySQL, PostgreSQL, API Development**, I build professional, scalable, and user-focused solutions that are designed for performance and growth. I believe in clear communication, quality work, and on-time delivery. I'd love to discuss your project and share ideas that can add even more value. View some of my previous work: Looking forward to hearing from you.

@KarthikTechCon

Hi, I'm Karthik, a Full-Stack Backend Developer with 15+ years of experience building scalable REST APIs, enterprise applications, and SQL-driven backend services. I can develop your Scala/Java modular backend with a clean architecture that integrates seamlessly with your existing codebase while following enterprise-grade engineering practices. What I'll deliver: ✔ Modular REST/JSON APIs using Scala & Java ✔ PostgreSQL/MySQL support with Flyway migrations ✔ Data access using Slick or JPA/Hibernate based on performance and maintainability ✔ OpenAPI/Swagger documentation & Postman collection ✔ Validation, pagination, structured logging & proper HTTP status handling ✔ Unit & integration tests (ScalaTest/JUnit) ✔ Dockerized deployment, CI-ready build scripts & comprehensive README I prioritize clean code, security, performance, and maintainability, ensuring the APIs meet your acceptance criteria, including input validation, SQL injection protection, and sub-200ms response times for typical workloads. Estimated Timeline: 2–4 weeks, depending on the number of endpoints and business logic. I'd be happy to discuss your existing architecture, repository structure, and recommend the best approach for seamless integration. Looking forward to collaborating! – Karthik

@sakshitiwari2323

Hi! This looks like an interesting backend project. Our team has experience building RESTful APIs using Java, Scala, Spring Boot, PostgreSQL/MySQL, Hibernate/JPA, Flyway, Docker, and CI/CD pipelines. We can develop a clean, modular service with OpenAPI/Swagger documentation, secure input validation, pagination, logging, and comprehensive unit/integration tests to ensure everything is production-ready. We'll deliver well-structured source code, migration scripts, Docker setup, Postman collection, and complete documentation. Performance, security, and maintainability will be our priority throughout the project. Happy to discuss your existing architecture and get started! Regards Sakshi!

@FreeLancers360

With my extensive experience as a Full Stack developer, specializing in Web Applications and Custom Software Development, I am confident that I have the necessary skills to complete this project successfully. Alongside my proficiency in popular languages like Scala and Java, I also have a good understanding of SQL databases, particularly PostgreSQL and MySQL. This means that I can ensure effective schema versioning through Flyway while accessing data using either Slick or standard JPA/Hibernate – whichever is best for the task. I understand the need for a clean and well-documented REST/JSON API layer for your project. My past work has always focused on adhering to Restful conventions so you can expect nothing less from me. Furthermore, my experience with Swagger/OpenAPI docs will be invaluable in streamlining documentation and making it easily accessible for future updates. Additionally, I am well versed in writing unit and integration tests using ScalaTest/JUnit which will be key to maintaining code quality moving forward. Not only am I a skillful developer, but I'm also well equipped with the tools required to carry out this project effectively. As mentioned, this includes the ability to Dockerize builds, set up CI-ready scripts and provide a local run, test, and production build commands through a clear README file. With these qualities combined, I am poised to deliver complete source code with a well-structured package

@thiagofoz87

Your requirements are very aligned with the kind of backend services I usually build: modular JVM applications focused on reliability, API consistency, testability, and production readiness. For this project, I would structure the service with clear separation between API, domain, persistence, and integration layers to keep Scala and existing Java modules interoperable without creating build or dependency issues. I can work with sbt/Maven integration, OpenJDK compatibility, Flyway migrations, and PostgreSQL/MySQL support while keeping the codebase maintainable for future extensions. On the API side, I would implement REST endpoints with proper validation, pagination, structured error handling, OpenAPI/Swagger documentation, logging, and standardized HTTP responses. For persistence, I can use either Slick or JPA/Hibernate depending on the complexity and performance requirements of each module. The delivery would include unit/integration tests, Dockerized execution, CI-ready scripts, migration files, and a complete Postman/OpenAPI package so the service can be validated and deployed consistently across environments. Performance and security requirements are also clear in the description. I would pay special attention to query optimization, safe parameterized database access, input validation, and API response consistency to meet the 200 ms target and static analysis checks. I can contribute both to the implementation and to the technical organization of the repository to keep the project review-ready from the beginning.

@marwanehamdani

With my extensive expertise in API development, particularly in the Java and Scala languages, I am confident I will be a perfect fit for your project. My understanding of both Maven and sbt, alongside comprehensive knowledge in OpenJDK, not only helps me smoothly compile code but also guarantees its flawless execution. Your requirements concerning the SQL database align perfectly with my mastery of MySQL and PostgreSQL—and I'm familiar with Flyway, Slick, as well as JPA/Hibernate’s strong points in handling schema versioning and data access. I do not only consider functional requirements but also focus heavily on non-functional aspects like testing and deployment. Carrying out solid tests using ScalaTest/JUnit to ensure reliability is second nature to me. Additionally, executing builds in Docker and providing clear README dashboards reflects my commitment to easy maintenance. Lastly, I want you to know that I approach every project from a comprehensive perspective. In line with your emphasis on data security, I understand the implications of SQL injection vulnerabilities and have practiced robustly addressing them.

@rajeshrolen

Hi, Your project aligns well with our experience in building scalable backend systems and REST APIs. We have strong expertise in Scala, Java, PostgreSQL/MySQL, Flyway, Docker, and API development, and can deliver clean, secure, and well-documented code with comprehensive testing. I'd be happy to discuss your existing architecture, timeline, and how we can integrate seamlessly with your current codebase. Looking forward to connecting!

@mundadiya

Hello, I hope you're having a great day. I've delivered multiple Scala/Java backend services that expose REST/JSON APIs and integrate with SQL databases. On a recent project I added Flyway migrations, used Slick for type-safe queries, adjusted sbt to build alongside Maven modules, and solved Postgres vs MySQL type mapping issues. I'd start by scaffolding modules with sbt, adding OpenAPI/Swagger annotations, wiring Flyway and a lightweight Slick layer, then writing ScalaTest and JUnit tests and a Dockerfile. Would be good to align on the preferred data access (Slick or JPA) and which endpoints need pagination first, could we have a short 10-minute call to confirm the schema shape? Thank you, Alpeshbhai M.

@deepaksonidz

Hi….I read your project description and understood your requirements. Let’s start chat to discuss in details. I have more than 10 years of experience in Web Designing & Development, Mobile Application, CRM, Graphics Design, Game Development, Digital Marketing & Complete Software Solutions.... for quality services connect with me. My Top Skills: Java, Kotlin, Shift, Native Android, XML, Angular, Unity, Node, React Native, Flutter, Python, HTML, HTML5, CSS, Bootstrap, MySql, Wordpress, Core Php, Oops Concept, Framework (Code Igniter, Cake Php, Laravel). Let’s connect via chat to discuss your specific milestones and timeline. Thanks & Regards. Waiting positive response.

@alluankit01

Hi, I can build the modular Scala/Java backend service with clean REST/JSON APIs, SQL database integration, migrations, OpenAPI documentation, tests, Docker setup, and CI-ready structure. The best solution is to first review your existing Java components, database schema, required endpoints, authentication/validation rules, and performance expectations. Then I can implement the new modules in Scala while keeping compatibility with Java, using sbt/Maven, OpenJDK, Flyway migrations, and either Slick or JPA/Hibernate depending on what fits the current codebase best. I’m comfortable with Scala, Java, REST API development, PostgreSQL, MySQL, Flyway, Slick, Hibernate/JPA, OpenAPI/Swagger, pagination, validation, logging, proper HTTP status handling, Docker, ScalaTest/JUnit, integration testing, and CI-ready backend delivery. Deliverables will include: * Complete Scala/Java source code * Clean package structure * REST/JSON API endpoints * SQL schema and Flyway migrations * PostgreSQL/MySQL compatibility * OpenAPI/Swagger documentation * Postman collection * Unit and integration tests * Dockerfile * README with run/test/build steps I’ll focus on secure input handling, no SQL injection risks, maintainable architecture, fast API response times, and code that passes CI and review cleanly. Best regards Ankit

@sanddep5

As an experienced and adaptable developer with a strong emphasis on Java and SQL, I am incredibly well-suited to undertake your Scala Java API Backend Service project. Throughout my career, I have consistently demonstrated my ability to work seamlessly within diverse language stacks, making certain that all components of the codebase are in harmony. Additionally, my familiarity with both Sbt and Maven will ensure a hassle-free compilation process for your project. In terms of database management, I am highly proficient in using PostgreSQL and MySQL, two engines integral to your backend service. My past experiences with flyway schema versioning and data access tools such as Slick and JPA/Hibernate have allowed me to easily navigate complex database systems- guaranteeing a smooth data handling operation for your project. Moreover, I understand the importance of non-functional aspects such as unit testing, Dockerisation and CI-ready scripting for project delivery. I am well acquainted with ScalaTest/JUnit and can expertly create Docker containers for efficient builds in every environment. These skills combined promise tailored solutions ensuring a safe, efficient, and effective backend API layer that is both reliable and scalable.

@eduard141

Hi, I'm interested in your backend API project. I have experience building RESTful services, designing SQL-backed applications, and developing maintainable, well-documented APIs with a strong focus on performance, security, and clean architecture. I can develop a modular service that integrates seamlessly with your existing Scala and Java codebase, implement REST endpoints with OpenAPI/Swagger documentation, Flyway migrations, validation, pagination, structured logging, and comprehensive unit and integration tests. The project will also include a Dockerized build, CI-ready configuration, a Postman collection, and clear documentation for deployment and maintenance. I prioritize secure coding practices, efficient database access, and clean, maintainable code to ensure the service meets your performance and quality requirements. I'm available to start immediately and would be happy to discuss your existing architecture and project timeline. Looking forward to working with you. Best regards, Eduard

@AcuteTech06

Hello, We can develop and enhance your Scala/Java backend service with robust API integration, clean architecture, and optimized performance. Ready to start immediately and deliver a reliable, scalable solution. Regards, Acute Tech Solutions

@tamannarajput18

As an experienced Full Stack Developer and automation specialist, I am confident in my ability to deliver a modular backend service that meets your specific requirements for this project. Firstly, with an emphasis on delivering clean architectures and optimized performance, I have extensive experience in working with Java and Scala, the languages central to your project. Finally, let's not forget the importance of robust testing, which is another one of my core strengths. I have hands-on experience with tools specifically catered towards testing Scala/Java applications such as ScalaTest/JUnit. To summarize, by choosing me for this project, you're receiving a dedicated professional who will use their skills and knowledge to deliver quality solutions that meet all aspects of your brief in an efficient and reliable manner. Let's work together to build a high-functioning API-focused system that reflects an accurate embodiment of your requirements.

@richardb063

Hello, I can build a **modular Scala/Java backend** with a clean RESTful API that integrates seamlessly with your existing SQL database while remaining compatible with **OpenJDK, sbt/Maven**, and your current architecture. The service will include OpenAPI/Swagger documentation, validation, pagination, structured logging, Flyway migrations, secure database access using **Slick or JPA/Hibernate**, and comprehensive unit/integration tests. You'll receive well-organized source code, migration scripts, a Postman collection, Docker configuration, CI-ready build scripts, and clear documentation for local development and deployment. I'll ensure the API follows REST best practices, uses parameterized queries to prevent SQL injection, and is optimized to meet your performance and reliability requirements. Best

@caodung171800

Dear Client, I hope this message finds you well. I came across your Scala/Java backend service project and I am genuinely excited. I have strong experience building REST APIs with Scala, Java, and SQL databases, and I would love to help you create this clean, well-documented service. What is the target? You need a modular backend service in Scala/Java exposing a REST/JSON API to an existing SQL database—with Swagger docs, pagination, validation, logging, Flyway migrations, unit/integration tests, and Dockerised CI-ready build. Core skills: Scala / Java (sbt/Maven) PostgreSQL / MySQL (Slick or JPA) REST API Design & OpenAPI Flyway Schema Versioning Docker & CI/CD How I solve & deliver: Design clean package structure with shared business logic. Build REST endpoints with validation, pagination, and logging. Set up Flyway migrations and data access layer. Add ScalaTest/JUnit tests and OpenAPI docs. Deliver Dockerfile, README, and Postman collection. Thank you for your time. I am confident I can deliver a robust, production-ready API. Best Regards