Secure Spring Boot Mobile Backend (Full Stack)

@manifestinfo

Hello, I’ve reviewed your requirements for the Java Spring Boot backend, and this aligns well with our experience building secure, scalable APIs for mobile applications. I’m Neilesh Chouksey, a senior full-stack developer with 10+ years of experience, leading a team skilled in Java, Spring Boot, Spring Security, Hibernate, MySQL, and PostgreSQL. We have delivered multiple backends with JWT-based authentication, MFA flows, onboarding pipelines, and fully documented REST APIs. For your project, we can: • Implement secure authentication with MFA and future multi-party flows • Build the onboarding journey with full audit-ready milestones • Design a database compatible with both MySQL and PostgreSQL • Deliver contract-first REST APIs documented via Swagger/OpenAPI • Provide unit and integration tests, Postman collection, and Docker-Compose setup The code will follow clean architecture, pass all Maven tests, and run with a single command. I’d be happy to discuss edge cases, timelines, and your API contracts to get started quickly. Best regards, Neilesh Chouksey

@sakshitiwari2323

Hi, I can build a secure, production-ready Spring Boot backend that cleanly supports your mobile app’s authentication and onboarding needs. I’ve worked extensively with Spring Security, MFA flows, JWT-based auth, JPA/Hibernate, and relational databases (both MySQL and PostgreSQL), so aligning with your contract-first API specs will be straightforward. What I’ll deliver Fully implemented auth & onboarding APIs (MFA-ready, audit-safe) Optimised DB schema with migration scripts (MySQL 8 / PostgreSQL 15) Swagger/OpenAPI docs + Postman collection (incl. negative cases) Strong test coverage (unit + integration) Docker-Compose setup for one-command local spin-up Quick questions Preferred MFA method for MVP (TOTP, SMS, Email)? Any compliance or audit requirements to consider early? Target timeline for backend handoff to mobile team? Happy to discuss edge cases and get started immediately. Thanks Sakshi:)

@mykhaylob4

✋ Hi there. I can build a secure Java Spring Boot backend for your mobile app with MFA authentication, contract based REST APIs, and reliable relational database architecture ready for production use. ✔️ I have solid experience with Spring Boot, Spring Security, JWT auth, OAuth flows, JPA Hibernate, MySQL, PostgreSQL, and Docker based deployments. In a previous project, I developed a mobile backend with MFA login, onboarding workflows, audit trails, and Swagger documented APIs with full unit and integration testing through Maven pipelines. ✔️ For your project, I will implement contract first REST endpoints, design normalized database schemas, and build onboarding logic that tracks user milestones with replayable audit logs. I will enforce token based security, session control, password reset flows, and profile management aligned with your API specs and response structures. ✔️ I will prepare migration scripts for MySQL and PostgreSQL, create Postman collections with negative test cases, configure Docker Compose setup, and ensure all services pass automated tests and deploy in a single command. Let’s chat to review your API contracts and timelines. Best regards, Mykhaylo

@belotefreelancer

"I have gone through your description. "This is my area of specialization, i can get it done 100 % perfectly well. Please ping me in person. I can help you to complete all tasks. I have hands-on experience in this field. We have already done similar types of projects. Connect with us for more details. Rest assured your satisfaction is guaranteed." Looking forward to your response." Thank you for your time and I am confident that we will be a great fit for this project. Best,

@Web1devloper

Drawing from my extensive experience in full stack development, I am adept at creating robust and secure backends powered by Java Spring Boot. I take pride in my proficiency with Spring Security, JPA/Hibernate and containerised deployment which aligns perfectly with your requirements. Additionally, I have a keen eye for detail and always ensure thorough unit- and integration-testing to deliver reliable code. Having worked closely with RESTful APIs in the past as well as onboarding flows, I understand the importance of adhering to exact request/response shapes and maintaining persistable milestones for audits. My skills in using both MySQL and PostgreSQL equip me to meet all your data storage and retrieval needs impeccably. Alongside ensuring the functionality of the backend services, I am diligent about creating comprehensive documentation. This includes securing the API endpoints with JWT or similar strategies and documenting them using Swagger/OpenAPI. Additionally, my experience with DevOps tools like Docker-Compose ensures that spinning up code is as simple as one command while complying with all tests via Maven is second nature to me. Let's kickstart this project today!

@ritikgarg55

Hello, my name is Ritik Garg and I am a Full-Stack/Backend Developer with 8+ years of experience working with Python, Django, Restful APIs, Data Mining, Flask, Scrapy, Selenium, Fluter, Mobile Development, Node JS, Angular, React, AWS, DevOps, request, threading and selenium. I have the necessary skills and experience to complete your project within a month's timeline. I specialize in web scraping and have successfully completed many projects related to this. My goal is to give clients over 100% satisfaction by implementing their ideas accurately so that their business thrive and grow. Additionally, I guarantee perfect (100%) quality on every project while being on time and budget delivery as well as flexible work times.. If you choose me for this job, you can count on me providing excellent customer service while staying within your target deadline. Please let me know if you're interested in discussing further or have any other questions. Best regards!

@Kotbithedev

Hello. I just saw your job post and im interested, i have experience with technologies you mentioned, if you accept me to work with you ,you can share more details and i will start working.

@otusonellp

At OTUSONE, our team is well-versed in Java and have invaluable experience with Spring Security, JPA/Hibernate, and containerised deployments. We are confident that we understand your core requirements for the mobile application backend, such as user authentication with multi-factor authentication support, streamlined customer onboarding journey, and reliable data storage using MySQL or PostgreSQL. We also prioritize comprehensive API documentation using Swagger/OpenAPI, robust security measures with JWT tokens, and thorough testing using Maven. In addition to these technical skills, we also ensure that our solutions meet industry standards and are easily maintained by providing clear migration scripts. Our focus on meeting your acceptance criteria fully aligns with your project goals. For example, the persisting of all user milestones during the onboarding stage allows us to create an audit replay function that demonstrates accountability in your system. Furthermore, our proficiency in Docker-Compose helps us deliver a highly efficient deployment process - essential in delivering applications like yours. Lastly, we believe in delivering precise and efficient software but also providing exceptional service along the way.

@jagratip3

Hello, I am an experienced Java Spring Boot developer and can build a robust backend for your mobile application, covering user authentication with MFA, customer onboarding, and secure data storage on MySQL or PostgreSQL. The RESTful APIs will be JWT-secured, documented with Swagger/OpenAPI, and thoroughly unit- and integration-tested. I will create the database schema, migration scripts, and a Postman collection covering positive and negative test cases. Clarification questions: Are there any third-party services for MFA (SMS/email/app) you prefer? Should onboarding support optional additional user roles or multi-party approvals? Any specific constraints for audit replay or logging formats? Preferred Docker deployment environment (cloud provider, local, or both)? Suggested Milestones & Budget User authentication & onboarding APIs Database schema, migration scripts & integration tests Documentation, Postman collection, Docker setup & handover Note: Timeline and exact scope to be finalized after detailed discussion. You will receive a fully tested, containerized, and production-ready Spring Boot backend aligned with your API specs. Looking forward to collaborating! Best regards,

@amaank66

Hello, Your Spring Boot backend requirements align perfectly with our core expertise at CUBEMOONS PVT LTD. We build secure, scalable, API-first systems designed for production use and long-term growth. We will deliver: • Secure user authentication with MFA and future-ready multi-party auth flows • Structured onboarding from registration to verified user profile • Optimized MySQL/PostgreSQL data layer with clean migration scripts • JWT-secured REST APIs with full Swagger/OpenAPI documentation • Contract-first API implementation aligned with your mobile specs • Replayable onboarding flows with audit logging • Dockerized setup with one-command deployment • Full unit + integration testing via Maven • Postman collection including negative cases Stack: Spring Boot · Spring Security · JPA/Hibernate · JWT · OpenAPI · Docker · MySQL/PostgreSQL Our focus is security-first architecture, clean design, and enterprise-grade reliability, ensuring your backend is robust, scalable, and easy for your team to maintain. Happy to align on edge cases and timelines so we can move forward efficiently. Best regards, Amaan Khan P. CUBEMOONS PVT LTD.

@dineshk743

Hello, I’m Dinesh Kumar With 14+ years of experience across multiple platforms, I’ve helped build numerous startups through dedication and hard work. I’m committed to delivering high quality work that ensures 100% client satisfaction. Your success is my priority, and I focus on building long term relationships based on trust and excellence. Expertise: Web & App Development – React.js, Node.js, JavaScript, PHP, MySQL, WordPress, Magento, CodeIgniter, Shopify, .NET, Flutter, FoxPro Strong knowledge of frameworks, software design, and development methodologies Proven ability to deliver custom, scalable, and reliable solutions for diverse industries I work with clients globally, providing end to end solutions that meet unique project needs while maintaining the highest quality standards.

@jrishabh055

Hi dev, I’d be glad to build out a secure, production-grade Spring Boot backend for your mobile application. I have strong experience with Spring Security (JWT + MFA flows), JPA/Hibernate, and designing contract-first REST APIs aligned exactly to OpenAPI/Swagger specs. I’ll implement a robust authentication system with extensible multi-factor and future multi-party auth support, a fully traceable onboarding workflow with audit replay capability, and a relational schema optimized for both MySQL 8 and PostgreSQL 15—complete with clean, portable migration scripts (Flyway/Liquibase). All endpoints will strictly match your provided request/response contracts. The project will include comprehensive unit and integration tests (JUnit + Testcontainers), a complete Postman collection covering positive and negative cases, and Docker Compose setup for one-command spin-up. I focus heavily on clean architecture, maintainability, and security best practices so your mobile team can integrate confidently and scale without friction. I’m ready to review your API specs and discuss edge cases, MFA strategies, and timeline expectations so we can move forward immediately.

@Mayanks010

Hi there, You’re absolutely in the RIGHT PLACE. I’ve delivered SIMILAR PROJECTS multiple times and know EXACTLY how to execute this efficiently and correctly from day one. To lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask you a few key questions. Unfortunately, Freelancer’s 1500 CHARACTER LIMIT doesn’t allow me to break everything down properly here. Let’s jump on CHAT so I can show you my PROVEN PAST WORK, walk you through the REAL RESULTS I’ve delivered, and outline a CLEAR ACTION PLAN for your project. You’ll immediately see why my approach is DIFFERENT and EFFECTIVE. If you’re serious about getting this done RIGHT, I’m ready to move forward. Looking forward to CONNECTING and WINNING TOGETHER. Cheers, Mayank Sahu

@archanasoni1923

Hey, We can handle the Spring Boot backend for your mobile app. Here's what we'll build - full user auth with MFA and multi-party support ready to go, complete onboarding flow that tracks every step for audit purposes, and solid data layer using PostgreSQL (we prefer it but MySQL works too if you need that instead). All APIs will match your contract specs exactly. We'll document everything with Swagger, secure it with JWT, write proper tests, and give you migration scripts that run clean on both MySQL 8 and Postgres 15. What you're getting - sign-up, MFA login, password reset, profile management, session handling all working as specified. Onboarding that saves milestones and can be replayed. Postman collection with every endpoint tested including error cases. Docker-Compose that spins everything up in one go. Happy to talk through any edge cases or timeline before we start. Let's get this moving Regards, Archana Soni

@Hemantt841

With 7 years of experience in Java Spring Boot development, I am the perfect fit for your project requirements. I have worked on similar solutions in the past and have the relevant skills to deliver a robust backend for your mobile application. **How I will complete this project:** - Implement user authentication and management with full MFA support. - Create a seamless customer onboarding journey from registration to profile completion. - Set up reliable data storage using either MySQL or PostgreSQL. - Document RESTful APIs with Swagger/OpenAPI and secure them with JWT. - Thoroughly test all components for unit and integration testing. - Deliver clear migration scripts for database schema updates. **Tech stack I will use:** - Java Spring Boot for backend development. - Spring Security for authentication. - JPA/Hibernate for data persistence. - MySQL or PostgreSQL for database storage. - Swagger/OpenAPI for API documentation. - Docker-Compose for containerised deployment. I have a proven track record of delivering high-quality solutions that meet client requirements. I am confident that I can meet and exceed your expectations for this project. Let's discuss further details and get started on this project right away.

@divyajnu08

I have 10 years of experience in software development majorly in spring boot .I have successfully delivered end to end systems from scratch.

@dhanushdevaraj17

Hello, I can build a secure, production-ready Spring Boot backend aligned exactly with your contract-first API specs. I have hands-on experience with Spring Security, JWT (access + refresh), MFA flows (OTP/TOTP), JPA/Hibernate, and both MySQL & PostgreSQL. I’ll design a clean layered architecture (Controller–Service–Repository) with strong validation, global exception handling, and full Swagger/OpenAPI documentation. Authentication will support: • Secure sign-up & MFA login • Password reset with expiry & replay protection • JWT-based session management • Extensible design for future multi-party auth The onboarding flow will persist milestone states with a replayable audit trail. Database schema and migration scripts (Flyway/Liquibase) will run cleanly on MySQL 8 and PostgreSQL 15. Deliverables include: • Fully tested APIs (unit + integration via Maven) • Exact request/response contract matching • Postman collection (positive + negative cases) • Dockerfile + docker-compose (one-command startup) I focus on security, maintainability, and clean code—not quick patches. Ready to start immediately and discuss edge cases or scaling expectations. Best regards, Dhanush

@vijayakanth89

Hello, I’m excited to bid on your Spring Boot backend project. I bring 14+ years of experience designing and delivering secure, scalable backend systems, currently working as an Engineering Manager / Solution Architect building high-throughput platforms that handle millions of API transactions daily. My background includes developing enterprise and financial-grade applications where authentication, auditability, and data integrity are critical—directly aligning with your requirements. I have deep expertise in Java, Spring Boot, Spring Security, JPA/Hibernate, and RESTful API development, along with strong hands-on experience implementing JWT-based authentication, MFA workflows, and extensible authorization models designed for future multi-party authentication scenarios. I’ve built onboarding systems that track user lifecycle milestones with full audit trails, ensuring replayability and compliance-ready data models. On the persistence side, I regularly design schemas optimized for both MySQL and PostgreSQL, delivering clean migration scripts using Flyway/Liquibase and ensuring cross-database compatibility. I follow a contract-first approach, wiring APIs precisely to OpenAPI/Swagger specs, backed by thorough unit and integration testing. I focus on clean architecture, maintainability, and long-term scalability—not just delivering code, but building a reliable foundation your mobile platform can grow on. Looking forward to collaborating. Best regards, Vijayakanth P

@rohitpatidar001

As a seasoned Java developer with over 9 years of experience under my belt, I have honed my skills specifically in the areas required for your project. My extensive experience in developing web and enterprise applications using J2EE technologies, as well as a solid background in RESTful API design, make me well-suited for your project. In addition, I’m deeply knowledgeable about data storage and retrieval- a necessary aspect for this project. Among the numerous projects I’ve been involved in includes working on secure mobile backends similar to your specific need. Implementing user authentication and management is a core competency I bring to the table, and I have done extensive work using Spring Security to fulfill these requirements efficiently. Moreover, having worked extensively with MySQL and PostgreSQL in my career, I am confident that I can optimize whichever platform you prefer for your data storage needs. I also possess considerable experience with Docker-Compose and containerized deployment which will be beneficial for spinning up your code smoothly. Besides technical skills, I have developed an inherent knack for spotting bugs and resolving issues during software development which ensured robustness of the product. With my strong algorithmic thinking ability combined with my passion for Java, I believe we can create a secure Spring Boot backend that would power an exemplar