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We’re expanding the next round of services at Inboxlogy, and we’re looking for a freelance backend developer to help us build new features on top of our existing application. About Inboxlogy, Inboxlogy helps businesses grow 10X faster by setting up scalable email outreach infrastructure and providing cost-effective deliverability solutions. Our core system is already built — now we’re enhancing it with new modules and advanced functionality. What You’ll Work On You’ll be responsible for backend feature development and system enhancements, including: * Building and enhancing REST APIs using Java + Spring Boot * Designing scalable business logic and service layers * Working closely with the front-end team to support new features * Integrating with MongoDB databases * Handling authentication, authorization, and data security * Improving performance and system reliability * Deploying and managing services in AWS * Maintaining clean version control using GitHub Tech Stack (Must Have) * Java * Spring Boot * React.js (good understanding for API coordination) * MongoDB * AWS * Git / GitHub What We Expect * Strong experience in building production-grade APIs * Ability to understand an existing codebase and extend it * Clean, structured, and maintainable code * Proper documentation and logical code structure * Good communication and clear updates on progress * Ability to work independently and deliver features on time Engagement Type Freelance / feature-level or milestone-based work If you have solid experience in Java + Spring Boot and have worked on scalable web applications before, share your GitHub profile or code samples along with a short note on similar projects you’ve handled.
Project ID: 40188751
44 proposals
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Active 2 mos ago
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44 freelancers are bidding on average ₹26,341 INR for this job

I have 21 years of experince, IIT graduate, Principal Software Engineer, I have extensive experince with springboot , i can deliver your project efficieintly
₹32,000 INR in 7 days
5.6
5.6

Hi I have seen your job description and interested in this project. Please let me know more about it. Best
₹25,000 INR in 7 days
4.3
4.3

Hello there, I reviewed your project Backend Developer – Java + Spring Boot, MongoDB and understood the requirements at a high level. I focus on delivering clear, stable, and maintainable solutions aligned with the actual scope, I can work with Java, JSP, RESTful and follow a clean development process with proper structure and error handling. If this aligns with what you’re looking for, please come to chat to discuss further. Best regards
₹12,500 INR in 7 days
3.8
3.8

Hello Team Inboxlogy, I’d be glad to support Inboxlogy’s next phase by building and enhancing backend features on top of your existing system. I have hands-on experience extending production Java applications and am comfortable jumping into established codebases. How I can help ✅ Build and enhance REST APIs using Java + Spring Boot ✅ Design scalable service and business logic layers ✅ Integrate and optimize MongoDB data models ✅ Implement authentication, authorization, and data security ✅ Collaborate closely with frontend teams (React API coordination) ✅ Improve performance, reliability, and error handling ✅ Deploy and manage services on AWS ✅ Maintain clean workflows using Git/GitHub Relevant skills ✅ Java, Spring Boot, REST APIs ✅ MongoDB ✅ AWS (EC2, basic deployments, environments) ✅ API-first development & clean architecture ✅ Debugging, performance tuning, and feature enhancement I focus on clean, maintainable code, clear documentation, and reliable delivery. I’m comfortable working independently on feature-level or milestone-based tasks and providing regular progress updates. Happy to share code samples or GitHub links and discuss how I can contribute to Inboxlogy’s growth. Best regards, Abhay Kumar
₹25,000 INR in 7 days
3.7
3.7

Hi, I’m a backend developer with 7 years experience in Java + Spring Boot, MongoDB, AWS, and API design. I’ve built scalable, production-grade systems and integrated secure authentication and payment services. I excel at extending existing codebases, writing clean, maintainable code, and collaborating with frontend teams. I work independently, deliver on time, and provide clear documentation. My GitHub showcases relevant projects. Excited to help Inboxlogy enhance its platform with new features and reliable performance.
₹37,000 INR in 7 days
3.1
3.1

Hello,I'll be happy working with you lets discuss your project ,I'm Software Engineer with 4+ years of hands-on experience looking for a job in Web Development I'm using Java, Python/Django, and Low-Code platforms (OutSystems). Experienced in building backend systems, RESTful APIs, and automation solutions across enterprise, freelance, and self-initiated projects in eCommerce, marketing, and social media automation. Strong background in backenddevelopment, workflow automation, and data-driven solutions.
₹35,000 INR in 1 day
3.0
3.0

I am having 18+ years of experience in Java and J2EE along with all the major frameworks like Struts, Spring and Hibernate. Also having 6 months Python development experience using a pycharm tool.
₹25,000 INR in 7 days
2.8
2.8

Hello, I’m Rahul Singh from Team Velora, and we’ve been successfully running for 3+ years with strong backend development expertise. We clearly understand your requirements around Java + Spring Boot APIs, MongoDB, AWS deployment, and extending an existing production system. Our team can deliver clean, scalable backend features efficiently—let’s connect in the chat box to discuss the project in detail.
₹25,000 INR in 7 days
1.8
1.8

Hi, I’m interested in the Backend Developer – Java + Spring Boot, MongoDB role and bring strong experience in designing and building scalable backend systems. I have hands-on expertise in developing RESTful APIs, implementing secure business logic, and working with NoSQL databases to support high-performance applications. I am a full-stack developer with 5+ years of experience, with deep experience in Java, Spring Boot, REST APIs, and MongoDB. I’ve worked on microservices-based architectures, data modeling, performance optimization, and secure integrations with frontend and third-party systems. I focus on clean, maintainable code and reliable backend workflows. I have collaborated closely with frontend teams, QA, and product stakeholders to deliver stable and scalable solutions. I would be glad to contribute my backend expertise to your team and help build robust, future-ready applications. Regards, Kishan Prasad
₹25,000 INR in 7 days
2.3
2.3

I am results-driven Software Engineer with over nine years of experience in backend development, API design, and cloud architecture. My expertise in Java, Spring Boot,Spring Micorservices and AWS has enabled me to deliver robust, scalable solutions that meet and exceed client expectations. Highlights of my work include scaling a Digital Hospitality Platform to £1M+ in monthly transactions, integrating payment gateways like Adyen for global operations, and optimizing backend systems for 99.9% uptime. I am confident my skills in building efficient, high-performance systems align with your project’s requirements. I am committed to delivering excellence and would be thrilled to contribute to the success of your project. Let’s connect to discuss your needs further. Looking forward to collaborating!
₹25,000 INR in 7 days
0.3
0.3

Hello Inboxlogy Team, I’m a backend developer specializing in Java and Spring Boot, with experience building and extending production-grade APIs for scalable web applications. Your goal of enhancing an existing system with new modules fits perfectly with my background. How I can contribute: Backend Development Build and enhance REST APIs using Java + Spring Boot Design clean, scalable service and business logic layers Extend and refactor existing codebases with maintainable structure Implement authentication, authorization, and data security System & Database Integrate and optimize MongoDB data models Improve performance, reliability, and API response times Ensure clean error handling and consistent API contracts Collaboration & DevOps Work closely with the React.js frontend team for smooth API coordination Deploy and manage services on AWS Maintain clean version control and feature-based workflows using Git/GitHub Provide clear documentation and regular progress updates
₹25,000 INR in 7 days
0.0
0.0

Hi, I’d be glad to support Inboxlogy’s next phase of backend development. I have solid hands-on experience building production-grade REST APIs using Java + Spring Boot, working with MongoDB, and deploying scalable services on AWS. Relevant experience & approach Designing clean controller–service–repository layers in Spring Boot Extending and refactoring existing codebases with minimal disruption Secure authentication & authorization (JWT, role-based access) Performance tuning and reliability improvements API-first collaboration with React front-end teams Clean GitHub workflows with proper commits and documentation I’m comfortable taking ownership of feature-level or milestone-based work, communicating progress clearly, and delivering maintainable, well-documented code on time. I can share GitHub links and relevant backend project samples upon request. Available to start immediately. — Shailendra!
₹25,000 INR in 7 days
0.0
0.0

Hello, I have solid experience developing backend systems using Java Spring Boot, including REST APIs, database integration, authentication, and scalable service architecture. I can contribute efficiently with clean, maintainable code and reliable performance. Ready to discuss the scope and start promptly. Regards, Bharti M
₹35,000 INR in 7 days
0.0
0.0

Java Developer with 2 years of experience in Core Java, Java 8+, Spring Boot, REST APIs, MySQL, Data JPA and Microservices development. Expertise in Microservices, API development, database design and application support.
₹25,000 INR in 11 days
0.0
0.0

Hi.I can help you extend and enhance your existing backend with clean, production-ready features. I have strong experience building REST APIs with Java and Spring Boot, working with MongoDB, and deploying services on AWS. I’m comfortable jumping into an existing codebase, collaborating with frontend teams, and delivering well-structured, maintainable code. I focus on performance, security, and clear documentation so new features scale smoothly. I’m happy to share relevant GitHub work and discuss similar systems I’ve built.
₹30,000 INR in 10 days
0.0
0.0

I understand your requirement for a freelance backend developer to extend your existing Inboxlogy platform with new Java and Spring Boot–based features.I deliver clean, reliable backend systems, including production-grade REST APIs, MongoDB integrations, secure authentication, and AWS deployments, and can share relevant code samples.I can start immediately and work independently while collaborating closely with your front-end team.I’d be glad to discuss your roadmap, priorities, and next steps further.
₹25,000 INR in 5 days
0.0
0.0

Hello I am interested on milestone/ feature-level . Have been working with Java, Spring, RDBMS And MongoDB Atlas or Key value databases since long. You can Check my profile linked in Thanks
₹25,000 INR in 7 days
0.0
0.0

"I am an expert Java Spring Boot developer with experience in building scalable systems, like our Health Lab Management System currently scaling across India. I specialize in REST APIs, MongoDB, and AWS deployment. I can understand your existing codebase and deliver the new backend features within 7-10 days, aiming for a 6-day turnaround. I ensure clean, documented code and seamless GitHub collaboration. I am ready to start immediately on a milestone basis."
₹25,000 INR in 7 days
0.0
0.0

Hey there, I am a Software engineer with over 3 years of experience building and scaling production-grade web applications. I can help Inboxlogy extend its existing system by developing robust Spring Boot REST APIs, integrating MongoDB, handling security, and deploying reliable services on AWS. My expertise includes Java, Spring Boot, MongoDB, AWS, GitHub workflows, and close API coordination with React frontends. With my experience, I’m sure I can finish assigned features efficiently while ensuring clean, maintainable, and well-documented code. Feel free to check my profile and contact me for more details. Regards,
₹15,000 INR in 7 days
0.0
0.0

I am experienced backend developer with java programming and technologies like servlet, jsp and spring boot.
₹25,000 INR in 7 days
0.0
0.0

Pune, India
Member since Jan 28, 2026
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