Java Backend Developer with Spring & Lambda Expertise

@rohitpatidar001

Hello, I have 11+ years of experience in Java backend development, specializing in Spring Boot, Spring Framework, REST APIs, microservices, and AWS. I have built scalable backend applications, integrated third-party APIs, and worked with MySQL/PostgreSQL in enterprise environments. I also have experience developing and deploying AWS Lambda functions, designing secure backend services, and implementing clean, maintainable architectures following best practices. My expertise includes: Java, Spring Boot, Spring MVC REST API development & integration AWS Lambda Spring Security & JWT Authentication Hibernate/JPA MySQL & PostgreSQL Maven, Git, Docker I write clean, well-documented code and provide regular progress updates throughout development. I can quickly understand existing systems or build backend services from scratch. I'm available to start immediately and would be happy to discuss your backend requirements in detail. Looking forward to working with you. Best regards, Rohit

@ashokdzpxq

Hi , I would like to apply for the opportunity to contribute to your project. With 18+ years of experience as a Java Spring Developer, I bring a proven track record of designing, developing, and architecting scalable solutions for diverse industries, including fintech, e-commerce, and enterprise software. Technical Expertise ✅Spring Ecosystem: Spring Boot, Spring Batch, Spring Cloud, Spring Security, Spring AOP, Spring MVC, JSP, Thymeleaf. ✅AI : RAG , Claude , Codex ✅Microservices & APIs: Microservices architecture, RESTful APIs. ✅Messaging & Event-Driven Systems: Apache Kafka, WebSocket, STOMP, Socket io ✅Cloud Integration: AWS (ECS Fargate, S3, EC2, ALB, RDS). ✅Database Design: SQL (MySQL, Oracle, Yugabyte, PostgreSQL, MS SQL Server) ✅DevOps & Containers: CI/CD pipelines, Jenkins, Docker, Podman, Kubernetes ✅Search & Caching: Elasticsearch, Redis, Terracotta Caching ✅System Integration & Legacy Modernization: Seamlessly integrate modern applications with legacy systems ✅Frameworks & Tools: JHipster, Keycloak, Flowable, JBPM, Flyway, MapStruct,JavaFX ✅CMS Solutions: Documentum, Alfresco ✅XML & Web Services: SOAP, RESTful services ✅Reporting Tools: Crystal Reports, Jasper Reports, BIRT ✅Testing Framework/Tools: Junit5,Selenium,JMeter

@mahads31

As a seasoned and adaptable Java developer, I understand that a solid backend is the backbone of any successful software project. With a strong command of essential technologies such as Spring and Lambda, I am in a prime position to take your project to the next level. Throughout my fruitful career, I have amplified growth for various businesses by creating highly efficient and scalable backend systems customized to their unique requirements. By partnering with me, you not only gain technical expertise but also someone committed to long-term business growth. My proficiency extends beyond Java - I am also skilled in PHP/Laravel, JavaScript, React.js, Node.js, Python, HTML/CSS and more - enabling me to transcend silos and provide comprehensive solutions for all your technical necessities. From API integrations to CMS management, eCommerce needs or AI automations; my toolkit has got you covered. So let's build technologies that grow with your business. Max character count: 889

@Abuzar00

As a java developer with 5+ years of full-stack experience, specifically 3.5 Years in enterprise fintech at i2c Inc., I am well-versed in the backend processes that suit your project requirements. I have built payment microservices, REST APIs, and high-throughput fintech architecture - all of which would be deployed in this project. Additionally, as a proficient Java Spring developer, my skills align impeccably with the technical specifications you've outlined. Moreover, I have a deep understanding of Amazon Lambda functions and can utilize them effectively to enhance the performance of your backend system as required for the project. Over the years, my ability to design scalable databases and write optimal queries has proven to be essential when working on large scale projects similar to yours. Subsequently, I am confident in my capacity to manage your MySQL or any other database utilized for this project. Throughout my career, I have consistently delivered clean & production-ready solutions, assuring you'll receive a deliverable that meets or exceeds your expectations. Moving forward on this project, expect a reliable performer with zero tolerance for late submissions and rework. The positive feedbacks I've received from clients across diverse geographies reflect their satisfaction with my work approach and its quality. Choose me - reliable expertise we both can depend on!

@anshumanvermaUK

Hi, I have experience with Java, Spring Boot, AWS Lambda, REST APIs, PostgreSQL, and backend application development. My recent work includes enterprise backend services, microservices, authentication systems, API integrations, and production bug fixing with clean, maintainable code. I can quickly contribute to your backend development and deliver scalable, high-quality solutions. Thanks, Anshuman

@abhayk49

Hi, I’m a Java Backend Developer with 5+ years of experience in Spring Boot, REST APIs, Microservices, and AWS Lambda. ✅ My Expertise ✅ Java & Spring Boot ✅ REST API Development ✅ Microservices Architecture ✅ Spring Security & JWT ✅ MySQL, PostgreSQL & MongoDB ✅ Maven, Git & Docker I have worked on enterprise backend applications, API integrations, cloud-based services, and scalable microservices. I can help develop new features, fix issues, optimize performance, and deliver clean, maintainable code. I'm available to start immediately and would be happy to discuss your requirements. Best regards, Abhay

@borse1012

Hello, I'd be happy to assist with your Java backend development needs. I have 14 years of experience building enterprise applications using Java, Spring Boot, Spring MVC, Spring Security, REST APIs, JPA/Hibernate, Microservices, and AWS. I also have hands-on experience developing and deploying **AWS Lambda** functions for serverless processing, API integrations, and event-driven workflows. My expertise includes: * Java 17/21 and Spring Boot * RESTful API development and third-party integrations * AWS Lambda, API Gateway, S3, SNS/SQS, and CloudWatch * PostgreSQL, MySQL, Redis, and JPA/Hibernate * Docker, Kubernetes, CI/CD, and Git * Secure authentication with JWT and OAuth2 * Unit and integration testing with JUnit and Mockito I write clean, maintainable, and well-documented code while following best practices for performance, scalability, and security. I'm comfortable working independently or collaborating with your existing team and can start immediately. I'd be happy to discuss your project requirements and how I can contribute to its success.

@jaroslavcaprata

A backend built with Spring Boot and AWS Lambda needs more than working APIs—it should be modular, maintainable, and easy to deploy while keeping performance and scalability in mind. Before making changes, I'd review the existing architecture to understand how the Spring services and Lambda functions interact and identify any bottlenecks or areas for improvement. I can help develop and enhance backend functionality, implement REST APIs, optimize business logic, integrate databases or third-party services, and improve deployment workflows where needed. My focus is on writing clean, well-structured code that is easy to test and extend as the project evolves. If the project already has an existing codebase, I can quickly get up to speed, follow your coding standards, and work through Git-based development with clear communication throughout the engagement. Could you share a bit more about the current backend architecture? Specifically, are you using Spring Boot alongside AWS Lambda for specific event-driven tasks, or is the application built entirely around serverless services?

@nouman27

Hi, I would be happy to help with your Java backend project. I have 18+ years of experience in Java development, with strong expertise in Spring Boot, REST APIs, Microservices, AWS Lambda, and cloud-native application development. I have designed and built scalable backend systems, integrated third-party services, optimized application performance, and implemented secure authentication and authorization. My expertise includes: * Java 11/17/21 * Spring Boot & Spring Security * RESTful API development * AWS Lambda and serverless applications * Microservices architecture * PostgreSQL, MySQL, and MongoDB * Docker, Kubernetes, and CI/CD * Kafka and asynchronous messaging I focus on writing clean, maintainable, and production-ready code while ensuring performance, security, and scalability. I would be glad to discuss your requirements in detail and can start immediately. Looking forward to hearing from you. Best regards, Nouman Khalid

@ashinnd84

Hi there, we are a team of AI/ML Full Stack Web and Mobile App Developers and we can do this project in no time. Thanks Ashish Kumar.

@dushyant317

Hi, we have strong expertise in Java, Spring Boot, AWS Lambda, REST APIs, and scalable backend development, and can deliver secure, high-performance backend solutions with clean, maintainable code.

@deepaksinghkirar

Hi - I am solution architect and a full stack developer. I have extensive working experience on Java and related frameworks/technologies. I can work with you on this. Thanks

@AcuteTech06

Hello, I am excited to apply for your Java Backend Developer position. - I have extensive experience with Java, Spring, and AWS Lambda in similar projects. - My plan includes requirements gathering, architecture design, development, testing, and deployment. - I utilize tools like IntelliJ, Git, and AWS for efficient development. - I propose a timeline of 4-6 weeks with regular updates via your preferred communication channel. Choose me for my commitment to quality and timely delivery. What specific features do you want to prioritize? Do you have a preferred communication tool? Regards, Acute Tech.

@shayankhan333

The project description is pretty bare, which usually means the real scope is in your head and not on the page yet. That's fine, I've picked up plenty of Spring Boot + Lambda projects where the first step is a quick scoping call. I've built several Java services on AWS Lambda with Spring Cloud Function, keeping cold starts low by trimming the dependency tree and using SnapStart where the runtime supports it. One thing worth flagging: Spring's DI container adds noticeable cold-start latency on Lambda, so I'll profile startup and strip unnecessary auto-configurations early. 1) Is this a new service or refactoring an existing Spring app into Lambda functions? Happy to talk details in chat. Shayan

@UmairBuildsAI

Hey, I can help develop and optimize your Java backend services using Spring Boot, AWS Lambda, and scalable backend architecture. You can review my work here: https://www.freelancer.pk/u/UmairBuildsAI I have experience building backend systems, REST APIs, automation workflows, and full-stack applications using modern technologies. I can help with Spring Boot development, API design, database integration, backend logic, AWS Lambda-based serverless functions, and improving existing backend performance and reliability. I focus on writing clean, maintainable code with proper architecture, error handling, security practices, and deployment-ready solutions. I can quickly understand your existing setup and deliver backend features or improvements according to your requirements. One quick question, are you looking to build a new Spring Boot backend from scratch or need improvements and support on an existing Java application? Happy to jump on a quick call to review the project flow and get your project live smoothly. Best Regards, Umair

@bhargav922002

Hello, I'm bharghav, bringing a decade of experience in developing robust Java solutions. My expertise lies in crafting efficient backend systems, perfectly aligning with the demands of this project. I understand you're seeking a Java backend developer proficient in Spring and Lambda. My approach involves leveraging these technologies to build a scalable and high-performing solution, ensuring all your requirements for a modern backend are met with precision. Please initiate a chat so we can discuss the specifics and refine the project scope further. Best regards,

@nehan247

Hello, I have 13+ years of experience in software development, specializing in Java, Spring Boot, Microservices, REST APIs, Kafka,Python, AWS, data Engineer and Kubernetes (EKS). I have designed and developed scalable enterprise applications for high-traffic environments, focusing on performance, security, and maintainability. Why choose me? ✔ 13+ years of enterprise software development experience ✔ Expert in Java, Spring Boot, Spring Security, Hibernate, JPA ✔ Strong experience with Microservices architecture and REST APIs ✔ AWS Cloud, Docker, Kubernetes (EKS) ✔ Kafka, RabbitMQ, and event-driven architecture ✔ SQL (MySQL, PostgreSQL, SQL Server) and NoSQL databases, databricks ✔ Angular, React, and WordPress development ✔ Clean, maintainable, and well-documented code ✔ Timely delivery with regular progress updates I can help you build or improve your application by delivering production-ready, scalable, and secure solutions. I believe in understanding business requirements first and then implementing the most efficient technical solution. I would be happy to discuss your project requirements and suggest the best approach. Looking forward to working with you. Best Regards, Neha Singh Senior Java Developer | Spring Boot | Microservices | AWS | Kafka

@rathinarajak

Hi, I have 8.5+ years of experience in Java, Spring Boot, REST APIs, and AWS Lambda. I've built scalable backend applications, optimized existing systems, and integrated enterprise services. I can quickly understand your requirements and deliver clean, maintainable code within the agreed timeline. Looking forward to discussing your project. Reason for 10 daydue is due to generic requirement , once that is good enough can deliver as early as possible

@bhagwatij

Hello there, I am having the expertise and experience for the job needs at high level. If you would like to talk this further lets connect. I have not been active on freelancer but have a great track record on Upwork if you would like to look at it. Thanks, bhagawathi