More than 15 Years of IT experience in development using various technologies like Java,Spring Boot, Microservices, Node and Grails.
Hands-on experience in Spring(IOC, MVC, Data-JPA) and Hibernate.
Good Knowledge in Service-oriented architecture(SOA), design patterns, design principles, and software lifecycle methodologies.
• Worked on AWS services (EC2, S3, RDS, Lambda, SQS ), Netflix-OSS (Hystrix, Zuul, andFeignClient), and Docker.
• Ability to adapt quickly to new environments, learn new technologies and deliver the best quality of work. • Working experience in Continuous integration tools like Jenkins.
• firm believer and practitioner of Agile methodologies.
• Working Experience in Kubernetes, Kafka SQS, and RabbitMQ.
• Strong focus on technology and obsessed with keeping things simple.
Grails
Gradle
Java
RESTful Architecture
Spring Framework
SQL
Apache Maven
Microservice
Hibernate
AWS Lambda
Spring Boot
Node.js
RESTful API
Tanuj N.
Chandigarh, India
$10/hr
4.9
8 jobs
I have 7 years of hands-on experience efficiently coding websites and applications using modern Springboot, ReactJs, Angular JS, HTML, CSS, JavaScript,React Components, Event Handling, React Hooks, Routers, Conditional Rendering, SPA, Unit Testing, REST services, Grails and Groovy, Microservices, JSON structures Agile execution Process, Java and backend Development as well.
Grails
HTML5
Bootstrap
CSS 3
JavaScript
Tailwind CSS
React
HTML
AngularJS
Java
Spring Boot
Niravdas K.
Ahmedabad, India
$28/hr
4.9
18 jobs
✅ 8+ Years of Java Development Experience
⚡ Full-Cycle Backend Development & Architecture
⚡ AI-Powered Development for Faster Delivery & Better Code Quality
👀 Click Invite or Hire for Scalable Java Backend Solutions
Looking for a Java Developer who can build scalable backend systems, SaaS platforms, enterprise applications, and cloud-native solutions designed for long-term growth?
For 8+ years, I have helped startups, SaaS companies, fintech businesses, AdTech platforms, and enterprise organizations build secure, scalable, and high-performance software using Java, Spring Boot, PostgreSQL, MySQL, Kafka, GraphQL, AWS, Docker, Kubernetes, and modern cloud technologies.
From backend architecture and microservices development to legacy application modernization, API integrations, troubleshooting, cloud deployments, and AI-assisted engineering, I deliver production-ready solutions built to scale.
👉 WHAT YOU GET:
✔️ Java Backend Development & Software Architecture
✔️ Spring Boot Applications & Microservices
✔️ REST APIs, GraphQL APIs & Integrations
✔️ Cloud-Native Applications using AWS
✔️ AI-Assisted Development & Automation
✔️ Legacy System Modernization
✔️ Long-Term Support, Maintenance & Optimization
🏆 KEY ACHIEVEMENTS:
✔️ 8+ years building Java, Spring Boot, and enterprise backend applications
✔️ Built scalable SaaS platforms, fintech applications, AdTech systems, and enterprise software
✔️ Maintained and enhanced 15+ production microservices
✔️ Contributed to Adstrome, TrustArc, Acquia DAM, and Digi-Docket
✔️ Designed secure APIs, event-driven systems, and scalable architectures
✔️ Improved application performance through optimization and modernization
⚙️ CORE EXPERTISE:
✔️ Java, Core Java, Java EE, Spring Boot, Spring MVC, Spring Security
✔️ Hibernate, JPA, JDBC, MyBatis, ORM Frameworks, REST APIs, GraphQL APIs
✔️ Microservices Architecture, Apache Kafka, Event-Driven Systems
✔️ PostgreSQL, MySQL, Snowflake, Query Optimization
✔️ AWS, Docker, Kubernetes, Jenkins, Maven, Gradle, Git, GitHub, Bitbucket, Version Control Systems
✔️ Authentication, Authorization, RBAC, Multi-Tenant SaaS
✔️ ZK Framework & Enterprise Web Application Development
🛠 DEVELOPMENT & MAINTENANCE:
✔️ Web Application Development & Enterprise Software Development
✔️ Spring MVC & ZK Framework Application Development
✔️ Legacy Application Maintenance, Modernization & Application Upgrades
✔️ Feature Development & Application Enhancements
✔️ Bug Fixing, Root Cause Analysis & Production Support
✔️ Performance Bottleneck Analysis & Optimization
✔️ Memory Leak Detection & Resolution
✔️ Security Vulnerability & CVE Remediation
✔️ Third-Party API Integration & Business Workflow Automation
✔️ Performance Optimization & Scalability Improvements
☁️ CLOUD & DEVOPS:
✔️ AWS Cloud Services, Docker Containerization & Containerized Application Deployment
✔️ Kubernetes Container Orchestration for Scalable Cloud Infrastructure
✔️ Linux-Based Server Systems, Linux Server Administration & Linux Server Troubleshooting
✔️ Apache Tomcat Installation, Deployment, Monitoring & Performance Tuning
✔️ CI/CD Pipelines, Jenkins Automation, Git, GitHub, Bitbucket & Version Control Systems
✔️ Web Application Troubleshooting, Production Environment Support & Incident Resolution
🧪 TESTING & QUALITY:
✔️ JUnit, Mockito, Unit Testing & Integration Testing
✔️ Test-Driven Development & Automated Testing
✔️ API Testing, Debugging & Log Analysis
✔️ Root Cause Investigation & Production Stability
✔️ Code Quality Improvements & Maintainable Software Development
✔️ Regression Testing & Application Reliability Improvements
🤖 AI-ENHANCED ENGINEERING:
✔️ AI-Assisted Development & AI-Powered Coding Workflows
✔️ OpenAI API Integration, LLM Workflows & AI Automation
✔️ AI-Assisted Testing, Refactoring & Documentation
✔️ Faster Delivery Through AI-Enhanced Engineering
🏢 INDUSTRY EXPERIENCE:
✔️ SaaS Platforms & Enterprise Applications
✔️ AdTech & Programmatic Advertising
✔️ Fintech & Loan Processing
✔️ Privacy & Compliance Systems
✔️ Digital Asset Management
✔️ Multi-Tenant & White-Label Solutions
🚀 WHY CLIENTS CHOOSE ME:
✔️ 8+ Years of Java Development Experience
✔️ Enterprise SaaS & Microservices Expertise
✔️ Strong Spring Boot & Cloud-Native Skills
✔️ Scalable, Secure & Maintainable Solutions
Whether you need to build a backend platform from scratch, scale an existing SaaS application, maintain a legacy system, resolve performance bottlenecks, remediate security vulnerabilities, implement microservices, modernize enterprise software, deploy applications on Tomcat or Linux-based server systems, integrate AI capabilities, or optimize application performance, I can help.
Looking for a Java Developer, Senior Java Developer, Java Backend Developer, Spring Boot Developer, Java Architect, Backend Engineer, Enterprise Software Developer, API Developer, GraphQL Developer, AWS Developer, Cloud Engineer, Kafka Developer, Software Architect, Backend Architect, or Java Consultant?
Spring Boot
Spring Security
Microservice
Java
Core Java
Hibernate
Spring Framework
Spring MVC
Spring Batch
RESTful API
Jakarta EE
MySQL
Apache Kafka
JUnit
Java Servlet API
JSTL
Thymeleaf
Amazon Web Services
Back-End Development
Web Development
Chetan S.
Bangalore, India
$25/hr
4.9
15 jobs
Over 10 years of experience in developing and maintaining applications on Grails / springboot / spring and related technologies.
Over the last 10 years, I have worked on variety of projects including web sites/Web applications, Enterprise applications, SAAS and Cloud.
My favorite development stack is :
Groovy Grails OR Spring / Springboot /Spring MVC + Hibernate / IntelliJ Idea / Groovy grails tool suite, ReactJs, VueJS, Bootstrap
My core competency lies in '''Object Oriented Designs''' and '''domain modeling'''. I believe that the domain should reflect your business entities and concepts.
Grails
Oracle Database
HTML
Vue.js
JavaScript
PHP
Java
Apache Groovy
jQuery
MongoDB
MySQL
React
Spring Boot
Aagam S.
Surat, India
$23/hr
4.9
5 jobs
Full-Stack Engineer | 2,200+ Upwork Hours | 100% Job Success
I design clean architectures and take full ownership of the code I ship — from database to UI.
I'm a Full-Stack Engineer with over 6 +years of experience building high-performance web applications and complex API networks. With a flawless 100% Job Success Rate on Upwork, I specialize in bridging heavy enterprise backend ecosystems with modern, intelligent automation.
⚡ Core Architecture & Integration Expertise:
● AI & LLM Integration: Embedding OpenAI, Anthropic, or Gemini APIs for secure context retrieval, automated data workflows, and intelligent feature layers.
● Custom API Architecture: Designing secure, high-throughput RESTful and GraphQL API gateways from scratch using Java (Spring Boot) and Node.js/Express.
● Resilient Third-Party Systems: Orchestrating fault-tolerant integrations with webhooks, external CRMs, and payment gateways (Stripe, PayPal) with clean failover handling.
● Real-Time Streams & UI: Leveraging WebSockets for live, low-latency data dashboards built on high-performance Angular and React.js frontends.
🛠️ The Technical Toolkit:
● Backend: Java, Spring Boot, Node.js, Express.js, Groovy Grails, Gradle, WebSockets
● Frontend: Angular, React.js, JavaScript (ES6+), HTML5, CSS3, SASS/LESS, Bootstrap
● Databases & Tools: MySQL, MongoDB, PostgreSQL, Git, Postman, Jira
🔷 The Senior Standard I Bring:
● Logic-UI Separation: I isolate core computations from front-end components, ensuring your platform stays secure, stable, and effortless to scale.
● AI-Native Velocity: I use an optimized, AI-native development workflow to build, test, and audit production-grade code faster than traditional timelines.
● Product Ownership: I proactively review specifications to optimize API costs, eliminate bottlenecks, and ensure clean, rapid delivery.
If you need a hands-on engineer who can take real ownership of your technical build and execute cleanly, let's connect!
Grails
Java
MySQL
HTML
JavaScript
Node.js
CSS
React
HTML5
CSS 3
Software Debugging
Linux
ExpressJS
GraphQL
Websockets
Software Development
Hardik A.
Surat, India
$30/hr
5.0
12 jobs
Backend Software Engineer with 11 years of experience in developing highly scaleable distributed software systems.
Java, Spring Boot, JS, RDBMS, NoSQL, In-Memory Databases - Redis and Aerospike. Cloud platforms - AWS, GCP, Digital Ocean. Apache Kafka.
CI/CD. Test Driven Development. Multithreading. Distributed Transaction management.
CQRS, Event driven architecture.
End to end product ownership.
Spring Boot
Kubernetes
Redis
Spring Framework
Docker
PostgreSQL
MySQL
Java Persistence API
MongoDB
Java
SQL
Apache Kafka
Microsoft Power BI
Google Cloud Platform
Web Application
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