03/21/2026 updated
100 % available
Java Developer - Payment Systems & Microservices
Delhi, India
Worldwide
M.Sc in Computer ScienceAbout me
Backend Developer with 3.5+ years of experience building enterprise systems and AI-powered applications using Java, Jersey (JAX-RS), RabbitMQ, and GenAI technologies.
Java (Programming Language)Application Programming Interfaces (APIs)Agile MethodologyArtificial IntelligenceAmazon Web ServicesAmazon Elastic Compute CloudAmazon S3Data AnalysisApache TomcatMicrosoft AzureFinancial InstitutionCloud ComputingDatabasesContinuous IntegrationDevOps
Java Development & Microservices
Advanced Java programming with Spring Boot framework for building scalable microservices and RESTful APIs with 3.5+ years of experience
Payment Systems & Financial APIs
Specialized development of payment processing systems, loan processing, EMI management, and transaction handling for financial institutions
Cloud & Database Technologies
Expertise in AWS cloud services, MySQL database optimization, and distributed systems architecture with RabbitMQ
AI & Machine Learning Integration
Implementation of Azure OpenAI GPT solutions, conversational bots, RAG-based document search with vector embeddings
Database Management & Analytics
MySQL, HikariCP, H2, SQL optimization, query tuning, and database introspection dashboard design
Distributed Systems Architecture
RabbitMQ message queuing, async processing, rate limiting, and multi-tenant system design
DevOps & Cloud Infrastructure
AWS EC2, S3, SES, Lambda, RDS, Tomcat deployment, Git version control, CI/CD, and Agile methodologies
API Development & Integration
RESTful API design, Jersey JAX-RS, Maven build management, and WhatsApp API integration
Advanced Java programming with Spring Boot framework for building scalable microservices and RESTful APIs with 3.5+ years of experience
Payment Systems & Financial APIs
Specialized development of payment processing systems, loan processing, EMI management, and transaction handling for financial institutions
Cloud & Database Technologies
Expertise in AWS cloud services, MySQL database optimization, and distributed systems architecture with RabbitMQ
AI & Machine Learning Integration
Implementation of Azure OpenAI GPT solutions, conversational bots, RAG-based document search with vector embeddings
Database Management & Analytics
MySQL, HikariCP, H2, SQL optimization, query tuning, and database introspection dashboard design
Distributed Systems Architecture
RabbitMQ message queuing, async processing, rate limiting, and multi-tenant system design
DevOps & Cloud Infrastructure
AWS EC2, S3, SES, Lambda, RDS, Tomcat deployment, Git version control, CI/CD, and Agile methodologies
API Development & Integration
RESTful API design, Jersey JAX-RS, Maven build management, and WhatsApp API integration
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
EnglishFluent
Project history
Developed 40+ REST APIs for loan processing, EMI management, payment workflows, and transaction handling. Architected RabbitMQ-backed multi-tenant message queuing system. Delivered 90+ production applications for financial and automotive clients. Built AI-powered conversational bots using Azure OpenAI GPT.