Mohammed Aafaq H.
Full Stack Engineer @Paymentus
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WORK HISTORY
Full Stack Engineer @Paymentus
Toronto, ON, CA
Implemented asynchronous communication between the services using JMS message brokers (ActiveMQ). Developed high-performance RESTful and GraphQL APIs for account management, transactions, and payment processing with robust validation and error handling. Designed and Developed RESTful APIs using Spring Boot REST and Swagger for API Documentation. Designed and implemented scalable microservices architecture using Spring Boot and Spring Cloud, enabling independent deployment and fault isolation across services. Built responsive and dynamic front-end using React.js with Redux Toolkit, improving user engagement and reducing page load times significantly. Implemented secure authentication and authorization using OAuth2, JWT, and Spring Security aligned with banking compliance standards. Integrated Apache Kafka for real-time event-driven transaction processing and asynchronous communication between microservices. Optimized database performance using PostgreSQL with indexing, query tuning, and connection pooling to handle high transaction volumes. Containerized applications using Docker and orchestrated deployments with Kubernetes (AKS/EKS) ensuring high availability and scalability.Developed CI/CD pipelines using Jenkins and GitHub Actions enabling automated build, test, and deployment processes. Implemented centralized logging using ELK stack (ElasticSearch, Logstash, Kibana) for monitoring and debugging production issues. Used Prometheus and Grafana for real-time system monitoring, alerting, and performance visualization. Collaborated with cross-functional teams including QA, DevOps, and product owners in Agile Scrum environment. Conducted code reviews and enforced coding standards improving code quality and maintainability. Ensured data security, encryption, and compliance with financial regulations (PCI DSS, GDPR).
EDUCATION
Osmania University, Hyderabad
Bachelor's degree, Computer Science
ABOUT MOHAMMED AAFAQ H.
Java Full Stack Developer with 5+ years of experience building scalable enterprise applications across banking, healthcare, and SaaS domains. Strong background in Java 17/21, Spring Boot microservices, React, Angular, Kafka, PostgreSQL, and cloud-native development on AWS and Azure. Built and optimized high-performance REST and GraphQL APIs, event-driven systems, and distributed microservices handling secure transactions, real-time processing, and large-scale integrations. Experienced with Spring Cloud, Docker, Kubernetes, CI/CD pipelines, and production monitoring using ELK, Prometheus, and Grafana. Worked on customer-facing platforms, backend services, and modern frontend applications with a focus on performance, scalability, security, and clean architecture. Hands-on experience implementing OAuth2, JWT, Spring Security, Kafka-based messaging, and cloud deployments in Agile environments. Core Skills: Java • Spring Boot • Spring Cloud • Microservices • React.js • Angular • Kafka • RabbitMQ • REST APIs • GraphQL • PostgreSQL • MongoDB • Docker • Kubernetes • AWS • Azure • Jenkins • GitHub Actions • CI/CD • Hibernate • JPA • OAuth2 • JWT • ELK Stack
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