Safiullah Rayeen

Senior Java Developer

https://talent.gravityer.com/safiullah-rayeen

Senior Java Developer with 3+ years in Spring Boot & Microservices

Aufait Technologies

Key Strengths

Strong proficiency in Java, Spring Boot, and Microservices architecture, directly aligning with the Senior Java Developer role.
Extensive experience with Spring Security, JWT, and RBAC for robust authentication and authorization, crucial for secure enterprise applications.
Hands-on experience with event-driven architectures using Apache Kafka for asynchronous processing and real-time updates.
Proficient in cloud deployments on AWS (EC2, RDS, S3, CloudWatch) and containerization with Docker, demonstrating strong DevOps capabilities.
Experience with CI/CD pipelines (Git, Maven, Jenkins, GitHub Actions) ensures efficient development and deployment workflows.
Solid understanding of database management with MySQL and ORM using Hibernate/JPA.
Demonstrated ability to develop and maintain RESTful APIs, including conflict resolution and robust error handling.
Experience with front-end technologies like Angular, indicating a full-stack awareness, beneficial for integration and understanding system end-to-end.

Cultural & Operational Fit

Cultural Fit Analysis

The candidate's experience in a team of 15 on a complex 'Healthcare Appointment Booking Platform' project, utilizing Agile Scrum, demonstrates an ability to work effectively in structured, collaborative environments. The breadth of technologies and responsibilities across multiple services (User, Appointment, Medical Records, Notification, Inventory, Infrastructure) indicates adaptability and a willingness to tackle diverse technical challenges. The role alignment with a 'Senior Java Developer' is strong, suggesting a good cultural fit for a team seeking a technically capable and collaborative individual.

Soft Skills & Operational Fit

The candidate's project descriptions highlight collaboration with QA/front-end teams, adherence to Agile/Scrum methodologies, and involvement in sprint planning, indicating good team collaboration and operational fit. The focus on reliable message delivery, monitoring, and disaster recovery suggests a proactive and responsible approach to system stability.

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Projects

Healthcare Appointment Booking Platform

August 1, 2022 – April 1, 2026

User & Doctor Service – Implemented JWT-based authentication and role-based access control (Admin, Doctor, Patient) using Spring Security. Developed Spring Boot REST APIs for user registration, doctor profile management, specialization mapping, and availability scheduling. Added password encryption and two-factor authentication to improve application security. Appointment Service – Developed appointment scheduling, rescheduling, and cancellation APIs using Spring Boot with conflict-resolution logic to prevent overlapping bookings. Integrated Apache Kafka for asynchronous notifications and real-time appointment updates. Medical Records Service –Developed Angular front-end modules integrated with Spring Boot APIs to manage prescriptions, lab reports, and patient history using RBAC, with audit logging and AWS S3-based secure storage and versioning of medical records. Notification Service – Implemented asynchronous, event-driven notification workflows using Apache Kafka for reminders and status updates. Designed configurable notification templates with multilingual support to ensure reliable message delivery. Added retry and backup queues to handle failed messages, improved the message process to make it faster and handle more notifications smoothly, and added simple monitoring tools to track notification status in real time. Inventory & Pharmacy Service – Developed Spring Boot REST APIs for medicine availability, ordering, and stock management. Implemented vendor integration and low-stock alert mechanisms to ensure efficient inventory control. Added automatic stock updates to keep inventory accurate, improved order handling to make the process faster, and created easy-to-read logs to track medicine movements and system issues. Infrastructure & Deployment -Deployed Spring Boot microservices on AWS (EC2, RDS, S3, CloudWatch) and containerized applications using Docker. Configured auto-scaling, load balancing, monitoring, and disaster recovery strategies to ensure high availability and reliability. Testing & Monitoring – Performed API testing with Postman, JUnit, Mockito, implemented exception handling and logging, and monitored health using Spring Boot Admin. Collaboration & Delivery – Worked in Agile for sprint planning, collaborated with QA/front-end teams for integration, and maintained CI/CD pipelines using Git, Maven, and Jenkins.

Key Strengths

Strong proficiency in Java, Spring Boot, and Microservices architecture, directly aligning with the Senior Java Developer role.
Extensive experience with Spring Security, JWT, and RBAC for robust authentication and authorization, crucial for secure enterprise applications.
Hands-on experience with event-driven architectures using Apache Kafka for asynchronous processing and real-time updates.
Proficient in cloud deployments on AWS (EC2, RDS, S3, CloudWatch) and containerization with Docker, demonstrating strong DevOps capabilities.
Experience with CI/CD pipelines (Git, Maven, Jenkins, GitHub Actions) ensures efficient development and deployment workflows.
Solid understanding of database management with MySQL and ORM using Hibernate/JPA.
Demonstrated ability to develop and maintain RESTful APIs, including conflict resolution and robust error handling.
Experience with front-end technologies like Angular, indicating a full-stack awareness, beneficial for integration and understanding system end-to-end.

Cultural & Operational Fit

Cultural Fit Analysis

Soft Skills & Operational Fit

Safiullah Rayeen

Key Strengths

Cultural & Operational Fit

About

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Skills

Education

Experience

Projects

Key Strengths

Cultural & Operational Fit