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Khazar Mammadov

@khazarmammadov

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Java Developer building scalable REST APIs and microservices with Spring, databases, and cloud integrations.

Azerbaijan

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What I'm looking for

I want to build secure, high-performance Java/Spring services—REST APIs and microservices—with strong database practices and cloud integrations. I’m looking for a team that values clean code, ownership, and continuous improvement.

I’m a Java developer with over 2 years of experience designing, developing, and testing robust software solutions using Java and modern frameworks. I focus on clean, maintainable code and reliable, scalable application delivery.

I build RESTful APIs and backend services with Spring Framework, including Spring Boot, Spring Data JPA, Hibernate, and Spring Security. I’ve worked across microservices, implementing secure integrations and production-ready service logic.

My experience includes database development using PostgreSQL and Oracle, along with schema versioning using Liquibase. I’ve also delivered performance improvements through query optimization, and I’ve maintained database views and scheduled jobs to keep systems fast and operational.

On the integration side, I’ve implemented end-to-end identity verification flows using AWS services (Textract and Rekognition), added Redis-based session management, and designed efficient S3 presigned URL upload flows. I enjoy collaborating closely with technical leads and shipping features from MVP to stable delivery.

Experience

Work history, roles, and key accomplishments

Java Developer

Andersen Lab

Sep 2025 - Apr 2026 (7 months)

Developed and maintained 2 microservices (Client MS and FaceRecognition MS) for a mobile banking KYC onboarding pipeline using Java Spring Boot. Integrated AWS Textract and AWS Rekognition for automated ID parsing and selfie-to-document matching, and implemented Redis-based session management and S3 presigned URL uploads to improve reliability on mobile networks.

Java Spring Boot Microservices Redis AWS S3 PostgreSQL Lombok

Software Engineer

Ultra Technologies

Apr 2024 - Aug 2025 (1 year 4 months)

Built and maintained exam management system features in Java Spring, enabling real-time candidate entry/exit tracking and accurate result persistence to Oracle DB. Refactored thread handling by replacing raw thread lists with ExecutorService to improve resource control and reduce the risk of thread leaks, while collaborating to troubleshoot, upgrade, and ship new features.

Java Spring Boot Oracle Database Real Time Tracking Data Processing Reliability Performance Optimization

Oracle PL/SQL Developer

Ferrum Capital

Oct 2023 - Apr 2024 (6 months)

Designed and maintained credit domain database structures using Oracle SQL and PL/SQL to implement loan processing business logic. Improved critical reporting query performance by eliminating unused data, implemented scheduled archive jobs to move historical data to a separate archive DB, and created database views to simplify data access for application and reporting layers.

Oracle SQL Pl SQL Loan Processing Scheduled Jobs Database View Data Archiving Business Logic Implementation