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Hossein Koraei

@hosseinkoraei

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Senior Java/Kotlin Backend Developer with 5+ years of experience in mentoring, microservices, and AP

Iran

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What I'm looking for

Seeking a challenging role that leverages my expertise in microservices, API optimization, and team leadership to drive technical innovation and deliver high-impact solutions.

As a Senior Java/Kotlin Backend Developer with over five years of experience, I specialize in mentoring junior developers, transforming legacy systems into microservices, and optimizing API performance. My expertise spans a wide range of programming languages, frameworks, databases, and DevOps tools, with a strong foundation in Java and Kotlin.

In my current role at Usermost, I have successfully mentored over three junior developers, developed Kotlin-based reporting systems, and refactored monolithic modules into microservices using Kubernetes. Previously, at Tapsell, I led the transformation of an analytics product, reducing API response time by 50%, and introduced reactive programming and centralized log management systems.

I hold a Bachelor's degree in Computer Software Engineering and have a proven track record of delivering high-impact solutions. My technical proficiency includes cloud and microservices architecture, various databases, and monitoring tools, ensuring robust and reliable software performance.

Experience

Work history, roles, and key accomplishments

Current

Senior Java/Kotlin Backend Developer

Current

Usermost

Jan 2024 - Present (1 year 5 months)

Mentored junior developers and transformed legacy systems into microservices. Developed performance dashboards and optimized API performance using Kotlin and PostgreSQL. Implemented unit and integration tests for software reliability.

Java Kotlin PostgreSQL Microservices Kubernetes API Development Unit Testing Integration Testing Mentoring Performance Optimization

Senior Java/Kotlin Backend Developer

Tapsell

Nov 2021 - Dec 2023 (2 years 1 month)

Transformed an analytics product, significantly reducing API response time. Led recruitment and training initiatives while managing project requirements and team schedules. Utilized various databases and implemented centralized log management.

Java Kotlin Spring Boot Database Management Team Leadership Sentry ELK

Java Backend Developer

Medrick (Game Studio)

Oct 2020 - Nov 2021 (1 year 1 month)

Created test plans and evaluated server configurations for a high-volume Java application. Established monitoring dashboards for system health and performance, ensuring robust application management.