Open to opportunities

Sajjad Serajzadeh

@sajjadserajzadeh

Message

Backend developer with 7+ years building scalable Java microservices and streaming platforms for 1M+ daily users.

Armenia

Message

What I'm looking for

I’m looking for a Backend Developer role where I can design Java/Spring microservices, optimize streaming/REST systems at scale, and collaborate with AWS/CI/CD teams to deliver reliable, high-performance services.

I profile as a Backend Developer focused on building scalable enterprise systems and streaming platforms with Java, Spring Boot, and microservices. I’ve served 1M+ daily users by designing high-performance REST APIs and optimizing end-to-end workflows.

In streaming work, I improved scalability and reliability by optimizing HLS, MPEG-DASH, and DRM processes and collaborating across teams to deliver microservices deployed to cloud infrastructure. I also built secure enterprise insurance backend services using Spring Security, integrating policy/claims/customer modules with PostgreSQL and Redis caching, and strengthened CI/CD with Jenkins and Docker.

I’ve further expanded into IoT and real-time telemetry by implementing microservices for device monitoring and analytics, improving system performance and reliability by 30%. I bring strong fundamentals across JPA/Hibernate, concurrency, event-driven architecture, and AWS-focused DevOps practices.

Experience

Work history, roles, and key accomplishments

Java Backend Developer

Fanap Soft

Feb 2022 - Mar 2023 (1 year 1 month)

Developed a scalable IoT backend using microservices to handle real-time telemetry for device monitoring and analytics. Improved system performance and reliability by 30% and collaborated with DevOps on AWS infrastructure and CI/CD pipelines.

Java Microservices Architecture Telemetry IoT Backend Development AWS CI CD Performance Optimization