Open to opportunities

Vahan User

@vahanuser

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I build scalable Java backend systems for SaaS and core banking platforms.

Armenia

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What I'm looking for

I'm looking to build reliable, high-performance backend systems in distributed environments, working on Java, Spring Boot, microservices, AWS, event-driven architecture, and cloud-native services.

I've built scalable Java backend services for QLess, a real-time SaaS queue management platform serving government, healthcare, retail, and education customers.

At QLess, I developed Spring Boot services with PostgreSQL and Redis, designed REST APIs for microservices and enterprise platforms, and implemented asynchronous event processing with AWS SQS, SNS, and Kinesis. I also built AWS Glue reporting pipelines, Cognito-based enterprise SSO, CloudWatch monitoring, and Datadog and Grafana dashboards for faster incident response.

Previously at Energize Global Services, I developed software for core banking and data management systems for enterprise clients. I optimized REST APIs, distributed services, PostgreSQL and MongoDB data flows, and managed schema migrations with Liquibase and Flyway.

I'm focused on reliable, maintainable, high-performance distributed systems, supported by automated testing, Kubernetes deployments, GitOps workflows, and collaborative engineering practices.

Experience

Work history, roles, and key accomplishments

Java Software Engineer

QLess

Jul 2025 - Aug 2026 (1 year 1 month)

Developed and maintained scalable backend services for a SaaS queue management platform, designing REST APIs and implementing event-driven processing with AWS services. Automated Kubernetes deployments using GitLab CI/CD and ArgoCD, and built monitoring dashboards with Datadog and Grafana.

Java Spring Boot PostgreSQL Redis AWS Kinesis AWS RDS DynamoDB S3 Lambda API Gateway Glue Athena Cognito Cloudwatch Junit Mockito Datadog Grafana Kubernetes Gitlab CI ArgoCD

Java Software Engineer

Energize Global Services

Oct 2021 - Jul 2025 (3 years 9 months)

Developed and optimized backend services for core banking and data management systems, designing high-performance REST APIs and managing database schemas with PostgreSQL and MongoDB. Implemented unit and integration tests and participated in code reviews to ensure code quality.