Open to opportunities

Sergei Dzeboev

@sergeidzeboev

Message

I build scalable Java backend systems, integrations, and cloud-native services.

Zimbabwe

Message

What I'm looking for

I'm looking to build reliable, maintainable, business-driven backend systems, owning work from architecture and implementation through deployment, monitoring, and production support.

I've led backend architecture for DR SMILE's multi-country booking platform, rebuilding its booking engine to improve performance by over 250%, reduce service costs by 75%, and increase booking accuracy. I also built scalable Java, Spring Boot, and PostgreSQL services, including a Referrals service that cut support costs by 20%.

Across freelance work, ADV GROUP, and ITSK, I've delivered production systems end to end—from architecture and data models to CI/CD, cloud deployment, monitoring, and support. I build reliable services with Java, Spring Boot, PostgreSQL, Kafka, Docker, Kubernetes, AWS, and GCP, and have led a backend team through planning, code reviews, and delivery.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Freelance

Jan 2025 - Present (1 year 7 months)

Designed and implemented backend integrations with external systems for reliable data processing. Architected PostgreSQL data models supporting millions of records and business-critical workflows.

Java Go Python TypeScript Kafka Docker Google Cloud Platform Cloudflare Keycloak PostgreSQL CI CD

Senior Java Developer

DR SMILE

Dec 2020 - Jan 2025 (4 years 1 month)

Led backend development and architecture for the booking platform used across multiple countries. Rebuilt the legacy booking engine, optimizing real-time slot allocation, improving performance by over 250%, reducing service costs by 75%, and increasing booking accuracy.

Java Spring Boot Microservices PostgreSQL RabbitMQ Docker Kubernetes AWS Bitbucket Prometheus Grafana Maven SQL OpenAI API Kotlin Python JavaScript

Senior Java Developer

ADV GROUP

Nov 2017 - Dec 2020 (3 years 1 month)

Led a backend team of 3 developers, driving task planning, code reviews, and successful project delivery. Engineered backend services and complex API connectors for large-scale marketing data ingestion with Java and Spring Boot.

Java Spring Boot JSF PostgreSQL SQL Redis NoSQL Vertica Clickhouse Docker Prometheus Grafana Tomcat IntelliJ IDEA Jira ETL Keycloak Python JavaScript Kotlin

Senior Software Engineer

ITSK

Aug 2014 - Nov 2017 (3 years 3 months)

Spearheaded the development and maintenance of a corporate document management system written in Java. Contributed to a 30% increase in employee productivity by optimizing report generation processes.

Java Spring Framework JSP SQL Pl SQL Tomcat Apache HTTP Server Documentum