# Sergei Dzeboev

Sergei Dzeboev is a remote worker on Himalayas, Senior Java Developer at Freelance, based in Germany.

Source: https://himalayas.app/@sergeidzeboev

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

| Detail | Value |
| --- | --- |
| Availability | Open to opportunities |
| Location | Germany |
| Authorized to work in | Germany |
| Job categories | Java Developer, Software Engineer, Backend Engineer, Cloud Engineer, DevOps Engineer, Technical Lead, Java Application Developer, Java Software Engineer, Java Developer |
| Skills | Java, SQL, Go, Python, JavaScript, TypeScript, Kotlin, BASH, Spring Framework, Spring Boot, Hibernate, JPA, Junit, Mockito, PostgreSQL, Oracle, MySQL, MongoDB, Redis, RabbitMQ, Kafka, AWS, Google Cloud Platform, Docker, Docker Compose, Kubernetes, Jenkins, GitHub Actions, Prometheus, Grafana, Microservices, Distributed Systems, REST APIs, OAuth, JWT, GraphQL, WebSockets, CI CD, Git, GitHub, Gitlab, Bitbucket, Maven, Gradle, Jira, Postman, Gitlab CI, Vertica, IntelliJ IDEA, Java 8, Keycloak, Cloudflare, Clickhouse, Apache HTTP Server, DBs, OpenAI API, Gitea |

## What I'm looking for

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

## About

```text
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

### Senior Java Developer (current)

Freelance. Jan 2025 - Present

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

Skills: Java, Go, Python, TypeScript, Kafka, Docker, Google-Cloud-Platform, Cloudflare, Keycloak, PostgreSQL, CI-CD

### Senior Java Developer

DR SMILE. Dec 2020 - Jan 2025

```text
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.
```

Skills: 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

```text
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.
```

Skills: 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

```text
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.
```

Skills: Java, Spring-Framework, JSP, SQL, Pl-SQL, Tomcat, Apache-HTTP-Server, Documentum

## Education

### Gorsky State Agrarian University

Bachelor of Economics, Economics

```text
Bachelor of Economics degree from Gorsky State Agrarian University.
```

### University of the People

Bachelor of Science, Computer Science

```text
Bachelor of Computer Science degree from the University of the People.
```

## Tech stack

- Postman
- Google Cloud Platform
- GitHub
- GitLab
- Bitbucket
- Kubernetes
- Docker Compose
- Cloudflare
- Jenkins
- GitHub Actions
- GitLab CI
- DB
- MySQL
- PostgreSQL
- MongoDB
- Vertica
- Spring Boot
- Spring Framework
- Redis
- IntelliJ IDEA
- Jira
- Gradle
- Java 8
- JavaScript
- Java
- Kotlin
- Kafka
- RabbitMQ
- Grafana
- Prometheus
- GraphQL
- JUnit
- Mockito
- Keycloak
- Apache HTTP Server
- SQL
- Clickhouse
- OpenAI API
- Gitea
- Bash

To contact Sergei, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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