Dorota Janicka-Bratoszewska

Backend • Warsaw, Poland • UTC+01:00 • In office, Partially remote, Fully remote • Work permits: Poland • Can start in 2 weeks

Java Developer

10+ years exp

Java

SQL

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Overview

Technical skills

Timeline

Roles

Overview

Java backend developer with 9+ years of experience building backend services using Spring Boot and PostgreSQL. Focuses on event-driven architecture and designing complex features end-to-end, including testing and code review leadership. Has worked across microservices and application migrations, including Java version upgrades and deployment pipeline changes.

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Technical skills

Java

SQL

Java

Hibernate

Spring Boot

Maven

Testcontainers

Liquibase

Quarkus

Kotlin

Mockito

Databases

Oracle

Apache Kafka

PostgreSQL

Redis

DevOps

AWS

Jenkins

Kubernetes

Grafana

OpenShift

CI/CD

Mobile

JUnit

Timeline

Senior Java Developer • Senior

JIT Team • Full-Time

Oct 2025 to Present 1 Year Warsaw In office

Developed backend services for a worktime management platform, delivering end-to-end features including time-ranged configuration models. Built event-driven integrations between microservices and led multi-round code reviews to enforce team conventions. Wrote unit and integration tests and optimized persistence logic using JPA query tuning.

Java

Spring Boot

PostgreSQL

Maven

Liquibase

JUnit

Mockito

Testcontainers

Java Developer • Middle

SIX • Full-Time

Nov 2023 to May 2025 1 Year 6 Months Warsaw In office

Created and extended an internal application, including implementing a workflow for uploading changes. Participated in code reviews and improved delivery processes. Migrated the deployment pipeline from Jenkins to GitLab-based CI/CD.

Java

Spring Boot

Jenkins

Java Developer • Middle

Pretius • Full-Time

Jan 2023 to Sep 2023 8 Months Warsaw In office

Developed new features for a customer management application, including sales and award-related modules, and fixed production issues based on log analysis. Used observability signals such as Grafana alerts and AWS database monitoring to diagnose bugs. Worked with a microservices setup involving Kafka and REST services, alongside automated unit testing.

Java

Hibernate

AWS

Apache Kafka

Maven

Oracle

JUnit

Mockito

Java Developer • Middle

Essembli • Full-Time

Feb 2018 to Dec 2022 4 Years 10 Months Warsaw In office

Implemented and maintained functionality for Oracle Customer Care and Billing while collaborating with analyst and testing teams. Built migration utilities and improved performance through code review, debugging, and iterative refactoring. Produced and maintained technical documentation to support ongoing development and operations.

Java

Hibernate

Oracle

JavaScript

COBOL

Perl

Junior Software Developer • Junior

CGI Information Systems and Management Consultants • Full-Time

Dec 2016 to Jan 2018 1 Year 1 Month Warsaw In office

Created documentation templates in the Thunderhead platform and supported software testing activities focused on performance verification. Worked with Java-based components and structured test-related assets. Contributed to technical documentation and validation steps using Oracle database queries.

Java

Hibernate

Oracle