Summary
Overview
Work History
Education
Skills
Certification
Timeline
Generic
ILLIA HENZEL

ILLIA HENZEL

Warsaw,14

Summary

Java developer with background in building scalable microservice applications. Worked on large, complex enterprise solutions for major retail and service companies like Screwfix and Sephora.Led team through challenging project, delivering on time while maintaining high standards. Skilled in Java, Spring Boot, Hibernate, and Microservices architecture.

Strong focus on team collaboration and achieving impactful results

Overview

4
4
years of professional experience
1
1
Certification

Work History

Senior Java Engineer

Sephora USA
04.2022 - Current
  • Optimized application performance by conducting thorough profiling and performance tuning, specifically targeting workloads running on Azure Virtual Machines. Implemented resource optimization strategies, reducing compute and storage overhead, which resulted in faster load times, enhanced end-user satisfaction, and significant cost savings for customers by minimizing Azure VM usage and optimizing cloud resource allocation.
  • Stepped in as team lead after the unexpected departure of the original lead, taking charge of the team and managing tasks. Motivated colleagues to stay focused and productive, which helped ensure the project was completed on time and met all client expectations.
  • Automated deployment processes using DevOps tools, specifically implementing Jenkins pipelines, which sped up release cycles and minimized human error by ensuring consistent and reliable deployments.
  • Convinced project architects to adopt GraphQL for client-server communication, resulting in the elimination of boilerplate code and the creation of a unified entry point for Android, iOS, and Web clients, streamlining development and improving efficiency across platforms.
  • Performed lots of technical interview for new Software Engineers.
  • Experience of working in distributed team ( USA - Poland - India - Brazil )

Java Engineer

Screwfix Direct
01.2021 - 01.2022
  • Enhanced the resilience of system components in REST API communication between services in a Spring Boot microservices application by configuring circuit breakers, timeouts, and retries in the aggregation service, ensuring improved fault tolerance and stability.
  • Led the initiative to integrate MDM (Master Data Management) into our system and successfully migrated data from the legacy BCC (Business Control Center) to the new MDM. Implemented an event-driven approach, where MDM asynchronously transmitted data via Kafka, improving data flow efficiency and system scalability
  • Championed adoption of test-driven development, resulting in higher code quality and reduced time spent on bug fixes.
  • Improved memory usage by optimizing Hibernate queries, reducing overhead and enhancing the overall performance of the application.

Education

Bachelor of Science - Computer Engineering

Kharkiv Polytechnic Institute
Kharkiv/Ukraine
05.2023

Skills

  • Java 11/17
  • Microservices Architecture
  • Spring Boot
  • Hibernate
  • Apache Kafka
  • MySQL
  • GraphQL
  • Rest API's
  • Redis
  • Camunda
  • Microsoft Azure
  • AWS
  • Docker
  • Jenkins

Certification

AWS Certified Cloud Practitioner

Timeline

Senior Java Engineer

Sephora USA
04.2022 - Current

Java Engineer

Screwfix Direct
01.2021 - 01.2022

Bachelor of Science - Computer Engineering

Kharkiv Polytechnic Institute

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ILLIA HENZEL