Ігор

Polishchuk Ihor
Java/Backend
Ukraine, EU, Remote
[open contact info](look above in the "contact info" section)
Git hub, pets project: [open contact info](look above in the "contact info" section)
SRM-System: https://github.com/Hikinokouji/CoffeeFlash https://github.com/Hikinokouji
Stream-Service: https://github.com/Hikinokouji/SMP-StreamingService
https://t.me/Hikouji

About Me:
Proactive Backend Developer with 3+ years of experience in building scalable web applications.
Specialist in Java (Spring Boot) and Cloud infrastructure (AWS). Proven track record in designing
microservices and optimizing high-load data streams (Kafka, Redis). Passionate about clean code
(SOLID) and efficient DevOps practices. Focus on delivering high-quality, reliable solutions in
dynamic team environments.

Experience:

Java Backend Developer | StartUpp
December 2023 – February 2026
Responsibilities & Key Achievements:
Development & Architecture: Designed and implemented the server-side logic using
Spring Boot 3, transitioning to a microservices architecture to enhance system scalability.
Cloud & DevOps: Orchestrated infrastructure deployment on AWS (EC2, S3, Aurora) and
automated workflows using CI/CD pipelines (Docker/Kubernetes), reducing deployment time
by 40%.
Data Optimization: Optimized PostgreSQL database schemas and integrated Redis for
caching, resulting in a significant reduction in API response latency.
Messaging & Streaming: Integrated Apache Kafka for asynchronous communication and
implemented streaming protocols (RTMP/HLS) for seamless media delivery.
Security: Enhanced application security by implementing Spring Security (JWT) for robust
authentication and authorization.

Education:

Sumy State University
September 2024 – January 2026
Master of Science (MSc) in Power Machinery Engineering

Sumy State University
September 2020 – June 2024
Bachelor of Science (BSc) in Power Machinery Engineering
 Specialized High School (Grades 9–11)
Concentration: Mathematics and Physics

Languages:

Ukrainian: Native
Russian: Native
English (B1): Intermediate (Specializing in technical and mathematical terminology)
German (B1): Intermediate
Swedish (A2): Elementary / Pre-intermediate

Skills:

Java Core 8-21, Java EE
Frontend: JavaScript, React
Framework:
Spring Boot 3+, Spring Data JPA, Spring Security
Systems & Architecture:
Microservices, Client-Server Architecture
DevOps & Infrastructure:
Kubernetes, Docker, CI/CD Pipelines, Linux
Administration (x64/ARM), Nginx,
Data: SQL (Postgres), NoSQL

Other technology:
- Figma
- Git (Github/GitLab)
- Maven/Gradle
- Postman, Intelij IDEA
- JavaFX
- Android Studio
- AWS (EC2, S3, Aurora, VPC, SNS, Kinesis)
- Redis
- Appache Kafka
- Streaming technologies and protocols (RTMP, HLS)
- OOP
- Software design principles: SOLID