Hello, I'm
Denys Ohorodnik
Senior Java Developer
About Me
Senior Java Developer
With over 6 years of experience in building high-performance backend systems, I specialize in creating scalable solutions using Java, Spring Boot, and modern distributed technologies.
My expertise spans across microservices architecture, database optimization, and enterprise-level system design. I have a proven track record of solving complex technical challenges and delivering solutions that handle thousands of daily transactions with exceptional reliability.
Career Highlights
High-Performance Caching
Architected Hazelcast solution reducing database load by 70% and improving response time by 40%
Microservices Excellence
Led development of critical microservice handling 10,000+ daily transactions with 99.9% uptime
Legacy Migration
Migrated monolithic application to microservices, reducing deployment time from days to hours
Query Optimization
Optimized SQL queries processing millions of records, cutting execution time by 30%
Professional Experience
Senior Java Developer
Portum (via Modus Soft)
White-label SaaS for Cisco BroadWorks management serving 50K+ users with 10K+ daily transactions.
Java Developer
Avery Dennison D2Comm (via SoftServe)
Enterprise e-commerce platform for custom apparel labeling with cross-platform design editor.
Trainee Java Developer
Home Away (via SoftServe)
Travel accommodation booking platform built with microservices architecture.
Technical Skills
Comprehensive expertise in modern Java development, distributed systems, and enterprise-grade technologies with proven track record in high-traffic applications.
Backend Development
Distributed Systems
Databases
DevOps & Tools
Monitoring & Testing
Methodologies
Core Technologies & Achievements
Professional Projects
Enterprise-level projects demonstrating expertise in scalable backend systems, microservices architecture, and high-performance optimization.
Portum - BroadWorks SaaS Platform
White-label SaaS for Cisco BroadWorks management serving 50K+ users with 10K+ daily transactions. Led architecture and development of high-performance microservices.
Key Achievements:
- Reduced database load by 70% with Hazelcast caching solution
- Achieved 99.9% uptime handling 10,000+ daily transactions
- Migrated from monolith to microservices architecture
- Optimized SQL queries reducing execution time by 30%
Technologies:
Project Metrics
Avery Dennison D2Comm
Enterprise e-commerce platform for custom apparel labeling with cross-platform design editor. Focused on backend optimization and ETL pipeline development.
Key Achievements:
- Improved system response time by 25%
- Built Python ETL pipeline processing 100K+ daily configurations
- Refactored legacy Spring 4 components
- Implemented asynchronous request processing
Technologies:
Project Metrics
Home Away Booking Platform
Travel accommodation booking platform built with microservices architecture. Contributed to backend architecture and performance optimization.
Key Achievements:
- Implemented microservices architecture for booking system
- Designed RESTful API endpoints and database schema
- Created comprehensive unit and component tests
- Optimized pagination and performance based on benchmarking
Technologies:
Project Metrics
Open Source & Personal Projects
Explore my algorithm implementations, Spring Boot demos, and modern Java development patterns on GitHub. Including circuit breaker implementations, Kafka streaming, and performance optimization examples.
View GitHub ProfileLet's Work Together
Ready to build something amazing? I'm always interested in discussing new opportunities, challenging projects, and innovative solutions in Java development.
Get In Touch
den.ohorodnik@gmail.com
Send me an email for business inquiries
denys-ohorodnik-a82041154
Connect with me professionally
Telegram
@denys.ohorodnik
Quick messaging and communication
GitHub
denys-ohorodnik
View my code and contributions
Currently Available
Open to new opportunities in backend development, microservices architecture, and distributed systems. Remote or hybrid positions preferred.
Why Choose Me?
Specializations
Response Time
I typically respond to inquiries within 24 hours. For urgent matters, feel free to reach out via Telegram.
Ready to Start a Project?
Let's discuss how I can help bring your ideas to life with robust, scalable Java solutions.
Send Me an Email