Володимир

VOLODYMYR KOTSKO
JAVA BACKEND DEVELOPER
Lviv, Ukraine · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section)

PROFESSIONAL SUMMARY
Java Backend Developer with 4 years of professional experience building scalable backend systems and microservices, with a strong focus
on the Java ecosystem and Spring framework. Experienced in developing high-load distributed systems, event-driven architectures, and
cloud-native applications using Java, Spring Boot, Spring Cloud, Kafka, and AWS. Hands-on experience with systems processing up to
500,000 requests/minute, GraphQL, BFF services, distributed systems, caching, observability, and ML-backed applications. Strong
problem-solving skills, effective communication, and collaborative teamwork.

PROFESSIONAL EXPERIENCE
UKEESS | Backend Developer | 4 years
• Designed and developed scalable Java and Spring Boot microservices across three major production projects.
• Contributed to a centralized website logging platform handling approximately 500,000 requests/minute; redesigned services for scalability and
high-throughput distributed workloads.
• Implemented event-driven architectures using Apache Kafka and asynchronous communication with Kafka, AWS SNS, and SQS.
• Developed cloud-native backend components using AWS ECS/EKS, EC2, Lambda, S3, RDS, ElastiCache, SNS, SQS, DynamoDB, CloudWatch, and
IAM.
• Worked with MySQL, RDS, DynamoDB, Redis/ElastiCache for persistence, caching, and high-performance data access.
• Built BFF services for high-load mobile applications using Java, Spring, GraphQL, and Node.js; designed APIs integrating multiple backend
services.
• Developed core functionality for a community detection platform, integrating machine-learning algorithms into a predominantly Java-based
backend; additionally worked with Python for data processing and ML functionality.
• Developed a computer-vision face-classification project using DBSCAN clustering and vectorization techniques.
• Containerized applications with Docker and contributed to CI/CD using GitHub Actions, Jenkins, and Harness.
• Used New Relic and AWS CloudWatch for monitoring, observability, production troubleshooting, and performance optimization.
• Participated in backend architecture, technical design, implementation, debugging, optimization, and production support.

EPAM | Java Developer — Lab & Internship | 6 months
• Completed a 6-month Java Lab and internship program focused on practical backend development and enterprise software engineering.
• Worked on a real-world project as part of the development team, applying Java and Spring technologies in a production-oriented environment.
• Strengthened practical skills in Java, Spring, REST APIs, databases, Git, testing, debugging, and collaborative software development.
• Participated in code reviews, task analysis, implementation, and team-based development workflows.

TECHNICAL SKILLS
Programming Java · Python · JavaScript · Node.js AWS ECS · EKS · EC2 · Lambda · S3 · RDS ·
Languages ElastiCache · DynamoDB · CloudWatch ·
Java & Spring Spring Boot · Spring Cloud · Spring IAM
Security · Spring Data JPA Databases & Caching MySQL · DynamoDB · Redis · ElastiCache
Backend & Architecture Microservices · Distributed Systems · DevOps & CI/CD Docker · GitHub Actions · Jenkins · Harness
High-Load Systems · Event-Driven Monitoring New Relic · AWS CloudWatch
Architecture · BFF · REST · GraphQL · API
Design
Messaging Apache Kafka · AWS SNS · AWS SQS

EDUCATION
Lviv Polytechnic National University Master's Degree in Computer Science · Bachelor's Degree in Computer Science

LANGUAGES
English: Intermediate · Ukrainian: Native

Volodymyr Kotsko · Java Backend Developer