Кирило

Kyrylo Starostin
Java Software Engineer
Dnipro, Ukraine • [open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)

PROFESSIONAL SUMMARY

Results-driven Java Software Engineer with 6 years of commercial experience designing, developing, and
optimizing high-load enterprise applications and cloud-based backend systems within E-commerce and
LegalTech domains. Proven expertise in building scalable microservices, high-performance REST APIs, and
robust data processing pipelines. Passionate about clean architecture, system performance tuning, and
delivering reliable software solutions.

TECHNICAL SKILLS

Programming Languages Java (8–25), JavaScript, SQL, C++ (basic)
Frameworks & Libraries Spring (Boot, Cloud, Security, Data, etc), Hibernate / JPA / JDBC, JUnit, Mockito

Databases & Caching PostgreSQL, MySQL, MongoDB, Redis

Messaging & Integration RabbitMQ, AWS SQS, REST API, SOAP, GraphQL, Swagger / OpenAPI

Cloud, DevOps & Tools AWS (Amazon Web Services), Docker, Maven, Git, Jmeter, Flyway\Liquibase,
Vault

Monitoring & Observability Prometheus, Grafana, ELK Stack (Elasticsearch, Logstash, Kibana), Jaeger,
SonarQube

PROFESSIONAL EXPERIENCE

VARUS, Omega LTD | Java Software Engineer
April 2023 – September 2025 | Dnipro, Ukraine (Remote/Hybrid)
• Continued backend development and maintenance for the high-load Varus mobile application platform,
supporting thousands of active daily users.
• Optimized database queries and schemas across MongoDB, PostgreSQL, and MySQL to significantly
improve response times during peak shopping hours.
• Enhanced asynchronous message processing and real-time notification delivery pipelines using RabbitMQ
and Firebase.
• Managed deployment and scaling on dedicated servers hosted on Hetzner Cloud and internal company
infrastructure.

Knubisoft | Java Software Engineer
July 2022 – April 2023 | Remote
• Developed a secure, cloud-based enterprise system for US law firms and legal departments focused on
storage, collection, automated indexing, and visualization of messenger data for litigation.
• Designed and implemented robust RESTful APIs using Spring Boot and Spring JDBC Templates
interacting with PostgreSQL, backed by Flyway for smooth database migrations.
• Integrated core cloud components on Amazon Web Services

• Containerized application services with Docker.
 • Implemented centralized logging, tracing, and monitoring solutions using Grafana and Kibana to ensure
high system availability.

VARUS, Omega LTD | Java Software Engineer
January 2020 – July 2022 | Dnipro, Ukraine
• Contributed to the core backend architecture and feature development of the Varus mobile client
application ecosystem.
• Implemented backend services handling product catalogs, user sessions, and order placement flows using
Java and MongoDB/PostgreSQL.
• Integrated third-party services.

EDUCATION

• Dnipro National University of Railway Transport — Bachelor’s degree in Software Engineering
(Graduated 2021)
• Professional Courses: Advanced Java and SQL (2021), C++ Fundamentals (2016)

LANGUAGES

• English: B2 (Upper-Intermediate)
• Ukrainian: Native
• Russian: Native