Станіслав

Stanislav Zholobetskyi
Senior Java Engineer
Kyiv, Ukraine · Remote
[відкрити контакти](див. вище в блоці «контактна інформація») · [відкрити контакти](див. вище в блоці «контактна інформація»)
English — B2 (Upper-Intermediate)

PROFILE
Senior Software Engineer with 20 years of software development experience, including 7+
years focused on Java and more than 15 years working on international projects for large
companies.

Experienced in developing and maintaining backend and REST API solutions, working with
relational and NoSQL databases, cloud services, message brokers, and distributed systems.
Strong background in AWS, MySQL, Oracle, Redis, RabbitMQ, performance optimization,
production troubleshooting, root-cause analysis, and integration testing.

I have worked on long-term projects in fintech, payments, gambling, broadcasting, retail, and
enterprise software, taking responsibility for both new functionality and existing production
systems. I am comfortable working independently, collaborating with distributed teams,
reviewing code, investigating complex problems, and improving existing solutions.

Currently pursuing a PhD in Computer Science and researching Mining Software
Repositories, with a particular interest in AI-assisted software engineering and developer
productivity.

CORE SKILLS
Java & Backend: Java, Groovy, REST APIs, backend development, distributed systems
Cloud: AWS ECS, Lambda, API Gateway, CloudWatch, Terraform
Databases: MySQL, Oracle, PostgreSQL, MariaDB, Redis
Messaging: RabbitMQ, ActiveMQ
Testing: JUnit, Mockito, Testcontainers, JMeter, integration testing, API testing
DevOps & Quality: GitHub, GitLab, Docker, Podman, SonarQube
Monitoring: CloudWatch, Grafana, Kibana
Development Practices: Code Review, Root Cause Analysis, Performance Optimization,
Scrum, Kanban
Additional: Python, SQL/PLSQL, GCP, BigQuery

PROFESSIONAL EXPERIENCE
Ciklum — Senior Java Developer
02/2025 – 08/2026

Fintech / Digital Wallet Platform

Worked on a large-scale wallet platform operating in the EU and UK through third-party
banking systems and open banking. The platform handled scheduled payments, transaction
notifications, account activity, and integrations with payment providers, trading providers, BI
systems, frontend applications, and MFA providers through REST APIs.

Responsibilities & achievements

● Developed and maintained backend functionality using Java.
● Designed and implemented new REST API endpoints required for a major UI
revamp.
● Investigated production issues and performed Root Cause Analysis of complex
backend problems.
● Performed backend code reviews and reviewed proposed changes.
● Investigated and resolved a balance discrepancy issue, identified the root cause,
and implemented locking to prevent inconsistent operations.
● Implemented idempotency checks for critical endpoints to improve reliability of
payment-related operations.
● Implemented new business verifications and statuses in existing processing flows.
● Created integration tests using Testcontainers.
● Worked on performance optimization and reliability improvements.

Technologies: Java, Python, MySQL, AWS ECS, AWS Lambda, API Gateway, CloudWatch,
GitHub, Terraform, SonarQube

Ciklum — Java Software Engineer
10/2021 – 12/2024

Gambling / Casino Back-office Platform

Worked on a large-scale back-office system supporting casino operations and integrating
with payment providers, game providers, BI systems, frontend applications, and other
third-party systems through REST APIs.

Responsibilities & achievements

● Developed new backend functionality and maintained existing Java services.
● Investigated and fixed complex production issues.
● Resolved problems related to payments processed in parallel, improving
correctness of concurrent processing.
● Implemented integration with external game provider APIs.
● Investigated and optimized performance-related issues.
● Performed Root Cause Analysis of incidents.
● Conducted backend code reviews.
● Developed an internal tool for searching and comparing database changes between
Git tags.
● Implemented a connector for retrieving data from the Looker API.
● Implemented a Sanction Check solution consisting of business logic, scheduled
tasks, and alerting.
● Worked with asynchronous communication and distributed components using
RabbitMQ and Redis.

Technologies: Java, Groovy, Python, RabbitMQ, Redis, GitLab, Grafana, Kibana

GlobalLogic — Senior Oracle Developer / Oracle
Technical Lead
04/2011 – 10/2021

Broadcasting Management System

Worked on a large enterprise Broadcasting Management System consisting of multiple
business and technical modules, including Sales, Acquisitions, Financial, Infrastructure,
Workflow, and REST API components.

Responsibilities & achievements

● Developed new functionality and supported existing enterprise systems.
● Progressed from Senior Oracle Developer to Oracle Technical Lead.
● Designed and implemented multiple business modules.
● Worked on database-heavy applications and complex SQL/PLSQL solutions.
● Developed internal tools to automate development and build processes.
● Introduced Sonar and static code analysis into the development process.
● Developed a PLSQL plugin and an Angular-based log analysis tool.
● Contributed to development of new UI and REST API components.
● Performed research and development of new technical solutions.

Technologies: Oracle, PL/SQL, Java, C#, Python

EasyLogic — Software Developer
07/2006 – 03/2011

Developed and maintained an enterprise ERP system covering Accounting, CRM,
Warehouse, Delivery Tracking, HR, and Transport for a large-scale food distribution
business.

Focused on developing new functionality, supporting existing systems, and optimizing
complex Oracle queries. Gained substantial experience working with large datasets and
database performance.

Technologies: Delphi, Oracle, DevExpress, FastReport

EDUCATION
PhD Student, Computer Science
Institute for Information Registration, NASU · 2024–2028

Research interests: Mining Software Repositories, AI-assisted software engineering,
developer productivity.

Master, Computer Science
NTUU KPI · 2002–2008