Nataliia

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NATALIIA OSTAPIUK
LEAD SOFTWARE ENGINEER / JAVA & PYTHON / CLOUD & ML/AI

SUMMARY
Experienced in designing and delivering cloud-native solutions across finance, retail, and healthcare domains.
Strong background in Java, Python, Azure Cloud, AKS, ETL/Databricks, and DevOps automation. Hands-on
experience with ML/AI integration in enterprise systems (UBS AG UK). Led technical discovery, architecture
design, and cross-team collaboration. Conducted technical interviews for EPAM Poland & EPAM Ukraine (Java,
Cloud, System Design). Focused on reliability, performance, and scalable distributed systems.

SKILLS
Technologies / Standards
Spring Cloud Sleuth, Spring Cloud Security, Spring Cloud Function, Spring Cloud Data
Flow, Spring Cloud Config, Spring Integration
Java 7/8/11/17/25, Python 3, Groovy 3/4
GitHub, GitLab, Bitbucket
REST, SOAP
JDBC, SQL (Oracle, PostgreSQL, MySql, etc.), NoSQL (Azure Cosmos DB, Cassandra,
etc), Hibernate
JUnit 4/5, AssertJ, Hamcrest, Mockito, TDD, Cucumber
JMS, ActiveMQ, Kafka
Azure services (4+ years), AWS (1+ year)
XML/XSL/XSLT
UNIX shell scripting, K8s
Maven, Gradle

INTERVIEW EXPERIENCE (EPAM POLAND & EPAM UKRAINE)
●​ 100+ technical interviews conducted.
●​ Assessed coding proficiency, architectural thinking, and problem-solving.
●​ Participated in hiring decisions and competency framework updates.
●​ Provided feedback to candidates and contributed to improving interview processes.
●​ Supported internal interviewer training and calibration sessions.
WORK EXPERIENCE

UBS AG (UK)
Apr 2026 - Till Now
Java/Python/Cloud/ML Engineer

Project: Clearing & Operational Engineering — Java/Python/DevOps/Cloud/ML solutions.

●​ Delivered ML/AI-driven enhancements for operational processes and monitoring pipelines.
●​ Led discovery for new epics: requirements analysis, technical investigation, architecture options.
●​ Designed and presented system architecture, diagrams, and solution alternatives for stakeholders.
●​ Provided technical ownership: guided developers, reviewed code, resolved complex issues.
●​ Built and maintained Java 17/25 and Python services, including bug fixing and performance tuning.
●​ Built and supported EFK-based logging and metrics platform using Elasticsearch Service.
●​ Implemented monitoring and reliability improvements for AKS microservices.
Technologies: Java 17/25, Python 3, Spring (Security, MVC, Integration, Cloud), Terraform, Azure Cloud, AKS,
IntelliJ IDEA, VS Code.

UBS AG (UK)
Jan 2023 – May 2026 (3 years 3 months)
3rd Line / Software Maintenance Engineer (EPAM Systems)

Project: Contributed as part of the Clearing team within the trading division of a leading investment bank.
Collaborated closely with cross-functional teams to deliver robust solutions that improved system reliability,
performance, and transparency in the bank’s clearing operations.

●​ Led discovery initiatives for upcoming epics, including comprehensive requirements gathering and
in-depth technical analysis to ensure alignment with strategic project objectives.
●​ Designed and presented architectural solutions, developed system diagrams, and facilitated option
selection through stakeholder engagement.
●​ Provided technical ownership and development leadership, guiding teams through complex
problem-solving and best practices.
●​ Delivered ML/AI-driven enhancements for operational processes and monitoring pipelines.
●​ Developed and maintained robust solutions in Java and Python, encompassing bug resolution, code
reviews, and continuous optimization for Azure Cloud and Azure Kubernetes Service (AKS) microservices.
●​ Contributed to the design, implementation, and maintenance of ETL processes using Databricks, as well
as ongoing DevOps support and automation.
●​ Engineered and sustained an EFK-based (Elasticsearch, Fluentd, Kibana) logging and metrics collection
platform utilizing Elasticsearch Service.
●​ Implemented comprehensive platform monitoring solutions to ensure system reliability, performance.
●​ Collaborated within a cross-functional team (6 developers, 1 BA, 1 Scrum Master).
●​ Technologies: Java 17/25, Python 3, Spring (Security, MVC, Integration, Cloud), Databricks, Terraform,
Azure Cloud, AKS, IntelliJ IDEA, VS Code.
 Interactive Communications International, Inc.;
Jun 2022 - Oct 2022 (5 months)
Team Lead (EPAM Systems)

Project: Led a performance optimization initiative for Pricing and Billing modules, focusing on enhancing
database queries, refining database structures, and deploying a new on-premises hardware cluster to efficiently
distribute transactional load.

●​ Provided hands-on technical leadership and mentorship to the development team.
●​ Facilitated regular meetings with customers to gather requirements, clarify objectives, and
communicate progress.
●​ Actively contributed to coding efforts, ensuring high-quality and maintainable solutions.
●​ Conducted thorough code reviews to uphold best practices and code standards.
●​ Authored and maintained comprehensive supporting documentation for project deliverables and
processes.
●​ Conducted technical interviews.
●​ Technologies: Oracle, IntelliJ IDEA, Docker, Maven, Git, Postman, Jira, Liquibase, Java 8/11, Lombok,
MapStruct, Mockito, JUnit 5, Spring Core, Spring Security
 Canadian Tire Corporation Limited
Feb 2021 - Apr 2022 (1 year 3 months)
Key Engineer (EPAM Systems)

Project: Led the discovery and successful delivery phases of a major platform migration initiative in 2020,
ensuring seamless transition and continued functionality of critical systems on the new platform.Acted as
deputy to the team lead, supporting leadership and coordination of the development team.

●​ Facilitated and participated in Scrum ceremonies to drive agile delivery.
●​ Developed, maintained, and optimized application code, with a focus on quality and performance.
●​ Diagnosed and resolved bugs, ensuring system stability and reliability.
●​ Authored comprehensive unit and integration tests to maintain high code coverage and quality.
●​ Conducted code reviews to uphold best practices and mentor team members.
●​ Designed and implemented integrations between applications using JMS and Azure Service Bus.
●​ Provided onboarding and mentorship for new team members.
●​ Produced and maintained detailed supporting documentation for project deliverables.
●​ Conducted technical interviews.
●​ Technologie: Azure Cosmos DB, MS SQL, IntelliJ IDEA, Azure DevOps, Docker, Gradle, Maven, Ant, Git,
Postman, Jira, DBeaver, MS SQL Management Studio, Azure Functions, Azure Service Bus, Liquibase, Java 8/11,
Lombok, MapStruct, Mockito, JUnit 5, Spring Core, Spring Integration, Spring Batch, JMS

Cerner Medical Health
Oct 2020 - Jan 2021 (4 months)
Development Team Lead (EPAM Systems)

Project: Led the enhancement of Cerner products to ensure compliance with the 21st Century Cures Act,
focusing on regulatory alignment and improved healthcare interoperability.

●​ Provided technical leadership and direction to the development team.
●​ Designed and architected technical solutions for user stories and tasks.
●​ Reviewed and approved QA test cases to ensure comprehensive coverage and quality.
●​ Led the development of microservices to support new and existing product features.
●​ Conducted code reviews to maintain high standards and mentor developers.
●​ Oversaw release and sprint planning, ensuring timely and efficient delivery.
●​ Facilitated Scrum meetings to drive agile processes and team collaboration.
●​ Acted as the primary point of contact for customers, product owners, and Cerner’s technical
department.
●​ Managed CI/CD pipelines and project infrastructure to support continuous integration and deployment.
●​ Authored and maintained project documentation to support development and compliance needs.
●​ Conducted technical interviews.
●​ Technologies: MySQL, Ruby on Rails 5/6, Ruby 2.6/2.7
 Veeva Systems
Nov 2019 - Sep 2020 (11 months)
Key Engineer (EPAM Systems)

Project: Supported the client in the development of Vault RIM, an application designed to manage regulatory
workflows for go-to-market products in the Life Sciences industry.

●​ Participated in all phases of the software development lifecycle, from requirements analysis to
deployment.
●​ Actively contributed to task analysis and requirements development to ensure alignment with business
objectives.
●​ Developed and maintained high-quality code, adhering to best practices and project standards.
●​ Authored and executed unit and integration tests to ensure robust and reliable software.
●​ Conducted code reviews to maintain code quality and mentor team members.
●​ Provided guidance and mentorship to team members, fostering knowledge sharing and skill
development.
●​ Engaged in weekly negotiations and status meetings with customers to clarify requirements and report
progress.
●​ Documented project rules and processes, ensuring clear communication and consistency across the
team.
●​ Technologies & Tools: IntelliJ IDEA, Java 1.8, Spring Framework 4 (Spring Core), JDOM2, Maven,
Swagger/OpenAPI, JUnit, AssertJ, Mockito, Hamcrest, Cucumber

IHS Markit
Apr 2019 - Nov 2019 (8 months)
Senior java developer (EPAM Systems)

Project: Clearing platform development for IHS Markit.

●​ Led engineering efforts and ensured successful delivery of user stories.
●​ Owned delivery story design from inception to completion.
●​ Applied advanced JPA, lambda expressions, and functional programming.
●​ Developed and executed integration and unit tests.
●​ Technologies: PostgreSQL 11, MySQL 5, IntelliJ IDEA, Java 11 (OpenJDK), Spring Framework 5 (Core,
Data, Security, WebSocket, Messaging), Maven 3.6, ActiveMQ, Hibernate 5.x, Swagger/OpenAPI 3.0, JUnit 5,
AssertJ, Mockito, WireMock, DBUnit, Docker
 Chevron U.S.A. Inc.
Aug 2017 - Mar 2019 (1 year 8 months)
Backend Developer (EPAM Systems)

Project: Developed a high-scalable document storage application with synchronization between the database
and search engine.

●​ Participated in analysis, architecture, and design.
●​ Engaged in Scrum activities.
●​ Delivered Java and database solutions.
●​ Collaborated with frontend team for flexible, reliable architecture.
●​ Skills & Environment: Advanced JPA, Spring Data (Apache Solr), functional programming,
integration/unit testing; MS SQL 10, IntelliJ IDEA, Java 8, Spring 5, Hibernate, Apache Solr 6, Apache Hive, JUnit
5, AssertJ, Mockito, DBUnit

Raiffeisen bank, Ukraine
Feb 2015 - Jun 2017 (2 years 5 months)
Consult, Architect

Project: Developed integration solutions using IBM products and Java, enabling message exchange via brokers
to connect diverse software systems with various integration patterns (synchronous, asynchronous,
point-to-point, pub/sub).

●​ Designed, developed, and optimized integration solutions.
●​ Performed database development (PL/SQL) and basic server administration (Tomcat, JBoss, IBM
Broker).
●​ Implemented manual and automated tests (JUnit, Mockito, Bamboo).
●​ Consulted on migration to new platforms (WSO2 ESB, JBoss Fuse, Mulesoft).
●​ Provided technical guidance, code reviews, and third-line production support.
●​ Collaborated closely with clients throughout all project phases.
●​ Environment: Oracle, Sybase, DB2, MSSQL, MySQL, Eclipse, TOAD, PL/SQL Developer, SVN, CVS, GIT,
JBoss, Tomcat, IBM WebSphere (MQ, Message Broker, Transformation Extender), Java EE/SE (1.6–1.8), Spring,
Hibernate, JUnit, Mockito, Web Services (SOAP, REST), XML, JSON, HTML, CSS, JavaScript, jQuery
Finance and credit bank, Ukraine
Oct 2011 - Feb 2013 (2 years 5 months)
Engineer

Project: Developed Java web applications integrating HTTP, FTP, SOAP, and related protocols.

●​ Built and maintained Java web applications using XML, Web Services (WSDL, SOAP), and Oracle.
●​ Administered WebLogic and GlassFish servers.
●​ Developed SQL and PL/SQL scripts.
●​ Communicated with business clients to gather requirements and support testing.
●​ Provided third-line production support.
●​ Environment: Oracle, MySQL, NetBeans, TOAD, PL/SQL Developer, MySQL Workbench, SVN, CVS, GIT,
WebLogic, GlassFish, JBoss, Tomcat, Java EE/SE (1.6, 1.7), Servlets, JSP, JSF, JMS, JUnit, JDBC, Mockito, Spring,
Hibernate, HTML, CSS, JavaScript, jQuery, SOAP, REST, XML, JSON

Pravex-bank, Ukraine
Oct 2006 - Sep 2011 (5 years)
Engineer

Project: Developed of IBM ESB/Java/PowerBuilder integration solutions.

●​ Developed integration solutions using IBM ESB, Java, and PowerBuilder.
●​ Utilized Java and Oracle for daily development tasks.
●​ Conducted research, design, and technical documentation.
●​ Provided third-line production support.
●​ Tools & Technologies:​
Java EE/SE (1.6), Servlets, JSP, JMS, Oracle (PL/SQL), Sybase, HTML, CSS, JavaScript, Web Services (WSDL,
SOAP, REST), XML, JSON, Eclipse, TOAD, PL/SQL Developer, PowerBuilder, IBM ESB

Outsourcing, Ukraine
Sep 2005 - Sep 2006 (1 year 1 month)
Engineer

Project: Developed PowerBuilder 6/9 applications.

●​ Gathered requirements, designed, and developed PowerBuilder applications.
●​ Supported and enhanced existing software per client requests.
●​ Documented business rules and technical designs.
●​ Tools & Technologies: PowerBuilder 6/9, Sybase, HTML, CSS, JavaScript, CVS
EDUCATION
●​ Bachelor’s Degree at Electrical engineering, Kharkov National University of Radio electronics
●​ Specialist Degree at Electrical engineering, Kharkov National University of Radio electronics

CERTIFICATES
2021 - Microsoft: Microsoft Certified: Azure Fundamentals

LANGUGES
●​ English – B2
●​ Ukrainian - Native
●​ Russian - Fluent
●​ Polish – A2

ADDITIONAL INFORMATION
Maternity leave from 2013 till 2015.