Владислав

Stupak Vladislav
Java Backend & AI Automation Engineer

Phone: [открыть контакты](см. выше в блоке «контактная информация»)
E-mail: [открыть контакты](см. выше в блоке «контактная информация»)
Location: Ukraine

Professional Profile
Java Backend Developer with 5+ years of commercial experience, mainly in European enterprise
leasing systems. Specialized in microservices, REST APIs and relational databases. Strong background in
production support, system stability, and complex business logic typical for financial and leasing domains.

Backend & Java Tools & Process

● Java 8–17 ● Git
● OOP, Collections, JVM ● Maven, Gradle
● Spring Boot, Spring Data JPA, Hibernate ● Jira
● REST APIs, JSON, XML, WSDL ● Bamboo (CI/CD)
● Harbor (container registry)
Frontend (enterprise)

● JSF AI & Automation
● PrimeFaces
● RichFaces ● n8n (self-hosted workflow automation)
● Make (Integromat)
Databases ● Zapier
● LLM APIs: OpenAI, Anthropic Claude
● Oracle ● Prompt engineering
● MySQL ● Webhook & REST API orchestration
● MongoDB
● SQL

Security

● Keycloak (authentication, authorization)

Infrastructure & Runtime

● Docker
● Kubernetes
● Tomcat, WildFly, JBoss

Professional Experience

Freelance - AI Automation Engineer

Aug 2025 – Present, parallel to main role

Domain: AI-powered business process automation
Stack: n8n, Make, Zapier, OpenAI API, Anthropic API, REST, Webhooks, JSON
Responsibilities and impact:
● Designing and implementing automation workflows on n8n, Make, and Zapier for clients.
● Integrating LLM APIs (OpenAI, Anthropic) into business processes: content generation,
data extraction, classification, summarization
● Building custom integrations (CRM, email, messaging, databases) via REST APIs and
webhooks
● Developing self-hosted n8n instances for clients requiring data privacy

Asseco Data Systems (EU / Poland, remote)

Full Stack Java Developer (2021 – 2026)

Domain: European enterprise leasing systems
Architecture: Microservices, REST-based integrations

Responsibilities and impact:
● Development and maintenance of microservices used in European leasing systems
● Implementation and evolution of REST APIs supporting complex leasing workflows
● Integration with external enterprise systems
● Daily work with Oracle
● Production support: fixing critical issues, analyzing logs, stabilizing live systems
● Improving reliability of backend services in long-running enterprise environments
● Participation in code reviews and technical discussions within distributed EU teams
● Development and support of JSF-based web interfaces (PrimeFaces, RichFaces)

Tech stack: Java 8-17, Spring Boot, JPA/Hibernate, Maven, Oracle, Keycloak, Docker, Git

DIGI CODE
Java Developer

● Backend development for gaming platforms
● Participation in development of web and mobile solutions
● Work on projects for large international clients (including Poker platforms)

NIX Solutions
Java Developer

● Development and support of USA insurance-related software systems
● Backend logic and data processing

Playtika
Technical Designer

● Participation in multiple commercial gaming projects
● Platforms: Facebook, Mobile
(early career experience)

Education
Dnipro State Technical University of Railway Transport
Bachelor’s Degree — Software Engineer, 2015

Languages
● English — Intermediate (technical documentation, daily work communication)
● Ukrainian — Native
● Russian — Native
● Polish — B1