Особисті дані приховані

YURII ILCHYSHYN
Location: Lviv, Ukraine
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY
Backend Engineer focused on FinTech, with 4+ years of commercial experience building backend systems
with Node.js, TypeScript, and cloud technologies.
Experienced in developing FinTech products and payment infrastructure, including PSP integrations,
financial APIs, payment workflows, event-driven systems, and AWS services. Strong background in
Domain-Driven Design, system design, and building backend services from scratch.
Comfortable working across both technical and product aspects of a system — from defining architecture
and business logic to integrating external providers and delivering production-ready services.

SKILLS
Programming Languages: TypeScript, JavaScript, Java, SQL
Backend: Node.js, NestJS, Express.js, Spring Boot, REST APIs, GraphQL, WebSockets
Architecture: Domain-Driven Design, Event-Driven Architecture, Microservices, System Design
Databases: PostgreSQL, DynamoDB, MongoDB, MariaDB
Messaging & Integrations: RabbitMQ, PSP integrations, payment & financial APIs, OpenAI API
Cloud & Infrastructure: AWS (Lambda, S3, EC2, RDS, DynamoDB), Azure, Firebase
CI/CD & DevOps: Docker, Kubernetes, GitHub Actions, Jenkins
Testing: Jest, Cypress, Playwright
Authentication: JWT, OAuth2 (Google, GitHub, Auth0)
Frontend (supporting): React.js, Next.js, React Native, Zustand

WORK EXPERIENCE
Calytics — Backend Developer Aug 2025 - Present
Munich, Germany
• Worked on a FinTech product built from scratch, focused on payment API infrastructure for the
European market.
• Designed and implemented backend architecture using Domain-Driven Design.
• Worked closely with the CTO on system design and technical decisions.
• Developed backend services for payment-related operations and financial workflows.
• Integrated PSPs and external financial APIs into the platform.
• Implemented event-driven flows for asynchronous payment operations and provider webhooks.
• Worked on AWS infrastructure and cloud-based backend services.
• Participated in product and business discussions and helped turn requirements into technical solutions.
• Worked on the onboarding of the first B2B customer and adapted the system to real business
requirements.
Technologies: TypeScript, Node.js, NestJS, Express.js, AWS, PostgreSQL, DynamoDB, Domain-Driven
Design, Event-Driven Architecture, REST APIs, PSP integrations.

Appexoft — Backend Developer Oct 2023 - Jun 2025
Lviv, Ukraine
• Developed backend systems for several products from scratch using Node.js, TypeScript, and NestJS.
• Built the backend for Griddy, a football mobile application, including APIs, real-time communication,
database integration, and AWS services.
• Designed PostgreSQL schemas and implemented the main business logic for the application.
• Developed backend functionality for PulseAI, a health-tracking application with patient history and an AI
assistant.
• Integrated OpenAI API into the application.
• Worked on a US photo booth management platform using Express.js and MariaDB.
• Worked with different product teams and adapted backend architecture to different business and
technical requirements.
Technologies: TypeScript, Node.js, NestJS, Express.js, PostgreSQL, AWS, Firebase, WebSockets, OpenAI
API, MariaDB.

Im2be — Full Stack Developer Sep 2022 - Aug 2023
• Worked on a platform and mobile application for teenagers, with a primary focus on backend
development.
• Developed 4 out of 9 microservices used by the platform.
• Built the Authorization Service and implemented authentication and authorization logic.
• Developed an AI monitoring service for the platform.
• Built the Family Communication Service for communication between teenagers and their families.
• Developed the Notification Service, including custom schedulers, assigned events, and push
notifications.
• Worked with RabbitMQ for communication between microservices.
• Worked mainly with Java and Spring Boot on the backend and contributed to the React Native
application when needed.
Technologies: Java, Spring Boot, RabbitMQ, Azure, NestJS, Microservices, React Native, Zustand.

ADDITIONAL INFORMATION
Languages: English C1, Ukrainian Native

EDUCATION
Bachelor in Computer Science 2023 - 2027
Lviv Polytechnic National University, Ukraine