Станіслав

Stanislav Kravchenko
Node.js Developer
[open contact info](look above in the "contact info" section), [open contact info](look above in the "contact info" section), LinkedIn, Kropyvnytskyi, Kirovohrad,
Ukraine

Hard skills

• Javascript • Typescript • Node.js• Express.js • Nest.js • OOP • Unit testing • SQL (
PostgreSQL) (Redis, MongoDB) • WebSockets • GraphQL • Git • JWT • REST API • Docker
• Microservices • Kafka • NATS • PrismaORM • TypeORM • React.js

Professional experience

PayEngine | Dec 2023 - Feb 2025
Back End Developer
At PayEngine, I worked on developing and maintaining a robust payment platform
that enables vertical market software companies to monetize their revenue
effectively. My responsibilities included designing and implementing microservices
using Node.js, integrating Kafka for event-driven architecture, and working with SQL,
PostgreSQL, MongoDB, and DynamoDB for data management. I also leveraged
AWS services to ensure scalability and reliability, implemented authentication and
authorization mechanisms with JWT and OAuth, and managed infrastructure
automation using Docker and Ansible.

In addition to core platform development, I was actively involved in implementing key
fintech functionalities, such as:
●​ User account management, including creating user accounts and defining
account types & permissions.
●​ Secure authentication and authorization, including generating access tokens
and integrating OAuth.
●​ Fraud prevention and risk assessment, leveraging data analytics and
automated checks to enhance security.
●​ Transaction processing and payment flows, ensuring seamless onboarding
and underwriting while mitigating merchant-of-record liability.

Arcadia Systems | July 2023 - Oct 2023

Full-Stack Developer

I played a key role in developing a high-performance API designed to power an interactive
gaming platform, integrating backend scalability with an engaging frontend experience. This
project combined Node.js, data management with MongoDB, and Docker Compose
orchestration.

I was involved in writing the frontend in React, leveraging a canvas-based animation engine
to deliver real-time, visually rich game mechanics. Additionally, I worked on optimizing
Node.js processes, focusing on game logic execution, transaction flows, and event-driven
state management, ensuring a seamless user experience.

●​ MongoDB-driven data storage – designed and optimized schemas for high-speed
data retrieval
●​ JWT-based authentication & security – implemented robust user authentication and
authorization flows.
●​ Canvas-powered animations – built visually engaging slot mechanics with smooth,
real-time interactions.
●​ API documentation with Swagger – thoroughly documented RESTful endpoints to
ensure clear and efficient integration for developers.

Languages
English - Upper-Intermidiate​
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Ukrainian - Native​
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Russian - Second native
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Slovak - Intermidiate