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OLEG IVANCHENKO Kiev, Ukraine Upwork
BACKEND DEVELOPER LinkedIn

SKILLS
NodeJs AWS ExpressJs SequelizeOrm
PostgreSQL Docker NestJs TypeOrm
Solid Gitlab Actions MySql Kafka
Rest Swagger Microservices Redis

WORK EXPERIENCE
Springs
NodeJS Developer • 2021 - 2023
Studying Application (Education Platform)
Designed and implemented a robust PostgreSQL database for school entities, students, teachers, and skills, ensuring efficient data
management.
Developed an application to connect students and teachers, facilitating seamless communication, homework submission, reviews, and
diploma achievements.
Implemented a built-in calendar for effective schedule management of both students and teachers.
Fostered a collaborative learning environment through messaging features, enhancing the overall educational experience.

Cell Phone Top-Up Application
Spearheaded the development of a comprehensive application with a microservices architecture.
Engineered a user-friendly platform for mobile account top-ups, attracting aggregators and vendors to establish a widespread network of
mobile operators.
Demonstrated proficiency in building scalable solutions to accommodate the dynamic needs of the telecommunications industry.

Time Tracker CRM Application
Developed an advanced CRM application focusing on ticketing tasks and efficient time tracking.
Implemented a logical framework for task and project overtracking, optimizing workflow efficiency.
Showcased expertise in creating a user-centric solution for seamless task management and time monitoring.

Cashback Reward System Application
Created a user-friendly cashback application for rewarding customer purchases.
Developed a simple yet effective reward system based on transaction history and user preferences.
Implemented basic features to enhance user engagement and streamline the cashback experience.
.
Client Proposal Generator
Developed a user-friendly application for creating project proposals tailored for clients seeking web application development.
Implemented dynamic form functionalities to customize project details, timelines, and cost estimates.
Integrated a sleek interface for easy navigation, enhancing the overall proposal creation experience.

LeverX
NodeJS Trainee • 2021

Museum Art Showcase Application
Engineered a straightforward application for museums to showcase and demonstrate their art collection digitally.
Implemented a backend architecture supporting efficient data retrieval and seamless integration for a user-friendly exploration of
artworks.
Integrated features for adding artist details, descriptions, and audio guides for a rich visitor experience.