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Experience

Backend developer (Learn Japanese)
06.2025 - today
A language learning application designed for users studying
Japanese, leveraging various associations (e.g., auditory or visual
illustrations) to simplify language acquisition.

Responsibilities:

Mykhailychenko Maintained and extended backend logic
Designed and implemented new microservices
Yaroslav Integrated external APIs and Excel-based data sources for
dynamic content delivery.
Developed database structure using PostgreSQL + TypeORM
Built and maintained RabbitMQ messaging workflows for
Backend Developer handling asynchronous tasks and real-time updates.

Stack: Express (custom framework), Excel (API integration table),

Contact PostgreSQL, TypeORM, RabbitMQ

Backend developer (Trazet)
+38(066)2622603 01.2025 - 05.2025 (4 months)

A platform designed for real-time vehicle and device tracking, data
[открыть контакты](см. выше в блоке «контактная информация») collection via the Traccar API. Contributed to backend development
by designing and implementing APIs, integrating geolocation
t.me/utilc services, and improving logistics efficiency through real-time
tracking, fuel consumption monitoring, and speed analysis.

Education Responsibilities:
Designed and implemented REST APIs to support core logistics
features.
Zaporizhzhia National University, Developed database structure using Prisma + PostgreSQL,
ensuring scalability and performance.
software engineering
Integrated external services, including Traccar (for geolocation)
and Odoo (for business workflows).

Skills Built a scalable RabbitMQ messaging system for handling device
updates and real-time data streams.
Implemented CI/CD pipelines using Docker and GitLab Actions.
NodeJS (Nest.JS, Hapi, Express) Maintained and extended API documentation with Swagger for
developer usability.
PostgreSQL, MongoDB Contributed to backend infrastructure for real-time tracking and
analytics.
Sequelize, TypeORM, Prisma
Stack: NestJS, Prisma, PostgreSQL, RabbitMQ, Socket.io, Docker,
Redis
GitLab CI/CD, Swagger, Traccar, Odoo

FireBase

MinIO

Integration (Traccar, Odoo)

Docker

CI/CD

Rest API/gRPC/WebSocket

React

Redux

Microservices
 Experience

FullStack Developer (Raider.IO)
08.2024 - 01.2025 (5 months)

A large-scale project dedicated to World of Warcraft, involving various technologies and close cooperation between teams.
The goal of the project was to create a platform where players could find the best builds, event results, raid guides and other
game resources.

Responsibilities:
Adding new and expanding current admin panel capabilities.
Adding various cron tasks.
Optimizing database queries.
Built user interface components and layouts based on Figma designs.
Collaborated daily with developers and managers (regular calls for technical discussions and planning).

Stack: Hapi, Sequilize, PostgreSQL, React, Redux, Docker, Redis

Backend developer
04.2022-10.2022 (6 months)
Reverse engineering of a large marketplace to automate thousands of orders. Developed a full-cycle system: from user
registration and verification to automatic order processing, delivery tracking and processing of discounts/coupon offers.

Service for automation of the marketplace via HТТР АРІ. The essence was that the clients initially automated the
marketplace via the BAS/ZennoPoster browser automation systems, but it took a long time. The main task of the
application was to minimize the time spent on the following actions:
User registration;
Account authentication.
Changing account data.
Passing verification (mail/phone).
Filling the shopping cart.
Receiving information.
Searching for a list of discounted products.
Searching for a product by criteria.
Collecting order information.
Receiving information about the delivery status.
Collecting different discount coupons.

Responsibilities:
Developing a service from scratch.
Reverse engineering (intercepting requests, finding data generation points).
Working with the database (building tables, relationships).
Creating a proxy farm (3proxy) using modems and then creating an API for them.

Stack: Express.js, Request-promise, MongoDB, 3proxy.
 Experience

Backend developer
06.2023 - 11.2023 (5 months)

Reverse engineering of online casino API and development of a service for automatic bonus collection. Automation
included bypassing Cloudflare protection, passing ReCaptcha, collecting bonuses on a schedule, reporting on collected
bonuses and balance notifications in Telegram.

The main task of automation was:
Bypassing Cloudfare protection.
Collection of bonuses by time.
Passing ReCaptcha.
Reporting on collected bonuses for a period of time.
Notifications in Telegram about balance changes.

Responsibilities:
Developing a service from scratch.
Reverse engineering (intercepting requests).
Working with a database (creating tables, building relationships). Integrating services for passing captcha.

Stack: Express.js, MongoDB, Cron, Telegraf, Mutex, Worker