Денис

Denys Omelchenko
NODE.JS,FULLSTACK
DEVELOPER
ABOUT ME
I am a result-oriented programmer with excellent
communication skills and a deep understanding of web
development. I love to develop, constantly improve
my skills, am ready to learn new things, have
extensive knowledge of pure JavaScript and want to
improve its frameworks and libraries. I am currently
constantly developing and hope to work with you,
having proven through hard work. I take pride in
staying updated with the latest trends and
technologies in web development, always striving for
efficient, clean, and scalable code. I am
comfortable working both independently and in a
team, collaborating to bring innovative solutions to
life. My goal is to apply my expertise to build
user-centric applications while maintaining the
highest coding standards. I'm excited about
challenges and opportunities that help me grow
professionally while delivering impactful results
for the team or client.

CONTACT INFORMATION:
Experience working
Telephone: [open contact info](look above in the "contact info" section)
Email: [open contact info](look above in the "contact info" section) FULLSTACK DEVELOPER 10/2023 - 04/2024
Telegram: @Den44den Charity organization REMOTE
“Pomich 2022"
SKILLS
STACK:
Frontend: HTML, CSS, React.js,
Angular. Frontend: HTML, CSS, React.js
Backend: Node.js, NestJS, Express.js
Backend: Node.js, Mongo DB, MySQL, HT TP/HT TPS,
Express.js, JWT
Database:MySQL, PostgreSQL,
MongoDB, ClickHouse.
Creating a website for users that acts as an
Programming language: TypeScript, advertising brand for the company. Adding new
JavaScript. functional applications for communication clients.
Сreate a new website to attract new sponsors for
Data caching: Memcached.
future projects.
Analitics request: Postman, Grafana, Create a JWT authorization (React.js, Express.js,
Prometheus. Mongo DB).
Protocols: FTP, SSH, HT TP/HT TPS. Creating an API for a site means writing data to the
database and executing various GET, POST, PUT,
Tradingmarket protocol advertising: DELETE, PATCH requests.
Openrtb 2.5. C r e a t i n g a F u l l s t a c k We a t h e r A p p . I t s h o w s t h e u s e r
Storage of big data files: Amazon their location and the weather based on the region.
A global project for training on creating a Fullstack
S3.
application. Advanced JWT authorization, where the
Platform for building: Docker. user can recover the password if he wants to
Architecture project: Microservices, change it or has forgotten it, when he is logged in
Monolithic. he receives information and can order various
products such as sports nutrition, accessories and
Microservices: RabbitMQ, gRPC. clothing. The user can place an order by entering
Monolithic: REST API their data (for feedback).
Build and ship software: GitHub.
 EDUCATION NODE.JS DEVELOPER 06/2024 - 01/2025
BACHELOR 09/2019 - 08/2023
Poland company REMOTE
INFORMATION TECHNOLOGY programmatic advertising
PDAU “BidsCube”
STACK:
MASTER DEGREE 09/2023 - 08/2024
Backend: Node.js, ClickHouse, WebSocket, Memcached,
INFORMATION TECHNOLOGY MySQL, SSH, Amazon S3, HT TP/HT TPS, OpenRTB2.5,
PDAU WebSocket
Creating a backend application for OpenRTB 2.5.
Language: Connecting Prometheus and Grafana.
English: Intermediate Implementation of analysis of executed requests.
Exploring Amazon S3 large file storage and file
systems.
Creating an auction application for customer pricing
and storing data in MongoDB.
Big Data Recording in ClickHouse.
Exploring Prometheus with OpenRTB 2.5 Working
with subqueries in ClickHouse.
Study of DSP and SSP structure.
Development of supply management mechanisms in
programmatic advertising (rate adjustment).
Working with he with ClickHouse DB, which includes
four parthners + seller.json.
СТАРШИЙ Creating user statistics by ID in a selected date
АНАЛИТИК ДАННЫХ range, endpoints in MySQL and ClickHouse.
Query optimization in ClickHouse (indexes,
Образование
Студия «Луна» |
Апрель 2017 - май
partitioning).
2018 API protection and data security (rate limiting,
JWT).
Real-time data processing (WebSocket).
Memcached data caching

FULLSTACK DEVELOPER 01/2025 - UNTIL TODAY
Poland company
programmatic advertising
REMOTE
“BidsCube”
STACK:
NestJS, Angular, PostgreSQL, WebSocket, HT TP/HT TPS,
WebSocket, TypeORM, TypeScript
Fixes and creation of new features for companies (using
Nest.js and Angular).
Using TypeORM for database work.
Fixed structure request posts for different companies.
Working with DTO design patterns.
Fix for the "Tasks" tab for companies that allows you to
create tasks based on the example (Trello)
Create feature translate language on five ES, UK, FR, RU, EN
Create microservice for LiveKit meetings through gRPC