Руслан

Tsimko Ruslan
Full-Stack Developer
- developer with hands-on experience building modern web
applications and strong communication, teamwork, and
problem-solving skills.
Experience

Contact
Designing and delivering scalable, high-performance
Telegram, Viber web applications using Node.js (NestJS, Express) on
@tsimkoruslan
the backend and React / Next.js on the frontend.
+098-12-65-818
Experienced in building robust REST APIs,
Email
[open contact info](look above in the "contact info" section) implementing authentication and authorization
systems, and ensuring secure and efficient data flow
Address
Lviv Oblast between services.
Lviv

GitHub Skilled in state management, routing, server-side
snoopy-developer
rendering (SSR), API design, authentication, testing,
and performance optimization, while leveraging
Education
modern libraries and frameworks depending on
2017 - 2021
project requirements. Comfortable working with
Lviv National Academy of Arts component-based architecture, reusable UI patterns,
Faculty of Fine Arts and Restoration and responsive design principles to deliver high-
quality user experiences.
2021
Octen WEB University
Experienced in end-to-end feature development,
from planning and architecture to implementation
and deployment. Able to seamlessly integrate
Commercial frontend and backend systems, maintain clean and
experience scalable codebases, and follow best practices in code
quality, maintainability, and software architecture.
Front - 1 year
Full-stack - 3 years Strong focus on collaboration, problem-solving, and
effective communication within cross-functional
teams, contributing to efficient development
Language
processes and reliable product delivery.
Ukrainian - native

English: Pre-Intermediate
(reading technical
documentation)

Hackney Games

Specialized in developing Telegram mini-apps for the crypto market,
NFT games, and similar products, including KOKORONOKI, NOTGRAM,
HEDGEHOG, TOKENVOLLEY, TAPCITY, ALICE & BOB, and others.
Worked in a small development team (3–4 members) alongside a
designer and additional contributors when required.
Delivered end-to-end functionality, developing backend services with
Node.js (NestJS, Express) and frontend applications using React /
Next.js / Phaser, integrating with crypto and NFT APIs.
Implemented secure authentication, user wallets, token transactions,
leaderboards, and real-time user interactions to support engaging
user experiences.
Focused on clean architecture, code quality, and stable release
processes, contributing to the reliability and scalability of the
products.

GameTree

Joined GameTree as a developer and contributed to improving the
product’s architecture, performance, and maintainability.
Participated in revamping and optimizing the application, helping
enhance system structure and overall performance.
Delivered end-to-end improvements, working on backend services
with Node.js (Express) and frontend applications using React Native /
Next.js, ensuring seamless integration and stable operation.
Collaborated with the development team on feature implementation,
code reviews, and development processes, contributing to reliable
delivery aligned with product requirements.
Contributed to improving architecture, testing practices, and
deployment processes, helping increase the stability and scalability of
the platform.

CozyUp

Developed CozuUp, a web platform for managing personal apartments
and rental operations.
Delivered end-to-end functionality, building backend services with
NestJS and the frontend with React, ensuring seamless integration
between system components.
Implemented key property management features, including
apartment listings, booking management, user authentication, and
payment processing.
Improved workflow and UI/UX for landlords and tenants, focusing on
creating an intuitive and reliable user experience.
Maintained code quality, system architecture, and testing practices,
ensuring scalability and stable operation as the user base grew.

DJ booking platform (similar to GigSalad / Cueup)

Developed a DJ booking platform that allows users to submit requests
to hire DJs for events, while DJs can bid for the opportunity to perform
using a booking-auction model.
Built end-to-end functionality, using Supabase for backend services
and React for the frontend, ensuring smooth integration between
system components.
Implemented core features including event request submission, DJ
bidding system, secure authentication, and real-time updates.
Focused on scalable architecture, clean and maintainable code, and
intuitive UX/UI, providing a seamless experience for both event
organizers and DJs.

I’ve contributed to many other projects, and I’d be glad to
share more about my role and impact in a conversation.