Yaroslav

Yaroslav Tsebro
Node.Js Backend Developer
[open contact info](look above in the "contact info" section) |
[open contact info](look above in the "contact info" section)
https://github.com/yaroslavTsebro | https://t.me/tsebro_yaroslav
Kharkiv, 62454, Ukraine|[open contact info](look above in the "contact info" section)

Node.js Developer with 2.5+ years of experience building scalable and secure backend solutions for fintech and
no-code platforms. Skilled in TypeScript, Node.js, and microservices with a strong foundation in CQRS, Clean
Architecture, and modern development tools. Known for designing impactful product features that
drive business results, including a +24% increase in average loan size and robust mobile app generation
engines.Experienced in implementing cryptographic hash functions and designing Provably Fair systems;
developed the “Crash” gambling game.

Work Experience
Finance Platform Dec 2024 - Present
Backend Developer | Remote
Description: The application is designed to give loans
Team: 3 BA, PM, 3 Frontend, 5 Backend (Node), 2 Devops, 2 Python.
My Role: Designing and implementing system components (also for CRM), working closely with QA and DevOps,
resolving bugs, and preparing technical documentation and TOR.

Redesigned the integration system with the debt collection agency to ensure that only safe and permitted data is
transmitted.
Designed and launched a loan upsell system that increased the average loan size by 24%.
Led the architecture of a deferred notification system, enabling rejection messaging and partner promotion.
Created a modular, multi-stage internal status system that works with various entities and logical branching, using
Clean Architecture patterns and the State Machine design pattern
Integrated 2 PSP
No-Code Mobile App Constructor July 2023 - Dec 2024
Backend Developer | Remote

The application is designed to create Android and iOS mobile apps using a web constructor. The app
can work with APIs and local databases.

Built iOS code generation engine from scratch.
Developed secure content-sharing system using CQRS and caching
Implemented multi-layered validation using graph-based logic
Created a custom app versioning mechanism based on Flowers with key frames
Implemented AI Assintant for generation data for engines (Socket.io, OpenAI API)
Core Skills
Languages & Frameworks: TypeScript, Javascript, Solidity, Node.js, Feathers.js, NestJS, Express, GraphQL
(Apollo), React, Next.js, SwiftUI, Jetpack Compose, web3.js, NATS, FFmpeg, OpenCV, fluent-ffmpeg
Databases & ORMs: PostgreSQL, MongoDB, Sequelize, Prisma, Mongoose, TypeORM, Redis, ElasticSearch, Drizzle ORM

Architecture & Tools: Microservices, Monorepos, CQRS, Clean Architecture, Docker, GitHub Actions,
RabbitMQ, CI/CD, Jest, Supertest, Inversify, Kafka, RabbitMQ, Crypto Payments
Platforms & DevOps: Docker, Git, GitHub Actions, SSH, CI/CD

Other: HTML (BEM), CSS, SCSS, Android (Media3, Navigation Component), iOS (UIKit, Swinject)

Education
Kharkiv National University of Air Force Bachelor Software Engineering 2023 - 2025
Kharkiv Computer-Professional College Associate degreeSoftware Engineering 2019 - 2023

Languages
English (Upper-intermediate), Ukrainian (fluent)