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Yaroslav Tsebro — Node.js backend developer · 3+ years · Kyiv, remote · open to offers

UNIT 01 · NODE.JS BACKEND · KYIV / REMOTE

Yaroslav Tsebro

Backend developer: 3+ years of Node.js and TypeScript, mostly in fintech. I led a KYC verification service, built lending features that raised the average loan by 24%, and worked on a credit decisioning platform with AI.

DIRECTIVE AVAILABLE

Open to offers. Locked on.

Subject
Yaroslav Tsebro
Role
Node.js backend developer fullstack when needed
Experience
3+ years commercial since Jul 2023
Base
Kyiv, Ukraine remote
English
Upper-intermediate
Status
Open to offers
Establish contact @tsebro_yaroslav · Telegram Download CV · PDF

02 · MISSION FILES · DECLASSIFIED

Work experience

Two companies, four products since July 2023. One card each — the full file is one click away.

  1. DEC 2024 → NOW

    Finsfera

    Fintech / lending platform · Fullstack Developer · Remote

    MF-01

    AutoKYC

    Checks a document photo and a selfie, then confirms the person or sends the case to a human.

    Fullstack Lead · team of 5

    ~96%of applications decided without an operator

    • Built the core verification flow from scratch, for documents from 60+ countries.
    • Screening against 10+ sanctions and wanted lists, whatever the spelling of a name.

    Built with NestJS · PostgreSQL · BullMQ · AWS Rekognition / Textract · OpenPGP

    Open mission file

    MF-02

    Lending platform

    Finsfera's core lending product and its CRM.

    Fullstack · team of 16

    +24%

    average loan size, after the loan upsell system he designed and launched

    • A status system that moves records through multi-step flows (a state machine).
    • A debt-collection integration that shares only the data the agency may see.

    Built with Node.js · State Machine · Clean Architecture · 2 payment providers

    Open mission file

    MF-03

    Credit & Risk

    Gives lenders an explainable approve / review / decline, from bureau, income, banking and KYC data.

    Fullstack · team of 6

    13microservices in the platform

    5data providers, one format

    • A decision engine that sends doubtful applications to a person, never to auto-approval.
    • An LLM gateway (Claude, OpenAI, Ollama) with fallback and cost limits.

    Built with NestJS · Kafka · pgvector · gRPC · Claude API

    Open mission file

  2. JUL 2023 → DEC 2024

    Octy

    No-code mobile app builder · Fullstack Developer · Remote

    MF-04

    Octy

    A web builder where people make Android and iOS apps without code.

    Fullstack · Node.js backend

    iOS enginecode generation built from scratch: a project from the builder becomes a real iOS app

    • Multi-layer validation based on graph logic, so errors in a project are caught early.
    • An AI assistant that generates data for the app engines (OpenAI API).

    Built with Node.js · Socket.io · OpenAI API · CQRS

    Open mission file

03 · REACTOR CORE · ONLINE

Skills

The four systems I build with every day. Tap the core for every other tool.

Frameworks

  • Express
  • Feathers.js
  • AdonisJS
  • GraphQL (Apollo)
  • Socket.io
  • Python (FastAPI)

Web & automation

  • JavaScript
  • Angular (RxJS)
  • Next.js
  • HTML / SCSS (BEM)
  • n8n
  • Cron

Web3

  • Solidity
  • Hardhat
  • OpenZeppelin
  • web3.js
  • Ganache

Data tools

  • Elasticsearch
  • Prisma
  • TypeORM
  • Sequelize
  • Mongoose

Documents & media

  • Tesseract.js (OCR)
  • ZXing
  • pdf.js
  • sharp
  • ffmpeg

Architecture

  • Microservices
  • Clean Architecture
  • CQRS
  • Saga
  • transactional outbox
  • State Machine

Testing & docs

  • Jest
  • Supertest
  • Testcontainers
  • Swagger / OpenAPI

DevOps & security

  • ECS/EKS
  • GitHub Actions
  • CI/CD
  • OpenPGP encryption
  • signed API requests and webhooks
  • rate limiting

AI & vision

  • RAG
  • hybrid search
  • Ollama
  • Rekognition
  • Textract
  • Azure Computer Vision

AWS

  • S3
  • EC2
  • IAM
  • API Gateway
  • RDS
  • DynamoDB

04 · FACTORY SETTINGS

Education

Six years of software engineering on paper: college first, then university.

  1. 2019 – 2023

    Kharkiv Computer-Professional College

    Associate degree · Software Engineering

  2. 2023 – 2025

    Kharkiv National University of Air Force

    Bachelor's · Software Engineering

Languages English — Upper-Intermediate Ukrainian — Fluent

05 · VISITOR LOG

Human contacts logged

The machine keeps a log of every human who stopped by. Leave a line — a hello, a job, a joke.

    06 · STATUS: OPEN TO OFFERS

    Establish contact

    Response time: human.