Open to opportunities

Виталий Олейник

@0008902

Message

Fullstack JavaScript Engineer at iContext LLC building B2B document, finance, and partner workflows.

Belarus

Message

At iContext LLC, I own end-to-end delivery of features across document and contract flows, finances, transfers, invoices, and partner workflows. I build TypeScript and React interfaces and work across API contracts and backend-facing flows.

Previously, I developed NestJS services and Kafka notification flows at T-Bank, and delivered React interfaces and Node.js APIs at Godel Technologies. At Wargaming, I developed an internal rule-management product with React, MobX, MST, and TypeScript.

Experience

Work history, roles, and key accomplishments

Current

Frontend / Fullstack JavaScript Developer

Current

iContext LLC

Dec 2024 - Present (1 year 11 months)

Own end-to-end delivery of business features across document/contract flows, finances, transfers, invoices and partner workflows in internal B2B products. Build TypeScript/React interfaces with advanced filters, forms, server pagination, sorting, loading/error states and REST API integrations.

TypeScript React REST APIs MUI Storybook Feature Sliced Design

Backend JavaScript Developer

T-Bank

Apr 2024 - Nov 2024 (7 months)

Developed internal REST APIs and backend services with NestJS and TypeScript for admin, support and tester workflows. Built Kafka-based notification flows and worked with DTOs, validation, service-layer business logic and module boundaries.

NestJS TypeScript REST APIs Kafka DTO Validation

Fullstack JavaScript Developer

Godel Technologies

Jul 2022 - Jan 2024 (1 year 6 months)

Delivered React/TypeScript interfaces and Node.js APIs for production business applications, including dashboards, authentication and API-driven workflows. Built OAuth/JWT authentication and RBAC; optimized backend APIs by ~30% and worked with AWS-based infrastructure.

React TypeScript NodeJS OAuth JWT RBAC AWS

Frontend Developer

Wargaming

Jan 2021 - Aug 2022 (1 year 7 months)

Developed an internal rule-management product with React, MobX, MST and TypeScript for complex operational workflows. Implemented rule versioning, import/export, behavior preview and data-driven UI states.

React MobX MST TypeScript