Особисті дані приховані

Oleksii Taran Frontend Developer with 10+ years of total industry experience —
including 2+ years focused on React-based web development and a
strong foundation in software quality assurance. Specialises in
building modern, performant interfaces with React 19, Next.js 15,
CONTACT
and TypeScript. Proven ability to work across the full stack (mobile
with React Native, serverlessback-end) and to lead qualityinitiatives.
Thrives in Agile teams and brings a rare combination of developer
[відкрити контакти](див. вище в блоці «контактна інформація») craft and QA rigour.
[відкрити контакти](див. вище в блоці «контактна інформація»)

Dnipro, Ukraine Experience

EDUCATION
Freelance Frontend Developer
Master's Degree
Security Agency Platform — Full-Stack Web Application
National Mining University
Faculty of Information Technologies Architected a platform with Next.js 15 (App Router) and TypeScript - public-
facing site + restricted admin dashboard from a single codebase.
CORE SKILLS

Languages Built a custom CMS using Tiptap & Quill with advanced media embedding,
image resizing, and rich-text capabilities tailored to non-technical editors.

Implemented secure sessions via NextAuth + Bcrypt and hardened contact
forms with Google reCAPTCHA to eliminate spam.

Frameworks Managed serverless data layer with Vercel Postgres / Neon DB, end-to-end
type safety via Zod, and client-side state with Zustand.

Delivered real-time lead notifications through a Telegram Bot integration
(grammY) and optimized media delivery via Cloudinary.

Achieved top Lighthouse scores by applying Tailwind CSS 4, Headless UI,
State & Data
and semantic HTML with accessibility and SEO as first-class concerns.

Automotive IoT Application — React Native / BLE
Built a cross-platform mobile app with React Native + TypeScript to control
vehicle air suspension via Bluetooth Low Energy (BLE).
UI & Styling
Integrated react-native-ble-plx to handle real-time microcontroller
communication with per-wheel and axle-synchronized adjustment
modes.

Designed a real-time telemetry dashboard visualising BLE signal strength,
2023 – 2024

Testing battery voltage, and tank pressure using custom widgets.

Combined Redux for global state and TanStack Query to synchronise
hardware telemetry with the UI with minimal latency.
DevOps & Tools
Secured the control interface with Biometric Authentication to prevent
unauthorised vehicle modifications.

Front-End (React) Developer
Together Networks — Dating Platforms, Dnipro, Ukraine

Developed and maintained consumer dating platforms for international
markets in a large Agile team of 18+ engineers with rigorous multi-approval
PR reviews.
Led migration of legacy Backbone.js codebase to React, modernising
architecture with ES6+ patterns and React Portals to improve rendering
performance.

Implemented Apollo GraphQL + WebSockets for real-time chat and live
engagement features.

Championed adoption of React Testing Library, refactoring legacy Jest tests
and ensuring high coverage across BrowserStack device matrices.

Served as duty developer — triaging high-priority production issues
reported by QA and managing task flow in Jira.

Operated within a Docker / Linux / Jenkins CI/CD environment with Sentry
for production error monitoring.

Senior QA Automation Engineer
LeadsMarket.com — USA / Dnipro, Ukraine
Designed and developed a custom test automation framework from
scratch using C#, SpecFlow, and Entity Framework, streamlining testing for
the manual QA team.

Performed hybrid development and testing — active bug fixes in both
backend (C#) and frontend (JavaScript) codebases.

Developed comprehensive full-stack automation suites for frontend and
back-end systems using C# .NET.

Authored SQL migration scripts and managed automated test execution
across multiple browsers daily.

Collaborated closely with Business Analysts and Developers to troubleshoot
defects within Visual Studio Online and Jira.

Senior QA Automation Engineer & AQA Lead
BIFIT — Dnipro, Ukraine

Led a team of automation engineers, overseeing the testing strategy for
complex web and mobile applications.
Developed and maintained automated test frameworks for web apps and
REST APIs using Java, JUnit, and rest-assured.

Actively contributed to Android (Java) application development — bug
fixes and Google Analytics custom event tracking.

Managed build and CI pipelines with Maven, Gradle, Jenkins, and TeamCity.

Handled database testing and schema migrations via SQL, DBUnit, and
Liquibase.