Oleksandr

Oleksandr Moskalenko
Front-End Developer (React, TypeScript)
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section)

Poltava, Ukraine [open contact info](look above in the "contact info" section)

github.com/oleksandrmoskalenko

Summary
Front-End Developer with 3+ years of commercial experience building B2B SaaS and marketplace applications
using React, Next.js, and TypeScript.
Focused on scalable UI architecture, performance optimisation, and complex data-driven interfaces (tables,
forms, dashboards).
Experienced in micro-frontend architecture (Nx), feature-flag-based development, and real-time applications.
Passionate about building maintainable and high-quality frontend solutions.

Professional Experience
Front-End Developer, Xedrum 07/2025 – Present
Developing scalable large-scale web applications within a micro-frontend
•

architecture (Nx monorepo)
Implementing UI refresh with feature flags, ensuring backward compatibility
•

across UI versions
Building complex data-driven UI (tables, forms, dashboards) with focus on
•

performance and UX
Collaborating with design, backend, and QA via CI/CD pipelines and code reviews
•

Refactoring legacy components into reusable, scalable solutions aligned with
•

design system

Front-End Developer, RHelpers 05/2023 – 06/2025
Delivered B2B SaaS and marketplace platforms with focus on scalability and
•

performance
Implemented multi-role dashboards and complex multi-step forms
•

Integrated client-side OCR (Tesseract.js) to automate data entry workflows
•

Collaborated with design and backend teams to deliver features for international
•

markets

Front-End Developer, Freelance 11/2022 – 04/2023
Developed responsive landing pages using React and modern web technologies
•

Implemented clean, maintainable UI following modern UX/UI standards
•

Optimised performance and accessibility for consistent user experience across
•

devices

Education
Front-End Development, Beetroot Academy 2021

Master of Secondary Education (Mathematics & Informatics), 2014 – 2019
Poltava V.G. Korolenko National Pedagogical University

Key Skills
React / Next.js TypeScript
React Query Material-UI / Tailwind CSS
i18next REST API
Zustand Redux Toolkit
CSS / SCSS / Sass Stripe.js
Tesseract.js Framer Motion
Responsive & Mobile-first Design Git / CI /CD
Performance Optimisation Nx / Monorepo

Languages
Ukrainian English
native B2+

Notable Projects
Enterprise Web App (NDA), UI Refresh
Implemented UI refresh of existing application, improving UX and consistency
•

Implemented feature-flag-based rollout across UI versions with backward compatibility
•

Refactored legacy UI into reusable components aligned with design system
•

Delivered incremental updates without breaking existing functionality
•

AgentX, Subscription Platform & Admin Dashboard
Developed multi-language platform with user/admin areas and role-based access
•

Built pricing module with complex data transformations
•

Implemented reusable UI and navigation with localisation support
•

Integrated React Query for caching, error handling, and data consistency
•

Collega, AI College Admissions Platform
Built real-time chat with SSE streaming for AI responses
•

Developed dynamic questionnaire system with WebSocket sync and conditional flows
•

Implemented advanced filtering with optimistic updates and URL-synced state
•

Designed API layer with token refresh, retry logic, and request deduplication
•

RHelpers, Remote Talent Marketplace
Implemented full site redesign and reusable UI kit, improving design consistency and development
•

efficiency
Built advanced catalogue with Redux-based filtering and memoisation, enhancing performance and
•

usability
Developed dynamic pricing calculator (custom hook) for complex business logic
•

Integrated Stripe for seamless interview booking experience
•

Fleetify, Car Subscription B2B Platform
Developed customisable dashboards with drag-and-drop widgets for flexible user workflows
•

Built multi-step car addition wizard with VIN autofill and OCR, reducing manual input
•

Optimised high-traffic mobile pages for better performance and UX
•

Implemented dashboard layout persistence via async API
•

Tech Stack
Front-End Languages
React, Next.js, Vite, Nx (Monorepo) TypeScript, JavaScript (ES2023)

State Management Styling
Redux Toolkit, React Query, Zustand Material-UI, Ant Design, Tailwind CSS, Sass/SCSS

Testing API & Integrations
Jest, React Testing Library, Cypress REST API, WebSockets, SSE, Stripe.js, Tesseract.js,
Strapi
DevOps
Git, Docker, CI/CD