Олександр

OLEKSANDR ZABURIANNYI Front-end Engineer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Chernivtsi, Ukraine LinkedIn

SUMMARY

Front-end Engineer with 2+ years of commercial experience, progressing from a transportation management system for
North America's leading school bus operator to sole ownership of a fintech front end for one of Africa's largest banks. Turn
operational complexity into interfaces that make the underlying work obvious. Establish automated CI quality gates and
high test coverage in the release process. Work closely with backend, product and design, resolving structural questions
before they harden into debt.

EMPLOYMENT HISTORY

Front-end Engineer, Yalantis 04/2026 – Present
Sole front-end developer on an operational planning platform for one of Africa's largest
• Remote
banks, owning architecture, implementation, testing and release.
Built a schema-driven form builder enabling business users to compose and configure multi-
•

step forms with validation rules, removing developer involvement from routine form
changes.
Delivered a collaborative document editor on Lexical with user mentions, edit locking,
•

version history and PDF export.
Implemented role-based access control with Okta and CASL, enforcing per-resource
•

permissions across routes and actions from a single source of truth.
Raised unit test coverage by 18 percentage points behind automated CI quality gates,
•

establishing the testing approach for a codebase with no existing suite.

Front-end Engineer, N-iX 07/2024 – 04/2026
Delivered the front-end of a transportation management system for North America's leading
• Remote
school bus operator, powering 2,000+ daily routes across 1,000+ districts.
Built a scheduling and route optimization interface with multi-stop routing, time constraints,
•

driver availability matching, vehicle capacity allocation, and employee workload tracking.
Engineered a data-intensive operations interface with real-time GPS tracking, 10K+ record
•

grids, complex custom filtering, multi-level sorting, and inline editing with optimistic
updates.
Improved load time by 12.4% through efficient data fetching, memoization, and caching.
•

Increased unit test coverage from 68% to 81% for critical workflows and edge cases.
•

Led sprint planning and retrospectives, proposing architectural improvements that reduced
•

bugs by 15%.

SKILLS

Front-end: React, TypeScript, JavaScript (ES6+), Next.js, TanStack Query, TanStack Table, Zustand, Redux, Zod, React
Hook Form, AG-Grid, Lexical, Okta, CASL, MUI, Tailwind, Ant-Design, SCSS/SASS, HTML5, CSS3, Vite, Webpack
Back-end: Node.js, Express.js, Nest.js, MongoDB, Mongoose ODM, SQL, PostgreSQL, REST, GraphQL
Testing: Jest, Vitest, React Testing Library, Playwright, MSW
Other: Git, GitHub, Claude Code, Cursor, AWS CodeCommit, AWS CodeBuild, AWS CodePipeline

LANGUAGES

Ukrainian English
Native (C2) Upper-Intermediate (B2)

EDUCATION

Bachelor's in Computer Science, Chernivtsi National University