Serhii Resnianskyi
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About Me

A passionate developer with a focus on creating beautiful, functional, and user-friendly applications.

Frontend Expert

7+ years of experience with React and Vue ecosystems.

Performance Focus

Building fast, responsive, and scalable applications.

Team Player

Strong communication and collaboration skills.

Problem Solver

Architecting efficient and maintainable solutions.

Who I Am

Experienced Software Engineer with 7+ years architecting scalable web solutions and leading technical decision-making in complex environments. Expert in React and Vue ecosystems with deep focus on performance optimization and system architecture. Proven ability to drive platform modernization, reduce technical debt, and collaborate across design and product teams to deliver user-focused solutions that improve developer productivity and business outcomes.

My Skills

Frontend Development

JavaScript (ES6+)TypeScriptHTML5CSS3/SCSS/BEMReactRedux (RTK)Vue.js 2/3PiniaVue RouterZustandTanStack (Query, Router, Store)

Backend Development

Node.js (Hono, Express, NestJS)BunPHP (Laravel)Python (FastAPI, Django, Flask)

Full-Stack Frameworks

TanStack StartNext.jsNuxt

UI Libraries & Design

Material UITailwindCSSShadcn/UIChakra UINuxt UI

Build Tools

WebpackVitenpm/yarn

Testing

EnzymeJest

Databases

PostgreSQLMySQLSQLiteIndexedDBRedis

DevOps & Tools

GitLinuxNginxApache HTTPDocker (basic)

Cloud & Infrastructure

VercelNetlifyAmazon Web Services (EC2, S3)Cloudflare (D1, R2, KV, DNS, CDN)

Professional Tools

FigmaAdobe PhotoshopJetBrains IDEsJiraConfluenceNotionSlackPostmanInsomniaYaakTablePluspgAdmin

AI & ML

Ollama (self-hosted models)ChatGPT/ClaudeOpenRouterStable Diffusion 1.6 (LoRA, upscalers, VAE)Prompt EngineeringAI-powered development workflows

Experience

Middle Software Engineer (Web & Mobile)

LeverX, Kyiv

Oct 2021 – Dec 2024 (3 years, 2 months)

  • • Researched and delivered proof-of-concept offline-first architecture using IndexedDB, enabling critical functionality during network outages and informing long-term technical strategy
  • • Led performance optimization initiative for data visualization components, collaborating across design and product teams to deliver 50% rendering improvements through strategic technical analysis and cross-functional alignment
  • • Drove standardization of core table architecture, eliminating performance bottlenecks and establishing reusable patterns that accelerated team velocity and improved developer productivity across multiple product areas
  • • Spearheaded platform modernization efforts including Webpack-to-Vite migration (achieving 60% build time reduction), React/Material UI framework upgrades, and Vue 2-to-3 architectural transition, ensuring technical debt reduction and developer experience improvements
  • • Designed and implemented client-side data processing solution, enabling advanced filtering and pagination capabilities for locally cached data and reducing dependency on server-side operations
ReactReduxSCSSMaterial UIVue 2VuexVue 3TypeScriptPiniaNuxt 3RESTful APIsCI/CD pipelineGitHubGitHub ActionsAWSAzure DevOpsAzure Blob Storage

Client projects completed under confidentiality agreements

Software Engineer

PJSC Chernihivoblenergo

Dec 2018 – Sep 2021 (2 years, 9 months)

Architected and delivered web platform for regional electrical distribution company, supporting critical business operations including HR management, asset inventory, and service coordination. Developed full-stack solutions using Laravel and Vue 2 that enabled efficient management of infrastructure serving residential and commercial customers across Chernihiv region.

LaravelVue 2PostgreSQLMySQL

Web Developer

Freelance

Jan 2017 – Aug 2018 (1 year, 8 months)

Delivered frontend solutions across diverse client projects, focusing on user experience optimization and responsive interface design.

HTML/CSSJavaScriptjQueryVue 2

Education

Bachelor's Degree in Mathematical Modeling and Cybersecurity

2017 - 2021

Chernihiv Polytechnic National University, Ukraine

MOOC & Certifications

Bare Metal JavaScript: The JavaScript Virtual Machine

Miško Hevery, FrontendMastersAug 2025

The Last Algorithms Course You'll Need

Michael Paulson, FrontendMastersAug 2025

Animations on the Web

Emil KowalskiFeb 2025

© 2025 Serhii Resnianskyi. All rights reserved.

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