Олексій

Olexii Mormul
Front End Developer
Cherkasy, Ukraine · Primarily remote
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)| LinkedIn | GitHub | Telegram
Summary
Front End Developer with 8+ years of experience specializing in high-performance web applications using Angular
(14–18+), React, Next.js, TypeScript, and .NET/C#. Proficient in UI component systems (NG-ZORRO, PrimeNG,
MUI), API integration, and SQL performance tuning. Strong expertise in frontend architecture, modernizing legacy
systems, and optimizing full-stack data workflows.
Experience
REHAU | Senior Front-End Developer 07/2023 – 08/2026 Cherkasy, Ukraine
• Web code editor integration: Embedded and customized an in-browser code editor (Monaco Editor), adding
custom syntax highlighting and tooling actions — reduced developer configuration/onboarding time by ~25%.
• Component architecture & performance: Engineered reusable UI component libraries on NG-ZORRO and
PrimeNG shared across multiple internal applications; implemented Angular CDK virtual scrolling for large
datasets, cutting initial render time by ~40% and reducing memory usage by ~30%.
• Multi-framework tool development: Defined the architecture for internal tools spanning Angular 18+, React,
and Vue.js on a unified REST API data layer, and led code reviews across the team — reaching ~80% unit test
coverage and reducing post-release bug reports by ~20%.
ALIQUOT | Middle Full Stack Developer 07/2021 – 06/2023 Kyiv, Ukraine
• Legacy migration & modernization: Led the migration from AngularJS to Angular 16+ with zero downtime,
improving app load performance by ~35% and reducing new-feature delivery time by ~20%.
• Database performance tuning: Authored optimized SQL queries, stored procedures, and triggers, reducing overall
database load by 40%.
• Backend & API development: Designed and implemented RESTful Web APIs using .NET 6/C# 10 with EF Core,
cutting average API response time by ~25% and improving data-access reliability.
Luxoft | Junior Full Stack Developer 07/2018 – 07/2021 Kyiv, Ukraine
• Architecture refactoring: Reduced code duplication by 30% and improved maintainability by introducing
MediatR, AutoMapper, and FluentValidation patterns.
• Full-stack API integration: Delivered responsive UI features using PrimeNG, integrating secure RESTful
endpoints across Angular and .NET layers — reduced reported UI bugs by ~15%.
• Data access optimization: Optimized Entity Framework Core queries and SQL indexing, reducing average query
response time by ~30%.
Skills & Technologies
• Angular (14–18+), AngularJS, React, Next.js, Vue.js, TypeScript, JavaScript
• Redux, Redux Toolkit, RTK Query, GraphQL, PrimeNG, NG-ZORRO, MUI, Tailwind CSS, SCSS, HTML5, CSS3, BEM
• .NET Core / ASP.NET Core, C#, Entity Framework Core, MediatR, AutoMapper, FluentValidation, Serilog
• PostgreSQL, SQL Server, RESTful Web APIs, Swagger, Git, Figma, Jira, CI/CD, Agile/Scrum
Education
Taras Shevchenko National University of Kyiv — BSc & MSc in Computer Engineering (2016–2022)
Master's thesis is "Forecasting the number of visitors to a shopping center using regression models"
Languages
Ukrainian (Native)
English — B1, working with a tutor on conversational fluency; building vocabulary toward B2