Валерій

Valerii Oleksiienko
Frontend Developer
​ [відкрити контакти](див. вище в блоці «контактна інформація») ​ [відкрити контакти](див. вище в блоці «контактна інформація»)
​ https://akerman048.github.io/Portfolio/ ​ Reykjavik. Iceland

SUMMARY
Motivated Frontend Developer with 2+ years of hands-on experience in creating user-friendly, high-performance web applications. Proficient in React, TypeScript,
Next.js, Tailwind CSS, and modern front-end technologies. Strong team player with a proven ability to deliver real-world projects and a constant drive for learning and
professional growth.

LANGUAGES
English Ukrainian Spanish
Proficient Native Beginner

Polish Russian
Advanced Proficient

SKILLS
HTML CSS JavaScript React TypeScript Tailwind CSS Firebase Next.js APIs Bootstrap Redux A/B Testing

UX Design Landing Page Optimization Team Collaboration Git Sass Vite

EXPERIENCE
2025 - Present Frontend Developer
Reykjavík, Iceland
Self-Employed
Responsibilities & Achievements:
• Designed and developed multiple web applications using React, Next.js, and TypeScript, ensuring responsive and user-friendly interfaces.
• Built reusable UI components and implemented modern styling with Tailwind CSS, improving development speed and design consistency.
• Integrated Firebase for authentication, real-time database, and hosting, enabling secure and scalable applications.
• Managed source code with Git/GitHub, maintaining clean version control and effective collaboration workflows.
• Optimized website performance through code-splitting, server-side rendering, and SEO best practices.
• Delivered projects for different clients, from landing pages to dynamic web apps, meeting deadlines and client requirements.

2023 - 2025 Frontend Developer
Reykjavík, Iceland Ölgerðin
Responsibilities & Achievements:
• Built reusable and responsive UI components (buttons, sliders, modals, forms, cards).
• Developed interactive features using React (hooks, props, state management).
• Implemented adaptive layouts with HTML5, CSS3, Flexbox, and CSS Grid.
• Integrated JavaScript/TypeScript logic to handle user interactions and events.
• Consumed REST APIs with fetch/axios, rendered dynamic lists and event data.
• Configured client-side routing with React Router.
• Applied styling solutions (CSS Modules, Styled Components, Tailwind CSS, SCSS).

2021 - 2022 Marketing Assistant / Frontend Developer / Digital Marketing Specialist
Odesa, Ukraine
Tanita-Romario
Responsibilities & Achievements:
• Used JavaScript (ES6+) for form validation, DOM manipulation, and basic interactivity.
• Implemented responsive layouts from Figma/PSD designs using HTML5, CSS3 (Flexbox, Grid).
• Managed and optimized Facebook Ads and Google Ads campaigns with monthly budgets ranging from $10,000 to $20,000.
• Ensured cross-browser compatibility and mobile-first design.
• Created advertising reports and analytics dashboards to track performance, ROI, and conversion metrics.
• Developed and launched product landing pages, collaborating with designers and developers to ensure high-quality user experience.
• Designed ad creatives and copy that effectively attracted and engaged target audiences.
• Assisted in website development and marketing strategy execution to support overall business growth.
• Increased online sales revenue by 4x during tenure, with every fourth visitor clicking through paid advertising campaigns.

2020 - 2021 Media Buyer / Frontend Developer / Performance Marketing Specialist
Odesa, Ukraine
AcidBro
Responsibilities & Achievements:
• Collaborated on the development of mobile applications and landing pages, contributing to product growth and user acquisition.
• Implemented responsive layouts from Figma/PSD designs using HTML5, CSS3 (Flexbox, Grid).
• Built reusable UI elements such as buttons, navigation menus, sliders.
• Created and tested video and image ad creatives tailored to diverse target audiences and international markets.
• Conducted A/B testing of campaigns, targeting strategies, and creatives to identify the most profitable combinations.
• Scaled campaigns across global GEOs, adapting ad strategies to local markets and cultural specifics.
• Planned, launched, and optimized advertising campaigns across Unity Ads, Google Ads, and Facebook Ads with budgets up to $10,000.
• Achieved ROI up to 600%, significantly exceeding performance benchmarks.
EDUCATION
2014 - 2018 Professional qualification manager-administrator
Odesa I.I. Mechnikov National University
Odesa, Ukraine

CERTIFICATIONS
Understanding TypeScript — Instructor: Mastering React (2025)Instructor: Andrii
Maximilian Schwarzmüller Polishchuk
A very practical and comprehensive course that A detailed course geared toward developers with
covers everything from the basics to advanced prior experience in React, with a focus on advanced
concepts of TypeScript, with clear examples, guided patterns, performance, and best practices; not
exercises, and real-life projects to consolidate your recommended for beginners.
learning.