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I’m a Senior Frontend Engineer with 6+ years of experience building production web applications using React and TypeScript. I focus on maintainable UI, complex business logic, performance, and frontend ownership—working across payment platforms, e-commerce, and iGaming to deliver reliable user-facing features and smooth integrations. I also bring strong quality discipline from 3 years of prior QA engineering experience, and I enjoy guiding teams through code reviews and mentoring. Recently, I’ve been developing a full-featured Next.js application with authentication and transaction management, using modern tooling (including AI-assisted development) to move faster while keeping architecture clean and scalable.…I’m a Senior Frontend Engineer with 6+ years of experience building production web applications using React and TypeScript. I focus on maintainable UI, complex business logic, performance, and frontend ownership—working across payment platforms, e-commerce, and iGaming to deliver reliable user-facing features and smooth integrations. I also bring strong quality discipline from 3 years of prior QA engineering experience, and I enjoy guiding teams through code reviews and mentoring. Recently, I’ve been developing a full-featured Next.js application with authentication and transaction management, using modern tooling (including AI-assisted development) to move faster while keeping architecture clean and scalable.

Mike Petrusenko

Front-End Developer, Web Developer, Software Engineer, +2

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I’m a Senior Frontend Engineer with 6+ years of experience building production web applications using React and TypeScript. I focus on maintainable UI, complex business logic, performance, and frontend ownership—working across payment platforms, e-commerce, and iGaming to deliver reliable user-facing features and smooth integrations. I also bring strong quality discipline from 3 years of prior QA engineering experience, and I enjoy guiding teams through code reviews and mentoring. Recently, I’ve been developing a full-featured Next.js application with authentication and transaction management, using modern tooling (including AI-assisted development) to move faster while keeping architecture clean and scalable.…I’m a Senior Frontend Engineer with 6+ years of experience building production web applications using React and TypeScript. I focus on maintainable UI, complex business logic, performance, and frontend ownership—working across payment platforms, e-commerce, and iGaming to deliver reliable user-facing features and smooth integrations. I also bring strong quality discipline from 3 years of prior QA engineering experience, and I enjoy guiding teams through code reviews and mentoring. Recently, I’ve been developing a full-featured Next.js application with authentication and transaction management, using modern tooling (including AI-assisted development) to move faster while keeping architecture clean and scalable.

Available to hire

I’m a Senior Frontend Engineer with 6+ years of experience building production web applications using React and TypeScript. I focus on maintainable UI, complex business logic, performance, and frontend ownership—working across payment platforms, e-commerce, and iGaming to deliver reliable user-facing features and smooth integrations.

I also bring strong quality discipline from 3 years of prior QA engineering experience, and I enjoy guiding teams through code reviews and mentoring. Recently, I’ve been developing a full-featured Next.js application with authentication and transaction management, using modern tooling (including AI-assisted development) to move faster while keeping architecture clean and scalable.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Ukrainian

Fluent

Russian

Fluent

English

Advanced

Work Experience

Senior Frontend Engineer at Self-employed (Independent)

September 1, 2025 - Present

Developing a full-featured Next.js application using React and TypeScript. Implementing authentication and transaction management with server-side sorting, pagination, and filtering. Using AI-assisted development tools to speed up implementation, explore unfamiliar patterns, and improve modern frontend architecture practices.

Senior Frontend Developer at Transact First

September 1, 2023 - September 1, 2025

Owned frontend development and delivery of a production payment processing platform. Built and maintained payment-related features and user-facing functionality. Coordinated work with another developer, distributed tasks, provided technical guidance, and conducted code reviews. Designed frontend architecture and contributed to system design decisions in collaboration with the CTO. Integrated external services and supported production rollouts. Developed and maintained a reusable JavaScript SDK used by third-party merchants.

Senior Frontend Developer at Evenmore

March 1, 2022 - July 1, 2023

Redesigned frontend components and delivered new features for a high-load online betting platform. Worked with complex betting flows, odds-related functionality, and interactive UI. Participated in code reviews and provided technical guidance to less experienced developers. Improved Lighthouse performance scores by 35–40 points through refactoring, dependency cleanup, and frontend optimization. Contributed to modernization and redesign of core components and user flows.

Frontend Developer at Transact First

April 1, 2021 - February 1, 2022

Built frontend applications from scratch for User, Customer, and Vendor interfaces. Designed and implemented an admin dashboard and a reusable JavaScript SDK for third-party merchant integrations. Integrated external services and implemented customer support functionality. Contributed to frontend architecture and established reusable components for the platform.

Frontend Developer at OSDB

November 1, 2020 - April 1, 2021

Built a React medical eCommerce application from scratch. Implemented routing, data handling, reusable UI components, and responsive interfaces. Developed automated frontend tests.

Frontend Developer at Evenmore

May 1, 2019 - November 1, 2020

Developed API-driven frontend modules, UI rendering, and application logic for a movie marketplace. Contributed to React migration and implemented React Hooks and reusable components.

Frontend Developer at Under NDA

April 1, 2018 - May 1, 2019

Developed dashboard features and integrated REST APIs on an e-banking platform. Built frontend functionality using React and TypeScript and collaborated across the delivery lifecycle.