Open to opportunities

Саша Кузьменко

@0002922

Message

Senior Frontend Engineer specializing in scalable React/TypeScript product platforms.

Ukraine

Message

What I'm looking for

I’m looking to build scalable, modular frontend platforms with product teams—owning architecture, experimentation, and performance. I want to ship high-quality React systems, mentor engineers, and turn UX ideas into measurable outcomes.

I’m a Senior Frontend Engineer (React / TypeScript) specializing in scalable frontend platforms and product-driven development. I focus on building modular React architectures—Nx monorepo, multi-SPA platforms, and shared component libraries—so teams can move faster with reliable UI foundations.

I work closely with product, design, and engineering to improve activation, engagement, and retention through experimentation-driven development and reliable frontend systems. I led architecture and development of a multi-SPA platform, and I’ve driven measurable outcomes like +46% document tool usage, +31% renewal success, and +65% choice visits.

I’m hands-on with performance and quality: caching and lazy loading, server-state optimization (reducing API calls by 20% and load time by 30%), Jest/React Testing Library with ~70% test coverage, and accessibility compliance (WCAG 2.1). I also led a team of 3 engineers with sprint planning, code reviews, mentoring, and CI/CD delivery pipelines.

Experience

Work history, roles, and key accomplishments

Senior Frontend Engineer

Airslate (US Legal)

Jan 2021 - Nov 2025 (4 years 10 months)

Led architecture and development of a multi-SPA frontend platform using React 18 and TypeScript, enabling modular Nx monorepo and shared UI component libraries. Delivered User Account 2.0 redesign and experiments that increased document tool usage by 46%, reduced in-account cancellations by 5%, and improved renewal success by 31%, while cutting API calls by 20% and load time by 30%.

React 18+TypeScript Component Libraries Tanstack Query Zustand

Middle Frontend Developer

Govitall

Jan 2018 - Jan 2021 (3 years)

Developed React-based web applications and marketing platforms focused on performance, analytics integration, and maintainable frontend architecture. Delivered SEO-optimized user interfaces and collaborated with product and marketing teams to improve user acquisition and engagement.

React Javascript (ES6)Performance Optimization Analytics SEO Cross Functional Collaboration Frontend Architecture

Frontend Developer

DocLab (doc.ua)

Jan 2017 - Jan 2018 (1 year)

Built dashboard interfaces and internal tools, including Angular-based analytics pages and AMP-optimized landing pages. Improved build processes and frontend performance across key product pages.

Angular AMP Dashboards HTML CSS JavaScript

Frontend Developer

VintageWebProduction

Jan 2016 - Jan 2017 (1 year)

Developed and maintained cross-browser HTML/CSS/JS sites with interactive features for moreinfo.ua and concord.ua. Focused on consistent frontend behavior across browsers and reliable delivery of interactive UI functionality.

HTML CSS JavaScript Frontend Maintenance UI Front End Maintenance