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Frontend Engineer with 6 years of experience building React and TypeScript applications for SaaS and commercial web platforms. Skilled in frontend architecture, complex user workflows, and performance optimization across large, multi-tenant products. I collaborate closely with backend engineers, designers, and product teams to deliver production-ready features, improve maintainability, and raise quality through testing, code reviews, and pragmatic technical proposals.…Frontend Engineer with 6 years of experience building React and TypeScript applications for SaaS and commercial web platforms. Skilled in frontend architecture, complex user workflows, and performance optimization across large, multi-tenant products. I collaborate closely with backend engineers, designers, and product teams to deliver production-ready features, improve maintainability, and raise quality through testing, code reviews, and pragmatic technical proposals.

Valentyn Zamiliukhin

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

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Frontend Engineer with 6 years of experience building React and TypeScript applications for SaaS and commercial web platforms. Skilled in frontend architecture, complex user workflows, and performance optimization across large, multi-tenant products. I collaborate closely with backend engineers, designers, and product teams to deliver production-ready features, improve maintainability, and raise quality through testing, code reviews, and pragmatic technical proposals.…Frontend Engineer with 6 years of experience building React and TypeScript applications for SaaS and commercial web platforms. Skilled in frontend architecture, complex user workflows, and performance optimization across large, multi-tenant products. I collaborate closely with backend engineers, designers, and product teams to deliver production-ready features, improve maintainability, and raise quality through testing, code reviews, and pragmatic technical proposals.

Available to hire

Frontend Engineer with 6 years of experience building React and TypeScript applications for SaaS and commercial web platforms. Skilled in frontend architecture, complex user workflows, and performance optimization across large, multi-tenant products.

I collaborate closely with backend engineers, designers, and product teams to deliver production-ready features, improve maintainability, and raise quality through testing, code reviews, and pragmatic technical proposals.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Intermediate

Polish

Fluent

Work Experience

Frontend Developer at KODO Labs

June 1, 2023 - June 1, 2026

Developed a multi-tenant SaaS frontend platform for workplace compliance and case management, delivering product features from requirements refinement with backend engineers through production deployment. Built an organization-aware architecture supporting multiple organizations with organization-specific configuration, SSO integrations, feature flags, and independent application settings while keeping shared functionality maintainable. Implemented authentication, role-based access control (RBAC), and routing for multiple applications (Reporter, Manager, Partner, Admin) with isolated sessions and permission-driven business workflows. Identified maintainability issues due to duplicated role-specific logic and proposed migration to a Feature-Sliced Design architecture. Improved rendering and bundle loading and optimized for Core Web Vitals, achieving Lighthouse performance around 93. Owned long-term frontend quality, architecture discussions, code review standards, and maintainability a

Frontend Developer at SutoSoft

June 1, 2020 - May 1, 2023

Built React applications integrated with Laravel backends for international clients, supporting customer-facing e-commerce features, internal dashboards, and content-driven websites. Worked on projects serving ~5,000 daily visitors, improving performance, usability, and maintainability as products evolved. Translated Figma designs into responsive, pixel-perfect interfaces using a mobile-first approach. Optimized business-critical pages to improve Lighthouse Performance (95+) and SEO visibility (100). Contributed to refactoring efforts by reducing duplication and introducing reusable patterns. Wrote and maintained unit tests for React components to improve reliability and prevent regressions.