Open to opportunities

Viktor Bošina

@viktorboina

Senior frontend engineer building banking-grade React/React Native/Next.js apps with performance and scalable architecture.

Brazil

Message

What I'm looking for

I’m looking for a role where I can own React/React Native/Next.js architecture, push performance-critical UI, and collaborate in agile teams—ideally building products with high reliability and strong engineering discipline.

I’m a Senior Frontend Engineer with 6 years building banking-grade mobile/web apps and performance-critical UIs in React Native and React. I’ve shipped core features in highly regulated enterprise environments serving 180,000+ customers, with a strong focus on component architecture and API integration.

Most recently, I founded and led BEINCLO s.r.o., architecting and operating a production Next.js clothing e-commerce platform end-to-end, including Stripe checkout, inventory management, a visual layout editor, and logistics-provider integrations. I chose a fully custom build over Shopify to control checkout, performance, and merchandising, and kept Lighthouse performance at or above 90 across the storefront.

Earlier, I led a React Native + TypeScript booking platform from zero to a funded MVP in ~10 months, setting architecture across navigation, state, and the API layer while mentoring junior developers to independent feature ownership. At Partners Bank, I improved key screen load time from 2.5s to 1.7s (30%), and extracted a typed, unit-tested UI component library that reduced UI regressions reaching QA by ~35%.

Experience

Work history, roles, and key accomplishments

Founder & Lead Engineer

BEINCLO s.r.o.

Jun 2025 - Mar 2026 (9 months)

Architected and operated a production Next.js clothing e-commerce platform solo, including storefront, Stripe checkout, inventory management, a visual layout editor, and logistics-provider integrations. Chose a fully custom build over Shopify to control checkout, performance, and merchandising end-to-end.

Next.js React Performance Optimization

Lead React Native Developer

Ignighted Holdings

Mar 2024 - May 2025 (1 year 2 months)

Led a 3-engineer frontend team building a React Native + TypeScript booking platform from zero to a funded MVP in ~10 months. Set the frontend architecture (navigation, state, API layer) and mentored junior developers to independently own feature delivery.

React Native TypeScript Frontend Architecture Navigation State Management API Integration Team Leadership Mentorship

React Native Developer

Partners Bank

Jan 2023 - Feb 2024 (1 year 1 month)

Shipped core features of a React Native banking app serving 180,000+ customers under regulated security and stability constraints. Reduced key screen load time from 2.5s to 1.7s using list virtualization, memoization, and React Query for cached server state, and extracted a typed, unit-tested UI component library to standardize patterns across the app.

React Native Performance Optimization Memoization React Query UI Components Unit Testing

Frontend Developer

FINSHAPE

Jun 2020 - Jan 2023 (2 years 7 months)

Maintained a headless React/React Native component library used by three product teams, standardizing patterns across banking products. Owned the Cypress end-to-end test suites gating every release.

React React Native Cypress End To End Testing UI Standardization

Frontend Developer

Onlio a.s.

Aug 2019 - Feb 2020 (6 months)

Redesigned the company website with an SEO-optimized structure and responsive SCSS/Bootstrap components to improve organic search visibility. Built React features for the eDoCat DMS application.

React SCSS Bootstrap SEO Optimization Responsive UI DMS