Jakub Holaza

About

Frontend engineer who likes building complex applications and the infrastructure behind them - including custom micro-frontend frameworks. I work across multiple React frameworks and care about the deeper layers: performance, bundlers, and server-side rendering. Right now that spans React Native (iOS + Android) and Next.js on a shared GraphQL stack at Groupon. Stack: React · React Native · TypeScript · JavaScript · GraphQL · Next.js · Expo

Experience

• External Collaborator at Self-employed
  Mar 2023 - Present · 3 yrs 5 mos

  - Build and ship features across the full stack — GraphQL schema/resolvers → Apollo client → React Native UI in a large Nx monorepo serving iOS, Android, and web. - Diagnose production issues by tracing analytics and funnel events through Elasticsearch and Grafana, turning data into targeted fixes. - Keep delivery fast and reliable through CI, automated workflows, and code-review discipline. - Built a custom AI-assisted development toolchain (agents + automation) integrated into the team's workflow.

• Software Engineer at Notino
  Jul 2021 - Mar 2023 · 1 yr 9 mos

• Frontend Developer at Techmates International s.r.o.
  Jan 2022 - Jun 2022 · 6 mos

• Software Developer at Tieto
  Mar 2018 - Jun 2021 · 3 yrs 4 mos

  FE - ReactJS, Typescript, Redux, BE - Spring boot