Chaim Mark

Full-Stack Backend, Web & React Native Mobile App Developer

Tel Aviv-Yafo, Tel Aviv District, Israel

About

15+ years of professional software development experience, strong mathematical background.

Experience

  • Senior Software Engineer at Linkme
    Jan 2026 - Present · 6 mos

    • Owned full-stack delivery utilizing Next.js 15 and React Native. • Designed and implemented an Instagram DM automation flow for a large-scale social platform with ~200M monthly active users. • Built Cloudflare Worker tracking with analytics dispatch and bot-aware redirects. • Enhanced API/web observability and release reliability through Sentry/NewRelic integrations and GitHub Actions workflows.

  • Senior Software Engineer at Trial and Error, Inc
    Aug 2025 - Jan 2026 · 6 mos

    • Led the modernization of the React Native platform to version 0.79.6, enhancing architecture and stability. • Developed EAS-powered mobile release and E2E automation workflows, boosting release confidence. • Improved release reliability through observability hardening and native dependency maintenance. • Collaborated with Product and Analytics to deliver A/B testing flows and experiment-ready rollout patterns.

  • React Native Senior Software Engineer at Quince
    Aug 2024 - Aug 2025 · 1 yr 1 mo

    • Owned end-to-end delivery of high-impact Product Detail Page (PDP) media experiences, enhancing user engagement. • Designed and launched visual-search and image-viewer journeys, improving product discovery flows. • Led performance optimization in React Native, enhancing scroll and gesture smoothness under load. • Modernized the mobile platform by migrating to React Native 0.74.x.

  • React Native Senior Software Engineer at JOKR
    Dec 2021 - Aug 2024 · 2 yrs 9 mos

    • Designed and implemented a white-label architecture for JOKR, Daki, and OXXO apps using a single React Native codebase. • Led a multi-stage upgrade program to modern React Native versions, ensuring stable delivery across production apps. • Architected campaign and recommendation experiences, optimizing merchandising updates and reducing frontend deployment needs.

  • Full-Stack Backend, Web & Mobile Apps Developer at Sweet Inn
    Nov 2018 - Dec 2021 · 3 yrs 2 mos

    I spearheaded the development of a comprehensive mobile and web application ecosystem, driving significant improvements in user experience and operational efficiency. • Built and optimized map-heavy mobile discovery experiences, enhancing usability in property search flows. • Resolved critical mobile reliability issues, improving runtime stability for essential user journeys. • Strengthened production observability through advanced monitoring and analytics tools, facilitating faster issue detection.