Serhiy NikiforovOpen to work

About me

Who I am & how I got here

I'm a Senior React Native developer focused on cross-platform mobile delivery, performance and product scaling — most recently across FinTech and HealthTech. I care about apps that feel fast and truly native, and I lean on AI-assisted tooling to ship production-quality work quickly.

Right to live and work in Ireland · Open to full-time or contract, hybrid or remote.

Career

  1. 2025 — 2026

    Senior React Native Developer

    Pyra · Hybrid

    Joined a Web3 FinTech card product as the first external engineer and led the iOS/Android rebuild while volume scaled from $50K to $4.8M+ over 10 months — shipping 40+ screens and cutting cold-start time by ~60%.

  2. 2024 — 2025

    React Native Developer

    Applica Agency · Remote

    Delivered two production apps end to end — a cross-platform invoicing product and an AI-powered golf analytics app — owning architecture, implementation and store releases, and mentored a junior developer.

  3. 2023 — 2024

    React Native / Full-Stack Developer

    Freelance · Remote

    Modernised a legacy React Native dating app across mobile and a Node.js/MongoDB backend, cutting screen load times by ~50% and crash rates by ~70% while lifting registration completion.

  4. 2021 — 2022

    React Native / Web Developer

    CloudFactory · Remote

    Built mobile and web for a large-scale FinTech investment platform serving 200K+ users, with real-time portfolio management and trade-execution flows.

  5. 2019 — 2020

    React Native / Full-Stack Developer

    Decision Mapper · On-site

    Delivered 4+ cross-platform apps across education, dating and social domains, designing scalable mobile and backend architecture from build to release.

  6. 2017 — 2018

    Web Developer

    Kport Web Studio · On-site

    Built 10+ Drupal websites end to end — backend configuration through responsive frontend — and shipped SEO improvements that grew organic visibility.

  7. 2016

    MSc, Applied Mathematics

    Vernadsky Taurida National University

    The maths grounding behind the engineering — still shapes how I break problems down.

Off the clock

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