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CV

Technical Lead focused on improving architecture and delivery in large-scale mobile applications (cross-platform technologies) used in regulated fintech environments. Experienced with modular architectures and CI/CD setups
that allow multiple teams to work in parallel. Hands-on engineer who prefers pragmatic solutions over theoretical ones.

Work Experience

Mobile Consultant

Moxy Lab LTD | Feb 2024 – Present

Flutter

  • Ongoing feature development and architectural planning of a multi-tenant whitelabel mobile platform serving tourism and gastronomy industries with customizable UI and domain-specific functionalities.

Technical Lead

StoneX Poland | Apr 2022 – Present

React Native · Xamarin.Native · Android (Kotlin)

  • Technical leadership within a regulated real-time trading mobile platform (Forex.com mobile app, 500k+ users, real time market data,
    high compliance requirements, large monorepo environment).
  • Architectural alignment across 4+ cross-functional mobile teams.
  • Ownership of mobile delivery standards, technical direction, and engineering governance.
  • 30–40% hands-on (critical module design, key feature implementation, working on day-to-day tickets, and code reviews).
  • Team mentoring and development (team performance reviews, career growth planning).
  • Active involvement in recruitment and cross-team engineering alignment.
  • Migration from Xamarin.Native stack to React Native platform.

Xamarin Developer

StoneX Poland | Jul 2021 – Apr 2022

Xamarin.Native

  • Development and maintenance of large-scale white-label real-time trading mobile platform powering multiple brokerage
    brands.

Senior Android Developer

Cyfrowa Foto | Sep 2020 – Jun 2021

Android (Kotlin)

  • Development and maintenance of Android applications within an e-commerce portfolio.

Senior Mobile Developer

Capgemini Poland | Nov 2018 – Oct 2021

Xamarin.Native · Flutter · Android (Kotlin)

  • Delivered cross-platform and native mobile solutions for enterprise clients.
  • Worked across Xamarin, Flutter, and Kotlin projects in distributed teams.
  • Contributed to architectural decisions and CI/CD improvements.

Xamarin Developer

TVN S.A. (NBC) | Aug 2017 – Nov 2018

Xamarin.Native

  • Developed high-traffic consumer mobile applications (weather & TV show apps).

Junior C# Developer

Statica | Oct 2016 – Aug 2017

Xamarin.Native · Android (Kotlin)

  • Developed trading and brokerage-focused mobile applications with advanced charting and real-time features.

Core Expertise

Modular Mobile Architecture

  • Led restructuring of a 500k+ LOC regulated trading platform into a modular monolith enabling 4+ mobile teams to work
    in parallel within a shared monorepo.
  • Identified and resolved modules integration bottlenecks that previously blocked team independence.
  • Defined module boundaries and dependency isolation standards.
  • Reworked modularization strategy during migration from Xamarin to React Native consolidation platform to ensure
    long-term scalability.

CI/CD & Delivery Governance

  • Designed and iteratively optimized CI pipelines to significantly improve build/code analysis performance and developer
    feedback cycles.
  • Increased API release frequency from bi-weekly to weekly in a corporate regulated environment by introducing automated
    API-level E2E validation and suitable pipelines for API builds and deployments.
  • Embedded validation gates into pipelines to prevent unstable builds reaching QA stages.
  • Improved developer experience through systematic pipeline and workflow refinement.

Testing Strategy

  • Designed and implemented team's testing strategy focused on integration and API-level validation.
  • Defined clear boundaries between unit, integration, and end-to-end testing suitable to the project needs and team expectations.
  • Reduced over-mocking and low-value tests by aligning test strategy with real application behavior.
  • Shifted quality validation earlier into CI automation, reducing QA bottlenecks.

Technical Leadership

  • 30–40% hands-on leadership focused on critical modules and architectural refactoring.
  • Pragmatic decision-making under company's policies, performance, and scalability constraints.
  • Multi-team technical alignment within large-scale fintech program (30+ engineers).
  • Balancing long-term architectural sustainability with short-term product delivery needs.

AI-Assisted Development

  • Daily use of AI tools as part of the development workflow: Claude Code (agentic coding), GitHub Copilot, ChatGPT.

Work Environment Where I Perform Best

These are conditions where I deliver my best work — not dealbreakers, but factors that bring out the most impact.

  • Product-focused environment where engineering work has clear, long-term impact.
  • Teams that prioritize meaningful outcomes over low-impact activities.
  • Pragmatic, context-driven decision-making instead of process for the sake of process.
  • Strong collaboration across engineering, QA, and product.
  • Culture that values broad software engineering expertise and architectural thinking over perfect knowledge of a single
    framework.
  • Emphasis on ownership, quality, and sustainable product growth.
  • Environment with multiple cross-functional teams
  • Direct, small-group conversations over large meetings — I believe most problems are solved faster at the desk than in a conference room.

Personal Projects

Parenting App

Flutter · Strapi (Cloud)

  • Building a multi-module Flutter application designed for parents — providing curated content and helping plan quality time with children.
  • Sole developer handling end-to-end delivery: mobile app architecture, backend (Strapi Cloud), and content pipeline.
  • In active development since spring 2025.

Xamarin Training

  • Delivered corporate Xamarin training sessions for multiple companies (2019–2021).

Publications

Education

Electrical and Computer Engineering, Informatics
Rzeszów University of Technology | Sep 2014 – Aug 2020