// mobile × ai developer

Tomasz Misiukiewicz

I build AI agents and the mobile apps they power.

senior software engineer @ callstack

Get in touch See projects

about

Professional developer since 2014, specializing in cross-platform applications built with React Native.

These days I also build AI agents — autonomous systems, tool use, memory, evals — and bring them into mobile products.

AI tools — agents, copilots, automated testing — are part of my daily mobile workflow.

Based in Białystok, Poland.

what I do

AI Agents

Design and orchestration of autonomous agents — tool use, memory, multi-step planning, evals and production hardening. I also work with Hermes Agent: self-hosted deployment, custom tools, skills and automated workflows.

LLM APIsMCPHermes AgentSkillsMemory

AI in Software Development

Using AI to build software faster and better — agentic coding, automated code review, testing and workflow automation.

Agentic codingCode reviewAutomated testingWorkflow automation

Mobile Apps

Cross-platform apps — from first commit to store release.

React NativeTypeScriptTestingPerformance

projects

Selected public repositories — open-source work.

Expensify/App

Working on app performance and product & code quality.

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Expensify/react-native-onyx

State management library that acts as the backbone of the Expensify app.

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react-native-community/cli

Maintained the React Native CLI used by projects worldwide.

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Let's talk —
AI, mobile, anything.