Open to opportunities

Alvar Aronija

@alvararonija

Message

Senior React Native engineer building fintech & crypto apps end to end.

Sweden

Message

What I'm looking for

I’m looking to build production-grade React Native products in fintech/crypto, owning architecture end to end—testing, CI/CD, monitoring, and reliable on-call—while leading teams with secure, data-driven technical decisions.

I’m a senior mobile engineer with 7+ years building and scaling digital products end to end, with 5+ years focused on production React Native. I’ve shipped 10+ React Native apps across fintech, insurance, and consumer domains—owning architecture, development, testing, CI/CD, production monitoring, and on-call.

I bring deep hands-on experience integrating EVM-compatible blockchain and WalletConnect into business-critical financial flows. I’m especially strong in transaction & signing flows and non-custodial patterns, with a practical focus on secure handling of funds.

I lead small teams with an autonomous, data-driven approach to technical decisions. As a founder and Senior React Native / Fullstack Consultant, I delivered end-to-end mobile and fintech products from concept to production, including architecture, backend development, CI/CD, monitoring, and operational ownership.

I also work with an AI-first development workflow—Claude Certified Architect (Anthropic) and using AI-assisted tools (Claude, Cursor, OpenAI API) in shipped products. My goal is simple: keep delivery fast without sacrificing reliability, test coverage, or production readiness.

Experience

Work history, roles, and key accomplishments

Current

Founder & Senior RN Consultant

Current

Triplefive

Jan 2023 - Present (3 years 6 months)

Founder and senior consultant delivering end-to-end mobile and fintech products from concept to production. Led React Native and full-stack architecture, GitHub Actions CI/CD, Sentry monitoring, production on-call, and built EVM-compatible blockchain and WalletConnect integrations for business-critical financial flows.

React Native TypeScript GitHub Actions Sentry On Call EVM Compatible Blockchains WalletConnect

React Native iOS/Android Developer

We App

Jan 2019 - Jan 2023 (4 years)

Designed and shipped 10+ production React Native apps across fintech, health, and consumer domains. Built native iOS and Android modules and owned delivery, stability, testing, and mobile user experience across the full stack.

React Native Mobile App Development Full Stack Testing Mobile User Experience

App Validation Consultant

Polestar

Jan 2020 - Jan 2021 (1 year)

Designed and developed an app-validation system for third-party apps on Polestar 2 (Android/Google Automotive). Supported an external developer ecosystem through collaboration with Polestar, Volvo Cars, and Google and delivered technical presentations and live demos to executive stakeholders.

Android App Validation Systems Automotive App Ecosystems System Design Collaboration