Bence Barkanyi

About

I am a full stack developer focused on payments, mobile apps, and backend services in regulated environments.

In my current role, I work across Node.js services, Android/iOS integrations, and card-present payment flows that process millions of transactions annually. Most of my day-to-day work is in JavaScript/TypeScript and Kotlin, with Swift when needed.

I enjoy turning unclear requirements into practical, maintainable releases and working closely with product and operational teams to keep delivery steady.

Skills

Languages

JavaScript / TypeScript
Kotlin
Java
Swift

Mobile

Android
iOS
React Native
SoftPOS
Payment Hardware SDKs

Backend

Node.js
Express / Hono
REST APIs
Event-Driven Integrations

Payments & Compliance

Card-Present Payments
PSP Integrations
PCI DSS
EMV Level 3 Certification Support

Cloud & Data

AWS
Firebase
PostgreSQL / SQLite
Firestore / DynamoDB

Delivery

GitHub Actions and CI/CD Pipelines
Technical Documentation
Stakeholder Support
Agile Delivery

Experience

Full Stack Developer @ CabCard Services

Jun 2023 - Present

TypeScript Node.js Kotlin Swift React Native Payment Integrations PCI DSS

Full-stack role spanning payment gateway services, mobile SDK integrations, and delivery in a PCI-regulated card-present environment.

Built payment gateway services that support millions of card-present transactions annually.
Developed Android and iOS SDK layers for payment hardware, with sample apps and documentation to support customer onboarding.
Migrated a React Native Android app to a SoftPOS SDK implementation used in production.
Implemented transaction monitoring and risk controls that materially improved chargeback outcomes over sustained production use.
Led delivery of PEP and sanctions monitoring capabilities, including a major restructuring of the core data model to meet regulatory requirements.
Supported CI/CD and release workflows for backend and mobile projects, and worked directly with customer technical teams during integrations.

Senior Administrator @ Canada Life International

Oct 2019 - Sep 2020, May 2021 - Jun 2023

Operations Regulated Workflows Quality Assurance Training

Operations-focused role in the onboarding function, handling complex adviser cases and supporting process quality in a regulated financial setting.

Processed complex onboarding applications and adviser queries in a regulated environment.
Maintained consistent quality performance by supporting procedure reviews aligned with policy and regulatory requirements.
Trained new colleagues and provided day-to-day support within the onboarding team.

Projects

Penny Plummet Browser Casino + Incremental Game

2025 - Present

Vue 3 TypeScript Vite Pinia IndexedDB Playwright axe-core

A TypeScript Vue app that combines casino game logic, persistent local data, bilingual UI (English/Hungarian), and accessibility testing.

Built interconnected Blackjack, Roulette, and Clicker loops that share one in-app chip economy.
Implemented local persistence with IndexedDB, including transaction history, summaries, and balance checks.
Added i18n support for en-GB and hu-HU with locale persistence.
Set up type-checking, tests, linting, and route-level accessibility checks via Playwright + axe.
Supports install to phone home screen for quick access.

Play Penny Plummet

Cypher Trading Trading Bot Dashboard

Jul 2023 - Feb 2024

Vue.js Node.js Stripe API Firebase

A dashboard for monitoring automated trading tools with subscription and account management.

Delivered as a paid client project; not publicly deployable under my own ownership.
Built dashboard and subscription flows with Stripe integration.
Implemented backend logic with Firebase Cloud Functions.
Connected bot performance metrics into the client dashboard.
Added TOTP-based 2FA for account security.