Zander Wessels

Zander Wessels

Founder of Quantum Code, Mobile & SDK Engineer at Halo Dot. 7+ years shipping mobile, web, fintech, and blockchain products.

Cape Town / Pretoria, South Africa+27 71 534 8833code.crafters.za@gmail.com
LinkedInGitHub
23+
Projects shipped
16+
Blockchains integrated
7+
Years experience
18+
Team members led

Experience

Software Engineer

Jun 2026 - Present
Penta Consulting · Synthesis / Halo Dot
Cape Town · Remote · Contract
TypeScriptNode.jsREST APIsKotlinSwiftFlutterPCI DSS
  • Engaged through Penta Consulting on assignment to Synthesis Software Technologies, working inside Halo Dot — Synthesis' SoftPOS fintech business, part of the Araxi Limited group
  • Build and maintain backend services in TypeScript and Node.js — secure REST APIs consumed by the Kotlin and Swift payment SDKs — to enterprise standards of security, compliance and release governance

Mobile & SDK Engineer

Jun 2026 - Present
Halo Dot
Cape Town · Hybrid · Contract
FlutterDartKotlinJetpack ComposeSwiftTypeScriptNode.jsBloc/CubitAndroid SDKTap to Pay on iPhonePCI MPoCPCI DSS v4.0REST APIs
  • Build the mobile products behind Africa's first compliant SoftPOS solution, turning everyday smartphones into secure, PCI-certified payment acceptors
  • Maintain Halo Workbench, a single Flutter codebase shipping as 19+ distinctly branded merchant apps for clients including Betway, Pick n Pay and Vodacom — identity, servers, certificate pinning, theming, language and feature set all driven by a brand config file rather than a fork
  • Develop sdk_ui, a Jetpack Compose SDK owning the full payment journey from amount entry and card read through PIN entry, result and digital receipt, drivable from Kotlin, Flutter or React Native hosts
  • Designed a composable tree of 30+ build-time features, so one source produces anything from a payment-only build to a full merchant app with no runtime branching
  • Implement tap-on-phone payments, app-to-app intents, payment links, Push to Terminal, scan-to-pay, tipping, refunds, reversals and DebiCheck mandates
  • Deliver against PCI MPoC, PCI DSS v4.0 and PCI PIN requirements, including TLS certificate pinning, device integrity and attestation, and secure PIN entry

Founder

Jan 2026 - Present
Quantum Code (Pty) Ltd
Cape Town · Remote
TypeScriptNode.jsFlutterNextJSFirebaseCloud FunctionsGoogle CloudWhatsApp Business APIMeta Graph APICI/CDVercelQuickBooks APIXero APIMeta APIYOCO APIAdumo API
  • Founded a software consultancy delivering custom financial tools, workflow automation, and analytics for South African businesses
  • Built software that generated R1M+ in revenue for a single client within the first 5 months
  • Architected and delivered end-to-end solutions integrating QuickBooks, Xero, and industry-specific platforms with Node.js/TypeScript backends deployed on Google Cloud Run
  • Own the full lifecycle from client discovery and scoping through to deployment, monitoring, and support
  • Built an AI-powered payment assistant integrated with WhatsApp Business API and Meta Graph API, enabling users to initiate and manage crypto/fiat payments conversationally through WhatsApp or from the Dashboard

Chief Technical Officer

2023 - 2026
XRPayNet Global Limited
TypeScriptNode.jsFlutterNextJSFirebaseCloud FunctionsGoogle CloudFastlaneShorebirdCI/CDCloudflareRedis
  • Drove the technical vision and architecture for Volta Wallet, a multi-chain crypto exchange and wallet serving thousands of users
  • Built and led a 5-person engineering team across mobile, backend, and blockchain
  • Architected the full stack with Flutter, Firebase, and Cloud Functions on Google Cloud; built custom monitoring dashboards for transaction throughput and system health
  • Established CI/CD pipelines with Fastlane and Shorebird, enabling OTA updates and zero-downtime releases
  • Integrated 16+ blockchain networks with ed25519 and k256 cryptographic signing

Flutter Developer

2022 - 2023
Spaza Tech (PTY) Ltd
FlutterDartFirebaseFirestoreBloc/CubitREST APIsGoogle Cloud
  • Promoted from intern to developer within one month, then to mid-level within a year
  • Shipped production cross-platform apps using Bloc/Cubit state management, Firestore, and in-app payments
  • Mentored developers across a 9-person team and established Flutter best practices and architecture patterns
  • Integrated push notifications, Hive local storage, and native platform APIs across iOS and Android

Software Developer

2019 - 2022
Oseci
Vue.jsQuasarVuetifyLaravelPHPREST APIsMySQL
  • Delivered 10+ client projects including e-commerce platforms and building management systems
  • Built full-stack applications with Vue.js (Quasar, Vuetify) on the frontend and Laravel with RESTful APIs on the backend
  • Developed skills in ethical hacking, network security, and reverse engineering alongside core development work

Assistant to Technical Director

2019
SM Enviro
PHPJavaScriptXeroHTML/CSS
  • Programmed water quality measurement systems for field deployment using embedded hardware
  • Managed invoicing and financial operations on Xero, designed marketing material, and maintained the company website

Skills Matrix

Frontend & Mobile

Flutter/Dart
Next.js/React
Kotlin/Compose
Android/iOS Native
SDK Development

Payments & Fintech

SoftPOS
Payment Integrations
EMV Contactless
PCI MPoC / DSS
Mobile Security

Backend & Cloud

Node.js/TypeScript
Firebase/Firestore
Google Cloud
REST/GraphQL APIs
Laravel/PHP

Blockchain

XRPL/Ripple
Web3.js/SDKs
EVM Chains
Solana
Cryptography

Security

Reverse Engineering
Network Analysis
Penetration Testing
OSINT
Binary Analysis

Leadership

Team Management
Architecture Design
Code Review
Agile/Scrum
Client Engagement

Skills & Technologies

Languages

TypeScriptJavaScriptDartPythonRustGoJavaKotlinSwiftObjective-CC#C++PHPRubyGDScriptLuau

Frontend & Mobile

FlutterReactNext.jsVue.jsQuasarTailwind CSSVuetifyBloc/CubitJetpack ComposeiOS SDKAndroid SDK

Payments & Fintech

SoftPOSTap to PhoneTap to Pay on iPhonePCI MPoCPCI DSS v4.0PCI PINEMV ContactlessSecure PIN EntryDebiCheckPayment LinksPush to TerminalScan to PayYOCO APIAdumo API

Backend & Data

Node.jsLaravel.NETGraphQLREST APIPrismaFirebaseFirestoreMongoDBSQLiteRedisJWTWhatsApp Business APIMeta Graph APIDiscord.js

DevOps & Cloud

DockerGoogle Cloud RunCloud FunctionsCloud SchedulerCloudflare WorkersVercelFastlaneShorebirdGitHub ActionsBitbucket PipelinesJenkinsGitngroktmux

Blockchain

XRPLCasperBitcoinEthereumSolanaArbitrumAvalancheTronStellarXDCDogecoinLitecoinPolygonBSCMAKAVanarWeb3.jsCryptography

Security & Reverse Engineering

Certificate PinningDevice AttestationGhidraIDARadare2Rizin/CutterFridaWiresharkNmapOWASP ZAPSpiderFootRustScanGobusterAircrack-ngJohn the RipperBinwalkExploitDBMetasploitProxyman

Design & Creative

Adobe PhotoshopAdobe XDAdobe LightroomDaVinci ResolveFigmaUX Design

Tools & Engines

JiraTrelloPostmanGodotUnreal EngineRoblox StudioFFmpegTesseract OCRCMakeMasonObsidian

Hardware & IoT

Raspberry Pi3D PrintingDJI DronesSerial/Picocom

Education

BSc Computer Science
Goldsmiths, University of London
2021 - 2025
Matric (GED)
Boston City Campus, Johannesburg
2019

Certifications

C# Interfaces & OOPC# FundamentalsBuilding Web Applications in PHP

Languages

English
Fluent
Afrikaans
Fluent