Available for Remote Roles Globally

Raja Pooran
Kumar

SENIOR ANDROID & FINTECH ENGINEER · KARACHI, PK

5+ years building production-grade POS terminals, payment SDKs, and enterprise fintech applications. Delivered 7+ production apps serving thousands. Expert in ISO 8583, EMV, NFC, and cryptographic authentication. EMVCo, Visa & Mastercard certified.

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30K+
Daily Transactions
Processed
100+
Merchant Terminals
Deployed
10+
Enterprise SDK
Clients
5+
Years Fintech
Experience
EMVCo Level 2— Chip & PIN · NFC · Cryptographic Auth
Visa Certified— POS Integration · Authorization · Settlement
Mastercard Certified— POS Integration · Contactless · Compliance
Technical Expertise

Skills & Stack

📱
Android Development
KotlinJavaJetpack ComposeAndroid SDKKotlin CoroutinesFlowHilt / DaggerNavigation ComponentRetrofitRoom
💳
Payments & Fintech
ISO 8583EMV Chip & PINNFC ContactlessPOS Terminal DevelopmentMulti-Acquirer RoutingSettlement & ReconciliationPayment Gateway Integration
🏦
Open Banking & Wallets
PISPOpen BankingDigital WalletKYC OnboardingIBAN TransfersRaast Instant Payments
🔐
Security & Compliance
FIDO2Passkey AuthPCI DSS ComplianceCDCVMSCACertificate PinningEnd-to-End Encryption
📐
Architecture
MVVMClean ArchitectureBLoCRepository PatternDependency InjectionTDD
🦋
Cross-Platform & Integrations
FlutterDartREST APIsHardware SDKFirebaseGoogle Maps SDKCI/CD
Work History & Portfolio

Production Projects

Every project listed is live in production, verified by market usage, and follows stringent payment compliance regulations.

POS Terminal · Android SDK Techbey · Feb 2026 – Present
LOOP POS Terminal & Custom SDK
Led end-to-end development of Techbey’s flagship Android POS terminal. Built the full payment lifecycle (sale, void, settlement) via ISO 8583. Designed a multi-bank acquirer payment routing system that reduces failure by 35%. Shipped a reusable Android SDK currently exposing POS payment flows and ISO messaging, adopted by top tier merchants.
30,000+Daily Transactions
10+Enterprise Merchants
35%Routing Failure Reduction
90%+Automated Test Coverage
KotlinJetpack ComposeJava XMLISO 8583Android SDKJUnitEspresso
POS Terminal Keenu · Aug 2023 – Feb 2026
Keenu POS Application
Built the full-cycle Android payment terminal software deployed across 100+ merchant terminals. Integrated ISO 8583 protocol, chip and PIN, and hardware vendor SDKs to process PCI DSS-compliant transactions securely.
100+Merchant Terminals
PCI DSSCompliant
KotlinJetpack ComposeEMVNFCISO 8583
Open Banking · PISP Keenu · Aug 2023 – Feb 2026
Open Banking PISP App
Delivered a Flutter-based open banking app enabling instant bank transfers and national ID-based fund transfers. Compliant with State Bank guidelines and secured with FIDO2 biometric auth.
Real-timeBank Transfers
FIDO2Authentication
FlutterDartFIDO2Open Banking
Digital Wallet Rebuild Keenu · Aug 2023 – Feb 2026
Keenu Digital Wallet
Rebuilt original Ionic wallet into Flutter using Clean Architecture. Drastically improved scalability and performance, integrating Passkey and cardholder verification for secure mobile wallet transactions.
40%Faster Load Time
PasskeyIntegration
FlutterClean ArchitecturePasskeyCDCVM
Lending · FinTech Kistpay · Aug 2022 – Aug 2023
Mobile Lending & KYC Solution
Developed a comprehensive mobile lending application in Flutter with fully automated KYC onboarding, installment repayment scheduling, and custom loan management APIs for core integrations.
5,000+Active Borrowers
Full KYCPipeline
FlutterKYCFintech
IoT · HVAC Systems Ingenious Digital System · Nov 2021 – Jul 2022
Fuelix & Foxit PMS
Built Flutter applications for real-time IoT fuel monitoring and enterprise HVAC management systems. Engineered intuitive dashboards capable of monitoring 200+ connected devices simultaneously.
200+Connected Devices
IoTProtocols
FlutterIoT SDKDashboards
E-Comm · Logistics WeUno · May 2021 – Oct 2021
Rimattire & Sky Freight
Shipped high-traffic e-commerce and logistics tracking mobile apps. Integrated Google Maps for live delivery tracking, comprehensive REST APIs, and robust barcode scanning workflows.
4.5+ StarStore Rating
Maps SDKIntegration
FlutterGoogle MapsQR
Client Feedback

What Industry Professionals Say

Feedback from engineering leads and product teams I've partnered with directly.

★★★★★
"Raja delivered the LOOP POS SDK to an exceptional standard. His ISO 8583 implementation was bulletproof — we had zero host communication issues at launch. The routing system he designed saved weeks of labor and drastically improved transaction success rates."
A
Ahmed K.
CTO · Techbey
★★★★★
"Rebuilding the Keenu digital wallet in Flutter with Raja led to immediate performance upgrades. 40% faster load times, drastically cleaner architecture. His FIDO2 and Passkey integrations satisfied high regulatory and PCI compliance demands easily."
S
Sara M.
Product Lead · Keenu
★★★★★
"Built our lending platform with full automated KYC and reliable payment triggers. Clear communicator who understands complex financial flows without constant handholding. Code is always robust and highly maintainable. Highly recommended."
F
Faisal R.
Executive Director · Kistpay
Industry Credentials

Certifications

EMVCo
EMV Level 2
Chip & PIN · NFC Contactless · Cryptographic Authentication
Verified
Visa
Visa Scheme & Network
POS Integration · Authorization · Settlement & Scheme Compliance
Verified
Mastercard
Mastercard Scheme & Network
POS Integration · Transaction Processing · Contactless & Network Compliance
Verified
Offerings

Professional Services

Senior fintech engineering engagements for payment institutions, and managed digital growth tracks.

Track 01
Fintech Engineering
Senior Mobile Engineer specialized in financial stacks. Remote available for contracts and permanent roles.
POS Terminal Architecture
$75/hr
or project rate
Full lifecycle ISO 8583 host messaging
EMV Chip & PIN / NFC Contactless logic
Custom hardware SDK integration
Highly Requested
Android Fintech SDK
$85/hr
or project rate
Portable Android SDK for merchant integrations
90%+ Unit & Integration testing logic
PCI-compliant data security patterns
Open Banking / PISP Hub
$70/hr
Flutter/Android PISP integration
FIDO2 Biometrics & SCA inclusion
Track 02
Global Digital Domination
Hyper-optimized, high-converting growth assets for US, UK, AUS, and European markets. Engineered for instant leads and trust.
Local Authority Pack
$699
Fixed (USD)
5-Page Authority Site (Built for Trade/Service conversion)
24hr Prominent Click-to-Call + Emergency Buttons
Google Maps Optimization (Rank for "Service Near Me")
Instant Lead Quote Form & Professional Email setup
Trust Signals: License, Insurance, & Guarantee Badges
High Demand
International Scale Pack
$1,200
Fixed (USD)
Everything in Local Authority + Next-Gen Optimization
Full Multilingual Support (Target EU, NA & Global audiences)
Emergency-First UX Design (Built for instant conversions)
Automated Google Review & Showcase Growth System
WhatsApp Business Bot & Before/After Photo Gallery Hub
Advanced Localized SEO Mapping (USA / UK / AUS / EUR)
Let's Connect

Hire or Partner

Open for contract work, full-time roles, or technical audits. Usually reply within 24 hours.

Accepting Invitations · May 2026
📧
📱
WhatsApp / Direct
+92 331 3894217
🔗
💻
📍
Location
Karachi, Pakistan (Available Globally)
Start a Conversation

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