Muhammad Abubakar Siddique

Co-Founder

Lahore, Punjab, Pakistan7 yrs 8 mos experience
AI EnabledAI ML Practitioner

Key Highlights

  • Built a multi-terminal Android POS system processing $1.5M AUD in 10 days.
  • Vetted member of Toptal, top 3% globally.
  • Expert in offline-first architectures and payment systems.
Stackforce AI infers this person is a Fintech and Mobile Engineering expert with a focus on high-performance systems.

Contact

Skills

Core Skills

FintechMobile EngineeringCross-platform DevelopmentEvent PlatformsBackend DevelopmentTeam ManagementSecurity SystemsApplication Development

Other Skills

Android DevelopmentStripe TerminalPayment IntegrationMobile EnterpriseAndroidiOSKotlinReact NativeKMMSwiftStripePayment TerminalMobile Application DevelopmentDatabasesNode.js

About

I built a multi-terminal Android POS system that ran on 100+ devices and processed over $1.5M AUD in 10 days. That's not a side project. That's production-grade, high-stakes engineering β€” offline-first architecture, Stripe Terminal, RFID integration, real-time sync across 100 devices, zero tolerance for failure. That's the standard I bring to every engagement. What I do: I'm a Senior Fintech & Mobile Engineer with 8+ years building scalable Android, iOS, and cross-platform applications for startups and enterprises across the US, EU, and UAE. I specialize in the hard problems β€” payment systems, hardware integrations, offline-first architectures, and high-performance mobile at scale. I'm a vetted member of Toptal (top 3% globally) and founder of Blenzo.io, a mobile & fintech development studio. I also integrate AI tooling throughout my engineering workflow β€” from architecture planning to code generation and testing β€” which consistently accelerates delivery without cutting corners on quality. Where I've built: 🏦 Fintech & Payments β€” Stripe Terminal, Tap-to-Pay, POS systems, offline transactions πŸ“± Mobile β€” Android (Kotlin/Java), iOS (Swift), React Native, Kotlin Multiplatform βš™οΈ Backend β€” Node.js, NestJS, REST APIs, Firebase πŸ”Œ Hardware β€” RFID, BLE, serial/UART, kiosk & scanner integrations πŸ—οΈ Architecture β€” MVVM, modular systems, CI/CD, offline-first sync Industries I know deeply: Fintech Β· POS & Kiosk Β· Event Platforms Β· IoT & Access Control Β· E-commerce Β· Travel & Loyalty πŸ† Coding competition winner β€” Geek Coding 2k17 (1st), Funky Apps 2k17 (1st), Speed Programming 2k16 (2nd) Working with me: I think in systems, not isolated features. I care about business outcomes, not just clean code. I've worked with global clients remotely across time zones and consistently deliver under tight deadlines. If you're building something in fintech, payments, or complex mobile β€” or you need a senior engineer who ships fast with AI-augmented workflows β€” let's talk. πŸ“© abubakar@blenzo.io 🌐 www.blenzo.io

Experience

7 yrs 8 mos
Total Experience
2 yrs 1 mo
Average Tenure
9 mos
Current Experience

Toptal

3 roles

Senior Mobile Engineer β€” Android Β· iOS Β· React Native Β· KMM β€” Journey

Promoted

Jul 2025 – Apr 2026 Β· 9 mos Β· Remote

  • Built and owned core product features for a consumer travel rewards platform β€” helping users discover properties, book stays, and earn loyalty points. Worked across a full cross-platform stack (Android, iOS, React Native, KMM) in a fast-moving, remote-first US product team.
  • Architected and delivered the Discover page end-to-end β€” feed-based UI, advanced filtering, and map-based property exploration β€” one of the platform's highest-traffic and most complex user-facing features
  • Led native β†’ React Native migration for key app flows, reducing cross-platform development overhead and accelerating feature delivery across Android and iOS simultaneously
  • Designed and implemented a scalable analytics architecture using HighTouch and Customer.io β€” standardized event tracking across platforms, improving data consistency and giving the product team reliable behavioral insights
  • Optimized app performance across critical user flows β€” reduced rendering bottlenecks, improved API response handling, and tightened state management, resulting in measurably smoother experience on both Android and iOS
  • Owned shared business logic across platforms using Kotlin Multiplatform (KMM) β€” ensuring consistent behavior between Android and iOS without duplicating core logic, reducing bugs and maintenance overhead
  • Collaborated daily with US-based PMs, designers, and backend engineers in a cross-functional agile team β€” delivering production-ready features under tight sprint timelines
KotlinKMMAndroid DevelopmentReact NativeSwiftMobile Engineering+1

Android Integration Engineer β€” Fintech POS Platform β€” Sendrato Australia PTY LTD

Mar 2025 – May 2025 Β· 2 mos Β· Remote

  • Built and shipped a production multi-terminal Android POS system deployed across 100+ devices at a high-traffic live event in Australia.
  • Processed $1.5M+ AUD in transactions in 10 days β€” zero downtime, zero critical failures
  • Integrated Stripe Terminal (Tap-to-Pay) with offline transaction queuing and automatic sync on reconnect
  • Supported Sunmi K2, D3, and Zebra CC6000 hardware with full RFID card reader integration
  • Designed offline-first architecture with retry logic and fault tolerance for no-network environments
  • Delivered under tight event deadline β€” production-ready, not prototype quality
Android DevelopmentStripePayment IntegrationPayment TerminalFintechMobile Engineering

Senior Fintech & Mobile Engineer β€” Android Β· iOS Β· React Native Β· KMM

Oct 2021 – Present Β· 4 yrs 8 mos Β· Remote

Mobile EnterpriseAndroidiOSKotlinReact NativeMobile Engineering+1

Blenzo.io

Co-founder & Lead Engineer

May 2025 – Present Β· 1 yr 1 mo

  • Boutique fintech and mobile engineering consultancy specializing in POS systems, Stripe Terminal integrations, and cross-platform mobile development.
Android DevelopmentStripe TerminalPayment IntegrationCross-platform DevelopmentFintechMobile Engineering

Evento solutions llc

Senior Mobile Engineer β€” Event Platforms & Enterprise Apps

Sep 2023 – Apr 2025 Β· 1 yr 7 mos Β· Remote

  • Built and owned mobile engineering for large-scale international event platforms deployed at major conferences and exhibitions across Dubai and Saudi Arabia β€” high-visibility, high-attendance events where reliability and real-time performance were non-negotiable.
  • Delivered full-featured event apps end-to-end β€” agenda management, speaker profiles, sponsor directories, participant lists, and committee coordination β€” used by thousands of attendees at live international events in the UAE and KSA
  • Built and integrated AR-based venue navigation β€” enabling attendees to explore large event venues in real time using augmented reality, one of the platform's most technically complex and differentiating features
  • Engineered a real-time networking system β€” in-app chat, meetup requests, and attendee connection features β€” driving engagement between participants across multi-day conference formats
  • Implemented access control and guest management system β€” role-based entry verification ensuring only registered attendees could access specific event zones, replacing manual checks at the door
  • Maintained production stability across live events where downtime was not an option β€” real-world, high-stakes deployment experience with zero tolerance for failure
Android DevelopmentMobile Application DevelopmentMobile EngineeringEvent Platforms

Enjoy deals marketing ltd

Mobile Team Lead β€” Android Β· iOS Β· Node.js

Jan 2023 – Aug 2023 Β· 7 mos Β· Dubai, United Arab Emirates Β· On-site

  • Led a cross-platform mobile team building "Enjoy" β€” a location-based deals and loyalty app for Dubai β€” from zero to live on both the Play Store and App Store. Managed two iOS developers, owned Android development end-to-end, and built the backend mobile APIs in Node.js.
  • Built and shipped a full consumer app from scratch to production β€” Android + iOS, deployed live on both stores within an 8-month contract in Dubai
  • Led a team of 3 engineers (Android + 2 iOS) as the technical lead β€” owned architecture decisions, code reviews, sprint planning, and delivery accountability
  • Engineered a location-based vendor discovery system β€” geo-filtered search, preference-based filtering, and real-time coupon redemption (BOGO, percentage discounts, complimentary offers)
  • Implemented payment and subscription flows β€” credit/debit card-based subscription model with vendor offer management and performance tracking dashboard
  • Built vendor-facing management portal β€” allowing vendors to create, manage, and track their offer performance independently, reducing operational overhead for the business
  • Developed mobile APIs in Node.js β€” owning both client and server side, ensuring tight integration and fast iteration without backend dependency bottlenecks
DatabasesNode.jsAPI DevelopmentPayment HandlingMobile EngineeringBackend Development

E2e solution providers

Mobile Team Lead β€” Enterprise & Consumer Applications

Apr 2021 – Jan 2023 Β· 1 yr 9 mos Β· Lahore Β· On-site

  • Led mobile architecture and engineering across two major product lines simultaneously β€” an enterprise field operations platform for NestlΓ© Pakistan and a sports management app used by leading golf clubs across Pakistan.
  • NestlΓ© Brand Activation Platform
  • Architected and led development of a real-time field monitoring app for NestlΓ© Pakistan β€” enabling automated reporting, live progress tracking, and ground activity management across nationwide brand activation campaigns
  • Owned mobile architecture design end-to-end β€” from system design through delivery β€” for one of Pakistan's largest FMCG enterprises
  • Supervised and mentored the mobile development team, conducting code reviews, enforcing architectural standards, and ensuring delivery quality across sprints
  • GemGolfer β€” Sports Management Platform
  • Led mobile engineering for GemGolfer, a tournament and handicap management app compliant with the World Handicap System β€” one of the few apps globally to implement WHS-standard handicap calculations
  • Delivered features covering tournament management, league tracking, tours, daily rounds, and handicap calculation for competitive golfers
  • Deployed to real named clients including Karachi Golf Club, Gym Khana Golf Club, and Challenger League β€” production software used in live competitive events
JSONAndroid DevelopmentiOS DevelopmentTeam LeadershipMobile EngineeringTeam Management

Halim sol

Mobile Application Developer

Sep 2019 – Mar 2021 Β· 1 yr 6 mos Β· Lahore Β· On-site

  • Built a diverse portfolio of production Android applications across IoT, access control, security systems, and on-demand services β€” including several NDA-protected enterprise solutions involving hardware integration and encrypted device communication.
  • Encrypted BLE Access Control System (NDA β€” product name withheld)
  • Built a secure BLE mobile application that communicated with custom hardware (Raspberry Pi) to command Axis access controllers β€” enabling wireless lock/unlock of doors and access points across enterprise premises
  • Implemented encrypted BLE communication with rotating key architecture β€” ensuring all device-to-mobile communication was tamper-proof and resistant to replay attacks
  • Engineered hardware tamper detection logic β€” any physical or code-level tampering with the device immediately blocked all communication with the Axis controller, protecting the entire access chain
  • Integrated with enterprise-grade security and access control software β€” bridging mobile UX with industrial-level physical security infrastructure
  • On-Demand Relocation & Logistics Platform (NDA β€” product name withheld)
  • Built an Uber-style on-demand mobile platform for relocation services, water tanker dispatch, and waste tanker coordination β€” real-time driver matching, live tracking, and booking management
  • NFC-Based Labor Access Control Systems
  • Developed multiple NFC tag scanning systems for labor access management across secure facilities β€” role-based access, entry logging, and zone restrictions
  • Security Guard Fleet & Checkpoint Tracking
  • Built a live field operations app for security teams β€” real-time GPS location tracking, patrol monitoring, and checkpoint verification across guard routes
JSONAndroid DevelopmentNear-field Communication (NFC)Mobile EngineeringSecurity Systems

Black storm technologies

Mobile Application Developer β€” Android Β· Multi-domain Consumer Apps

Aug 2018 – Aug 2019 Β· 1 yr Β· Lahore, Punjab, Pakistan Β· On-site

  • Delivered multiple production Android applications across education, lifestyle, and Islamic utility domains β€” owning the full development lifecycle from architecture through Play Store deployment as part of a small, fast-moving dev team.
  • ClassDiary β€” Parent-Teacher Communication Platform
  • Built a dual-app ecosystem (separate Teacher and Parent apps) for real-time school communication β€” class diary updates, fee details, exam scheduling, test results, off-day announcements, and 1:1 parent-teacher chat
  • Designed real-time notification and acknowledgement system β€” parents could view, acknowledge, and comment on teacher updates, closing the communication loop between home and school
  • Islamic Utility App β€” Muslim Community Platform
  • Developed a full-featured Islamic companion app β€” Azan alerts with location-based prayer times, Duas library, and integrated Quran reading and audio recitation
  • Handled device-level features including location services, audio playback, and scheduled local notifications for prayer time reminders
  • MCQ Practice Platform β€” Student Exam Preparation
  • Built an Android-based MCQ test platform for student exam preparation β€” timed practice tests, result tracking, and subject-based question sets for self-paced learning
JSONAndroid StudioUser Interface DesignMobile EngineeringApplication Development

Lead dev's

Android Developer β€” Internship

Sep 2017 – Jul 2018 Β· 10 mos Β· Lahore Β· Hybrid

  • Early-career Android development role undertaken part-time during Bachelor's in Software Engineering (BSSE). Built foundational skills in native Android development, REST API integration, and mobile UI implementation while completing a full-time degree program.
JSONAndroid StudioFunctional Programming

Education

The University of Lahore

Bachelor of Science (BS) β€” Software Engineering

Jan 2014 – Jan 2018

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