M. Junaid Akhtar Khan
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© 2026 Junaid Akhtar. All rights reserved.Senior Software Engineer • Backend & Full-Stack
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Cashless Vending Platform

Role

Software Engineer / IoT Team Lead

Duration

2022 - 2023

Tech Stack

Node.js, TypeScript, Payments, Azure

Problem

Unattended retail required reliable payment orchestration and device communication across live fleets.

Constraints

  • Financial correctness
  • Always-on services
  • Legacy hardware integration

Responsibilities

  • Owned backend services
  • Handled tenant isolation
  • Maintained production environments

Key Engineering Decisions

Idempotent transaction flows

Prevented duplicate financial operations during retries and connectivity issues.

Outcome / Impact

  • Stable live operations
  • Reduced payment disputes