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Case studyCompleted

M-Pesa Payment Integration Library

Built a production M-Pesa Daraja integration with typed response schemas, retry logic, and webhook validation, processing KES 1M+/month.

Node.jsTypeScriptPostgreSQLBullMQRedisSafaricom Daraja API

Project summary

Production TypeScript integration for Safaricom Daraja API with STK Push, B2C, C2B, retries, and webhook validation.

Payment Flows

STK PushB2CC2B

Monthly Volume

KES 1M+

Problem

  • Payment APIs need reliability, traceability and safe retry behavior because failures affect real money.

Architecture

  • Problem-first framing so reviewers understand the operating context before implementation.
  • Implementation details are tied to the stack and workflows in the project record.
  • Sensitive client and company details are sanitized while preserving technical credibility.
  • Business value and measurable outcomes are highlighted where evidence exists.

Key Decisions

  • Use only completed work supported by the résumé or public repository evidence.
  • Keep project claims specific, factual, and proportionate to available proof.
  • Separate confidential client or company information from public technical summaries.
  • Prioritize implementation decisions and outcomes over decorative presentation.

Implementation

  • Built a typed Daraja API integration with STK Push, B2C and C2B flows, retry logic, and webhook validation.
  • Documented the stack, business context, and relevant operational outcomes.
  • Prepared a concise recruiter summary and safe public case-study presentation.

Quality Gates

  • Public records include the problem, solution, stack, business value, and evidence status.
  • Sensitive details remain intentionally summarized.
  • No unsupported performance, certification, or capability claim is included.

Results

  • Supported a live e-commerce environment processing KES 1M+/month.
  • Demonstrates completed work rather than tutorial or study-plan output.
  • Supports software, backend, payments, business-systems, infrastructure, or computer-vision roles.

Future Improvements

  • Add screenshots or architecture diagrams where safe to publish.
  • Add demo videos for public-facing work.
  • Attach additional verified performance or business-impact metrics when available.

Public Evidence

  • Deployed