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Backend Dev for WhatsApp Crypto Payments (Node.js/Python)

  • Posted:
  • Proposals: 17
  • Remote
  • #4369782
  • Expired
Sensussoft Software Private LimitedRubab R.Reymark M.Shazedur Rahim J.Poly Akter P. + 12 others have already sent a proposal.
  • 5

Description

Experience Level: Expert
Description:
Mission-critical tasks:
✔ Implement NOWPayments API for dynamic USDT addresses (docs provided)
✔ Encrypt sensitive data (AES-256) + patch SQLi/XSS flaws
✔ Optimize Firestore for <100ms response times
✔ Handle webhook failures/retries
Tech Stack:

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Clarification Board Ask a Question

  • Naresh S.

    Hi Mike,
    To proceed smoothly, could you confirm if the Firestore queries are using composite indexes for key views? Also, is the NOWPayments webhook setup already partially implemented, or should we handle full setup including retries and fallbacks?
    Thanks