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Developed a HIPAA-compliant dashboard app for the client (based in the United States) to be able to:

  • upload insurance claims (in the form of X12 EDI files),
  • and analyze the root cause(s) of medical billing denials/rejections (i.e. the refusal of an insurance company or carrier to honor a request by an individual (or his or her provider) to pay for healthcare services obtained from a healthcare professional).

The app enabled the client to consult clinics, hospitals, and healthcare practitioners to recover rejected payments from insurance companies.


  • React.js
  • styled-components (CSS-in-JS)
  • Redux
  • flow (static type checking)


  • Node.js
  • express
  • MySQL
  • Google Cloud Platform