Timothy M. Tse

Career

Experience

  1. – Present

    Full Stack Developer

    Viewpost

    Orlando, FL (Remote)

    Current

    Full stack developer across the client and server sides of Viewpost’s electronic payments network, specializing in the fraud, risk, and audit systems that keep transactions secure.

    • Built a tool that lets support teams identify and flag suspicious merchants directly from transaction data.
    • Extended an internal application so customer service can track and monitor high-risk accounts.
    • Added reporting tools for auditing companies across the network, supporting compliance and data-driven decisions.
    • Wrote and optimized SQL stored procedures to speed up data aggregation.
    • Refactored React components into generic, reusable building blocks shared across the codebase.

    Skills & tools

    • C#
    • React
    • Node JS
    • JavaScript
    • SQL
    • Microsoft SQL Server
    • .NET
    • Claude Code
    • PowerShell

  2. –

    Software Engineer II, Credit Risk

    Zip Co

    New York, NY

    Backend engineer on the credit risk decisioning team for Zip’s buy now, pay later platform, building the microservices behind fraud and risk analysis in an agile, test-driven environment.

    • Led the design and deployment of a FastAPI service on Microsoft Azure that made the risk assessment pipeline more efficient.
    • Partnered with the data team to build a machine learning–driven risk assessment pipeline that reduced risk exposure while raising limits for low-risk customers.
    • Built part of a new rewards pipeline that evaluates rewards eligibility on new customers’ purchases.
    • Drove an effort to document the inputs and outputs of every API endpoint and microservice in the system.
    • Prevented a potential outage caused by a third-party vendor through defensive coding.

    Skills & tools

    • C#
    • Python
    • FastAPI
    • Microsoft Azure
    • Vue JS

  3. –

    Software Engineer

    Datacor, Inc.

    Florham Park, NJ

    Full stack developer on the Datacor CRM team, building the sales analysis and reporting features customers rely on to understand their business.

    • Designed and built a sales analysis module in React, including the backend calculations, based on ITR Economics’ Rates-of-Change model.
    • Reworked and tested the backend sales aggregation systems to improve performance and reliability.
    • Led customer training sessions at Datacor’s annual user conference.

    Skills & tools

    • Java
    • React
    • SQL
    • Microsoft Access