Alfonso
Martinez
Petz

Outbound sales professional and full-stack developer. I sell technical products and understand how they work.

San Antonio, TX. Open to relocation and remote.

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Alfonso Martinez Petz

Why sales, why now

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Experience

  1. Patient Success Representative, Outbound Enrollment

    ResMed Remote May 2023 to present

    • Handle 200+ inbound and outbound calls a day running enrollment campaigns for home medical equipment (HME) provider partners, sustaining a 95% call quality score while consistently meeting or exceeding assigned enrollment targets.
    • Work through objections across hundreds of daily conversations with cold and warm leads, reading hesitation and adjusting the pitch in real time to move prospects to a decision.
    • Improved conversion of Spanish-speaking callers by 15% by tuning an AI-powered phone system with engineering, designing Spanish-language test cases and labeling edge cases.

  2. Data Collection Analyst, Contract

    Pro Football Focus Remote Oct 2022 to Sep 2023

    • Logged and validated thousands of NCAA plays at 98% accuracy in PFF's proprietary tools, contributing to analytics products used by 200+ college programs.
    • Reduced data-review turnaround time by roughly 10% by identifying workflow bottlenecks and proposing edge-case rule clarifications to leads.

  3. Customer Service and Sales Representative

    Outlook Services San Antonio, TX Sep 2018 to Jun 2020

    • Consistently exceeded quarterly sales targets in a high-volume phone sales environment, securing new business through outbound prospecting while maintaining a 90% quality score.

I build the things I sell

StatSnap

A full-stack NFL analytics app serving advanced metrics (EPA, target share, CPOE) that are normally paywalled.

React frontend, Express and MongoDB Atlas API, and a Python ETL pipeline ingesting 10 seasons of data (~5,900 records), automated weekly via GitHub Actions and cached to insulate users from third-party API downtime.

Open the live app Read the code

Stack
JavaScript, Python, SQL, REST API design, MongoDB, React, Node.js, Git and GitHub. Currently in a software engineering externship working in TypeScript, GraphQL, and AWS within a Scrum team.
Education
BBA in Cyber Security and Information Systems, University of Texas at San Antonio, cum laude. Full-stack software engineering bootcamp, TripleTen, 2026.