Mark Eggensperger, Developer in New York, NY, United States
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Mark Eggensperger

Verified Expert  in Engineering

Software Developer

New York, NY, United States
Toptal Member Since
June 21, 2021

Mark's primary work experience includes being the head of operations and product manager for a tech startup as well as several years of management consulting. He has an industrial engineering degree and an MBA from a top-10 institution. Mark is now pursuing his passion for software engineering and excels at building React-based progressive web applications.



Preferred Environment

JavaScript, React, Redux, Firebase, Python 3, Cloud Firestore, React Native, Expo, Express.js, SQL

The most amazing...

...skill I have is my background; thanks to a degree in industrial engineering, I bring process design expertise and a keen eye for innovation and brand strategy.

Work Experience

Head of Operations

2018 - 2021
Nomi Beauty
  • Acted as a product manager for a mobile beauty startup that catered to the travel industry by overseeing product enhancements, defining the roadmap, and ensuring a unified strategy across the executive team.
  • Managed a team of six and oversaw strategy and operations, including program management, human resources, finance, analytics, sales, client relations, customer support, and daily operations.
  • Oversaw the strategic direction of the flagship product to achieve a 42% revenue growth year over year.
  • Wrote out PRDs and teamed up with CTO to ensure all updates met specifications and release deadlines.
  • Discovered that 11% of monthly revenue was lost due to operational errors and implemented standardized process changes to achieve a 57% reduction in lost revenue.
  • Audited accounts receivable and uncovered that 20% annual revenue was outstanding; then coded an invoicing tool for organized and improved process, bringing the A/R balance to less than 1% of annual revenue.
Technologies: SQL, Excel VBA, Tableau

Management Consultant

2011 - 2018
Premier, Inc.
  • Generated $29 million in annual savings for a multibillion-dollar health system by developing a VBA-coded tool that allowed the SVP of labor to consistently identify problem areas and focus cost reduction efforts.
  • Led the analytics on a cross-functional consulting team of 20 in the builds of several VBA-based tools.
  • Enhanced several processes through SQL and VBA coding—reducing the time by 80%.
Technologies: SQL, Excel VBA

Data Consultant

2011 - 2013
  • Maintained relationships with over 85 hospitals (users) on using proprietary productivity software.
  • Enhanced several processes through SQL and VBA coding, creating up to 80% reduction in time.
  • Conducted final software testing to ensure all updates were working from user perspective before roll-out.
Technologies: Excel VBA, SQL, Excel 2010

Ask the Bartender
I built a progressive web app that hosts a self-made algorithm that determines the best cocktail to recommend to a user based on their response (e.g., they liked it, hated it, or were indifferent) to various flavor tags (e.g., sweet, spicy, and sour).

The tech stack included JavaScript, Firebase, Express.js, Sequelize, React, Redux, Axios, and SQL.

WanderedOff allows users to create and invite friends to a session. It has multiple features that help facilitate the sessions, including a real-time location is displayed for all users in the session, the center point moves along with location updates, and the other users in the session are notified when one user falls outside of range.
2015 - 2017

Master of Business Administration (MBA) Degree in Business Administration

NYU Stern School of Business - New York, NY, United States

2006 - 2011

Bachelor's Degree in Industrial Engineering

Montana State University - Bozeman, MT, United States


Software Engineering Certification

Fullstack Academy


React, Google Maps API


Tableau, Expo, Excel 2010


Redux, React Native, Express.js


JavaScript, SQL, Excel VBA, Python 3


Six Sigma, Behavioral Design, Human-centered Design (HCD)


Cloud Firestore



Industry Expertise



Lean, Process Flows, Ergonomic Design, Simulations, Operations Research, Entrepreneurship, Innovation, Product Management, Brand Development, Strategy, Statistics, Experimental Design, Sales

Collaboration That Works

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