Formerly Citrusbyte, we are now Theorem. Read our story.

Mission driven, people focused

We work with large enterprise organizations and startups to solve their business challenges by identifying, designing and building innovative software solutions.

We are a team of strategy, design and development experts united by our passion for building human-centered, outcomes focused software. From concept to launch we apply startup-style customer development and agile engineering to creating new products and areas of business.

Meet The Theorem Team

  • Brady Brim-DeForest

    CEO

    Believes that every company must become a technology company.

  • Will Jessup

    Founder, Head of Services

    Believes that focusing on people and how we work is the key to building great things.

  • Alex Finnemore

    Head of Revenue

    Enjoys using technology to solve complex business problems.

  • Lucas Nasif

    Director of Engineering

    Cultivates engineering leadership through a passion for client service and simplicity.

  • Alex Zapadenko

    Design Manager

    A young design leader with ten years of hands-on experience in various design fields. Provides the very best design services to customers as well as fosters in-house design team.

  • Christopher Clark

    Manager, Product Management

    Believes technology can change the world for the better.

  • David Kullmann

    Partner

  • Mike Joyce

    Client Partner

  • Adonya Ourshalimian

    Client Partner

  • Alison Dean

    VP of Operations

  • Jonathan Williams

    Vice President - Accounts

  • Andrew Upah

    Head of Marketing

  • Eric Letellier

    Business Development

  • Michel Charlery

    Financial Controller

    • Tatiana Barrera

      Bookkeeper / Executive Administrator

    • Sandra Plascove

      HR Coordinator

      • Kristen Williams

        Talent Recruiter

      • Theresa LeMaitre

        Recruiting Assistant

        • Federico Saravia

          Engineering Manager

        • Aaron Greenlee

          Engineering Manager

        • Jesse Read

          Engineering Manager

        • Josh Coulter

          Engineering Manager

        • Jonathan Horowitz

          Head of Research

        • Alison Welwood

          UX Researcher

        • Sarah Wallace

          UX Researcher

        • Kristin Peterson

          Product Manager

        • Adam Polak

          Product Manager

        • Eric Chambers

          Product Manager

        • Nathaniel Maughan

          Product Manager

        • Sara Taillon

          Product Manager

        • Erik Schmidt

          Product Manager

        • David Glidden

          Product Manager

        • Dan Blumberg

          Product Manager

        • Rory Craig-Barnes

          Product Manager

        • Steve Van Mierlo

          Product Manager

        • Amy Kopischke

          Product Manager

        • Charly Prioglio

          Product Designer

        • Pablo Franco

          Product Designer

        • Adrian Balkwill

          Product Designer

        • Maria Rotariu

          Product Designer

        • Jolo Santos

          Product Designer

        • Jon Lehman

          Product Designer

        • Sarah Kozlowski

          Product Designer

        • Sam Small

          Product Designer

        • Axel Lessio

          Product Designer

        • Joe Bossalini

          Solutions Architect

        • Piotr Solnica

          Solutions Architect

        • Mike McTiernan

          Solutions Architect

        • Chris Trott

          DevOps Engineer

        • Andrew Filatov

          DevOps Engineer

        • Sean Fortner

          DevOps Engineer

        • Don Becker

          DevOps Engineer

        • Lucas Ewalt

          DevOps Engineer

        • Stephen Lawrence

          DevOps Engineer

        • Matías Flores

          Software Engineer

        • Matías Aguirre

          Software Engineer

        • Sarah Henkens

          Software Engineer

        • Luis Guardiola

          Software Engineer

        • Josh Hollenbeck

          Software Engineer

        • Leandro López

          Software Engineer

        • Lautaro Orazi

          Software Engineer

        • Joe McIlvain

          Software Engineer

        • Alex McLain

          Software Engineer

        • Brett DeWoody

          Software Engineer

        • Chad Ostrowski

          Software Engineer

        • Giannis Tziligkakis

          Software Engineer

        • Dimitar Valchanov

          Software Engineer

        • Abelino Romo

          Software Engineer

        • Lucas Tolchinsky

          Software Engineer

        • Arturo Cullinane

          Software Engineer

        • Denis Sokolov

          Software Engineer

        • Andrea Pigato

          Software Engineer

        • Robert Peterson

          Software Engineer

        • Haim Gelfenbeyn

          Software Engineer

        • Alfredo Ramirez

          Software Engineer

        • Mariano Abdala

          Software Engineer

        • Eugene Howe

          Software Engineer

        • David Kershaw

          Software Engineer

        • Devin Sackett

          Software Engineer

        • Brian Pruitt-Goddard

          Software Engineer

        • Jordan Papaleo

          Software Engineer

        • Thomas Klemz

          Software Engineer

        • Gregory Kenenitz

          Software Engineer

        • Keith Meehl

          Software Engineer

        • Ryan Hightower

          Software Engineer

        • Matías Matteucci

          QA Engineer

        • Agustin Tomas Larghi

          Android Engineer

        • Philippe Boudreau

          iOS Engineer

        • Nico Miyasato

          iOS Engineer

        • Ezequiel Becerra

          iOS Engineer

        Some fun facts

        • Nationalities represented

          13

        • Applications delivered

          483

        • Meetups hosted

          56

        • Open source projects

          7