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

        • 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

        • Kelly Huang

          Product Manager

          • Erik Schmidt

            Product Manager

          • David Glidden

            Product Manager

          • Dan Blumberg

            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

          • Siska Hines

            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

          • Hernan Sartorio

            Software Engineer

          • Chad Ostrowski

            Software Engineer

          • Giannis Tziligkakis

            Software Engineer

          • Dimitar Valchanov

            Software Engineer

          • Janko Marohnić

            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

          • 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