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

We are a diverse team of talented engineers, designers, and product managers from 10+ countries and five continents around the world. United in our passion for creating outcome-focused software solutions, we build products as if they were our own. Curious to see what we have built and who we have worked with? Check out our portfolio.

  • Team retreat

    Once a year the entire Theorem team gets together at an inspiring location to meet, work and play.

  • Healthy body, healthy mind - happy team.

    Healthy body, healthy mind - happy team. We offer paid vacation and support healthy lifestyles through our physical fitness benefits program.

  • Healthcare & finance

    We have comprehensive medical, dental, vision, and life insurance plans, plus we have a 401k plan.

  • Do you like challenges?

    We solve complex problems for some of the biggest brands in the world. It's not easy, but it is rewarding.

  • Do you self-manage?

    We only hire A+ players. We give you the freedom to get your job done and the accountability that inspires you to deliver.

  • Are you a startup junkie?

    We believe that startups are a state of mind. We all pick up the trash and we all contribute to the vision. We mix client work with our own internal products - so you'll never get bored.

Sound like a perfect fit? Then we'd like to get to know you.

Current Openings


    Theorem expects all team members to be honest, trustworthy, and operate with integrity. Discrimination and all unlawful harassment (including sexual harassment) in employment is not tolerated. We encourage success based on our individual merits and abilities, and all decisions regarding recruitment, hiring, promotion, compensation, employee development decisions such as training, and all other terms and conditions of employment, are based on business needs, job requirements and individual qualifications without regard to race, genetics, nationality, national origin, citizenship status, employment status, ethnicity, ethnic origin, color, creed, religion, belief, age, family or parental status, pregnancy, marital status, sex, gender, sex or gender assigned at birth, gender identity, sexual orientation, sexual preference, lifestyle, social class, military status, disability, hairstyle, physical features, or any other other status protected by the laws or regulations in the locations where we operate. We oppose all forms of unlawful or unfair discrimination. Theorem encourages applicants of all ages. Theorem is an equal opportunity employer.

    No statements by Theorem are intended to create an offer of employment unless made in writing, signed by an officer of the company and no offer shall become effective unless countersigned by the prospective employee.

    Note to Recruitment Agencies: To protect the interests of all parties, Theorem will not accept unsolicited resumes from any source other than directly from a candidate. Any unsolicited resumes sent to Theorem, including unsolicited resumes sent to a Theorem mailing address, fax machine or email address, directly to Theorem employees, or to Theorem’s resume database will be considered Theorem property. Theorem will NOT pay a fee for any placement resulting from the receipt of an unsolicited resume. Theorem will consider any candidate for whom an agency has submitted an unsolicited resume to have been referred by the agency free of any charges or fees.