If you are coming from a more established technology company and you are not looking for an aging startup environment, this will likely disappoint you. You are used to larger organizations with smart people who make logical decisions. There are checks and balances that keep large orgs with good products and market viability in a positive trajectory. This is not that. Instead of making decisions on behalf of future success, many people in power like to go on power trips and set up the company to fail. Read other reviews here.
Do your research in the ad tech space. Look at the companies that grow year over year. Dollars are flowing to the companies that have viable solutions for advertisers. Also look into what type of investments ad tech companies take. Some go public (IPO), some get venture capital, some take private equity. Those investments are not all equal. This information is available with a quick Google search.
Do you want to work long hours, make meaningful changes in your small sector of responsibility, and be a positive change agent but never receive any praise or reward? You might enjoy it here.
MediaMath is medium sized business. That gives senior leadership an unhealthy amount of power. They are a group of like minded individuals that like each other and their own ideas. They do not like outsiders. They do not like to hear constructive criticism. They are quick to adopt a trend or mindset without deep thinking. The middle manager sector of the company is large and unwieldy.
Do talk to current or ex employees. Do the same for other ad tech companies. Ad tech firms are struggling as most marketing dollars go to the top three companies. Be aware of double-speak in your interviews. Are they just talking to talk? Are they saying anything of value in succinct sentences?