What if the biggest problem in hiring isn't finding qualified people—but helping employers make sense of the thousands of applications already sitting in front of them?

Most conversations about the future of hiring focus on skills, AI, resumes, or credentials. But underneath all of those discussions is a much more fundamental question:

How do job boards actually decide who sees opportunity?

Job boards have quietly become one of the most influential recommendation systems in the labor market. Every day they determine which jobs appear in front of millions of people and which candidates employers are most likely to notice. Yet most of us still think of them as digital bulletin boards.

They're anything but.

In this episode, Ian Davidson sits down with Matt Plummer, Chief Product Officer at Appcast, to understand what modern job marketplaces are actually trying to optimize—and why richer candidate data alone isn't enough to change hiring.

One of the biggest surprises from the conversation is that employers aren't asking job boards for more information about candidates.

They're asking for fewer applicants.

Matt explains why job seekers won't tolerate repeatedly rebuilding their professional identity across every platform they use, forcing marketplaces to make recommendations using incomplete information. He also explores how richer signals—skills, credentials, projects, certifications, and verified experiences—could dramatically improve matching, but only if enough people possess them and enough employers can actually consume them.

It's a conversation about incentives, scale, recommendation systems, and one of the largest hidden constraints shaping opportunity today.

Along the way, Ian and Matt discuss:

• Why application overload has become one of hiring's biggest problems
• How job boards balance supply and demand across labor markets
• Why recommendation quality depends on context—not simply more data
• What richer candidate signals could make possible
• Why adoption, not technology, is often the hardest challenge
• How future hiring systems may evolve beyond today's resume

This conversation is also an important milestone in Signal Mapping, Signol Labs' ongoing investigation into the signals employers use throughout the hiring process.

Earlier episodes explored how hiring managers evaluate people, how recruiters scale judgment, and how applicant tracking systems filter candidates. This episode shifts upstream to the marketplaces responsible for connecting people with opportunity in the first place.

Understanding those systems helps answer a much larger question:

If we can improve the information flowing through labor markets, can we improve opportunity itself?

About Matt Plummer

Matt Plummer is Chief Product Officer at Appcast, one of the world's leading recruitment marketing platforms. He has spent years building technologies that help employers reach candidates more effectively while balancing the realities of modern hiring at enormous scale.

About The Signal Lab

Hosted by Ian Davidson, Founder and CEO of Signol Labs, The Signal Lab explores the systems connecting learning and work—from hiring technology and workforce development to digital credentials, AI, and labor market infrastructure.

If your organization is thinking about hiring technology, workforce strategy, Learning and Employment Records, digital credentials, or the future of talent marketplaces, we'd love to continue the conversation.

Learn more at SignolLabs.com