The question most people ask is which board has the most jobs. It is the wrong metric. The large aggregators have the most listings precisely because they scrape everyone else, which means the same role reaches you three times, days after it was posted, alongside listings that closed a month ago.

The metric that matters is freshness relative to competition. A posting you see within 48 hours of it going live, on a channel most applicants do not watch, is worth more than fifty listings you see a week late.

What each channel actually is

Large aggregators

Search engines over other people's postings. Enormous coverage, the worst freshness, the highest competition, and the most duplicates and expired roles. Useful for one thing: discovery. You find out the role exists, then apply somewhere else.

Professional networks

Better freshness, because employers post directly, and a genuine advantage — you can see who you know at the company before you apply. Competition is heavy on anything with a visible applicant counter, so treat a high count as a reason to find a referral rather than a reason to give up.

Niche and industry boards

The best ratio of quality to competition, and the most underused. Professional bodies, industry publications, specialist communities, and the job channels inside groups you already belong to. Volume is low; relevance and response rates are high. Two or three in your field beat every aggregator combined.

Employer career pages

Where the posting is canonical, complete and current. If a role has been filled, pulled or put on hold, the employer's own page reflects it first. Applications here go into the system the recruiter actually reads, without the routing losses of an aggregator's one-click apply.

Recruiter inboxes

Not a board, but a channel worth counting. Three or four specialists in your niche will tell you about roles before they are advertised. Thirty generalist agencies will tell you nothing.

Duplicates, staleness and how to check

A single vacancy can appear as a dozen listings across aggregators, agency reposts and syndication feeds. Two habits fix most of it.

First, always trace a listing back to the employer's own careers page before applying. If it is not there, the role is either agency-mediated, already closed, or was never a distinct vacancy. Second, check the posting date on the source, not on the board — aggregators frequently display the date they indexed the listing, which can be weeks after it went live.

Ghost jobs and how to spot one

Some proportion of live listings are not immediately fillable, usually for ordinary reasons: a requisition opened before budget is signed, a role held open while an internal candidate is assessed, a pipeline-building posting, or a listing nobody remembered to take down.

Signals worth weighing, none decisive alone:

  • The posting has been continuously live for more than eight to ten weeks in a function that is not high-turnover.
  • It reappears every few weeks with the same text and a reset date.
  • The description is generic enough to fit four different jobs, with no team, manager or project named.
  • No salary band anywhere, in a market where bands are common or legally required.
  • The employer has announced a hiring slowdown while the listing stays up.
  • The company's own careers page does not carry it, but three aggregators do.

Two or three together is a reason to deprioritise, not to boycott. The cheap test is a short message asking whether the role is actively interviewing. A non-answer is an answer.

The order of operations

Use aggregators and networks to discover roles, not to apply to them. Once you find something, go to the employer's own careers page, apply there, and spend the saved time identifying one person at the company to contact. Discovery and application are different jobs, and the best tool for each is different.

Alerts that are narrow enough to be useful

A broad alert is a second inbox you learn to ignore. The goal is five to fifteen results a day that you actually open.

  1. Set three to five narrow alerts, not one wide one. One per target title variant, each with a location or remote filter.
  2. Use the exact titles employers use, not the title you want. Take them from postings you already like, and include the common variants for the same job.
  3. Add a salary floor or seniority filter where the board supports it. It removes more noise than any keyword.
  4. Choose daily digests over instant alerts for everything except your two highest-priority queries.
  5. Prune monthly. Any alert you have not opened in two weeks is deleted, not tuned.

Applying early matters more than most candidates assume. A large share of applications to a posting arrive in the first few days, and many shortlists are assembled before the advertised closing date. An alert that reaches you on day one is worth more than a better CV on day fourteen.

The board is not where you get hired. It is where you find out the job exists — and everything that improves your odds happens after that point, somewhere else.

A note on markets

Board ecosystems are local. Salary transparency rules, the dominance of particular national boards and whether agencies or employers control most advertising all vary by country. The structural advice holds — trace to source, prefer niche, apply early — but which specific boards matter in your market is a question for people working in it.