Nobody invoices you for an empty chair, so it goes in the budget as zero. That is the only reason a senior role can sit open for five months without anyone treating it as an emergency. The work does not stop when the seat is empty. It gets absorbed, delayed, or done worse by people who already had a full week, and none of that shows up as a number anyone reports.
The roadmap does not shrink, it stretches
When a senior engineer leaves or a new role goes unfilled, the first thing that happens is not that work disappears. It is that everything moves right. The thing that was going to ship in six weeks ships in eleven. The migration that was scheduled gets deferred to next quarter, and then the quarter after, because the person who was going to lead it is now covering two areas. None of this appears in a vacancy report. It appears eighteen months later as a platform nobody wants to touch.
Your strongest people pay for it first
Cover gets allocated to whoever is most capable of absorbing it, which means your best engineers get the extra load by default. They rarely complain about it at first. They complain about it by leaving, usually about four months in, and usually the stated reason is something else. Then you have two open reqs instead of one, and the second is harder to fill than the first was.
Decision quality drops quietly
A team under sustained cover pressure stops making the slower, better decision. Reviews get shorter. The obvious fix wins over the correct one. Nobody writes the design doc because there is no room in the week for it. This is the most expensive part of a long vacancy and the hardest to see, because the individual decisions all look defensible and only the sum of them is a problem.
The hidden cost of holding out for the local hire
Most long vacancies are not caused by a shortage of capable engineers. They are caused by a shortage of capable engineers inside one commuting radius, or one time zone, or one narrow band of what a hiring process is set up to recognise. Widening the search feels like lowering the bar. Usually it is the opposite: it is the only way to keep the bar where it is and still fill the seat this quarter.
What the alternative actually looks like
A direct engagement with an engineer in Central Europe changes the cost structure rather than the quality of the work. The engineer is paid like a western engineer instead of a local one, which is why strong people take these roles at all. The company pays less in total than a domestic hire, because employer payroll tax, health, dental and vision, the retirement match, equity, office and equipment, and the recruiter margin are simply not in the arrangement. Neither of those comes out of the other. Both are true at once because the saving is structural, and because nobody sits in the middle taking a recurring cut.
How to price the wait honestly
Take the delivery you have deferred since the role opened. Add the attrition risk on the two people currently carrying the load. Add the decisions your team made fast because they had no room to make them well. Compare that against the total cost of a direct engagement starting in one to two weeks. The comparison is rarely close, and it is almost never the one that gets made, because the empty seat does not send an invoice.
We introduce engineers in one to two weeks, with a written assessment of each one. See how it works.