The shape of technical hiring is changing fast. Adzuna has seen a 30% drop in UK entry-level job postings since ChatGPT's launch, with graduates facing the toughest job market since 2018 techUK – What's actually happening with entry-level and graduate jobs?. The pressure is sharpest in tech itself: the UK tech sector cut graduate jobs by 46 percent in the past year, with a further 53 percent drop projected, according to figures from the Institute of Student Employers The Register.
At the same time, demand for AI capability is climbing. Demand for AI skills increased nearly 200 percent in a year, with London accounting for 80 percent of AI-related job postings and nearly two-thirds of all technology vacancies in the UK The Register (Accenture data). So the market is not shrinking. It is re-pricing. The work that used to justify a junior headcount is being absorbed by agents, and the demand is moving up the stack towards the people who direct them.
When agents can produce working code in minutes, the scarce skill stops being typing the code. It becomes designing the interlocks: the checkpoints, hand-offs and guardrails that decide what an agent is allowed to do, when a human reviews it, and how the whole system stays accountable. Think of it like the safety interlock on a machine. It is the deliberate control that stops the next step until the right condition is met.
This matters because the entry-level ladder that used to train these judgements is narrowing. In engineering, entry-level hiring has fallen to -19% while senior hiring sits at -10%, a 9-percentage-point gap GOV.UK - A snapshot of entry-level hiring in the UK. Fewer juniors means fewer people learning the trade the old way, so the interlock designer carries more of the system's judgement. The job is less about writing every line and more about knowing where human review has to sit, what good looks like, and how to catch an agent's confident mistake before it ships.
Start by hiring for judgement, not keystrokes. The person you want can read an agent's output critically, spot where it is plausibly wrong, and design the review step that catches it. Interview for that directly: give them a flawed AI-generated solution and ask where they would place the checks.
Then widen your definition of a route in. Apprenticeships have risen from 3% of AI hires in 2020 to 19% in 2025 GOV.UK / DSIT – AI Labour Market Survey 2025 report, which shows employers are already building this capability rather than only buying it ready-made. Combine a few experienced interlock designers with trained-up people who understand your systems. Finally, test for communication: interlock design is as much about agreeing hand-offs between teams and agents as it is about the technical control itself.
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