Last-minute Halloween costumes for tech nerds

We are late into October, and if you are anything like the founders I talk to daily, you probably forgot Halloween exists. You have been too busy staring at terminal windows, arguing with LLMs that refuse to follow instructions, or trying to figure out why your burn rate looks like a heart monitor. But the party invites are here, and showing up as 'a guy who works in tech' isn't a costume anymore; it is just a cry for help.

The Pivot to Agentic Aesthetic

For those of us building in the AI space, the most obvious costume this year is the AI Agent. But I am not talking about a robot suit with tinfoil. I am talking about the specific, deceptively cute iconography that companies like Anthropic and OpenAI use to mask the fact that their software is trying to automate us out of a job.

To pull this off, you need to lean into the minimalism. Put on a plain white shirt, grab a cardboard cutout of a friendly, non-threatening spark or a circular blob, and walk around asking people for their API keys. The joke here is the contrast. We build these tools to look friendly and approachable because the reality—an autonomous agent spending your cloud budget while you sleep—is actually terrifying. For builders, this is a nod to the UX challenges we face. How do we make something powerful enough to run a company but simple enough that a user does not feel like they are staring into the abyss?

The Biohacker Burnout

If you want to lean into the 'Founder' lifestyle, there is always the Bryan Johnson route. This is probably the easiest costume to execute if you are already sleep-deprived and spending too much money on supplements. Grab a black t-shirt, carry a bottle of green juice that looks like swamp water, and tell everyone you are currently in the middle of a two-hour wind-down routine that involves zero blue light and a cooling mattress.

The subtext here is the obsession with optimization. In our world, we try to optimize every line of code, every database query, and apparently, every single cell in our bodies. It is a commentary on the extreme lengths we go to just to keep the machine running. If you choose this, make sure to look slightly annoyed whenever someone offers you a drink that contains sugar. It is part of the character.

Legacy Code Horror Stories

For the developers who have been in the trenches since before the AI hype cycle, there is nothing scarier than a PHP vulnerability. This is the 'slasher movie' equivalent for software engineers. While the world is worried about AGI taking over, most of the internet is still held together by aging PHP scripts and duct tape.

To dress as a vulnerability, you just need to look like chaos. Wear a shirt with a SQL injection string or a deprecated function name. This is a costume for the people who actually know how things work under the hood. It is a reminder that while we are building shiny new toys on top of the stack, the foundations are often crumbling. It is a builder-first costume because it acknowledges the technical debt we all pretend does not exist until the server goes down at 3:00 AM.

The Empty Cloud Budget

If you want to be truly terrifying to your VCs, go as a depleted runway. This is a minimalist costume. You do not even need props. Just walk around with a panicked expression, checking a fake dashboard on your phone every thirty seconds. When someone asks who you are, tell them you are a startup that just spent its entire Seed round on H100s without a clear product-market fit.

This is the reality of the 2024-2025 cycle. We are seeing a lot of capital being thrown at compute power with very little to show for it in terms of actual revenue. It is the modern-day ghost story. 'And then, the founder realized... the inference costs were coming from inside the house!'

What This Means for the Rest of Us

Halloween costumes in tech are usually a reflection of our collective anxieties. A few years ago, everyone was a Bored Ape or a failed crypto exchange. Now, we are pivoting toward the weird intersection of human biology and machine intelligence. We are joking about agents and biohacking because those are the things currently consuming our lives.

For builders, these costumes are a way to signal that you are 'in the know' without having to explain your LinkedIn bio to a civilian. It is a shorthand for the specific brand of stress we have chosen. Whether you are dressing as a friendly AI icon or a literal security flaw, the goal is the same: to acknowledge that this industry is absurd, high-stakes, and occasionally ridiculous.

• Focus on the inside joke: The best tech costumes require a specific level of knowledge to understand.
• Keep it low effort: If your costume takes more time to build than your MVP, your priorities are wrong.
• Lean into the dread: The most effective costumes this year play on the fear of automation or the collapse of legacy systems.

Ultimately, the costume you choose says a lot about where you sit in the ecosystem. Are you the one building the agents, the one trying to secure the legacy code, or the one trying to live forever so you can see how it all ends? Whatever you choose, just make sure you can still type in it. You never know when a server will decide to crash during the party.

The irony of tech Halloween is that we spend all year trying to build the future, only to spend one night pretending to be the very things that keep us up at night.

So, take the easy route. Be the agent, be the vulnerability, or be the biohacker. Just don't be the guy who shows up and talks about his roadmap all night. That is the scariest costume of all.

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