Since March, I've been obsessed with getting a summer internship at Slash. I wanted to write down why, partly to clarify my own thinking and partly because I think Slash is doing something that most people in the industry haven't fully caught on to yet.
HALO
There's a term going around for companies that are high asset, low obsolescence, HALO. Most startups right now are not HALO. They are one prompt away from being replicated, and on some level, they know it. The SaaS market is scared, and rightfully so. If your whole product is a UI wrapped around an API, a coding agent can ship a clone in a weekend.
Slash is in a completely different bucket, though. You can vibe-code Trello, but you cannot vibe-code Slash. The moat isn't the code, it's access. Slash has the necessary banking partners, licenses, KYC/KYB/PCI infrastructure, and years of transaction data that could be used for training AI models.
None of this can be replicated by an agent. It takes years of compliance work, regulatory approvals, and building relationships with card networks. An LLM cannot get you a sponsor bank.
So when the rest of the industry is bracing for impact, Slash gets to use AI as pure upside. Build faster, ship more, capture the ground that scared SaaS companies are leaving behind. That's the position I want to be in.
Leap-frogging
Legacy banks have a hard time adopting new technology quickly. It's not a skill issue; it's structural. Decisions go through committees. Compliance cycles take quarters. Changes mean working around 20-year-old code. By the time a traditional bank embraces stablecoins, a fintech has already shipped, iterated, and launched v2.
Slash is already ahead in modern technologies. Stablecoins are live. AI is driving internal productivity. And now there's an MCP server out in the wild (+ Twin), which positions the company for the agentic economy before most people understand what that even means.
Slash was founded in 2022 and passed $3B in annualized card volume by 2025. With fewer than 50 people. That kind of speed isn't an accident. It's what happens when you don't have to drag a legacy core banking system along with you.
Vertical banking (and why I've seen it work)
I used to work as a Software Engineer at Venezolano de Crédito, one of the older private banks in Venezuela. The codebase was huge, the bureaucracy heavier, and most days were spent fixing bugs rather than shipping anything new. Innovation in that environment mostly meant catching up to what US banks did five years ago.
But I did see glimpses of what Slash is doing at scale. When we wanted to land a big client like Bigott, we built custom features for them, faster than any other bank in the country. Behind those features was a team of five undergrads working overnight to make it happen. It was inefficient and unsustainable, but it worked. Those clients stayed for years because the product was shaped to them specifically.
That's the whole thesis of vertical banking, and with AI, the economics of it change completely. You no longer need five people burning themselves out for one client. You can cluster hundreds of leads, understand their workflows, and ship tailored features in hours. The "Who we're built for" section on Slash's landing page is going to keep growing, and I want to be part of that growth.
A Venezuelan founder
This one is personal. I've been paying attention to the startup world since I was around 18. Reading TechCrunch from Caracas, listening to every a16z and YC podcast I could find, learning the names of every accelerator and which partners did what. From where I was sitting, Silicon Valley felt like a thing that happened to other people.
Then I started noticing Victor on my feed. Caraqueño, YC, Thiel Fellow. Probably ate perros calientes in Las Mercedes at the same spots I did. Possibly participated in the same protests as me. Seeing someone from your city build something this big fills you with a pride that's hard to explain. It's the kind of thing that made me go from following the startup world to actually wanting to be in it. That's a big part of why Slash isn't just another company to me.
Engineering team
Last I checked, Slash's engineering team is ~15 people. At $150M in annual revenue, that's $7.5M generated per engineer. That is absurd. I want to learn from people who can do that.
I've read most of the Slash engineering blog, especially The Facelift and more recently their post about their new mobile app. What stands out is how the team thinks about working with AI. There's a line in there about when to get granular and when to step back and orchestrate, and that's the exact skill I'm trying to develop right now. I spend more time writing .md specs than I do writing code, and I've already learned the hard way what happens when those specs are sloppy. Bad planning means scrapping whole features and starting over. Good planning means an agent does in an hour what used to take a day.
Getting mentored by engineers who have internalized that loop and scaled it to production systems is the kind of environment you can't pay for.
Culture
Just look at this video from Mason, come on:
There's an energy in the air
High energy, young team, fully in-person, obsessed. Everyone has a say, everyone's opinion is valued equally, and everyone is accountable for what they build. I like the fact that the engineer who built the feature is the one who ships it publicly.
Meritocracy matters to me. It's the whole reason I came to the US in the first place, and Slash feels like the purest version of that. From the outside, Slash reads as stubborn in the best way. The team doesn't stop until things go the way they want.
The only reason @slashapp has been successful is because we have exclusively hired retardmaxxers. I think we were doing like 80m in revenue when we first got a CRM. All of us just come to work and code or sell extremely aggressively every day. That's it. Over and over again.
Final thoughts
Honestly, I'd take this internship for free. Compensation is not what I'm looking for. What I want is to be in the room with people who are moving the industry forward, learn as much as I can, and help push Slash toward that $5B annual revenue.