James Reggio
CTO, Brex · 1 appearance on the record.
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executiveengineeroperatorfounder@jamesreggio ↗LinkedIn ↗brex.com ↗
James Reggio is the Chief Technology Officer at fintech company Brex, where he oversees engineering and spearheads technical architecture and autonomous AI agents. Before becoming CTO in 2024, he held engineering roles at Microsoft, Twitter, and Convoy, and co-founded the podcast app Banter.
38statements → 5claims → 1claims resolved → 3.89/5average certainty → 1.92/5average debate potential → ≈4.5/5argument clarity, estimated →
0 supported 1 partly supported 0 contradicted 4 not checkable as stated how the 5 claims stand · each chip opens the sources
5 assertions · 2 opinions · 10 insights · 21 disclosures · every statement was checked. The predictions and assertions are the 5 claims: statements the public record can support or contradict. 1 is resolved, and 4 name no date, number or outcome precise enough to check. Everything else (opinions, insights, what ifs, disclosures) can never be settled by the record, so it carries no assessment.
The record, in short
What the tape says about how James argues and how the claims held up. Everything they said, and everything said about them, is in the tabs below.
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We measure speaking style by listening to the audio itself, and a fair number needs at least 2,000 words from one person on tape we have measured. There is too little of James Reggio on measured tape to publish a rate. This says nothing about how they speak.
Everything James Reggio said on Latent Space that made the record, most notable first. Filter by type, assessment or year in the ledger →
Reggio: MCP belongs on conventional systems, not inter-agent communication
“I think of like the MCP and tool usage as being like the interface to all of our conventional imperative systems, not at the AI space.”
Reggio: Simple web research agents outperformed RL for credit underwriting at Brex
“We made this big investment. We were working with some outside, like the, like a company that specializes in this and the performance we ended up getting was inferior to just building a, like a web research agent.”
Reggio: Tens of thousands of ROI-negative SMB customers almost threatened Brex
“It ended up being a huge burden for the business almost existential for us to have those tens of thousands of customers that all were ROI negative.”
Reggio: Brex engineering interview revamp makes agentic coding mandatory
“We adapted our interview loop to be more AI sort of agentic coding native. So instead of we had like a coding and a system design question that we basically have revamped into a project where we'll give you like a brief, Before you come on site and then like a…”
Brex forced all existing engineers to pass its new AI interview
“As soon as we had the interview ready to ship, we started, we said everybody in engineering, including all the managers are going to have to go through this interview. And so we re-interviewed everybody internally.”
Reggio: Agentic development amplifies bad architecture, yielding less net capacity increase
“I view agentic development as being something that amplifies all the good, just as much as it amplifies all the bad. And it amplifies sloppiness, poor architectural thinking misunderstanding of the requirements. Like there are, for all of the acceleration of g…”
Reggio: Constraining LLMs to deterministic DAGs undersells their planning power
“My intuition has been that trying to craft LLMs into deterministic workflows and DAGs is, is kind of underselling like the power that they have to actually plan and execute more in a more sophisticated, like fluid way.”
Reggio: Deep Domain Experience Can Impede AI-First Problem Solving
“I think part of it is like sometimes the too much experience or too much knowledge of how to solve a problem and actually be an impediment to thinking differently about it and thinking about it from like an AI first lens.”
Brex replaced human KYC underwriting with automated web research agents
“We've we set up a completely automated Pipeline for evaluating customer applications to get them onboarded instantly to Brex, which is something that used to require human intervention either for underwriting or KYC. But now we basically have a series of agent…”
Reggio: Agentic coding has significantly shortened the half-life of code
“Because the half-life of code has declined so significantly with agentic coding. It's actually quite, ah, easy for us and for anyone else to kind of try on for size, a variety of different pieces of tech to figure out what is going to be most ergonomic for sol…”
Brex built a custom framework where sub-agents direct message each other
“We kind of just hit the eject button and built our own framework, which is one in which we have agents that are able to basically DM with other agents and have multi-term conversations amongst themselves to coordinate to complete a task to or like to complete …”
Reggio: Multi-turn agent interaction beats treating sub-agents as single tool calls
“There's actually a lot of value in having like multi-turn conversations from like the orchestrator or the assistant to like the sub agent, whereas like, you know, a tool call is basically just like one RPC.”
Brex launches 'Quitters Welcome' recruiting pitch encouraging future founders
“We actually launched sort of like a new recruiting and employee value proposition for Brex a couple months ago called Quitters Welcome, where we actually intentionally are leaning into this idea that we have a disproportionate number of folks who go on to beco…”
Brex formed a 10-person internal AI team to disrupt its product
“And AI is one of those areas where we have another team of
Just roughly about 10 people who are focused primarily on LLM applications, and we wanted to create a bit of a separation there because the way that we were thinking about this, and this is actually so…”
Reggio: The Ideal Brex UX Is Just Swiping the Card
“Like the best UI UX for Brex is just the card. Like every single thing that you have to do in the software beyond just swiping the card is like an opportunity for AI to eliminate some work for you.”
Reggio: Multi-agent systems work best when structured like human org charts
“It's actually helpful for us to basically conceive of it as an org chart. And like, it's the agent org chart with you know, my EA is DMing other specialists and having brief conversations to support me as their client.”
Brex transitions operations staff from executing SOPs to building AI prompts
“She's been leaning really aggressively to help every member of the operations organization start rethinking their role as being not people who kind of execute against an SOP, but are people who are going to like build prompts, build evals, and like be, become …”
Reggio: Brex does not pick single AI tool winners internally
“We're not going to try to pick winners in the horse race between the foundational model providers or the agentic coding tools, or like basically anywhere where there's an active horse race. What we do and instead of like trying to pick a single solution is we …”
Reggio: Rapid AI code generation increases incident response risks from knowledge drift
“As well as, like, maybe one of the other facets of being able to generate a lot more code more quickly is, like, the drift between team members as far as, like, understanding of the code that's in their services increases is like everybody's moving faster and …”
Reggio: CS students use AI for design docs rather than raw code generation
“And I was surprised to hear the consensus was that most people there were using agents to collaborate on like building a design document and like,
Collaborating on the architecture of the solution that they want to build, and then they'd be asking it to like e…”
Reggio: Brex relies on Greptile for agentic code review
“We're big fans of creptile and we use them for basically all of sort of the Smarter than linting, ah, like, agentic code review, ah, that's been the one solution that we have aligned around that has served us extremely well.”
Reggio: Brex chose full TypeScript over Kotlin/Elixir for agent codebase
“When we started building this new agent code base, like, as we were saying, like, we were answering the question, what would you do if you built a, you know, a Brex disruptor today? And it's like, it wouldn't be to pick Kotlin and Elixir as the backend. And so…”
Reggio: The real challenge in operational AI is codifying unwritten SOPs into prompts
“The challenge is really articulating and refining prompts to reflect. Reflect the execution of the SOP and like reflect all the sort of institutional knowledge that isn't written down so that agents can properly replace like the humans or the contractors that …”
Reggio: Brex uses Sierra because CX agent administration is not differentiated
“That's like solving problems that are not differentiated enough for us. I think what, what's interesting about the Sierra that has been really helpful is that again, it's really easy for like the UI and UX of basically administering a Sierra agent is something…”
Appearances (1)
| Episode | Date | Speaking time |
|---|---|---|
| Brex’s AI Hail Mary — With CTO James Reggio (acquired for $5B by Capital One!) | Jan 17, 2026 | 57m |