Hi, I'm Brennan.

I build innovative digital products people love.

I work best with a small crew, digging in with the business to find the one lever that can move a mountain. For me, success isn't just shipping a quality product—it's creating small empowered teams that continue to deliver value every day.

Consulting

Peru Small Birds

Part 1: What is “healthcare” in the US

An introduction to the U.S. healthcare system as "harder than rocket science" because it's a massively expensive and underperforming system plagued by "consolidated fragmentation." Despite enormous spending, outcomes lag behind other developed nations. The core issue is that the major players—insurers, hospitals, and providers—have grown into powerful, competing silos. This creates a gridlock that stifles innovation and prevents them from working together effectively to improve patient health, as each entity focuses on its own financial advantage.

Work

Building technology teams and products that make a difference.

CTO

Firsthand

Led the technology organization across Product, Software, Data, IT, and Security, scaling the team from 3 to 25 while supporting rapid physical expansion across 28 offices. Architected helpinghand, our proprietary AI-powered care management tool, and secured HITRUST r2 certification under strict deadlines.

Founder

Kelp

Founded Kelp to filter our ocean of information down to just what you need right now. Built a Chrome Extension with integrations across major workplace platforms. Now it is an AI assistant focused on helping executives stay current on industry, technology, and cultural shifts.

Try Kelp
Founding Engineer

Cityblock Health

As the 3rd team member, I was instrumental in incubating and launching Cityblock from within Alphabet's Sidewalk Labs. My team built the core data and software technology foundation, including data-sharing partnerships with payers and Commons—the proprietary care management platform.

Lots of projects

More on LinkedIn

Many past projects such as leading Artsy.net's public web presense and auctions, Motivate (Citi Bike), HCI research at MIT CSAIL and working at the MIT Media lab on visualizations for Ars Electronica.

Writing

Essays on engineering leadership, startups, and building teams.

An introduction to building software for value-based care

This post argues that building successful software for value-based care (VBC) requires a shift in mindset: create a Customer Relationship Management (CRM) tool, not just a better Electronic Health Record (EHR). VBC realigns healthcare incentives around long-term patient outcomes, succeeding through proactive, relationship-based care rather than transactional services. Technology's role is to support this relationship by helping care teams orchestrate interventions effectively. The most valuable tools are often simple and pragmatic, focusing on the unique, core needs of the care model and enabling proactive management of patient health.

Learnings from building Kelp: Getting people the information they need when they need it is hard!

Reflections on pausing the contextual recommendation tool, Kelp, concluding that its goal—getting people the right information at the right time—is nearly impossible for a third-party app to achieve. The core problem is technical: without deep, OS-level access to user data and behavioral signals, recommendations remain mediocre. True contextual help must be built into the operating system itself. The key business takeaway was the need to solve a highly specific, paying use case for a narrow audience before attempting a broad, cross-platform solution.

Learning from a Hyper-Growth Startup

This reflection on leadership in a hyper-growth startup argues that self-management is the most crucial skill. Management in such a chaotic environment is inherently reactive and emotionally draining, not strategic and proactive. The key to effectiveness is to abandon "ruinous empathy"—the futile attempt to please everyone—and instead fiercely conserve personal energy for high-impact moments. This is achieved by accepting failure and tradeoffs as constant, communicating them transparently, and focusing on maximizing success in key areas rather than fighting every fire.

Is Buying in Brooklyn Worth It?

Brooklyn homeownership is not "worth it" as a financial investment. After accounting for renovation costs, high transaction fees, and the opportunity cost of not investing in the stock market, my profitable-on-paper sale was actually a financial loss. The true costs were the non-financial headaches: months of living in construction dust, battling city bureaucracy over permits, and fixing bank errors over property liens. I conclude that you buy a home not for the return, but for the control and satisfaction of making a space your own.

How to Build Trust and Foster High-Impact Teams

This post argues that as startups grow, the initial high-trust environment often collapses into chaos. The common leadership mistake is to push for more speed; the real solution is to slow down and rebuild trust through predictability. The author outlines a four-stage journey where a team matures by making and keeping progressively more abstract promises: evolving from committing to specific tasks (via ticketing systems), to achieving monthly goals, and ultimately, to delivering business impact measured by KPIs. This entire process is driven by retrospectives, which help a team understand its current level of trust and take the next step.

What Does Working at a Successful Startup Look Like Financially?

An engineer at a successful startup sold $x million in shares to diversify my wealth, only to discover afterward that they were just two months shy of qualifying for the QSBS tax exemption. This "hidden rule" would have eliminated their entire federal tax bill. The post serves as a cautionary tale about the immense financial cost of navigating the complex and often obscure tax laws surrounding startup equity without specialized knowledge.

Guide to Engineering Ladder Communication

Creating a successful engineering ladder isn't about perfect documentation—it's about building trust and psychological safety. The best ladders are actively used by teams and trusted across the organization because they're built on a foundation of "trust but verify" principles and open communication. Treat your ladder like a business relationship with SLAs, acknowledge potential failure modes, and remember that its success hinges on whether both engineers and management share a common understanding of its terms.

Learning from Artsy: How to hire awesome engineers

Finding smart, motivated people who work well together is virtually impossible. If Artsy has a secret sauce, it is how it hires. All else falls from the assumption that they have hired the best people who want to work together to achieve Artsy’s mission.

Debugging a live Saturn V

We all have stories, as engineers, of fixing some crazy thing at the last minute right before the demo goes up. We have all encountered situations where we needed to fix something that was our fault and we needed to fix it now.

Why Value-Based Care is Harder Than Rocket Science

This series argues that U.S. healthcare is "harder than rocket science" due to its "consolidated fragmentation," where powerful, siloed players hinder effective, affordable patient care. The main conclusion is that in an era of AI and consolidation, we need a major shift in data policy to deliver on the promise of improved quality of care at reduced cost.

Part 1: What is “healthcare” in the US

An introduction to the U.S. healthcare system as "harder than rocket science" because it's a massively expensive and underperforming system plagued by "consolidated fragmentation." Despite enormous spending, outcomes lag behind other developed nations. The core issue is that the major players—insurers, hospitals, and providers—have grown into powerful, competing silos. This creates a gridlock that stifles innovation and prevents them from working together effectively to improve patient health, as each entity focuses on its own financial advantage.

Part 2: What is Value-Based Care?

This post details the value-based care is a model that pays providers to keep patients healthy and contrasts it with the traditional fee-for-service system. I argue that while the goal is simple, implementing it is "harder than rocket science." Drawing from my experience, the post details the extreme difficulties involved, including navigating multi-year contract negotiations with insurers, building a massive and complex operational system before seeing a single patient, and the immense challenge of aligning internal teams who often have conflicting goals. I argue that this operational gridlock makes it nearly impossible to create a scalable, efficient, and truly patient-centered system.

Part 3: Why Your Health Data is a Mess

Your official health record is a useless mess, fragmented across different doctors and insurers. I argue that advertisers at companies like Google and Amazon know more about your daily life and habits than your own physician. Because this foundational data is so broken, new healthcare models like value-based care are failing, and simply applying AI won't fix the problem until the data itself is fixed.

Part 4: From 1 Year to 1 Month: A Proposal for Better VBC Contracts

Value-based care contracts are challenging due to lengthy negotiations, strict and evolving security demands (especially post-Change Healthcare), and rigid terms that hinder innovation. These issues create financial strain for startups, making value-based care primarily accessible to large, established healthcare entities. In a world rapidly changing due to AI and at the policy level, we should set a target of contracts taking 1 month rather than 1 year. My recommendation is for contract standardization and data sharing processes that are either centralized or fully open-sourced.

Photography

Capturing moments from travels and everyday life.

Peru Small Birds

Oct 25, 2025

Peru Small Birds

Peru Larger Birds

Oct 24, 2025

Peru Larger Birds

Flowers

Jul 14, 2025

Flowers

Water Birds

Dec 25, 2024

Water Birds

US Open, 2024

Aug 14, 2024

US Open, 2024

Hummingbirds

Feb 24, 2024

Hummingbirds

Banzai Pipeline

Feb 20, 2024

Banzai Pipeline

Cali, Colombia

Jul 24, 2023

Cali, Colombia

Puebla & Oaxaca

Mar 28, 2022

Puebla & Oaxaca

Fall Textures

Oct 5, 2021

Fall Textures

Fall Foliage

Oct 4, 2021

Fall Foliage

Banff

Sep 30, 2021

Banff

Beach

Nov 18, 2020

Beach

Reflection

Jul 18, 2020

Reflection

Weird Covid

Jun 18, 2020

Weird Covid

Out West

Oct 25, 2019

Out West

Fog

Aug 15, 2019

Fog

Publications

Peer-reviewed work on personal informatics and automation.

  • Assisted Self Reflection: Combining Lifetracking, Sensemaking, & Personal Information Management

    Brennan Moore, Max Van Kleek, David R. Karger, mc schraefel

    In this paper, we present an ongoing project designed to make self-reflection an integral part of daily personal information management activity, and to provide facilities for fostering greater self-understanding through exploration of captured personal activity logs.

  • Atomate it! end-user context-sensitive automation using heterogeneous information sources on the web

    Max Van Kleek, Brennan Moore, David R Karger, Paul André, M C Schraefe

    Our system, Atomate, treats RSS/ATOM feeds from social networking and life-tracking sites as sensor streams, integrating information from such feeds into a simple unified RDF world model representing people, places and things and their timevarying states and activities. Combined with other information sources on the web, including the user's online calendar, web-based e-mail client, news feeds and messaging services, Atomate can be made to automatically carry out a variety of simple tasks for the user, ranging from context-aware filtering and messaging, to sharing and social coordination actions.