Build Mode

This week on Build Mode, we’re diving back into the archives for a special best-of episode all about effective partnerships, from cofounder relationships and team trust to investor dynamics and leadership communication.

Host Isabelle Johannesen and producer Maggie Nye revisit some of the most insightful conversations from past seasons to explore what makes startup partnerships actually work. Guests share candid stories about finding cofounders online, navigating founder breakups, building trust inside fast-growing teams, balancing marriage and business, choosing the right investors, and learning when compatibility matters more than credentials.

In this episode, you’ll hear from:


Jasper Carmichael-Jack, cofounder & CEO of Artisan


Ian Schmidt, partner & consultant at Trimergence


Hala Jawani and Alessio Trestani, cofounders of Rivio


Leah Solivan, founder of TaskRabbit


Ross Fubini, managing partner at XYZ Venture Capital and Leslie Feinzaig, founder & CEO of Graham & Walker


Sarah Lucena, founder & CEO of Mappa

Whether you’re searching for the right cofounder, managing conflict on your team, scaling as a solo founder, or building relationships with investors, this episode is packed with practical advice and honest founder lessons from people who’ve lived it.

Chapters:

00:00  Intro: 

01:00 Jasper Carmichael-Jack (Artisan): Meeting a cofounder online and navigating a founder breakup

04:20 Ian Schmidt (Trimergence): Frameworks for conflict resolution, communication, and team trust

08:15  Hala Jawani & Alessio Cristante (Riveo): Building a startup as married cofounders

10:20 Leah Solivan (TaskRabbit): Transitioning leadership and building executive trust

12:30 Ross Fubini (XYZ Ventures) & Leslie Feinzaig (Graham & Walker): Choosing the right investors and building your cap table

16:05 Sarah Lucena (Mapa): Compatibility, investor alignment, and finding the right people

 Subscribe to Build Mode on Apple Podcasts, Spotify, or wherever you like to listen. And watch the full videos on YouTube. New episodes of Build Mode drop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams. 

Apply to Startup Battlefield: We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself): techcrunch.com/apply. Be sure to say you heard about Startup Battlefield from the Build Mode podcast.

This week we're sharing our very first episode with Deon Nicholas, the co-founder and CEO of Forethought AI.

In this episode, Nicholas shares how he built a company that puts customers (not hype) at the center. He unpacks his “7-Failure Rule,” the early experiments that shaped Forethought’s success, and why conviction should always come from your users, not your investors.

00:00 Intro
01:23 The Founder Journey: Adapting Every 6-9 Months
05:33 From AI Research to Solving Business Problems
11:12 Finding Your Customer: The Importance of User Conversations
18:22 Building Demos and Landing First Paying Customers
25:12 The Seven Failure Rule for Product Market Fit
30:38 Preparing for and Winning TechCrunch Disrupt
35:16 The Reality of Fundraising and Chasing Metrics
39:07 Navigating Competition in Customer Service AI
43:03 Stepping into Chairman and What's Next
44:57 Outro

Surviving the long road to FDA approval isn’t just about building great technology, it’s about keeping your team motivated, finding the right investors, and learning how to operate when timelines are uncertain.

This week on Build Mode, Isabelle Johannesen sits down with Robbie Bustami, co-founder and CEO of BioticsAI, a Startup Battlefield-winning company building an AI copilot for ultrasound to help detect fetal abnormalities. From a $100K prototype to FDA clearance, Robhy shares what it actually takes to build in one of the most regulated industries in the world.

In this episode, they break down what it really looks like to build a medtech startup, where you can’t “move fast and break things,” and every milestone takes time, coordination, and trust.

This conversation covers:

How to stay motivated and keep your team aligned when FDA approval isn’t guaranteed

What founders need to know about navigating the FDA process from day one How to find investors who understand the slower, high-risk nature of medtech

Why cross-functional collaboration (engineers, clinicians, researchers) is critical to success

The role of advisors and why active industry experts matter more than big names

How to build momentum and celebrate wins during long, uncertain timelines

 Subscribe to Build Mode on Apple Podcasts, Spotify, or wherever you like to listen. And watch the full videos on YouTube.

Apply to Startup Battlefield: We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself): techcrunch.com/apply. Be sure to say you heard about Startup Battlefield from the Build Mode podcast.  

TechCrunch Disrupt: If you're thinking about applying to Startup Battlefield, then October 13 to 15 in San Francisco, we're back for TechCrunch Disrupt, where the Startup Battlefield 200 takes the stage. So if you want to cheer them on, or just network with 1000s of founders, VCs, and tech enthusiasts, then grab your tickets.  

Use code buildmode15 for 15% off any ticket type. 

Chapters:

00:00 Building a $100K MedTech Startup

00:32 Intro: Biotics AI & the Problem with Ultrasound Misdiagnosis

02:16 What Biotics AI Actually Does (AI Copilot for Ultrasound)

02:54 Early Days: Startup Battlefield & First Product

07:10 Navigating FDA Approval (Without Guesswork)

09:22 What FDA Clearance Unlocks (Going to Market)

10:59 Selling into Hospitals & Early Customers

12:11 Keeping a Team Motivated During Long Timelines

18:54 The Hardest Parts of Building in MedTech

22:22 Fundraising, Advisors, and Building the Right Team

28:33 The Future of AI in Reproductive Healthcare

New episodes of Build Mode drop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams.

Surviving the early days as an AI startup isn’t just about making the technology work, it’s about hiring the right people, avoiding costly mistakes, and standing out in a crowded market.

This week on Build Mode, Isabelle Johannessen sits down with Jaspar Carmichael-Jack, founder and CEO of Artisan, a fast-growing AI startup building AI employees for sales. Best known for its viral “Stop Hiring Humans” campaign, Artisan is rethinking outbound sales with AI, while still betting on hiring exceptional human talent.

In this episode, they break down what it really takes to build and scale a venture-backed AI company, from Y Combinator to rapid growth.

This conversation covers:


Startup hiring mistakes every founder should avoid


Lessons on firing, team building, and company culture in early-stage startups


The strategy behind bold, controversial marketing that drives growth


How AI is transforming sales, hiring, and the future of work


What founders get wrong about the necessary roles needed for a scaling startup

This conversation gets to the heart of building a startup: making the right hires early or paying for it later.

 Subscribe to Build Mode on ⁠Apple Podcasts⁠, ⁠Spotify⁠, or ⁠wherever you like to listen⁠. And watch the full videos on ⁠YouTube⁠.

Apply to Startup Battlefield: We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself): techcrunch.com/apply. Be sure to say you heard about Startup Battlefield from the Build Mode podcast.  

TechCrunch Disrupt: If you're thinking about applying to Startup Battlefield, then October 13 to 15 in San Francisco, we're back for TechCrunch Disrupt, where the Startup Battlefield 200 takes the stage. So if you want to cheer them on, or just network with 1000s of founders, VCs, and tech enthusiasts, then grab your tickets.  

Use code buildmode15 for 15% off any ticket type. 

New episodes of Build Mode drop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams.

Deep tech founders face a unique challenge: turning breakthrough science into a scalable startup. From navigating academia and IP to fundraising, manufacturing, and product-market fit, the path from research lab to real-world impact is anything but straightforward.

This week on Build Mode, Isabelle Johannessen sits down with Capella Kerst, founder and CEO of geCKo Materials and 2024 Startups Battlefield runner up.  geCKo Materials is building a bio-inspired adhesive with applications across robotics, manufacturing, and even space. In this episode, they explore how she turned a Stanford PhD breakthrough into a venture-backed deep tech company. 

This conversation covers:


How to turn academic research into a scalable startup


The challenges of moving from Stanford PhD to founder and CEO


What it takes to raise capital as a deep tech and hardware startup


Why commercialization and manufacturing are the hardest parts of innovation


How to identify real-world use cases and achieve product-market fit

Following recent episodes on building teams, this conversation focuses on the foundation behind every startup: transforming breakthrough technology into a viable business.

Apply to Startup Battlefield: We are looking for early-stage companies that have an MVP. So nominate a founder (or yourself): techcrunch.com/apply. Be sure to say you heard about Startup Battlefield from the Build Mode podcast.  

TechCrunch Disrupt: If you're thinking about applying to Startup Battlefield, then October 13 to 15 in San Francisco, we're back for TechCrunch Disrupt, where the Startup Battlefield 200 takes the stage. So if you want to cheer them on, or just network with 1000s of founders, VCs, and tech enthusiasts, then grab your tickets.  

Use code buildmode15 for 15% off any ticket type. 

Chapters:

00:00 The Breakthrough Moment

01:45 From Startup Battlefield to Scale

02:42 What Gecko Materials Actually Does

05:18 Turning a PhD Into a Company

07:44 The Big Vision for Gecko Materials

09:19 From Wild Ideas to Real Use Cases

11:16 Spinning Out of Stanford

14:49 Raising Capital (and a 36-Hour Round)

17:54 Breakthroughs and Momentum

18:00 Building a World-Class Team

22:19 Owning the Founder Role

24:21 Finding Product-Market Fit in Deep Tech

26:54 Why More Research Doesn’t Become Startups

29:15 What’s Next for Gecko Materials

New episodes of Build Mode drop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams.