Build Mode

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.

This week’s guest is Ayal Yogev, co-founder and CEO of Anjuna Security, who has experienced both sides of the startup journey: scaling quickly during the boom years and then making the incredibly difficult decision to lay off a significant portion of his team when the market shifted.

From growing to 75 employees to scaling back and rebuilding, Yogev learned firsthand that the hardest part of leadership isn’t hiring fast, it’s making tough decisions with care, transparency, and integrity.

In this episode, Isabelle Johannessen and Yogev unpack what it really means to lead through layoffs with compassion and how founders can support their teams even in the most challenging moments. They also explore the lessons learned from scaling too quickly and how to build a more resilient company the second time around.

They discuss:


How to approach layoffs with empathy and transparency


Ways to support employees beyond financial compensation


What founders get wrong about scaling and hiring


Why culture matters most during difficult moments


Lessons from rebuilding after layoffs

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. 

 Chapters:

00:00 We grew too fast

02:30 What Anjuna actually does

04:45 Scaling the team quickly

06:10 The market crash hits

09:40 Handling layoffs with empathy

12:10 Supporting employees the right way

15:30 Why culture matters in crisis

20:50 The hiring mistake founders make

27:40 When to scale your sales team

34:40 Rebuilding after layoffs

If one thing has become clear this season, finding the right talent for your team isn’t as easy as picking from a pile of resumes This week’s guest is  Leah Solivan, the founder of Taskrabbit and now an early-stage investor who has seen that the power to change a homogenous startup exosystem comes from empowering diverse VCs to fund underrepresented founders who will hire the hidden tech talent.

From bootstrapping TaskRabbit on credit cards to scaling it into one of the defining companies of the gig economy, Leah learned firsthand that the hardest part of building a company isn’t the product, it’s selecting the right people to build it.

In this episode, Isabelle Johannessen and Leah unpack what it really takes to build diverse teams from day one and why most companies get it wrong by waiting too long. They also explore how the lack of diversity in venture capital directly shapes who gets funded, and ultimately, who gets hired.

They discuss:


How to build diverse teams intentionally from the very beginning


Why the “easy path” in hiring leads to less diverse outcomes


The connection between diverse VCs and diverse companies


How to hire for culture and values over credentials

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 hard way to hire diverse talent

01:20 From engineer to Taskrabbit founder03:39 The moment that sparked Taskrabbit

07:39 Why building teams is the hardest part

12:06 Learning how to hire from scratch

17:36 Why venture capital lacks diversity

27:25 How to build diverse teams from day one

39:42 What founders get wrong about competition

If one thing has become clear this season, it’s that there is no formula to building the perfect team. But no one breaks the mold quite like this week’s guest, Isaiah Granet, the co-founder and CEO of Bland. The voice AI startup has been growing at a breakneck speed but the founding team has taken their time to prioritize passion over pedigree and find their team members in places many might not think to look. 

In this episode, Isabelle Johannessen and Isaiah Granet unpack a radically different approach to hiring that prioritizes aligned work ethic, curiosity, and flexibility rather than resumes and connections. So far, that approach has worked for Bland. The scrappy team has gone from pre-seed to series B in less than a year. 

They discuss:


How to identify “hidden gem” talent in unexpected places


The role of cold inbound and unconventional sourcing


When to hire ahead of need and when not to


How hiring philosophy shapes company culture at scale

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 — Hiring for Passion Over Pedigree
02:42 — Pivoting Into Voice AI
03:49 — Explosive Growth: Pre-Seed to Series B
05:00 — Surviving Hypergrowth
10:00 — Rethinking Hiring: Finding Hidden Talent
16:30 — Building and Scaling Culture
24:00 — Who to Hire (and When to Fire)
41:30 — Compensation, Equity, and Final Lessons

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.

Every founding team is a mix of personalities, communication styles, and strengths. That can be a superpower or cause founders to butt heads. Without a clear framework for navigating conflict, even the strongest teams can fall apart before they really get started.

This week on Build Mode, Isabelle Johannessen sits down with Ian Schmidt, strategic advisor at Trimergence, to unpack the “personal operating system” behind every founder. As a coach, consultant, and occasionally a bouncer, Ian helps teams build the self-awareness and relational tools they need to scale without unnecessary friction.

They discuss:


Why founders should invest in coaching before conflict escalates


How to repair after conflict goes sideways


The importance of understanding your own triggers as a leader


How to create space for the self-work that actually saves time long-term

Following last week’s episode on family co-founders, this conversation expands those lessons into practical tools any founding team can use.

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 Why Conflict Isn’t the Problem

02:18 The Founder Operating System

04:21 Why Co-Founders Clash

05:34 How to Map Your Personal OS

10:26 Start Early or Pay Later

16:59 Frameworks for Navigating Conflict

23:32 Relationships, Loneliness & Support Systems

31:15 Identity, Habits & Scaling Yourself

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.