Building a magical AI code editor used by over 1 million developers in four months: The untold story of Windsurf | Varun Mohan (co-founder and CEO) · Lenny's Podcast: Product | Career | Growth summary

Key takeaways

Windsurf’s evolution showcases the importance of adaptability in tech startups, especially in the rapidly changing AI landscape.
Regular innovations and updates are critical for remaining competitive and relevant in the tech industry.
AI is set to significantly change software development, allowing engineers to focus on problem-solving rather than just coding.
Investing in a strong sales team early can support enterprise growth in ways traditional startup strategies may overlook.
Fostering a culture of agency and urgency in hiring practices can lead to better prioritization and productivity within teams.
Product teams benefit from having tech-savvy strategists who can bridge the gap between user needs and technical feasibility, improving product development outcomes.

Summary

The Genesis of Windsurf

Varun Mohan shares the origins of Windsurf, which started as Codium—a GPU virtualization and compiler software company. Initially focused on deep learning for various industries, the company pivoted to an AI coding tool as the landscape changed with the emergence of generative AI. After experimenting with different models, Codium transitioned to build Windsurf after recognizing the potential for a new generation of tools designed to assist developers with coding more efficiently.

Innovative Approach to Product Development

The discussion covers Windsurf's commitment to regularly improving its product every six to twelve months, emphasizing the need to innovate and adapt to stay ahead of the competition. Varun illustrates this with a metaphor comparing the company to a 'dehydrated entity,' suggesting that new hires should only happen when the team feels stretched thin, thus ensuring focused productivity.

AI's Transformative Role in Coding

Varun predicts that AI will take on a significant role in software development, with estimates suggesting that 90% of code will become AI-generated. Despite this shift, he asserts that engineer roles will grow as the complexity of software development remains and that engineers will need to focus more on the problem-solving aspects rather than just writing code.

Strength in Sales and Go-to-Market Strategy

The podcast details Windsurf's early investment in an 80-person sales team, a move against typical startup wisdom. Varun attributes this decision to a clear understanding that effective enterprise sales are crucial for long-term success and explains how the company has been able to leverage its technology to gain traction with large corporations.

The Changing Role of Engineers in the AI Era

Engineers are expected to evolve, shifting from traditional coding tasks to roles focused on oversight, direction, and problem-solving. With the assistance of platforms like Windsurf, engineers can spend less time coding and more time ensuring that solutions align with business goals, effectively enabling them to prioritize higher-level tasks.

Hiring and Company Culture Innovated

Varun discusses Windsurf's unique hiring philosophy, emphasizing a lean company model where new hires are only added when absolutely necessary. He mentions the importance of high agency among employees and how team engagement is maximized through shared problem ownership, fostering a culture that values prioritization and urgency.

Product Management Approach

Instead of traditional product managers, Windsurf employs product strategists with a solid engineering background. This strategy enables the team to create more effective, user-centered products by fostering better communication between technical and non-technical staff.

The Future of Tools and Applications

The episode concludes with insights into how products like Windsurf can empower non-developers to create custom applications, fundamentally altering traditional workflows. Varun stresses the importance of empowering all employees to engage with software development, seeing it as a way to increase productivity and creativity in the workplace.

Show notes

Varun Mohan is the co-founder and CEO of Windsurf (formerly Codeium), an AI-powered development environment (IDE) that has been used by over 1 million developers in just four months and has quickly emerged as a leader in transforming how developers build software. Prior to finding success with Windsurf, the company pivoted twice—first from GPU virtualization infrastructure to an IDE plugin, and then to their own standalone IDE.

In this conversation, you'll learn:

1. Why Windsurf walked away from a profitable GPU infrastructure business and bet the company on helping engineers code

2. The surprising UI discovery that tripled adoption rates overnight.

3. The secret behind Windsurf's B2B enterprise plan, and why they invested early in an 80-person sales team despite conventional startup wisdom.

4. How non-technical staff at Windsurf built their own custom tools instead of purchasing SaaS products, saving them over $500k in software costs

5. Why Varun believes 90% of code will be AI-generated, but engineering jobs will actually increase

6. How training on millions of incomplete code samples gives Windsurf an edge, and creates a moat long-term

7. Why agency is the most undervalued and important skill in the AI era

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Brought to you by:

• Brex—The banking solution for startups

• Productboard—Make products that matter

• Coda—The all-in-one collaborative workspace

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Where to find Varun Mohan:

• X: https://x.com/_mohansolo

• LinkedIn: https://www.linkedin.com/in/varunkmohan/

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Where to find Lenny:

• Newsletter: https://www.lennysnewsletter.com

• X: https://twitter.com/lennysan

• LinkedIn: https://www.linkedin.com/in/lennyrachitsky/

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In this episode, we cover:

(00:00) Varun’s background

(03:57) Building and scaling Windsurf

(12:58) Windsurf: The new purpose-built IDE to harness magic

(17:11) The future of engineering and AI

(21:30) Skills worth investing in

(23:07) Hiring philosophy and company culture

(35:22) Sales strategy and market position

(39:37) JetBrains vs. VS Code: extensibility and enterprise adoption

(41:20) Live demo: building an Airbnb for dogs with Windsurf

(42:46) Tips for using Windsurf effectively

(46:38) AI’s role in code modification and review

(48:56) Empowering non-developers to build custom software

(54:03) Training Windsurf

(01:00:43) Windsurf’s unique team structure and product strategy

(01:06:40) The importance of continuous innovation

(01:08:57) Final thoughts and advice for aspiring developers

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Referenced:

• Windsurf: https://windsurf.com/

• VS Code: https://code.visualstudio.com/

• JetBrains: https://www.jetbrains.com/

• Eclipse: https://eclipseide.org/

• Visual Studio: https://visualstudio.microsoft.com/

• Vim: https://www.vim.org/

• Emacs: https://www.gnu.org/software/emacs/

• Lessons from a two-time unicorn builder, 50-time startup advisor, and 20-time company board member | Uri Levine (co-founder of Waze): https://www.lennysnewsletter.com/p/lessons-from-uri-levine

• IntelliJ: https://www.jetbrains.com/idea/

• Julia: https://julialang.org/

• Parallel computing: https://en.wikipedia.org/wiki/Parallel_computing

• Douglas Chen on LinkedIn: https://www.linkedin.com/in/douglaspchen/

• Carlos Delatorre on LinkedIn: https://www.linkedin.com/in/cadelatorre/

• MongoDB: https://www.mongodb.com/

• Cursor: https://www.cursor.com/

• GitHub Copilot: https://github.com/features/copilot

• Llama: https://www.llama.com/

• Mistral: https://mistral.ai/

• Building Lovable: $10M ARR in 60 days with 15 people | Anton Osika (CEO and co-founder): https://www.lennysnewsletter.com/p/building-lovable-anton-osika

• Inside Bolt: From near-death to ~$40m ARR in 5 months—one of the fastest-growing products in history | Eric Simons (founder & CEO of StackBlitz): https://www.lennysnewsletter.com/p/inside-bolt-eric-simons

• Behind the product: Replit | Amjad Masad (co-founder and CEO): https://www.lennysnewsletter.com/p/behind-the-product-replit-amjad-masad

• React: https://react.dev/

• Sonnet: https://www.anthropic.com/claude/sonnet

• OpenAI: https://openai.com/

• FedRamp: https://www.fedramp.gov/

• Dario Amodei on LinkedIn: https://www.linkedin.com/in/dario-amodei-3934934/

• Amdahl’s law: https://en.wikipedia.org/wiki/Amdahl%27s_law

• How to win in the AI era: Ship a feature every week, embrace technical debt, ruthlessly cut scope, and create magic your competitors can't copy | Gaurav Misra (CEO and co-founder of Captions): https://www.lennysnewsletter.com/p/how-to-win-in-the-ai-era-gaurav-misra

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Recommended book:

• Fall in Love with the Problem, Not the Solution: A Handbook for Entrepreneurs: https://www.amazon.com/Fall-Love-Problem-Solution-Entrepreneurs/dp/1637741987

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Production and marketing by https://penname.co/. For inquiries about sponsoring the podcast, email podcast@lennyrachitsky.com.

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Lenny may be an investor in the companies discussed.

This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit www.lennysnewsletter.com/subscribe

Building a magical AI code editor used by over 1 million developers in four months: The untold story of Windsurf | Varun Mohan (co-founder and CEO)