Who Is Padmanabhan Krishnamurthy, the 27-Year-Old Engineer Leading Cisco’s Big Code Rewrite?
Cisco has given one of its biggest technical jobs to a 27-year-old engineer. His name is Padmanabhan Krishnamurthy. He is now leading an effort to rewrite 98% of Cisco’s legacy code within two years. That is a huge task for a company that makes networking hardware and software used by businesses around the world.
The news has drawn attention for two reasons. First, the scale of the rewrite is enormous. Second, the person in charge is very young for such a role. Cisco leaders say that is exactly the point.
What Is Legacy Code and Why Does It Matter?
Legacy code is old software that still runs important systems. It often works well, but it can be hard to update, slow to change, and costly to maintain. Many large companies depend on legacy code for years, sometimes decades.
For Cisco, rewriting most of its legacy code means replacing old foundations with newer, cleaner systems. This can make products faster to improve, easier to secure, and simpler to connect with modern tools such as artificial intelligence. It can also reduce long-term costs, because old code often needs special skills to keep running.
Why Cisco Is Betting on Young Talent
Cisco President Jeetu Patel has spoken about the role of young engineers in driving innovation. His message is simple: young talent should question established norms. They should not accept “this is how we have always done it” as an answer. At the same time, they need to work closely with experienced teams.
This balance matters. A large rewrite cannot succeed if it is only a fresh perspective. It also needs deep knowledge of how Cisco’s products work and how customers use them. Patel’s approach appears to be about mixing new ideas with collaboration, not replacing one with the other.
What Krishnamurthy Brings to the Table
Krishnamurthy is not a typical corporate engineer. He has co-founded a startup and worked on artificial intelligence projects. That background gives him useful experience in building things quickly, testing ideas, and using AI tools in practical ways.
Startup work often means small teams, fast decisions, and close attention to what users need. AI projects add another layer: knowing where automation can help and where human judgment is still required. Both skills fit a large code rewrite, where speed and smart tooling can make a big difference.
The Scale of the Challenge
Rewriting 98% of legacy code in two years is an ambitious goal. Large software systems are deeply connected. Changing one part can affect many others. Teams must test carefully, avoid breaking customer systems, and keep products running while the work happens.
There is also a people side. Engineers must learn new tools, share knowledge, and agree on standards. Strong leadership and clear communication will matter as much as technical skill. Krishnamurthy’s role will be to keep the effort focused and moving forward.
What This Means for Investors
For investors, the story is a signal about how Cisco plans to compete. Modernizing old code can support faster product launches, better security, and stronger AI features. It can also improve profit margins over time if maintenance costs fall.
The risk is execution. Big rewrites can run late or cost more than planned. Watching progress over the next two years will be important. If Cisco delivers, the effort could strengthen its position in a market where software speed and innovation matter more than ever.
The Bigger Picture
Cisco’s decision shows a wider trend. Big tech companies are giving important projects to younger leaders with startup and AI experience. They are also asking teams to challenge old habits. Krishnamurthy’s task is a test of that idea. If it works, it may change how large companies approach their oldest and most stubborn systems.
