Python founder Guido van Rossum joins Microsoft
He joins the firm’s Developer Division as Python breaks into the top two most popular languages for the first time


Renowned programmer and founder of the Python programming language, Guido van Rossum, has come out of retirement to join Microsoft’s development team.
More than a year after announcing his retirement, van Rossum has decided to take up a role with the company’s ‘Development Division’, with a view to making Python generally better to use, and not just for Windows 10.
The Python creator left Dropbox in October 2019, having worked at the company for almost seven years, making contributions to Python at Dropbox but also exerting major influence over the company's engineering culture, and staff. Prior to this, van Rossum developed software for Google.
Few details have been disclosed about the nature of van Rossum’s role, although it’s expected his presence will continue to influence Microsoft’s deepening integration with Python. Van Rossum also hinted at “lots of open source” when it comes to his duties.
His latest move coincides with the Python language flying past Java to break into the top-two most popular programming languages for the first time, according to the TIOBE index.
Python ranked second in the latest monthly rankings for the first time in the index’s 20-year history, with C still the most popular language. C and Java have traditionally been the most prevalent languages among developers up to this point.
The TIOBE index is updated once a month, and ratings are based on the number of skilled engineers worldwide, courses and third-party vendors. Popular search engines are used to calculate the ratings. C scored 16.2%, followed by Python on 12.1% and Java on 11.7%.
Sign up today and you will receive a free copy of our Future Focus 2025 report - the leading guidance on AI, cybersecurity and other IT challenges as per 700+ senior executives
Supplementary research has reinforced this point, with Stack Overflow reporting separately last year that Python and Typescript were the joint-second most popular languages among developers. In this study, Javascript was found to be the most popular language.
Python’s relative simplicity against other languages makes it a highly accessible language for developers, including people who want to get to grips with the fundamentals of coding.
Photo by Daniel Stroud / CC 4.0 International

Keumars Afifi-Sabet is a writer and editor that specialises in public sector, cyber security, and cloud computing. He first joined ITPro as a staff writer in April 2018 and eventually became its Features Editor. Although a regular contributor to other tech sites in the past, these days you will find Keumars on LiveScience, where he runs its Technology section.
-
Using DeepSeek at work is like ‘printing out and handing over your confidential information’
News Thinking of using DeepSeek at work? Think again. Cybersecurity experts have warned you're putting your enterprise at huge risk.
-
Can cyber group takedowns last?
ITPro Podcast Threat groups can recover from website takeovers or rebrand for new activity – but each successful sting provides researchers with valuable data
-
Developers say AI can code better than most humans – but there's a catch
News A new survey suggests AI coding tools are catching up on human capabilities
-
84% of software developers are now using AI, but nearly half 'don't trust' the technology over accuracy concerns
News AI coding tools are delivering benefits for developers, but they’re still worried about security and compliance
-
Think AI coding tools are speeding up work? Think again – they’re actually slowing developers down
News AI coding tools may be hindering the work of experienced software developers, according to new research
-
OpenAI's plan to acquire AI coding startup Windsurf ended in disaster – here’s how the deal fell apart
News The acquisition by Cognition comes after a rumored $3bn offer from OpenAI fell through
-
AI coding tools are booming – and developers in this one country are by far the most frequent users
News AI coding tools are soaring in popularity worldwide, but developers in one particular country are among the most frequent users.
-
MCP servers used by developers and 'vibe coders' are riddled with vulnerabilities – here’s what you need to know
News Security researchers have issued a warning over rampant vulnerabilities found in MCP servers used by developers and 'vibe coders'.
-
Big tech promised developers productivity gains with AI tools – now they’re being rendered obsolete
Opinion Big tech promised software developers huge benefits with AI tools, but now they face job cuts as companies ramp up automation.
-
Anthropic’s new AI model could be a game changer for developers: Claude Opus 4 ‘pushes the boundaries in coding’, dramatically outperforms OpenAI’s GPT-4.1, and can code independently for seven hours
News Claude Opus 4 boasts huge performance capabilities and is fine-tuned for software developers.