Microsoft Plans to Replace C and C++ Across Its Software StackPublished Jan 30 2026 | |
| Microsoft is launching an ambitious initiative to rewrite its entire enterprise software stack in Rust by 2030, replacing legacy C and C++ code with the support of automated tools and advanced algorithms. | |
| The shift comes at a time when governments and businesses are demanding more secure technologies that eliminate vulnerabilities caused by manual memory management. | |
| It’s a long term project focused on safety, scalability, and modernizing Microsoft’s codebase for the future. | |
| The rewrite initiative is part of a broader regulatory push encouraging the adoption of memory safe languages like Rust to eliminate long standing vulnerabilities such as buffer overflows, use-after-free (UAF) errors, and out‑of‑bounds reads. These weaknesses have been prime targets for cyberattacks for decades and remain among the leading causes of incidents in critical systems. | |
| Microsoft currently operates a vast and complex ecosystem, with more than 500 online portals and an extensive network of internal infrastructures. Migrating such a landscape requires deep architectural changes. This is not a simple refactoring effort, it is a full scale overhaul affecting core components relied upon by billions of users. | |
| Back in 2022, Microsoft had already designated Rust as the default language for new cloud projects, introducing tools to convert C code and even enabling the development of Windows drivers in Rust. The new objective extends this approach to the entire software estate, a leap in scale that demands highly specialized expertise. | |
| For this reason, the company is hiring dedicated professionals, offering salaries ranging from $139,900 to $274,800 annually (approximately €128,000 to €252,000). These roles fall under the Future of Scalable Software Engineering group, which focuses on reducing technical debt and developing capabilities that can also be offered to enterprise customers. | |
| The total cost of the initiative remains undisclosed, but it includes training thousands of internal developers and managing the risks associated with migrating production systems. The long term sustainability of the project depends heavily on automation’s ability to handle the complexity of existing software without causing delays or budget overruns. | |
| Undertaking a complete rewrite of such a massive software portfolio is a challenge that very few organizations could even consider. | |
| If Microsoft succeeds, its strategy may become a new industry benchmark. If it fails, it will still provide valuable insight into the current limits of automation in large-scale software development. | |








































