Rust development and C/C++ migration, one module at a time
We have been writing Rust since long before it was fashionable. We use it where it earns its place: services where latency and infrastructure cost matter, security-sensitive code, and legacy C and C++ that needs to become safe without stopping the business. Everywhere else, we’ll tell you a more mainstream language is the better call.
Why we reach for it
Engineering reasons, not fashion - the same test every tool in our stack has to pass.
Memory safety without a garbage collector
The compiler rules out use-after-free, buffer overflows and data races before the code ships - the bug classes behind most security fixes in large C and C++ codebases.
C-level performance, predictable latency
No runtime pauses and no hidden allocations. Rust services typically need a fraction of the CPU and memory of the systems they replace, which shows up directly on the cloud bill.
Ten years stable, and mainstream now
Rust 1.0 shipped in 2015. Microsoft, Cloudflare, Meta and GitHub run it in production at scale - it passes the same track-record test as every other tool in our stack.
Refactoring you can trust
A strict type system and a compiler that explains its errors mean large changes land without regressions - the property that makes long-lived systems cheaper to own.
When we advise against it
A tool we recommend for everything is a tool we’ve stopped thinking about. Three cases where the answer is something else.
A typical CRUD product or portal
Forms, dashboards and business workflows rarely hit the limits Rust removes. TypeScript or .NET ship them faster and your future hires already know them - see Next.js and .NET.
A stable system nobody needs to change
Rewriting working C++ for its own sake rarely pays back. If the code is stable, secure enough and cheap to run, leave it - and put new modules in Rust only when there is a reason to touch that area.
A big-bang rewrite
Replacing everything at once is how migrations die. We move one module at a time behind a stable interface - the same approach as our legacy modernisation work.
What we build with it
The shapes Rust work most often arrives in - each one tied to a service we know well.
High-throughput backend services →
APIs, event processors and data pipelines where latency and cost per request matter - built in Rust, integrated with the rest of your stack.
Incremental C/C++ migration →
Hot paths and security-sensitive modules rewritten in Rust behind FFI boundaries, with the existing tests proving behaviour stays identical.
Real-time engines →
Pricing, matching and settlement engines where every millisecond and every correct decimal counts.
AI infrastructure →
Inference gateways, document processing and the glue around self-hosted models - fast, memory-predictable and safe under load.
CLIs and developer tooling →
Single-binary tools for your engineers and operations team - fast to start, easy to distribute, no runtime to install.
Should you migrate to Rust? →
Our founder's take after seven years of Rust - what the big migrations teach and how to decide for your own system.
How a migration runs
It starts with a diagnosis: we map which modules cause the crashes, security fixes and cloud cost, and rank them by payback. Then each module moves behind a stable interface, with the existing tests - and new ones - proving behaviour is unchanged before traffic switches over. AI-assisted translation speeds up the mechanical part; engineers own the interfaces, the unsafe boundaries and the review. Billing follows accepted milestones, as with every project.
Common questions
Should we rewrite our C++ codebase in Rust?
Usually not all at once. Start with the modules that cause the most security fixes, crashes or infrastructure cost, rewrite those behind a stable interface, and let the results decide how far to go.
How long does a Rust migration take?
A single module or service typically takes weeks, not years. AI-assisted translation has made the mechanical part much faster; the time goes into tests, interfaces and verifying behaviour is unchanged.
Can Rust work alongside our existing code?
Yes. Rust calls and is called from C and C++ through FFI, and runs as a separate service next to anything else. Most of our Rust work lives inside systems that are mostly other languages.
Is it hard to hire Rust developers later?
The pool is smaller than for TypeScript or Java but growing fast, and Rust has topped developer surveys as the most admired language for years. We document everything we hand over so your team can own it.
Wondering whether Rust is worth it for your system?
The diagnosis is free: we look at the code, rank the candidates and tell you honestly if the answer is to leave it alone.