Sonnet Code
Language · Language

Work with senior C# engineers.

C# engineers who ship production systems, not pitch decks.

We build production C# systems for US product teams every week. Senior engineers, aligned with your timezone, embedded in your process. We write C# the way your team will still want to read it next year.

Let's talk

Jump-start your C#

Tell us a bit about what you're building. We reply within one business day.

By submitting this form you agree to our privacy policy. No spam, no sharing.
C# in production
Why Sonnet Code for C#

The bar we hold ourselves to.

Senior only

Every engineer we put on your work has 5+ years shipping production code. No rotations out, no bait-and-switch.

Measured, not promised

Performance budgets, observability, and evaluation metrics are part of the build — not things we add after you ask.

Honest scoping

We'll tell you when this is the wrong tool for the job. The fastest way to lose a client is to ship the wrong thing.

What we build with C#

C# work, shipped.

New C# systems

Greenfield C# services architected for the three-year horizon — proper boundaries, tests, and documentation from day one.

C# modernization

Incremental migration from legacy systems, using the strangler-fig pattern so you never bet the farm on a single cutover.

C# scaling

Taking an existing C# codebase from working-for-10k-users to working-for-10M-users, without a full rewrite.

C# team augmentation

Senior C# engineers embedded in your team, shipping alongside your engineers with the same standards and PR process.

Ready to get started with C#? Fifteen minutes is all it takes.