Lead/Senior Rust Engineer

**Lead Rust Engineer**

Brazil (100% Remote)

• Engineering
• B2B Contract

**About the role**

A US-headquartered software product development company (300+ people across the US, LATAM and Europe) is hiring a Lead Rust Engineer for a long-term engagement with a leading US healthcare SaaS client. You’ll own the technical direction of the service and API layer of a next-generation data platform, building new services in Rust (with some C#) while parts of the current platform still run on Ruby.

**What you’ll do**

• Set technical direction and own architecture and API design for the new service layer.
• Build and maintain backend services and APIs, primarily in Rust.
• Migrate existing C# and Ruby clients to the new API surface with minimal disruption.
• Lead code quality through reviews and work closely with client engineering leads.

**Must have**

• 8+ years of backend experience building production services and APIs, ideally with tech lead experience.
• Commercial Rust experience with async services (Tokio, Axum or Actix).
• Working knowledge of Ruby.
• Strong API design skills (REST/gRPC, versioning, backward compatibility).
• Solid SQL, relational databases, testing, CI/CD and observability.
• Experience driving AI-assisted/agentic coding practices across a team.
• Fluent English.

**Nice to have**

C#/.NET, API migrations or strangler-pattern rewrites, data sync or ETL, and regulated industries.

Strong Lead/Principal Engineers or Architects without direct Rust experience are also encouraged to apply.

**What we offer**

100% remote, long-term B2B contract (40h/week, 9 AM–5 PM BRT core hours), and a flexible policy of up to 40 unpaid days off per year.