Join a US tax-tech company rebuilding its core platform with modern .NET on AWS. You'll own backend services, business rules and asynchronous workflows, and keep financial data consistent end to end.

What you'll do

• Design and build distributed services (SQS, Redis, CQRS, PostgreSQL)

• Turn ambiguous tax and business rules into technical solutions, evaluating trade-offs

• Support production during tax season

• Ship with AI coding agents while validating every output

Must have

• 8+ years in software, 4+ recent with modern C#/.NET (async/await, DI, background workers)

• EF Core and Dapper

• Messaging, idempotency and retries on AWS

• Hands-on with Claude Code or similar AI coding agents

• C1 English

Full-time · contractor · 100% remote from LATAM · USD 3,500–4,000/month.