Senior Back End Developer (C# .NET)

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy. We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

About Us: At CI&T, our rapid growth is fueled by the innovative solutions we create for our global clients. We are building a proof of concept for a new loan origination system for a large US mortgage lender, delivered through an agentic SDLC harness. This role builds the back end and shows what agentic delivery looks like in practice. Responsibilities: Build the POC web application back end in C# using our agentic SDLC harness Turn SME requirements and the UX/UI designs into working software Work under the technical leadership of the Software Architect Use agentic tools in day-to-day delivery Requirements: 8+ years of experience in software engineering, at High Senior to Staff level Strong experience with C# Hands-on use of agentic delivery pipelines in the last 1–2 years Experience using agentic SDLC tools day to day Good English Based in Brazil or Colombia; fully remote, joining calls via Microsoft Teams or Google Meet Nice to Have: Front-end experience (full-stack profile) Experience in the mortgage industry Join CI&T and be a part of our mission to show what AI-native software delivery can do. If you have a passion for back-end engineering and working in an agentic way, we want to hear from you!