Senior .NET Developer

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. Responsibilities:• Design and build RESTful APIs and services in .NET that integrate a new partner-facing portal with internal loan systems. • Implement business logic per documented API contracts and business rules. • Build and consume asynchronous, event-driven integrations (message/queue-based notifications). • Write automated tests and participate in code review. • Deploy and operate services in containers on Azure, using GitLab CI pipelines. • Troubleshoot and resolve defects across Development, QA, UAT, and Production environments. • Collaborate with the Business Analyst and Software Architect to clarify requirements and edge cases. Requirements:• 6+ years of professional software development experience with .NET (C#), including independent ownership of complex features end-to-end. • Experience building and consuming REST APIs. • Practical experience with Microsoft Azure services (App Services, Functions, Service Bus, or equivalent). • Experience with containerized deployments (Docker). • Experience with Git and CI/CD pipelines (GitLab CI or equivalent). • Familiarity with automated testing frameworks (unit and integration tests). • Good English communication skills (B2+) — daily collaboration with a US-based team. Nice to Have:• Experience with OAuth 2.0 / bearer-token security patterns. • Experience with event-driven or asynchronous architectures (Service Bus, pub/sub). • Experience in mortgage, lending, or financial services. • Experience integrating with legacy or mainframe systems via APIs. Our benefits include: - Premium Healthcare - Meal voucher - Maternity and Parental leaves - Mobile services subsidy - Sick pay-Life insurance - CI&T University - Colombian Holidays - Paid Vacations And many others. Collaboration is our superpower, diversity unites us, and excellence is our standard. We value diverse identities and life experiences, fostering a diverse, inclusive, and safe work environment. We encourage applications from diverse and underrepresented groups to our job positions.