We're hiring!We are looking for aSenior .NET Developerbased inBrazilto join a product engineering team building the core of a modern, scalable SaaS platform.This is a hands-on senior role for someone who enjoys solving complex backend challenges, designing clean architectures, and building systems that support multiple products and teams. You'll work on a platform with strong focus onmicroservices, multi-tenant architecture, cloud infrastructure, observability, and secure backend development .We're looking for someone who is highly autonomous, communicates well in English, and is excited about usingAI-assisted development toolsas part of a modern engineering workflow.Responsibilities Design, build, and maintain backend services usingC#and modern.NET Develop and evolveREST APIsandmicroservices Contribute to the architecture of amulti-tenant SaaS platform Help shape domain models, technical patterns, and scalable backend foundations Work on systems related toauthentication, authorization, observability, and CI/CD Build solutions designed forhigh throughput, async workloads, and performance Collaborate with engineering and product teams to extend platform capabilities Participate in technical discussions, architecture decisions, and implementation planning Write clean, maintainable, and well-documented code UseAI-assisted development toolsto improve speed, quality, and deliveryRequirements Strong written and spoken English CNPJ in Brazil + ability to issue monthly Nota Fiscal 5-8 yearsof professional experience withC#and the.NET ecosystem Proven experience building and maintainingRESTful APIsandmicroservices Strong knowledge ofEntity Framework Core ,LINQ, and relational database design Solid understanding ofdependency injection ,async/await, and backend performance optimization Hands-on experience withDomain-Driven Design (DDD)in real production systems Strong understanding ofCQRS, mediator patterns (such asMediatR ), and event-driven architecture Experience designing modular, maintainable systems for complex business domains Experience building systems that handlehigh-volume requests, async processing, and scalable workloads Good understanding of large-file or document processing patterns such asstreaming, buffering, and memory-efficient pipelines Experience with message brokers such asAzure Service Bus ,RabbitMQ, or similar Hands-on experience withMicrosoft Azure Strong working knowledge ofDockerandKubernetes Experience withCI/CD pipelinesusingAzure DevOpsand/orGitHub Actions Experience withmulti-tenant SaaSor enterprise-grade backend platforms Understanding ofJWT / OAuth2, secure backend design, and secrets management Experience with observability tools such asGrafana ,Loki, or equivalent Active use ofAI-assisted development toolssuch asGitHub Copilot ,Claude Code, or similarNice to Have Experience withTemporalor workflow orchestration tools Experience withOpenAI ,Azure OpenAI ,Anthropic, or LLM integrations Experience with document-heavy, enterprise, or compliance-sensitive systems Experience with distributed systems and event-driven platforms at scaleWhat We're Looking For Strong ownership and accountability Clear communication and ability to work directly with technical stakeholders Comfort working independently in a remote environment Someone who cares aboutsoftware quality, reliability, and maintainability A senior engineer who can combinehands-on executionwitharchitectural thinking Genuine interest in how AI is changing software development workflows