[Job - 30605] Senior Developer (.NET), Brazil

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. Join Us as a Senior .NET Engineer! 😃 Are you ready to step into an exciting role where your back-end development skills will shine? We’re seeking a Senior .NET Engineer to become a vital part of our dynamic team, working collaboratively across Brazil, Colombia, the UK, and the USA—all while communicating in English! What You’ll Do: Design & Build : Develop and maintain back-end services using C#, ADO.NET, and SQL Server. API Development : Create and enhance SOAP and REST APIs, ensuring adherence to best practices and versioning standards. Service Reliability : Guarantee the reliability of our services through comprehensive unit and integration testing, troubleshooting, and root-cause analysis. Collaborative Integration : Work on integrating various systems and services while utilizing effective software design patterns. Mentorship & Code Reviews : Conduct code reviews and mentor junior team members, sharing your expertise and insights. Stay Current : Keep up with emerging technologies and industry trends to continuously improve our solutions. CI/CD Contribution : Play an integral role in our CI/CD workflows, enhancing our development efficiency. What We’re Looking For: Experience : Strong experience with .NET Framework and .NET Core in production systems. Database Skills : Solid understanding of ADO.NET and SQL Server, with hands-on experience in database design and performance tuning. API Knowledge : Proficient in developing SOAP and RESTful services, including XML serialization/deserialization. Design Patterns : Strong grasp of software design patterns and best practices. Communication Skills : Effective communicator who thrives in fast-paced, multicultural teams. Language Proficiency : Advanced English proficiency is a must. Soft Skills That Matter: Proactive Mindset : Take ownership of tasks with a focus on continuous improvement. Collaboration : Strong communication skills across both technical and non-technical audiences. Team Spirit : A collaborative team player who values shared success. Adaptability : Ability to navigate ambiguity and shifting requirements with ease. Nice-to-Have Skills: Experience with cloud platforms, preferably Azure. Familiarity with specification-driven development and agentic approaches. Exposure to Agile development methodologies. If you’re a seasoned back-end developer eager to tackle complex challenges in a dynamic environment, we invite you to apply and become a part of our diverse team! #LI-THAI23 Our benefits: -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; - Profit Sharing and Results Participation (PLR); -Life insurance - Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more! More details about our benefits here: https://ciandt.com/br/pt-br/carreiras At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here . This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.