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.
We are looking for a Senior .NET Engineer to join our team and drive the development and integration of complex back-end software solutions. You will work closely with a multicultural team distributed across Brazil, Colombia, the UK, and the USA, collaborating daily in English and contributing to robust, scalable services and integrations.
Must-Have Skills:
• .NET Experience: strong experience with .NET Framework and .NET Core in production systems.
• Backend Development: hands-on experience building back-end services with C#, ADO.NET, and SQL Server.
• APIs & Integration: solid experience implementing and evolving SOAP and RESTful services, including versioning and best practices.
• Data & Persistence: strong understanding of ADO.NET, SQL Server, database design and performance tuning.
• XML: proficiency in XML serialization/deserialization.
• Software Design: solid grasp of software design patterns and engineering best practices.
• Testing & Reliability: experience with unit and integration testing, troubleshooting and root-cause analysis for service reliability.
• Communication: effective communication skills in multicultural, fast-paced environments.
• Language: advanced English proficiency (all communication in English).
Key Responsibilities
• Design, build and maintain back-end services using C#, ADO.NET and SQL Server.
• Implement and evolve SOAP and REST APIs, ensuring proper versioning, security and best-practice standards
📌 [Job - 31975] Senior .NET Developer, Colombia
🏢 Ci&T
📍 Colombia