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 hiring a Senior .
NET Engineer to join our team and help build complex back-end software solutions. You will work with a multicultural team spread across Brazil, Colombia, the UK, and the USA. All communication will be in English. As a Senior .
NET Engineer, you will design solutions, help guide less experienced developers, and help the team adopt new technologies and best practices. What You Will Do
• Design, build, and maintain back-end services using C#, ADO.
NET, and SQL Server
• Create and improve SOAP and REST APIs (following best practices and version standards)
• Write unit tests and integration tests to make sure services work correctly
• Find and fix problems in the code (root-cause analysis)
• Help integrate different systems and services together (using software design patterns)
• Review other developers’ code and provide guidance to junior team members
• Learn about new technologies and find ways to improve our current solutions
• Work on CI/CD workflows (automated testing and deployment) to improve how the team works What You Need to Know




• Strong experience with .
NET Framework and .
NET Core in real production systems
• Deep knowledge of ADO.
NET and SQL Server
• Experience with database design and making databases work faster
• Hands-on experience building SOAP and REST APIs
• Ability to work with XML (reading and writing XML data)
• Strong understanding of software design patterns and best practices
• Advanced English proficiency
• Ability to work well in multicultural, fast-paced teams Soft Skills
• Takes ownership of your work and always looks for ways to improve
• Communicates clearly with both technical and non-technical people
• Works well with others and values the team’s success
• Can adapt when requirements change or situations are unclear Nice to Have
• Experience with cloud platforms (preferably Azure)
• Knowledge of specification-driven development (building code based on clear requirements)
• Exposure to Agile development methods
• Understanding of modern software development approaches #LI-THAI23 n nOur 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.

📌 [Job - 31975] .NET Developer Senior, Colombia
🏢 Ci&T
📍 Colombia