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!

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.

📌 Senior .NET Developer, Colombia
🏢 CIu0026T
📍 Colombia