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.
- Ensure service reliability through unit and integration tests, troubleshooting, monitoring and root-cause analysis.
- Collaborate on integration between multiple systems and services, applying appropriate software design patterns.
- Conduct code reviews, provide technical feedback and mentor junior engineers.
- Stay current with emerging technologies and industry trends, applying them to improve existing solutions.
- Contribute to CI/CD workflows and best practices to increase development efficiency and deployment quality.
Soft Skills
- Ownership & Continuous Improvement: proactive in taking responsibility for tasks and driving improvements.
- Communication: able to clearly explain complex technical topics to both technical and non-technical audiences.
- Collaboration: team player who values shared success and cross-functional collaboration.
- Adaptability: comfortable navigating ambiguity and shifting requirements in a dynamic environment.
Nice-to-Have Skills
- Cloud: experience with cloud platforms, preferably Microsoft Azure.
- Modern Practices: familiarity with specification-driven development and agentic approaches to software development.
- Agile: exposure to Agile methodologies (Scrum, Kanban, etc.).
The successful candidate will deliver reliable, performant back-end services and integrations, help elevate engineering standards through reviews and mentorship, and collaborate smoothly across time zones and cultures using English as the primary language.
If you are a seasoned back-end developer ready for complex challenges in a dynamic, multicultural environment, we invite you to apply and become part of our diverse team!
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What We Do
CI&T is your end-to-end digital transformation partner. As a digital native, we bring a 27-year track record of accelerating business impact through complete and scalable digital solutions. With a global presence of 6,000+ professionals in strategy, research, data science, design and engineering, we unlock top-line growth, improve customer experience and drive operational efficiency.
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