We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions.With over 7,400 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality. We are seeking a highly skilled and motivated Mid or Senior C#/.NET & ReactJS Developer to join our dynamic team. You will play a key role in designing, developing, and maintaining an internal sales product, working on both the backend (C#/.NET) and frontend (ReactJS) components. You will collaborate closely with other developers, product owners, and stakeholders to deliver high-quality, scalable, and maintainable solutions. Responsibilities: - Design, develop, and maintain robust and scalable backend services using C#/.NET.- Develop responsive and engaging user interfaces using ReactJS.- Write clean, well-documented, and testable code.- Participate in code reviews and provide constructive feedback.- Collaborate with other developers, product owners, and stakeholders to deliver high-quality solutions.- Troubleshoot and debug complex issues.- Contribute to the continuous improvement of our development processes and tools.- Stay up-to-date with the latest technologies and trends. Qualifications: - 5+ years of professional software development experience.- Expertise in C#/.NET development, including .NET Core/ .NET Framework.- Strong understanding of object-oriented programming principles and design patterns.- Proficiency in ReactJS and related technologies (e.g., Redux, Hooks).- Experience with RESTful API design and development.- Experience with relational databases (e.g., SQL Server, PostgreSQL).- Experience with unit testing and integration testing.- Experience with version control systems (e.g., Git).- Experience with Agile development methodologies.- Excellent communication and collaboration skills. Bonus Points: - Experience with Azure cloud platforms;- Experience with containerization technologies (e.g., Docker, Kubernetes).- Experience with CI/CD pipelines. Our benefits include: - Premium Healthcare- Meal voucher- Maternity and Parental leaves- Mobile services subsidy- Sick pay-Life insurance- CI&T University - Colombian Holidays- Paid VacationsAnd 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.