Mid/Senior Fullstack Developer

Position Overview

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.

At CI&T, we are seeking a highly skilled and motivated Mid/Senior Fullstack Developer (.NET/Javascript/Typescript) to join our team in Colombia. You will contribute to an innovative project in a collaborative, innovative, transforming, and multicultural environment.

Responsibilities

• Design, build, and maintain robust applications using the Microsoft .NET stack (C#, ASP.NET)
• Develop dynamic, modern front-end interfaces using JavaScript and associated frameworks/libraries
• Write efficient, scalable SQL Server queries, functions, and stored procedures supporting both on-prem and Azure PaaS
• Leverage OpenSearch as part of our backend architecture for search and data analytics
• Optimize and troubleshoot full-stack performance, scalability, and system reliability issues
• Conduct and participate in code reviews, ensuring adherence to clean code practices
• Collaborate with QA and product teams to understand requirements and deliver complete, tested features

Must-Have Skills

• 5+ years of professional experience as a software developer
• Strong expertise in: C#, ASP.NET, and .NET Core
• Modern JavaScript (e.g., Angular, React, or Vue)
• SQL Server (including query optimization and performance tuning)
• OpenSearch/Elasticsearch
• Git (branching, pull requests, merge conflict resolution)
• Technical SEO knowledge covering canonical URLs, dynamic content rendering, and structured data optimization
• Deep understanding of full-stack applications and troubleshooting production issues
• Proven experience optimizing performance and identifying system bottlenecks
• Excellent communication skills—both verbal and written
• Ability to work autonomously and collaboratively in a fast-paced, agile environment

Nice-to-have Skills

• Familiarity with Azure PaaS services such as App Services, Azure Functions, and Storage Accounts
• Experience with Azure DevOps (pipelines, repositories)
• Working knowledge of geospatial data in PostgreSQL/PostGIS or similar

Join CI&T, where we are driven by Collaboration, Innovation & Transformation. In our fast-evolving landscape, your contributions will not only enhance our projects but also pave the way for breakthroughs powered by Artificial Intelligence. Together, let’s shape a bright future.

Our benefits

• 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.