[Job - 32702] Senior .NET Developer, Colombia

CI&T; Colombia; On-site; COP 120,000,000 - 190,000,000; Full time

Benefits offered by this job

Premium Healthcare

Meal voucher

Maternity and Parental leaves

Mobile services subsidy

Sick pay-Life insurance

CI&T University

Colombian Holidays

Paid Vacations

Job summary

CI&T in Colombia is seeking a Senior .NET Engineer to join our back-end team. You will design and maintain services with C#, ADO.NET, and SQL Server, build SOAP/REST APIs, and uphold reliability through testing, troubleshooting, and best practices.

You’ll mentor juniors, participate in code reviews, contribute to CI/CD, and stay current with new tech while communicating in English within a multicultural global team across Brazil, Colombia, the UK, and the USA.

Qualifications

• Strong experience with .NET Framework and .NET Core in production systems.
• Solid understanding of ADO.NET and SQL Server, with hands-on experience in database design and performance tuning.
• Proficient in developing SOAP and RESTful services, including XML serialization/deserialization.
• Strong grasp of software design patterns and best practices.
• Effective communicator who thrives in fast-paced, multicultural teams.
• Advanced English proficiency is a must.

Responsibilities

• 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.

Skills

.NET Framework

.NET Core

ADO.NET

SQL Server

SOAP & REST

Design Patterns

English Proficiency

Communication

Tools

Azure

Job description

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 aSenior .NET Engineerto 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,

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.