[Job - 31975] Mid-Level .NET Developer, Colombia

OpenKrill; United States; Hybrid; USD 85,000 - 125,000; 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 is seeking a Mid-Level .NET Engineer to join our team and drive design, build, and integration of robust back-end services. You will work with a multicultural group across the USA, Brazil, Colombia, and the UK, communicating in English daily to deliver scalable solutions.

You will contribute to API design (SOAP/REST), CI/CD, and automation, while mentoring junior engineers and staying current with emerging technologies to improve software quality and velocity.

Qualifications

• 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.

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.

Skills

C#

Unit testing

Code reviews

Mentoring

Tools

ADO.NET

SQL Server

SOAP

REST APIs

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.

We are looking for a Mid-Level .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.

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.

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.