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.NET Developer Senior, Colombia

🔥 21 hours ago
C#.NET Framework.NET CoreADO.NET
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📜 Description

  • Design, build, and maintain back-end services using C#, ADO.NET, and SQL Server.
  • Create and improve SOAP and REST APIs, following best practices and version standards.
  • Write unit and integration tests; investigate issues and perform root-cause analysis.
  • Integrate systems and services using software design patterns.
  • Review code, guide junior developers, and help the team adopt technologies and best practices.
  • Contribute to CI/CD workflows for automated testing and deployment.

🛠️ Requirements

  • Takes ownership of your work and always looks for ways to improve
  • Communicates clearly with both technical and non-technical people
  • Works well with others and values the team’s success
  • Can adapt when requirements change or situations are unclear
  • Experience with cloud platforms (preferably Azure)
  • Knowledge of specification-driven development (building code based on clear requirements)
  • Exposure to Agile development methods
  • Understanding of modern software development approaches#LI-THAI23

✨ Benefits

  • Premium Healthcare
  • Meal voucher
  • Maternity and Parental leaves
  • Mobile services subsidy
  • Sick pay-Life insurance
  • CI&T University
  • Paid Vacations
Full 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 hiring a Senior .NET Engineer to join our team and help build complex back-end software solutions. You will work with a multicultural team spread across Brazil, Colombia, the UK, and the USA. All communication will be in English.

As a Senior .NET Engineer, you will design solutions, help guide less experienced developers, and help the team adopt new technologies and best practices.

What You Will Do

  • Design, build, and maintain back-end services using C#, ADO.NET, and SQL Server
  • Create and improve SOAP and REST APIs (following best practices and version standards)
  • Write unit tests and integration tests to make sure services work correctly
  • Find and fix problems in the code (root-cause analysis)
  • Help integrate different systems and services together (using software design patterns)
  • Review other developers’ code and provide guidance to junior team members
  • Learn about new technologies and find ways to improve our current solutions
  • Work on CI/CD workflows (automated testing and deployment) to improve how the team works

What You Need to Know

  • Strong experience with .NET Framework and .NET Core in real production systems
  • Deep knowledge of ADO.NET and SQL Server
  • Experience with database design and making databases work faster
  • Hands-on experience building SOAP and REST APIs
  • Ability to work with XML (reading and writing XML data)
  • Strong understanding of software design patterns and best practices
  • Advanced English proficiency
  • Ability to work well in multicultural, fast-paced teams

Soft Skills

  • Takes ownership of your work and always looks for ways to improve
  • Communicates clearly with both technical and non-technical people
  • Works well with others and values the team’s success
  • Can adapt when requirements change or situations are unclear

Nice to Have

  • Experience with cloud platforms (preferably Azure)
  • Knowledge of specification-driven development (building code based on clear requirements)
  • Exposure to Agile development methods
  • Understanding of modern software development approaches

    #LI-THAI23
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. 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.
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