[Job - 31975] .NET Developer Senior, Colombia
Summary
Senior .NET engineer at CI&T designing, building, and maintaining back-end services with C#, ADO.NET, and SQL Server — including SOAP/REST APIs, unit/integration testing, code reviews, mentoring juniors, and CI/CD workflows — on a multicultural team communicating in English.
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
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Skills
As published by lever · 23 questions · 5 written answers
Basics
Resume/CV, Full name, Pronouns, Email, Phone, Current location, Current company, LinkedIn URL
Short answers (5)
- How comfortable do you feel working in an English-speaking environment?
- Please, confirm country and city where you are currently living
- When will you be available to start working with us? (DD/MM/AAAA)
- If the previous answer is Yes, please share the name(s) of these individuals. optional
- Confirm the name of the company where you work/ Confirme o nome da empresa em que você trabalha atualmente
Pick from a list (13)
- [EN] What is your level of confidence when communicating and collaborating in an English-speaking work environment? optional
- [ES] What is your level of confidence when communicating and collaborating in an Spanish-speaking work environment? optional
- How did you hear about our job opening? optional
- Do you have any relatives (such as parents, siblings, in-laws, spouses, or children, stepchildren, stepfather/stepmother, son-in-law/daughter-in-law), close friends, or acquaintances (with whom you have a significant and ongoing relationship) who currently work at CI&T?
- Are you legally authorized to work in Colombia?
- Do you require any type of accessibility for the selection process and/or in your daily life??
- Will you now or in the future require sponsorship for Colombia's employment visa status?
- Would you like to tell us your gender identity? We ask about gender identity to better understand and support the diverse identities of our employees and to ensure our workplace is inclusive. optional
- Are you part of the LGBTQIAP+ community? optional
- How would you self-declare? Collecting information on ethnic backgrounds allows us to ensure our diversity and inclusion efforts are effective and to address any potential disparities. optional
- To understand better your necessities or any accommodations you need for our process & interviews, we would like to know if you are a person with disabilities? optional
- If applicable, please tell us what type of disability you have: (Edit to include options:) optional
- By selecting the option below, I declare that I have read, understood, and agree to the terms of this document, and I consent to the processing of my personal data by CI&T and Lever for the purposes described herein. Read the document here: https://drive.google.com/file/d/1dMaskYl2VD1AtN9MfiHrZiA-YFYwq8aI/view optional
Written answers (5)
- What is your salary expectation? (please inform the gross amount in Colombian Pesos)
- How long have you worked in Development?
- For how long have you worked with .Net?
- How long have you worked with Azure?
- Do you have experience in CI/CD? And DevSecOps?