[Job - 32535] Mid-Level .NET Developer, Brazil
Summary
Mid-Level .NET Developer at CI&T (Brazil) maintaining and improving ASP.NET/.NET Core web applications with React frontends. Focus on modernizing login/security (OAuth2, OIDC, JWT, identity providers), upgrading .NET Core versions, and working with AWS, MySQL/PostgreSQL, Bitbucket, Playwright, and CI/CD — communicating with stakeholders 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 Mid-Level .NET Developer to maintain and improve our web applications built with .NET and React. A key focus of this role is modernizing how the applications handle user login and security (authentication and authorization), and updating our code to use newer .NET Core versions.
You will work with a team that values clear communication and collaboration. You will talk directly with stakeholders to understand what needs to be done and help prioritize tasks.
What You Will Do
- Maintain and improve existing ASP.NET and .NET Core web applications
- Design and build modern login and security systems (OAuth2, OIDC, JWT, and identity providers)
- Plan and execute upgrades to newer .NET Core versions
- Work with AWS, MySQL, PostgreSQL, and external services
- Use Bitbucket and automated testing tools (Playwright) to deliver quality code
- Work with CI/CD pipelines to automate testing and deployment
- Communicate in English with stakeholders to discuss priorities and understand requirements
What You Need to Know
- 5+ years of professional experience with .NET (C#) and web development
- Proven experience with authentication and authorization systems
- Proven experience with upgrading .NET versions
- Experience with React in production applications
- Experience with AWS and relational databases (MySQL, PostgreSQL)
- Experience with third-party API integrations
- Comfortable with Bitbucket/Git and version control
- Experience with automated testing (Playwright is a plus)
- Advanced English proficiency and strong communication skills
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Skills
As published by lever · 23 questions · 3 written answers
Basics
Resume/CV, Full name, Pronouns, Email, Phone, Current location, Current company, LinkedIn URL
Short answers (6)
- If the previous answer is Yes, please share the name(s) of these individuals. optional
- What is your salary expectation? Only the numeric value (no currency, text, or benefits)/ Qual é a sua pretensão salarial? Apenas o valor numérico (sem moeda, texto ou benefícios).
- If you feel comfortable, please share your current or last salary and benefits / Caso se sinta confortável, compartilhe seu salário atual ou ultimo e benefícios optional
- Which city/state do you currently reside in? Qual cidade/estado reside atualmente? optional
- How comfortable do you feel working in an English-speaking environment?
- Confirm the name of the company where you work/ Confirme o nome da empresa em que você trabalha atualmente
Pick from a list (13)
- 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? optional
- Do you have availability for on-site work at the Campinas office (Brazil) every day? Just for informational purposes, in case your application is considered for other open positions. optional
- Do you require any type of accessibility for the selection process and/or in your daily life?? optional
- The answers below are optional. This data will be used for our affirmative actions. Considering this scenario, do you feel comfortable answering the questions below? optional
- Would you like to tell us your gender identity? optional
- Are you part of the LGBTQIAP+ community? optional
- How do you self-declare your color/race? optional
- Are you a person with disabilities? optional
- If so, tell us what type of disability you have 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
- [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
Written answers (3)
- For how long have you worked with .Net?
- Do you have experience with AWS, Azure or Google Cloud?
- How long have you worked in Development?
Attachments (1)
- IMPORTANT! If you answered that you are a person with a disability, this step is mandatory. Attach the medical report here optional