Senior FullStack Developer – .NET, Javascript, React

🔥 2 minutes ago

🇧🇷 Brazil – Remote

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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CI&T

WebsiteLinkedInAll Job Openings

5001 - 10000 employees

Founded 1995

💼 Consulting

🏥 Healthcare

📣 Marketing

💰 $5.5M Venture Round on 2014-04

Consulting • Healthcare • Marketing

CI&T is a global tech transformation specialist focusing on helping organizations navigate their technology journey. With services spanning from application modernization and cloud solutions to AI-driven data analytics and customer experience, CI&T empowers businesses to accelerate their growth and maximize operational efficiency. The company emphasizes digital product design, strategy consulting, and immersive experiences, ensuring a robust support system for enterprises in various industries.

📋 Description

• Design, build, test, and maintain scalable, secure, and resilient fullstack applications using .NET Core and React • Address security vulnerabilities across frontend and backend codebases using modern secure coding standards and OWASP principles • Translate architectural guidelines into clean, maintainable, and well-tested code • Contribute actionable technical insights to team design discussions • Monitor, troubleshoot, and optimize application performance, reliability, and backend/frontend interactions • Use AI tools and agentic workflows such as Claude Code to accelerate feature delivery, cross-file refactoring, and automated testing • Drive unit, integration, and end-to-end test coverage • Enforce code quality and CI/CD standards within the development pipeline • Conduct peer code reviews • Mentor junior and mid-level developers • Foster a collaborative, continuous-learning culture

🎯 Requirements

• Proven experience in backend development with deep expertise in .NET Core (C#) • Familiarity with ASP.NET and legacy ASP.NET • Strong hands-on proficiency in JavaScript, TypeScript, and React • Experience using Claude Code via terminal, IDE, and GitHub integrations • Practical experience applying AI agents and AI-driven workflows across the software development life cycle • Solid understanding of SOLID and DRY principles • Knowledge of microservices and monolithic design patterns • Experience with relational and non-relational databases, including SQL Server, PostgreSQL, and MySQL • Experience with query optimization and schema design • Familiarity with AWS, containerization, RESTful API design, Git, and automated CI/CD pipelines • Experience diagnosing and resolving complex technical issues in production environments • Excellent written and verbal communication skills • Eagerness to learn new languages, frameworks, and engineering tools • Genuine interest in leveraging AI technologies to enhance development efficiency and code quality

🏖️ Benefits

• Health and dental insurance • Meal and food allowance • Childcare assistance • Extended paternity leave • Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass • Profit Sharing and Results Participation (PLR) • Life insurance • Continuous learning platform (CI&T University) • Discount club • Free online platform dedicated to physical, mental, and overall well-being • Pregnancy and responsible parenting course • Partnerships with online learning platforms • Language learning platform • Inclusion support and accommodations for people with disabilities • Dedicated Health and Well-being team • Inclusion specialists and affinity groups