Senior .NET Backend Developer

🔥 27 minutes ago

🇧🇷 Brazil – Remote

⏰ Full Time

🟠 Senior

🔙 Backend 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, develop and maintain RESTful APIs and backend services using C# and .NET 8+ • Apply Clean Architecture, SOLID and KISS principles to keep code modular, reusable and simple • Build event-driven and asynchronous integrations using Azure Service Bus, RabbitMQ or Kafka • Model, query and optimize relational databases such as PostgreSQL and SQL Server using Entity Framework Core • Work with document databases such as MongoDB when needed • Implement secure authentication and authorization using OAuth2/OIDC and JWT • Write and maintain automated unit and integration tests using xUnit, NSubstitute and Bogus • Contribute to CI/CD pipelines, including Azure DevOps and YAML pipelines, and follow branching strategies such as GitFlow • Instrument services for observability, including structured logging, metrics and tracing, and help diagnose production issues • Review code, including AI-generated code, to uphold quality, security and performance standards • Participate in code reviews, technical refinement and estimation, and mentor less experienced developers • Work with technical and non-technical stakeholders to turn requirements into pragmatic, maintainable solutions • Collaborate closely with Product, Architecture, QA and Frontend colleagues in a multicultural, fast-moving delivery environment

🎯 Requirements

• Solid experience as a backend developer working with C# and .NET, ideally .NET 8+, including production-grade RESTful APIs • Strong knowledge of object-oriented design, SOLID principles, design patterns and Clean Architecture • Hands-on experience with MediatR, AutoMapper and Entity Framework Core • Experience with relational databases such as PostgreSQL or SQL Server, including data modelling and query optimization • Experience with distributed systems and messaging, using technologies such as Azure Service Bus, Rebus, RabbitMQ, Kafka or equivalent • Practical use of AI tools in software development, such as GitHub Copilot, Claude, OpenAI APIs or similar, including AI-assisted code generation, testing and refactoring • Experience building autonomous or semi-autonomous agents for software development, or knowledge of prompt engineering and evaluating AI output quality • Experience with automated testing, including unit and integration testing and the use of test doubles • Working knowledge of Docker and Docker Compose • Familiarity with observability tools such as Datadog, Grafana, Application Insights or the ELK Stack • Experience with Git, CI/CD pipelines and Azure DevOps, or similar tools • Good communication skills and a collaborative, ownership-driven mindset • Good spoken and written English (upper-intermediate or above) • Nice to have: Knowledge of CQRS and Domain-Driven Design (DDD) • Nice to have: Experience with MongoDB, including document modelling and aggregation • Nice to have: Knowledge of Infrastructure as Code, using technologies such as Terraform, Bicep or ARM • Nice to have: Exposure to a frontend framework such as React, Angular or Vue, including API integration from the client side • Nice to have: Experience working in polyglot environments, such as Node.js, Python or Java

🏖️ 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 • Health and Well-being team, inclusion specialists, and affinity groups • Support and accommodations for people with disabilities during the selection process