Senior .NET Developer

CI&TBrazil

On-site Full-time

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Experience Level

Senior

Qualifications

To succeed in this role, candidates should have a robust background in C# and . NET development, along with experience in creating scalable software solutions. Familiarity with web technologies and database management, as well as a proactive approach to troubleshooting, will be essential.

About the job

CI&T blends deep technical experience with AI to deliver scalable solutions. With a global workforce of over 8,000 and a 30-year track record, the company partners with more than 1,000 clients worldwide. Embracing Artificial Intelligence is central to CI&T’s approach.

Role overview

This Senior . NET Developer position focuses on designing, developing, and maintaining core software applications. The role involves working closely with cross-functional teams to deliver scalable, high-performance solutions that align with client goals. Strong knowledge of the . NET ecosystem is essential for architecting server-side logic, managing databases, and integrating web services and REST APIs.

What you will do

Collaborate with frontend developers and stakeholders to deliver complete software solutions
Write, maintain, and optimize efficient, testable, and reliable C# code using . NET Core or . NET 6+
Develop and enhance web services and REST APIs, focusing on high availability and low latency
Contribute to clean architecture, following SOLID principles and industry standards
Take initiative in troubleshooting, root cause analysis, and ongoing codebase improvements

Requirements

Significant experience with C# and the . NET framework
Proficiency in building and consuming REST APIs and working with ASP. NET Core
Familiarity with relational databases such as SQL Server or PostgreSQL, and experience with Entity Framework
Strong understanding of Object-Oriented Programming (OOP) and common design patterns
Experience with version control systems (Git) and project management tools (preferably JIRA)
Advanced English proficiency in reading and writing

Preferred qualifications

Experience with Azure or AWS services and CI/CD practices
Knowledge of unit testing frameworks such as xUnit, NUnit, or MSTest
Familiarity with JavaScript frameworks (React, Angular) or Blazor
Background in Agile or Scrum methodologies

About CI&T

CI&T is a leader in technology transformation, harnessing the power of AI to provide innovative tech solutions. With a diverse workforce and a solid history of successful partnerships, we are committed to making AI a reality in business.

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About the Department: The department is responsible for the technological platform of Collateral for international/offshore Cayman products. We engage in the development and integration of new financial products to enhance the risk reporting for clients with accounts in Cayman. Our systems are fully cloud-hosted using .Net C#. Our team collaborates directly with BackOffice users to understand their evolving needs and find ways to contribute to the bank's core business. We also interface with various internal departments to facilitate the advancement of our risk reports. Your Daily Responsibilities: Engage in and promote agile software development practices; Maintain relationships with other IT and business teams across all BTG Pactual locations; Propose and discuss new solutions and technologies, assisting in the definition of system integrations using queues, APIs, and AWS resources; Possess extensive experience with AWS cloud services; Assist in optimizing resources and costs related to cloud computing; What We Expect From You: Strong knowledge of .NET frameworks and C# programming; Ability to collaborate effectively in a team environment; Experience in financial product development is a plus; Strong problem-solving skills and attention to detail; Excellent communication skills in both Portuguese and English.

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Encora is looking for a .NET/C# Backend Developer based in Brazil. This role focuses on building and maintaining backend systems that support ongoing projects. What you will do Develop backend solutions using .NET and C# Work closely with a team to design and implement scalable applications Contribute technical expertise throughout the development process Requirements Experience with .NET and C# development Ability to collaborate with others on technical projects Strong problem-solving skills This position offers the chance to work on projects that use modern technologies and support innovative solutions.

Apr 29, 2026

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Senior .Net Developer

CI&T

Full-time|Remote|Brazil

Join us at CI&T, where we specialize in tech transformation, synergizing human expertise with artificial intelligence to craft scalable technology solutions.With a global team of over 8,000 professionals, we have established partnerships with more than 1,000 clients in our 30-year journey. AI is at the forefront of our mission.We are seeking a Senior .Net Developer to join our dynamic team! Key Responsibilities:Develop and sustain high-quality C# code across our microservices environment.Implement intricate business logic for a major player in the food industry.Prioritize and manage your workload to deliver high-quality, efficient solutions.Document your work and contribute to the continuous integration/continuous delivery (CI/CD) processes.Design APIs that enhance communication between our microservices.Apply messaging patterns for asynchronous communication between services.Integrate external systems and databases while ensuring system integrity.Guarantee effective error handling and reliability in service communications.Write comprehensive unit and integration tests for C# components.Conduct code reviews to uphold code quality and architectural integrity.Troubleshoot and resolve complex technical challenges within the service ecosystem.Mentor junior developers on C# best practices and design patterns.Engage in technical decision-making and architectural discussions. Requirements:Professional experience with C# and .NET development.Strong knowledge of .NET Core/5+ and ASP.NET Core Web API.Experience with microservices architecture and distributed systems.Proficiency in asynchronous programming patterns in C# (Task, async/await).Advanced C# programming skills including LINQ, generics, and reflection.Experience with dependency injection and inversion of control patterns.Familiarity with ORM frameworks (Entity Framework Core).Knowledge of RESTful API design and implementation.Experience with SQL Server and writing efficient queries.Understanding of data access patterns and transaction management.Knowledge of database performance optimization techniques.Experience with data serialization formats (JSON, XML).Proficiency in unit testing frameworks (xUnit, NUnit, or MSTest).Experience with mocking frameworks (Moq, NSubstitute).Familiarity with containerization using Docker.Fluent in English.Knowledge in Identity and Access Management (IDAM). Preferred Qualifications:Experience in agile methodologies and project management.

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Senior Software Development Analyst (.Net)

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Apr 29, 2026

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Senior Fullstack Developer (.NET & Angular)

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CI&T desenvolve soluções tecnológicas escaláveis, combinando conhecimento humano e Inteligência Artificial. Com mais de 8.000 profissionais e três décadas de atuação, a empresa mantém parcerias com mais de 1.000 clientes. Atenção: Profissionais que moram na Região Metropolitana de Campinas precisam comparecer presencialmente ao escritório, conforme as diretrizes internas. Sobre a vaga Buscamos um(a) Senior Fullstack Developer com experiência em .NET (C#) e Angular para atuar em projetos de um cliente estratégico. O papel envolve liderar o desenvolvimento e evolução de sistemas, tanto modernos quanto legados, sempre com foco em soluções escaláveis, desempenho e experiência do usuário. O uso de boas práticas de engenharia e ferramentas de IA generativa (GenAI) faz parte do dia a dia para acelerar entregas de valor. O que vai fazer Participar de processos de discovery, refinamento técnico e definição de arquitetura Desenvolver e aprimorar aplicações backend em .NET (C#) e frontend com Angular Manter, evoluir e modernizar sistemas legados Implementar arquiteturas escaláveis, como microserviços, monólitos modulares e Clean Architecture Criar e integrar APIs REST e aplicações frontend Garantir qualidade com testes automatizados (unitários, integração e frontend) Monitorar logs e métricas para observabilidade Analisar e resolver problemas em produção Otimizar performance, tanto no backend quanto no frontend Gerenciar build, versionamento e deploy das aplicações Requisitos técnicos Experiência sólida com .NET (C#) e desenvolvimento backend Conhecimento em Angular e desenvolvimento frontend moderno Proficiência em APIs REST e comunicação cliente-servidor (HTTP/HTTPS) Vivência com bancos de dados relacionais, como SQL Server ou PostgreSQL Compreensão de arquitetura de aplicações (camadas, microserviços, monólitos modulares) Diferenciais Conhecimento em Clean Architecture e separação de camadas Boas práticas de frontend, incluindo componentização e gerenciamento de estado Experiência com versionamento usando Git Integração entre frontend e backend (consumo de APIs, tratamento de erros) Uso de IA no dia a dia Ganhar produtividade no desenvolvimento Apoiar refatoração de código e arquitetura Gerar e aprimorar testes Auxiliar na análise de problemas complexos

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Software Developer Analyst .NET - Customer Intelligence

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Mid-level Fullstack Developer (.NET & Angular) - Brazil

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Senior .NET Developer at CI&T | Brazil

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Apr 20, 2026

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Apr 21, 2026

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Full-time|On-site|Brazil

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Apr 28, 2026

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