Mid-Level/Senior Backend Developer (.NET/AWS) - Brazil

CI&TBrazil

On-site Full-time

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Experience Level

Mid to Senior

Qualifications

Solid experience with . NET developmentProficient in AWS servicesStrong understanding of software architecture principlesAbility to collaborate effectively with diverse teamsCommitment to delivering high-quality work

About the job

We are experts in technological transformation, merging human expertise with AI to create scalable tech solutions. With over 8,000 CI&Ters around the globe, we have partnered with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality.

Important: If you reside in the Metropolitan Region of Campinas, your presence at the city’s offices will be mandatory, in accordance with our attendance policy.

Hello, this is Wal from CI&T!

I am part of the Talent Attraction team and am looking for professionals located in Brazil for the position of Mid-Level/Senior Backend Developer (. NET/AWS), who will work on a project in the financial sector.

You will be involved in developing high-performance and scalable . NET systems, directly contributing to the evolution of Brazil's largest banking institution. We value candidates who possess architectural vision, commitment to quality, and the ability to guide teams.

What You Will Do

Architect and develop . NET systems with a focus on performance and scalability
Collaborate with multidisciplinary teams in the design and implementation of solutions
Maintain and evolve existing systems through best practices

About CI&T

CI&T is a leader in technological transformation, utilizing advanced AI to deliver innovative and scalable solutions to clients across various industries for over three decades. We are committed to fostering an inclusive and collaborative work environment.

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Senior .NET Developer

CI&T

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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 mai…

Apr 29, 2026

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.NET Developer | IT Offshore

BTG Pactual

Full-time|On-site|São Paulo, São Paulo, Brazil

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.

Mar 18, 2026

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.NET/C# Backend Developer

Encora

Full-time|Remote|Brazil

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.

Mar 30, 2026

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Senior Software Development Analyst (.Net)

Experian

Full-time|On-site|Blumenau

Join Experian as a Senior Software Development Analyst, where you will leverage your expertise in .Net technologies to craft innovative software solutions. Collaborate with a dynamic team to enhance our product offerings and drive technological advancements. This role demands a strong analytical mindset and a passion for developing high-quality software.

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Platform Adoption Developer (.NET/C#)

Encora

Full-time|Remote|Brazil

Location: BrazilJob Mode: Full-timeWork Mode: Work from home Role overview Encora seeks a Platform Adoption Developer with strong .NET and C# skills to build and integrate core platform services for the Human Capital Management (HCM) product suite. This role focuses on developing the Foundation Data Model, Unified Authentication, and a Common Admin Console. The position requires expertise in the Microsoft technology stack and enterprise identity systems to support the migration and modernization of HCM products. What you will do Design and integrate backend services for the Foundation Data Model and CMT using C# and .NET Core. Configure and implement a Single Authentication Entry Point for HCM products, working with enterprise identity standards such as SAML and SSO, and integrating with providers like Okta. Architect and query relational databases using SQL to manage core entity data. Develop user interface components for the Common Administration Console with Angular. Work with messaging queues (RabbitMQ) and search/logging tools (Elastic) to ensure reliable and scalable platform services. Provide technical support and guidance to product teams during their migration process within the HCM portfolio. Requirements Proficiency in backend development with C# and .NET Core Experience with identity protocols and tools: OIDC, SAML, SSO, Okta Strong SQL skills (SQL Server, PostgreSQL, or similar) Front-end development experience with Angular Familiarity with RabbitMQ and Elastic for messaging and search/logging

Apr 29, 2026

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Senior Fullstack Developer (.NET & Angular)

CI&T

Full-time|On-site|Brazil

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

Apr 17, 2026

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Software Developer Analyst .NET - Customer Intelligence

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Join the Inter Team!At Inter, we believe that every day is a new opportunity to shape the future through the technology you create, the connections you foster, and the ideas you share. We are a Super App offering comprehensive solutions in digital banking, investments, credit, insurance, a marketplace, and other everyday services. But we are much more than that: we are a dynamic team continuously evolving.This pace brings forth new opportunities. Now it’s your chance to discover this intelligent way to invest in your career. Come and be part of the #sanguelaranja family!About the Role and MissionAs a member of the Customer Intelligence team, you will be responsible for developing and enhancing applications and microservices in .NET, ensuring quality, performance, security, and integration with other systems.Your Daily Tasks Will Include:Developing and maintaining APIs and microservices using C# and .NET (ASP.NET Core).Modeling RESTful APIs following the API First approach (Swagger/OpenAPI).Participating in code reviews and adhering to team coding and architectural standards.Writing automated tests (unit and integration) with xUnit, NUnit, or MSTest.Integrating services with relational and non-relational databases using ORMs (Entity Framework Core, Dapper).Implementing secure solutions using authentication/authorization (OAuth2, OpenID Connect, JWT).Documenting technical decisions and collaborating with the team on various projects.

Apr 2, 2026

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Mid-Level .NET Developer | IT Equities

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About the Department:Our team is dedicated to developing and maintaining the post-trade equity platform at BTG Pactual. We create comprehensive solutions that integrate various areas of the bank, aiming to provide a robust technological framework for our internal and external clients while ensuring alignment with the clearinghouse and the equity market in Brazil. Your Daily Responsibilities:Engage actively in the design and structuring of solutions in collaboration with the business area.Have the autonomy to propose ideas that will impact the area’s results and the evolution of our platform.Develop systems using current technologies and have direct contact with a continuously evolving product.

Mar 18, 2026

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Senior FullStack Developer (.NET/Angular) at ciandt | Brazil

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About ciandt ciandt brings together human expertise and AI to deliver scalable technology solutions. With a team of more than 8,000 professionals worldwide, ciandt has partnered with over 1,000 clients during its 30 years in business. Artificial Intelligence plays a central role in the company’s approach and operations. Location Requirement Important: Candidates living in the Metropolitan Region of Campinas must work onsite at our Campinas office, following our current attendance policy. Role Overview We are seeking a Senior FullStack Developer with strong experience in .NET and Angular. The role focuses on building scalable, high-performance applications using modern architectures and the Azure ecosystem.

Apr 17, 2026

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

CI&T

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CI&T seeks a Mid-level Fullstack Developer (.NET & Angular) based in Brazil. This position supports a contract management project for a client in the financial sector. The team values proactive and resilient contributors who can handle daily challenges and help drive project outcomes. Note: Candidates living in the Metropolitan Region of Campinas must follow the company's current in-office attendance policy. Role overview This role centers on developing and maintaining contract management applications. The work involves collaborating with a team to deliver solutions that align with client requirements. Key responsibilities Develop applications using .NET and Angular Apply practical knowledge of AWS services Work within agile development frameworks Technologies used .NET Core / .NET: Build and maintain applications with recent .NET versions Angular: Create dynamic, responsive user interfaces AWS: Use services like RDS, DynamoDB, Lambda, and SQS RESTful APIs: Build and consume APIs Relational Databases: Work with database operations Git: Manage code using version control Microservices: Apply knowledge of microservices architecture

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Senior .NET Developer at CI&T | Brazil

CI&T

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At CI&T, we are leaders in tech transformation, merging human talent with AI to deliver scalable technology solutions.With a global team of over 8,000 professionals, we proudly partner with more than 1,000 clients, showcasing three decades of innovation. Artificial Intelligence is at the core of our operations.We are on the lookout for a skilled Senior .NET Developer to join our innovative team! Key Responsibilities:Design, develop, and uphold high-quality C# code within our microservices architecture.Implement intricate business logic for a prominent client in the food industry.Prioritize tasks effectively to ensure the delivery of performant solutions.Maintain comprehensive documentation and engage in CI/CD processes.Create APIs to enhance communication between microservices.Apply messaging patterns to facilitate asynchronous service communication.Integrate external systems and databases while preserving system integrity.Implement robust error handling and ensure resilience in service interactions.Develop thorough unit and integration tests for C# components.Conduct code reviews to uphold code quality and architectural standards.Troubleshoot complex technical issues within the service ecosystem.Guide junior developers in C# best practices and design patterns.Participate actively in technical decision-making and architectural planning. Required Qualifications:Proven experience with C# and .NET development.In-depth knowledge of .NET Core/5+ and ASP.NET Core Web API.Experience working with microservices architecture and distributed systems.Strong proficiency in asynchronous programming patterns in C# (Task, async/await).Advanced skills in C#, including LINQ, generics, and reflection.Experience with dependency injection and inversion of control patterns.Familiarity with ORM frameworks such as Entity Framework Core.Knowledge of RESTful API design and implementation.Experience with SQL Server and crafting efficient queries.Understanding of data access patterns and transaction management.Familiarity with database performance optimization techniques.Experience with data serialization formats (JSON, XML).Proficiency in unit testing frameworks (xUnit, NUnit, or MSTest).Familiarity with mocking frameworks (Moq, NSubstitute).Experience with Docker for containerization.Fluent in English. Preferred Qualifications:

Mar 30, 2026

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Mid-Level/Senior Backend Developer (.NET/AWS) - Brazil

CI&T

Full-time|On-site|Brazil

We are experts in technological transformation, merging human expertise with AI to create scalable tech solutions. With over 8,000 CI&Ters around the globe, we have partnered with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality.Important: If you reside in the Metropolitan Region of Campinas, your presence at the city’s offices will be mandatory, in accordance with our attendance policy.Hello, this is Wal from CI&T!I am part of the Talent Attraction team and am looking for professionals located in Brazil for the position of Mid-Level/Senior Backend Developer (.NET/AWS), who will work on a project in the financial sector.You will be involved in developing high-performance and scalable .NET systems, directly contributing to the evolution of Brazil's largest banking institution. We value candidates who possess architectural vision, commitment to quality, and the ability to guide teams.What You Will DoArchitect and develop .NET systems with a focus on performance and scalabilityCollaborate with multidisciplinary teams in the design and implementation of solutionsMaintain and evolve existing systems through best practices

Apr 30, 2026

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Intern Software Developer .NET/Java | BTG Empresas

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Senior .NET Developer at CI&T | Brazil

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Apr 20, 2026

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Mid Level Fullstack Developer (.Net + Angular) at ciandt | Brazil

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Apr 30, 2026

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Senior Software Developer (.NET / VB6) at CI&T | Brazil

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Senior .NET Engineer - Remote Opportunity

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Capital Markets Gateway LLC (CMG) is a fintech company working to modernize global equity capital markets through advanced data solutions and technology. The CMG platform brings together buy-side and sell-side workflows, providing ECM analytics and supporting major financial institutions and investment banks. Founded by ECM specialists in 2017, CMG now serves nearly 150 buy-side firms managing $40 trillion in assets, along with 22 global investment banks. More information is available at www.cmgx.io. Role overview CMG is seeking a Senior .NET Engineer based in Brazil for a fully remote role. This position centers on designing, building, and maintaining enterprise solutions for the financial sector. What you will do Design, develop, and maintain scalable and secure systems using .NET technologies Collaborate with frontend engineers, product managers, and QA to support reliable data flow and service integration Optimize system performance and contribute to architectural improvements Follow best practices in software development, security, and deployment to ensure dependable product delivery Collaboration This position involves frequent coordination with cross-functional teams to maintain system reliability and smooth integration across services.

Apr 21, 2026

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Senior .NET Software Engineer

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Full-time|On-site|Brazil

Role overview Jobgether seeks a Senior .NET Software Engineer to join the team in Brazil. This position centers on designing, developing, and maintaining software applications built with the .NET framework. The Senior Engineer will work with colleagues from various areas to deliver dependable, high-quality products that support a better user experience. What you will do Design and build software solutions using the .NET framework Maintain and enhance existing applications Work with cross-functional teams to achieve project objectives Support efforts to improve product quality and user experience Location This role is based in Brazil.

Apr 28, 2026

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