Senior Fullstack Engineer (React.Js & .Net)

We're looking for a Full Stack Developer to join our team, with a strong emphasis on frontend development using React and TypeScript.

In this role, you'll primarily focus on building high-quality user interfaces while also contributing to backend services built with .

NET/C# when needed.We value engineers who enjoy solving complex problems, take ownership of their work, and dive deep into understanding the business domain.

You should be comfortable designing scalable service contracts, working with clean and maintainable data structures, and collaborating across teams.Responsibilities:Develop and maintain modern, scalable frontend applications using React + TypeScriptCollaborate on backend services and APIs using .

NET / C#Design and consume RESTful APIsEnsure code quality through testing, code reviews, and best practicesContribute to architectural decisions and technical improvementsWork closely with cross-functional teams in an Agile environmentRequirements: English:Avanced or Fluent English comunication skillsLanguagesStrong proficiency in JavaScript / TypeScript (ES6+)Working knowledge of C#Solid experience with HTML, CSS, and SCSSFrontendReact (v18+), including functional components and hooksState management with Redux / Redux ToolkitUI frameworks such as Bootstrap / React-BootstrapExperience with AG Grid or similar enterprise-grade data gridsTesting with Jest and React Testing LibraryFamiliarity with Webpack or similar build toolsBackendExperience with .

NET 8 / ASP.NET Core Web APIStrong understanding of RESTful API designExperience with MongoDB or other NoSQL databasesTools & PracticesProficiency with Git (branching, merging, code reviews)Experience with CI/CD pipelines (e.g., GitLab CI/CD)Familiarity with Agile/Scrum methodologiesNice to have:Experience with Redux Saga or similar middlewareEnd-to-end testing using PlaywrightKnowledge of MediatR / CQRS patternsValidation frameworks like FluentValidationAuthentication/authorization with Auth0, OAuth 2.0, or JWTExperience with Redis or distributed cachingExposure to Kubernetes / HelmInfrastructure as Code (e.g., Terraform)Cloud experience with AWS (e.g., Lambdas, Secrets Manager)Observability tools like DatadogReal-time communication using SignalRObject mapping tools like Mapster or AutoMapperAvenue Code reinforces its commitment to privacy and to all the principles guaranteed by the most accurate global data protection laws, such as GDPR, LGPD, CCPA and CPRA.

The Candidate data shared with Avenue Code will be kept confidential and will not be transmitted to disinterested third parties, nor will it be used for purposes other than the application for open positions.

As a Consultancy company, Avenue Code may share your information with its clients and other Companies from the CompassUol Group to which Avenue Code's consultants are allocated to perform its services.