C# Developer – .NET

AM53 Smart Solutions

C# / .NET Developer evolving backend solutions with ASP.NET Core and Windows desktop applications. Collaborating on integrations, logging, testing, and evolving APIs in modern .NET environment.

Posted 5/5/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

ASP.NETC#.NETPostgresSQL

About the role

Key responsibilities & impact

Evolve and maintain APIs in ASP.NET Core (controllers, middleware, dependency injection, configuration, request pipeline).
Develop HTTP integrations with partners/external services (JSON contracts, error handling, resilience).
Maintain and enhance WinForms modules (UI/screens, event handling, performance, and stability).
Implement data access using Dapper / Dapper.Contrib with SQL Server and PostgreSQL.
Ensure observability and diagnostics (logging with Serilog, NLog; troubleshooting and fixes).
Write and maintain automated tests and support test quality/coverage.
Participate in code reviews, refactorings, and technical decisions (continuous improvement).

Requirements

What you’ll need

Strong knowledge and practical application of design patterns and coding best practices: DRY, SOLID, GRASP.
Experience with agile frameworks (Scrum: story points, planning, retrospectives).
Solid experience with modern C# and .NET.
Experience with ASP.NET Core Web API (Swagger/OpenAPI, health checks, authentication/authorization).
Experience with Dapper and SQL databases (SQL Server and/or PostgreSQL).
Experience with HTTP integrations and JSON serialization (Newtonsoft.Json).
Experience with logging and troubleshooting (Serilog, NLog).
Experience with automated testing: xUnit and mocks using NSubstitute.
Strong knowledge of Git and branching strategies.
Broad experience with collaborative development best practices (pull requests, code review, merging).
Experience with CI/CD pipelines using GitHub Actions.

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account AM53 Smart Solutions Website LinkedIn All Job Openings 11 - 50 employees Founded 2010 💳 Fintech 🤝 B2B 🏢 Enterprise Fintech
B2B
Enterprise AM53 Smart Solutions is a consultancy and solutions provider focused on optimizing processes and productivity for the payments market. The company offers technical and business analysis, Business Intelligence strategy and implementation, custom application development, and specialized services around Verifone PAYware CMS (issuance and acquiring). AM53 also provides HR recruitment services for technology professionals and delivers integration products and connectors for payment systems. C# Developer – .NET Job not on LinkedIn 🔥 6 minutes ago 🇧🇷 Brazil – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇧🇷🇵🇹 Portuguese Required ASP.NET C# Postgres SQL .NET Apply Now Find Hiring Managers Customize resume for this job Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Evolve and maintain APIs in ASP.NET Core (controllers, middleware, dependency injection, configuration, request pipeline).
Develop HTTP integrations with partners/external services (JSON contracts, error handling, resilience).
Maintain and enhance WinForms modules (UI/screens, event handling, performance, and stability).
Implement data access using Dapper / Dapper.Contrib with SQL Server and PostgreSQL.
Ensure observability and diagnostics (logging with Serilog, NLog; troubleshooting and fixes).
Write and maintain automated tests and support test quality/coverage.
Participate in code reviews, refactorings, and technical decisions (continuous improvement). 🎯 Requirements
Strong knowledge and practical application of design patterns and coding best practices: DRY, SOLID, GRASP.
Experience with agile frameworks (Scrum: story points, planning, retrospectives).
Solid experience with modern C# and .NET.
Experience with ASP.NET Core Web API (Swagger/OpenAPI, health checks, authentication/authorization).
Experience with Dapper and SQL databases (SQL Server and/or PostgreSQL).
Experience with HTTP integrations and JSON serialization (Newtonsoft.Json).
Experience with logging and troubleshooting (Serilog, NLog).
Experience with automated testing: xUnit and mocks using NSubstitute.
Strong knowledge of Git and branching strategies.
Broad experience with collaborative development best practices (pull requests, code review, merging).
Experience with CI/CD pipelines using GitHub Actions. Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs Mid Level Fullstack Developer, Java, Angular 🔥 4 hours ago CI&T 5001 - 10000 🤖 Artificial Intelligence ☁️ SaaS Website LinkedIn All Job Openings Fullstack Developer for financial project at CI&T, specializing in technology transformation with a focus on AI solutions. 🇧🇷 Brazil – Remote 💰 $5.5M Venture Round on 2014-04 ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇧🇷🇵🇹 Portuguese Required Angular Docker Java JavaScript Kafka Spring Spring Boot SpringBoot TypeScript Senior Java Developer 🔥 4 hours ago Globalweb Corp 1001 - 5000 📋 Compliance 🔒 Cybersecurity Website LinkedIn All Job Openings Senior Java Developer responsible for coding, design, and maintenance of applications. Join a diverse team impacting solutions used by thousands of users in Brazil. 🇧🇷 Brazil – Remote ⏰ Full Time 🟠 Senior 🔙 Backend Engineer 🗣️🇧🇷🇵🇹 Portuguese Required Angular Hibernate Java Jenkins Kubernetes Maven OpenShift Oracle Backend Engineer – Wallets 🔥 5 hours ago Tether.to 11 - 50 ₿ Crypto 💳 Fintech 💸 Finance Website LinkedIn All Job Openings Backend Engineer developing robust and secure solutions for Tether's digital finance platform. Collaborating on groundbreaking projects with a focus on scalability and security. 🇧🇷 Brazil – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer JavaScript Microservices MongoDB MySQL Node.js Pessoa Desenvolvedora, Python – Sênior 🔥 6 hours ago Raro Labs 201 - 500 🤖 Artificial Intelligence ☁️ SaaS Website LinkedIn All Job Openings Senior Python Developer at Raro Labs focusing on innovative technology solutions. Working on web development using Python and Django to enhance client experiences. 🇧🇷 Brazil – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇧🇷🇵🇹 Portuguese Required Django Docker Flask Kafka NoSQL Python SQL Desenvolvedor Back-End III 🔥 6 hours ago GFT Technologies 10,000+ employees 🔒 Cybersecurity 📋 Compliance ☁️ SaaS Website LinkedIn All Job Openings Java Developer focusing on DevOps and Cloud at GFT. Developing and maintaining Java applications with microservices architecture and AWS ecosystem involvement. 🇧🇷 Brazil – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer 🗣️🇧🇷🇵🇹 Portuguese Required AWS DynamoDB GRPC Java Jenkins Kafka MongoDB Oracle Postgres RabbitMQ Spring Spring Boot SpringBoot Terraform View More Backend Engineer Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Hard Skills & Tools

ASP.NET CoreC#DapperSQL ServerPostgreSQLJSONautomated testingxUnitGitCI/CD

Soft Skills

collaborative developmentcode reviewcontinuous improvementagile frameworkstroubleshootingdesign patternscoding best practicesperformance optimizationevent handlingresilience