Senior Software Engineer – .NET

Senior Software Engineer developing and maintaining e-commerce backend services with a focus on performance and scalability for Grupo Casas Bahia.

Posted 6/5/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tools & technologies

ASP.NETDockerKafkaKubernetesMongoDB.NETRedisSQL

Key responsibilities & impact

Develop and evolve microservices for the e-commerce platform (checkout, offers, payments, shipping) with a focus on high throughput and predictable latency.
Maintain and modernize legacy systems (.NET Framework / WCF) with a progressive migration approach.
Work on bug fixes, improvements and new projects from a prioritized backlog, ensuring zero impact on the purchase flow.
Follow the full lifecycle: analysis → implementation → testing → deploy → observability in production.
Participate in code reviews with an enterprise-quality mindset (SonarQube, Clean Code, SOLID).
Ensure resilience and scalability in high-demand scenarios (Black Friday, promotional campaigns).

What you’ll need

Experience developing in C# and .NET 8+ (knowledge of .NET 10 is desirable).
Experience building RESTful APIs using ASP.NET Core Web API.
Knowledge of software architecture using Clean Architecture and DDD (Domain-Driven Design) with tactical patterns.
Experience with relational databases (SQL Server), including modeling, writing queries, stored procedures and using Dapper.
Knowledge of document database MongoDB.
Experience implementing and using Redis cache.
Experience with messaging using Kafka, including developing idempotent consumers and producers.
Experience with automated testing using xUnit, mocks (NSubstitute or similar) and integration tests.
Knowledge of data validation using FluentValidation.
Experience implementing resilience strategies using Polly (retry, circuit breaker and timeout).
Knowledge of code quality practices with SonarQube, aiming for zero warnings and cyclomatic complexity ≤ 15.
Experience with source control using Git, including Conventional Commits and branching strategies.
Basic knowledge of infrastructure with Docker and Kubernetes, including understanding of pods, health checks and deployments.

Comp & perks

Profit-sharing / Bonus: Additional recognition to reward your effort and dedication.
Health and Dental Insurance: Support for you and your family's health and well-being.
Meal Allowance: To ensure quality meals during your workday.
Life Insurance: Financial protection for you and your dependents.
Extended Maternity Leave: 180 days for new mothers to enjoy time with their baby.
Extended Paternity Leave: 20 days so parents can be present in the early days.
Fitness Incentives: Access to Wellhub (Gympass) and TotalPass to support physical activity and well-being.
Commuter Allowance: To help make your daily commute easier.
SESC Partnership: Benefits in culture, leisure, health and more.
Discount Club: Savings of up to 70% on products and services with over 2,000 partners across Brazil and Latin America.
Birthday Day-Off: Enjoy a day off on your birthday to celebrate.
Pharmacy Discounts: Exclusive discounts on medications to help reduce healthcare costs.

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Hard Skills & Tools

C#.NET 8ASP.NET Core Web APIClean ArchitectureDomain-Driven DesignSQL ServerMongoDBRedisKafkaxUnit

Soft Skills

code reviewsenterprise-quality mindsetresiliencescalabilitybug fixesimprovementsprioritized backlogobservabilitycollaborationcommunication