Ubiminds

Senior Backend Developer – .NET

Ubiminds

full-time

Posted on:

Location Type: Remote

Location: Brazil

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Job Level

Senior

Tech Stack

Entity Framework.NETSQL

About the role

  • Break down large or complex problems into smaller components, design clean solutions, and implement the core framework.
  • Build and maintain RESTful APIs and backend services using C#, .NET Core, Entity Framework, and Web API.
  • Apply software architecture patterns such as Domain-Driven Design (DDD) and CQRS to create modular, scalable systems.
  • Work directly with SQL Server—design databases, write stored procedures, optimize queries, and tune performance.
  • Use Entity Framework (EF Core or EF6) for ORM and data access.
  • Write clean, testable, and maintainable code with clear documentation.
  • Take full ownership of testing your code—unit, integration, and performance tests—as part of a Shift-Left / No-QA team setup.
  • Collaborate with product managers and cross-functional teams to understand requirements and deliver customer-focused features.
  • Use AI development tools (required), such as GitHub Copilot, Claude, or similar, to assist with code generation, refactoring, documentation, and to increase development speed.

Requirements

  • 5+ years of experience in enterprise or SaaS software development.
  • Strong hands-on experience with:
  • - C#, .NET Core, Web API
  • - Entity Framework (EF Core or EF6)
  • - SQL Server — writing queries, stored procedures, indexing, and performance tuning
  • Solid understanding of object-oriented programming, design patterns, and enterprise architecture.
  • Experience with DDD, CQRS, and clean separation between business logic and data access.
  • Familiarity with multithreading, asynchronous programming, and system performance tuning.
  • Comfortable with Git and working in a modern development environment (CI/CD, Agile).
  • Strong debugging and troubleshooting skills.
  • Excellent written and verbal communication skills in English.
  • Experience collaborating across multiple teams or squads.
  • Required: Active daily use of AI development tools like GitHub Copilot, Claude, or similar in your workflow.
Benefits
  • Placement at a product-based company with the same treatment as full-time employees.
  • Full back-office support, from career guidance to HR and concierge services.
  • Remote-first policy — we are a distributed team.
  • Company-provided MacBook (no "bring your own device").
  • Access to professional growth opportunities with other technology professionals through tech talks, chapter meetings, and remote social events.
  • Free English lessons with a native speaker to improve communication skills.
  • Candidate referral bonus (refer friends to Ubiminds and get rewarded).
  • Optional use of our Florianópolis headquarters with weekly quick massages, snacks, soft drinks, and games.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
C#.NET CoreEntity FrameworkWeb APISQL ServerDomain-Driven DesignCQRSobject-oriented programmingmultithreadingasynchronous programming
Soft Skills
debuggingtroubleshootingcommunicationcollaborationproblem-solvingownershipdocumentationcustomer-focusedteamworkadaptability