Principal Full Stack Engineer – .NET ecosystem

Ubiminds

Principal Full Stack Engineer developing scalable SaaS applications using .NET and Angular. Collaborating with international teams in a cloud-native environment for U.S.-based technology companies.

Posted 7/22/2026full-timeRemote • 🇧🇷 BrazilLeadWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and delivering scalable multi-tenant SaaS applications using .NET, Angular, and SQL Server/PostgreSQL, while applying advanced architectural patterns and AI-assisted development tools. Proven leadership in mentoring engineers and driving engineering best practices in quality, automation, and security.

Highest-signal resume keywords

C#.NETMulti-Tenant SaaS ApplicationsDomain-Driven Design (DDD)Automated Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NETEntity FrameworkAngularSQL ServerPostgreSQLDomain-Driven Design (DDD)CQRSSQL OptimizationData Modeling

Soft Skills

LeadershipMentoringCommunicationProblem-Solving

Tools & Technologies

GitHub CopilotCursorClaude CodeSonarQubeMendDatadogCloudWatch

Certifications & Qualifications

Bachelor's Degree in Computer ScienceEnglish Proficiency C1

Industry Keywords

SaaSDistributed SystemsREST APIsEvent-Driven ArchitectureCI/CD PipelinesAgile MethodologiesDevOps Practices

Tech Stack

Tools & technologies

AngularAWSDistributed SystemsElasticSearchEntity Framework.NETPostgresRedisRxJSSQL

About the role

Key responsibilities & impact

Design, develop, and deliver scalable multi-tenant SaaS applications using .NET, Angular, SQL Server/PostgreSQL, and AWS.
Own end-to-end delivery of features, from domain modeling and backend services through frontend implementation, automated testing, deployment, and production support.
Generate production-ready code using AI-assisted development tools such as GitHub Copilot, Cursor, Claude Code, and Replit-based workflows.
Collaborate with Architects to define application architecture and validate technical approaches through Proof of Concepts (PoCs).
Design systems using modern architectural patterns including Domain-Driven Design (DDD), CQRS, Event-Driven Architecture, Backend-for-Frontend (BFF), API Gateway.
Build modern Angular applications using standalone components, Signals, RxJS, Reactive Forms, and reusable UI architectures.
Design efficient database models and optimize SQL performance for high-volume SaaS applications.
Implement scalable integration, messaging, and distributed system patterns.
Troubleshoot complex production issues, perform root cause analysis, and continuously improve system reliability and performance.
Mentor engineers through architecture guidance, technical leadership, code reviews, and knowledge sharing.
Drive engineering best practices around quality, automation, security, observability, and AI-powered software development.

Requirements

What you’ll need

10+ years of professional software engineering experience.
Experience as a Principal Engineer, Lead Engineer, Software Architect, or equivalent technical leadership role.
Expert-level proficiency with C#, .NET, Entity Framework, Angular, SQL Server and/or PostgreSQL.
Strong experience designing and building Multi-tenant SaaS applications, Distributed systems, REST APIs, Event-driven architectures.
Deep expertise with Domain-Driven Design (DDD), CQRS, Secure and scalable application architecture.
Advanced knowledge of SQL optimization, data modeling, Redis, and OpenSearch/Elasticsearch.
Experience with automated testing, CI/CD pipelines, Git, Agile methodologies, and modern DevOps practices.
Experience with observability platforms and code quality tools such as SonarQube, Mend, Datadog, CloudWatch, or similar.
Hands-on experience using AI-powered development tools such as GitHub Copilot, Cursor, Claude Code, or similar coding assistants.
Strong leadership, mentoring, communication, and problem-solving skills.
Bachelor's degree in Computer Science, Engineering, or equivalent professional experience.
English proficiency at C1 level (written and verbal).

Benefits

Comp & perks

Full support from Ubiminds, including career guidance, HR, and administrative services.
Remote-first culture with outstanding opportunities for international career growth.