Full Stack Developer, Tester

This is a fully remote position, open to applicants in Brazil.

📋 Description

• Design and develop responsive, maintainable Angular applications and components, which include state management, routing, and reusable component libraries.

• Integrate and consume REST APIs within the UI, managing loading states, handling errors, and validating data.

• Create UI components that showcase agentic AI features like chat interfaces, recommendation panels, and agent monitoring dashboards.

• Collaborate with design and UX teams to transform requirements into polished and accessible interfaces.

• Develop .NET (C#) backend services and APIs following REST/gRPC best practices.

• Design integration layers that connect Python-based agentic services with .NET applications through APIs, message queues, or SDKs.

• Implement SOLID principles, dependency injection, and clean architecture methodologies.

• Ensure secure, scalable, and maintainable integration patterns throughout application layers.

• Design, optimize, and maintain SQL Server databases for both transactional and agentic workflow data.

• Write and optimize stored procedures, queries, indexes, and ETL processes.

• Take ownership of data model design decisions in conjunction with backend and API development.

• Create and manage Playwright automated UI and end-to-end test suites.

• Develop unit and integration tests for .NET services and APIs.

• Formulate testing strategies for agentic systems, which include prompt regression, output validation, behavior, edge-case, and adversarial testing.

• Engage in code reviews, maintain CI/CD pipelines, and uphold release quality standards.

• Integrate third-party or internally hosted AI/LLM APIs into applications.

• Write Python scripts and services for agent orchestration and connect them to the .NET/Angular stack.

• Deploy, monitor, and manage application services and infrastructure on AWS and/or GCP.

• Collaborate with DevOps to ensure scalable, cost-efficient, and secure cloud deployments.

⛳️ Requirements

• Over 7 years of professional experience in .NET / C# development focused on APIs and backend services.

• More than 7 years of experience with SQL Server, including database design, optimization, stored procedures, and performance tuning.

• At least 3 years of practical Angular UI development experience, covering component architecture, state management, and REST API consumption.

• Proven full stack ownership across Angular, API design, .NET backend, SQL Server, and test automation.

• Over 2 years of hands-on experience in building or integrating agentic AI workflows/systems that utilize existing AI/LLM APIs.

• Familiarity with Playwright or similar tools for automated UI and end-to-end testing.

• Experience in writing unit and integration tests for backend services.

• Practical experience with agentic AI frameworks, such as LangChain, LangGraph, AutoGen, Semantic Kernel, or custom orchestration.

• Proficient in Python for scripting and integrating AI services.

• Hands-on experience with AWS and/or GCP for deploying and managing application workloads.

• Strong understanding of REST API design and service-to-service integration patterns.

• Experience in consuming LLM APIs such as OpenAI, Anthropic Claude, Azure OpenAI, Bedrock, or Vertex AI.

• Familiarity with vector databases and RAG architectures.

• Knowledge of Docker and Kubernetes containerization.

• Experience with prompt engineering and tools for agent evaluation/observability.

• Background in enterprise application modernization projects that incorporate agentic AI capabilities.

🏝️ Benefits

• Competitive salary and performance-based bonuses.

• Comprehensive health, dental, and vision insurance.

• Flexible working hours and remote work opportunities.

• Professional development and continuous learning opportunities.

• A supportive and collaborative work environment.