Full Stack Developer, Tester

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Ben Fatto

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📣 Marketing

☁️ SaaS

Consulting • Marketing • SaaS

Ben Fatto is a leading company in the development and customization of software, aiming to enhance productivity for businesses through software solutions. Specializing in the personalization and customization of Thomson Reuters applications in Latin America, Ben Fatto integrates these applications with various ERP systems like SAP and Oracle ERP. The company offers tailored development services, maintenance, and periodic migrations, ensuring robust support and adaptability for its solutions. With over 43 projects and more than 110 employees, the company has sustained a positive work environment and a high rating on Glassdoor, reflecting its commitment to respect and individual attention for both collaborators and clients.

📋 Description

• Design and build responsive, maintainable Angular applications and components, including state management, routing, and reusable component libraries • Consume and integrate REST APIs into the UI, handling loading states, error handling, and data validation • Build UI components that surface agentic AI features such as chat interfaces, recommendation panels, and agent monitoring dashboards • Collaborate with design/UX to translate requirements into polished, accessible interfaces • Design and develop .NET (C#) backend services and APIs using REST/gRPC best practices • Architect integration layers connecting Python-based agentic services with .NET applications via APIs, message queues, or SDKs • Apply SOLID, dependency injection, and clean architecture principles • Ensure secure, scalable, and maintainable integration patterns across application layers • Design, optimize, and maintain SQL Server databases for transactional and agentic workflow data • Write and tune stored procedures, queries, indexes, and ETL processes • Own data model design decisions with backend and API development • Build and maintain Playwright automated UI and end-to-end test suites • Write unit and integration tests for .NET services and APIs • Develop testing strategies for agentic systems, including prompt regression, output validation, behavior, edge-case, and adversarial testing • Participate in code reviews, CI/CD pipeline maintenance, and release quality gates • Integrate third-party or internally hosted AI/LLM APIs into applications • Write Python scripts/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 on scalable, cost-efficient, and secure cloud deployments

🎯 Requirements

• 7+ years of professional experience in .NET / C# development for APIs and backend services • 7+ years of experience with SQL Server, including database design, optimization, stored procedures, and performance tuning • 3+ years of hands-on Angular UI development, including component architecture, state management, and REST API consumption • Demonstrated full stack ownership across Angular, API design, .NET backend, SQL Server, and test automation • 2+ years of hands-on experience building or integrating agentic AI workflows/systems that orchestrate existing AI/LLM APIs • Experience with Playwright or similar for automated UI/end-to-end testing • Experience writing unit and integration tests for backend services • Practical experience with agentic AI frameworks such as LangChain, LangGraph, AutoGen, Semantic Kernel, or custom orchestration • Proficiency in Python for scripting and AI service integration • 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 consuming LLM APIs such as OpenAI, Anthropic Claude, Azure OpenAI, Bedrock, or Vertex AI • Experience with vector databases and RAG architectures • Knowledge of Docker/Kubernetes containerization • Experience with prompt engineering and agent evaluation/observability tools • Background in enterprise application modernization projects incorporating agentic AI capabilities