Lead Fullstack Engineer

Resilientco

Argentina Remote contract

Posted: April 15, 2026

Required Skills

Job Description

We are seeking a Lead Fullstack Engineer to lead development of scalable, AI-enabled full stack solutions. This role is critical for designing and delivering microservices-based backends, modern frontends, and multi-agent AI systems that drive autonomous workflows and enterprise copilots.

You will work across C# /.NET and Python stacks, implement Azure cloud solutions, and guide cross-functional teams to build production-grade systems using containerization, event-driven architectures, and retrieval-augmented AI pipelines. This is an opportunity to shape architecture, mentor engineers, and deliver high-impact AI/ML products.

Responsibilities:
• Design and implement backend services using ASP.NET Core, Entity Framework, SignalR, and Minimal APIs.

• Develop Python services and AI components with FastAPI, Django, Flask, Pandas, NumPy, and Scikit-learn.

• Build and maintain microservices packaged with Docker and orchestrated via event-driven patterns using Azure Service Bus or RabbitMQ.

• Design and implement multi-agent AI systems using LangChain, AutoGen, and CrewAI frameworks.

• Build RAG pipelines with vector databases such as Pinecone or Weaviate and optimize prompt engineering and LLM fine-tuning.

• Implement agent orchestration and inter-agent communication protocols for autonomous task execution.

• Design and deploy enterprise AI copilots using Microsoft Copilot Foundry and integrate with Azure OpenAI Service.

• Implement serverless and workflow solutions with Azure Functions and Azure Logic Apps.

• Build CI/CD pipelines and infrastructure as code using Azure DevOps, ARM/Bicep, or Terraform.

• Collaborate with data scientists, product managers, and stakeholders to translate business requirements into technical solutions.

• Mentor junior developers, document architecture decisions, and promote scalable, maintainable designs.

Requirements:
• Proven experience as a technical lead or senior full stack engineer; typically 5+ years in software development and leadership.

• Strong expertise in C# /.NET: ASP.NET Core, Entity Framework, SignalR, and Minimal APIs.

• Strong experience in Python with FastAPI, Django, Flask, Pandas, NumPy, and Scikit-learn.

• Experience designing microservices and containerizing applications with Docker.

• Experience with event-driven architectures and message queues such as Azure Service Bus or RabbitMQ.

• Hands-on experience building RAG pipelines and working with vector databases (Pinecone, Weaviate).

• Practical experience with LLM integration and Azure OpenAI Service.

• Experience with Azure services: Azure Functions, Azure Logic Apps, Azure Cognitive Services, and Azure DevOps.

• Experience with CI/CD automation, YAML pipelines, and Infrastructure as Code using ARM/Bicep or Terraform.

• Strong problem-solving, documentation, and communication skills; ability to translate complex AI concepts to business stakeholders.

• Proven ability to mentor developers and work effectively in cross-functional teams.

• Commitment to code quality, testing, and iterative MVP-driven delivery.

Nice to have:
• Experience designing enterprise-grade copilots with Microsoft Copilot Foundry.

• Familiarity with agent orchestration frameworks and inter-agent coordination patterns.

• Experience with Azure Data Factory for ETL/ELT pipelines.

• Experience managing observability with Application Insights.

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