Senior .NET AI Engineer

Job Description: Senior .NET AI Engineer

Location: Brazil (Remote)

Experience: 8+ Years

Required Qualifications

• 8+ years of professional software development experience, with strong C#, .NET, ASP.NET Core, REST API, and automated testing skills.

• Practical experience building applications with LLM APIs, prompt and context design, structured outputs, tool calling, embeddings, or RAG.

• Production AWS experience with containerized or serverless applications, identity and access, secrets, messaging, object storage, and monitoring.

• Experience with asynchronous or distributed systems, including idempotency, retries, failure handling, and performance troubleshooting.

• Experience creating AI evaluations or automated quality checks for safety, prompt Injection, regression, latency, and cost.

• Ability to apply secure coding, sensitive-data handling, least privilege, and auditability practices.

• Strong Git, pull-request, code-review, CI/CD, and Agile delivery practices.

Preferred Qualifications

• Microsoft Foundry experience, especially integration with AWS-hosted applications. Equivalent production LLM platform experience is transferable.

• Mortgage, lending, servicing, financial services, or document-processing experience.

• Experience with Model Context Protocol (MCP), agent runtimes, workflow orchestration, capability-based authorization, or configuration-driven agent catalogs.

• Experience with OpenSearch, Textract or comparable extraction tools, content moderation, redaction, or data provenance.

ABOUT SONATA SOFTWARE

Sonata Software is an AI-first modernization engineering company that helps enterprises transform legacy systems into intelligent, scalable business platforms. Powered by its Platformation™ framework and Harmoni.AI platform, Sonata delivers AI-led modernization across cloud, data, AI, Dynamics, test automation, and managed services. Headquartered in Bengaluru, India, Sonata has more than $1.2 billion in revenue and 6,400+ AI engineers supporting global delivery across regions including the US, UK, India, Malaysia, Mexico, Australia, DACH, and the Nordics. With deep partnerships across Microsoft, AWS, Salesforce, and Snowflake, Sonata helps Fortune 500 enterprises accelerate innovation, improve efficiency, and drive sustainable growth.

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Sonata Software is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity, age, religion, disability, sexual orientation, veteran status, marital status, or any other characteristics protected by law