Senior Dotnet Developer

ABOUT SONATA SOFTWARE

Sonata Software, with over $1.2 Billion Revenue, is a leading AI-first Modernization Engineering company, powered by our unique PlatformationTM framework. Our 6400+ AI Engineers are helping enterprises transform from systems to intelligent business platforms leveraging partner ecosystem to drive speed, efficiency, and growth. Our bouquet of Modernization Engineering Services with AI -first approach cuts across Cloud, Data, AI, Dynamics, Test Automation, and Managed Services.

Sonata’s AI-led modernization is enabled by a powerful suite of proprietary tools and assets. At the core is the Harmoni.AI Enterprise Platform, which includes AgentBridge-a governance and observability framework; AgentBuilder-a development toolkit for fungible agents integrated into enterprise systems; and the Agent Marketplace-an internal ecosystem for modular, reusable agents.

Headquartered in Bengaluru, India, Sonata Software has a strong global presence, including key regions US, UK, India, Malaysia, Mexico, Australia, DACH (Germany/Switzerland) & Nordics (Finland). We are a trusted partner of Fortune 500 companies in Banking, Financial Services and Insurance; Healthcare and Lifesciences; Telecom, Media, and Technology; and Retail, Manufacturing and Distribution space.

Deep collaborations with partners like Microsoft, AWS, Salesforce, and Snowflake strengthen our ability to deliver cutting-edge AI solutions. Our 30+years of partnership with Microsoft, and being part of the elite Microsoft Inner Circle, places us among the top 1% of global Microsoft partners. Sonata is now among the first companies to earn the Microsoft Frontier Partner Badge Also; Sonata Software is proud to achieve AWS Premier Tier Status in the AWS Partner Network.

Job Description: Senior .NET AI Engineer

Location: Brazil (Remote)

Ideal Experience

• 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.

Why join Sonata Software?

At Sonata, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build never seen before solutions to some of the world’s toughest problems. You´ll be challenged, but you will not be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

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.

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