Senior Software Engineer (Back End)

mpathic is building infrastructure for trustworthy, safe, aligned, and emotionally intelligent AI systems. The company is seeking a Senior Software Engineer (Back End) to design, build, and scale backend systems, APIs, data infrastructure, and cloud-native applications using .NET, AWS, and related technologies while supporting AI model integration.

Responsibilities:

• Design, build, test, and maintain robust backend systems using .NET (C#) and other languages as appropriate
• Design, deploy, and manage scalable applications in AWS, leveraging services such as ECS Fargate, DynamoDB, S3, and other cloud-native technologies
• Build reliable APIs and services that support mpathic’s platform, products, and AI workflows
• Work with both SQL databases, including PostgreSQL, and NoSQL databases, including DynamoDB, to support diverse application and data needs
• Make thoughtful architectural decisions around reliability, scalability, performance, security, and maintainability
• Support the integration of AI models and AI-powered capabilities into production systems and workflows
• Partner closely with frontend engineers and occasionally contribute to React-based applications when needed
• Write clean, maintainable, well-tested, and well-documented code while contributing to engineering standards and best practices
• Provide technical guidance to other engineers and actively participate in code reviews, architecture discussions, and knowledge sharing
• Tackle complex engineering challenges spanning performance optimization, system design, troubleshooting, integrations, and evolving product requirements
• Stay current on emerging tools and techniques for cloud infrastructure, services, APIs, and AI applications. Conduct focused proofs of concept with clear technical and business outcomes
• Work closely with engineering, product, AI, and other teams to translate business and customer needs into scalable technical solutions

Requirements:

• 5+ years of software engineering experience, with a strong focus on backend development using .NET (C#)
• Hands-on experience with AWS services, architecture, and best practices for building and operating cloud-native applications
• Strong experience with SQL and NoSQL databases, including schema design, data modeling, query optimization, and performance
• Experience designing scalable, reliable backend services, APIs, and distributed systems
• Working knowledge of React and its ecosystem, with the ability to collaborate effectively across the stack
• Comfortable taking ambiguous technical problems from initial requirements through design, implementation, testing, and deployment
• Strong communicator who enjoys working across engineering, product, and other technical teams
• Curious about emerging technologies and motivated to evaluate new tools and approaches pragmatically