Rogelio Hernandez

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Senior Backend Engineer

Embodied, Inc.

Mar 2020 - Dec 2024 (4 years 10 months)

• Redesigned the AI learning interaction pipeline for Moxie robot using ASP.NET Core + SignalR, reducing round-trip latency by 60% and enhancing child speech recognition in real-time. • Led the migration of 5+ Java microservices to C#, refactoring backend orchestration logic into .NET Core, and introduced gRPC communication with embedded TensorRT inference engines. • Architected distributed Redis pub-sub infrastructure to handle real-time speech sessions and emotion state changes, integrating with Blazor Server UI dashboards. • Implemented CI/CD pipelines using GitHub Actions + Docker, decreasing deployment errors by 40% and improving recovery time. • Mentored 3 junior developers, leading weekly code reviews and architectural deep-dive

AI Infrastructure Engineer

Hugging Face

Feb 2019 - Jan 2020 (1 year)

• Built a hybrid C# + Python gRPC gateway for NLP transformer model access, integrating async pipelines and Redis caching for low-latency response. • Deployed models using Azure Functions and AWS Lambda, blending serverless scalability with model retraining logic. • Refactored async I/O into parallel execution logic, serving 25M+ API requests per day with consistent throughput. • Designed .NET-based orchestration services to manage Python worker pools.

Distributed Systems Engineer

37signals

Sep 2017 - Dec 2018 (1 year 4 months)

• Engineered a Kafka-based messaging system in ASP.NET Core and Redis Streams, scaling to 10M+ events/day. • Implemented templating logic for user alerts using XQuery-style JSON/XML parsers. • Designed WebSocket load balancing and message deduplication for fault-tolerant delivery.

Backend Engineer

Mozilla Foundation

Oct 2016 - Jun 2017 (9 months)

• Developed Spring Boot APIs enforcing privacy policies in Firefox. • Ported OAuth2.0 logic to C# modules with Redis-based token validation. • Maintained XML-based policy rendering using LINQ-to-XML and XDocument.

Software Engineering Intern

Atlassian

Jun 2015 - Aug 2015 (3 months)

• Built WPF dashboard using .NET for CI/CD metrics from Prometheus. • Reduced build failures by 25% by visualizing flaky build patterns. • Authored deployment pipeline guides for 15+ engineering teams.

Rogelio Hernandez

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