Roberto Alarcon

Senior Software Engineer

San Diego, California | linkedin.com/in/robalarcon/

Performance-obsessed Senior Software Engineer with 17+ years in C#/.NET, distributed systems, and event-driven architecture. Proven track record resolving critical production incidents, mitigating database storms, and optimizing high-throughput Kafka and PostgreSQL pipelines. Full-stack across .NET Core, Angular, React, and Azure — now integrating AI capabilities via OpenAI SDK and Claude Code.

Technical Skills

Backend: .NET Core, C#, PostgreSQL, NATS, Kafka, Go, Redis, Python, SQL Server, Nodejs
Frontend: Angular, React, TypeScript, JavaScript, Tailwind
AI/ML: OpenAI SDK, Claude Code, PyTorch, scikit-learn
Infrastructure: Kubernetes, Docker, Azure, Linux, Functions, Windows Server

Work Experience

Calsense

Senior Software Engineer | 2023 - Present

Acted as sole engineer managing an IoT backend supporting hundreds of thousands of concurrent devices; scaled system uptime from 80% to 99%.
Resolved critical database storms and bottlenecked relational storage by introducing NATS to queue and throttle heavy incoming request volumes.
Identified and resolved thread starvation bugs by implementing native .NET synchronization primitives (SemaphoreSlim) to protect shared database connection pools.
Integrated the OpenAI SDK to implement automated intelligent reporting features, translating complex system analytics into natural language insights for users.
Spearheaded a 9-week zero-downtime migration of a legacy on-premise database to Azure PostgreSQL, strictly maintaining interface contracts for legacy client applications.
Cut average UI load times by 50% for high-volume enterprise clients by redesigning data structures, batching queries, rewriting raw SQL, and tuning indexes.
Engineered an internal pub/sub messaging architecture utilizing a partitioned Kafka cluster to balance message throughput and increase processing efficiency.
Deliver software across the entire stack, utilizing C for embedded IoT logic, .NET Core/Python for backend services, and Angular/React for front-end portals.

Skills: C#, Python, JavaScript, Postgresql, Kafka, Pandas, PyTorch, OpenAISDK

Lytx, INC

Software Engineer III | 2023

Led the design of a new version of the public API for customers to access their data.
Added features to existing portals for customers.
Fixed performance bugs in an existing application.

Skills: C#, Kafka, Redis, SQL Server, JavaScript, MongoDB

Becton Dickinson / Carefusion

Senior Software Engineer | 2015 - 2022

Led a full-scale architectural refactor of a legacy Windows application into a native Android application for specialized medical scanning hardware.
Built end-to-end REST APIs and microservices infrastructure utilizing Docker, Kubernetes, and Kafka pipelines to support cross-functional data consumption.
Enhanced various web applications using React, Vue, and legacy JavaScript frameworks (Knockout.js, Backbone.js).

Skills: Java, Python, C#, .NET Core, Flask, Postgresql, RabbitMQ, Pytorch

InnovoCommerce, LLC

Software Engineer II | 2013 - 2015

Led the front-end team to design, build, and deploy enterprise clinical trial applications for major pharmaceutical clients.

Skills: Knockout.js, JavaScript, C#, Neo4J, Apache Cordova, SQL Server, CSS

Clustter

Co-Founder, Lead Front-End Engineer | 2010 - 2015

Co-founded a real-time web startup handling team communication, messaging, and task management for 50+ enterprise customers.

Skills: Python, JavaScript, BackboneJS, Pylons, Postgresql, SqlAlchemy.