Oscar Cooper

Designed backend services for AI-powered communication and workflow products using Node.js and TypeScript with REST APIs. Built orchestration components for intelligent conversational workflows using LLM integration and asynchronous processing with structured API contracts. Developed Twilio/TwiML-aligned voice and messaging integrations, including intelligent call workflow logic (validation, event handling, routing decisions, and fallback behavior). Implemented SMS delivery and notification automation with reusable components handling delivery states, retries, and communication history. Improved reliability and error handling for high-volume Express services, reduced avoidable production failures (~25%), improved p95 response times (~20%) via profiling and caching, and investigated incidents involving timeouts and event delivery. Coordinated fixes with infrastructure/SRE partners and improved runbooks while contributing to architecture reviews, code reviews, and observability.

Built backend services for AI-powered communication and workflow products using Node.js and TypeScript, connecting app interfaces to model-serving infrastructure through REST APIs. Implemented orchestration for intelligent conversational workflows using LLM/AI integration and structured API contracts, including robust handling for unreliable or incomplete model output. Developed Twilio and TwiML integrations for voice and messaging events, including request validation, routing decisions, fallback behavior, SMS delivery workflows with retries and delivery state tracking, and event-driven processing to separate user requests from background tasks. Improved reliability and reduced avoidable production failures by ~25% via stronger Express.js validation/error handling, and reduced p95 latency by ~20% through profiling, query analysis, targeted caching, and better service design. Investigated production incidents (timeouts, dependency issues, inconsistent event delivery) and coordinated fix

Led a backend/application engineering squad delivering customer-facing communication and service workflows across product, operations, and infrastructure teams. Designed and implemented Node.js/TypeScript/Express REST APIs for customer interactions, notifications, and operational application features. Built Twilio/TwiML-based voice and messaging capabilities with configurable call flows, including call routing and call handling logic for availability, escalation, and failure recovery. Developed reusable SMS services with templates, delivery tracking, and retry handling, and contributed to voicemail/message-handling workflows for operational visibility. Designed interfaces for business phone number provisioning and configuration management. Improved API boundaries, reducing integration defects (~30%), and enhanced asynchronous event processing to reduce duplicates and make retries safer during downstream outages. Mentored engineers through design and incident follow-ups, coordinated pro