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Full Stack Engineer with 13+ years building production-grade web applications, REST and GraphQL APIs, microservices, and cloud-native backend systems. Strong focus on scalable architectures, reliability, and performance optimization across frontend and backend. Experienced integrating AI/LLM capabilities (RAG pipelines, LangChain/LangGraph, vector databases) into full stack products, leading platform services at Meta and delivering HIPAA-compliant healthcare software. Trusted technical leader who ships end-to-end features and mentors engineers to senior-level ownership.…Full Stack Engineer with 13+ years building production-grade web applications, REST and GraphQL APIs, microservices, and cloud-native backend systems. Strong focus on scalable architectures, reliability, and performance optimization across frontend and backend. Experienced integrating AI/LLM capabilities (RAG pipelines, LangChain/LangGraph, vector databases) into full stack products, leading platform services at Meta and delivering HIPAA-compliant healthcare software. Trusted technical leader who ships end-to-end features and mentors engineers to senior-level ownership.

Timothy Lomuscio

Full Stack Developer, Back-End Developer, Web Developer, +2

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Full Stack Engineer with 13+ years building production-grade web applications, REST and GraphQL APIs, microservices, and cloud-native backend systems. Strong focus on scalable architectures, reliability, and performance optimization across frontend and backend. Experienced integrating AI/LLM capabilities (RAG pipelines, LangChain/LangGraph, vector databases) into full stack products, leading platform services at Meta and delivering HIPAA-compliant healthcare software. Trusted technical leader who ships end-to-end features and mentors engineers to senior-level ownership.…Full Stack Engineer with 13+ years building production-grade web applications, REST and GraphQL APIs, microservices, and cloud-native backend systems. Strong focus on scalable architectures, reliability, and performance optimization across frontend and backend. Experienced integrating AI/LLM capabilities (RAG pipelines, LangChain/LangGraph, vector databases) into full stack products, leading platform services at Meta and delivering HIPAA-compliant healthcare software. Trusted technical leader who ships end-to-end features and mentors engineers to senior-level ownership.

Available to hire

Full Stack Engineer with 13+ years building production-grade web applications, REST and GraphQL APIs, microservices, and cloud-native backend systems. Strong focus on scalable architectures, reliability, and performance optimization across frontend and backend.

Experienced integrating AI/LLM capabilities (RAG pipelines, LangChain/LangGraph, vector databases) into full stack products, leading platform services at Meta and delivering HIPAA-compliant healthcare software. Trusted technical leader who ships end-to-end features and mentors engineers to senior-level ownership.

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Work Experience

Senior Full Stack Engineer at Meta

June 1, 2023 - Present

Architected and owned full stack platform services in TypeScript/Node.js and React, processing over 2B events/day. Improved uptime to 99.98%, reduced API latency by 35% through PostgreSQL optimization, Redis caching, and service-layer refactoring. Built React dashboards for developer productivity analytics and DORA metrics, created GraphQL federation and gRPC integration for downstream services, and implemented a distributed feature flag system with gradual rollouts and full observability. Led AI/LLM integrations including RAG documentation search using LangChain and pgvector. Built event-driven notifications using AWS SQS/SNS and improved observability with OpenTelemetry and Datadog, including zero-downtime database migrations and frontend Core Web Vitals improvements. Owned on-call operations, resolved incidents, authored runbooks/postmortems, and mentored engineers.

Senior Full Stack Engineer at Thirty Madison

April 1, 2019 - May 1, 2023

Built and scaled a HIPAA-compliant telehealth platform from 50,000 to 500,000+ active patients using React, TypeScript, and Node.js microservices. Delivered accessible patient workflows and reusable component libraries. Designed HIPAA-compliant REST APIs with RBAC, JWT authentication, audit logging, and field-level encryption. Optimized PostgreSQL for high-traffic paths to reduce p95 latency by 40%. Architected asynchronous prescription routing/notifications with AWS SQS and React UI, improving delivery reliability. Integrated personalization and patient engagement automation, supported feature flags and A/B testing for 20+ concurrent experiments, and expanded automated regression testing with Jest and Cypress to reduce production defects. Mentored engineers on HIPAA-aware development practices.

Full Stack Engineer at Dell Technologies

March 1, 2016 - March 1, 2019

Architected distributed backend services and React-based internal tools in Node.js/TypeScript for supply chain, logistics, and product catalog operations, improving pipeline reliability and SLA adherence across multiple business units. Built self-service internal tooling used by 500+ engineers, reducing support tickets. Pioneered CI/CD standards and blue/green deployments, cutting release cycle time from 3 weeks to 5 days. Increased test coverage through refactoring and integration testing, reducing incident rates. Standardized Docker-based dev environments to reduce onboarding time and eliminate environment inconsistency, and contributed shared React component libraries across product teams.

Full Stack Developer at Arbisoft

August 1, 2013 - February 1, 2016

Designed and shipped multiple full stack production applications across EdTech, healthcare, and travel using Python/Django backends and React/JavaScript frontends. Built REST API backends and improved data retrieval performance using PostgreSQL query optimization and Redis caching. Developed a HIPAA-aware appointment scheduling module with secure patient data handling, RBAC, and audit logging. Created reusable React component architectures and shared API client libraries to reduce duplication and speed up feature development.