Justin Duplain

About

I’ve been building for the web for over ten years, starting with hands-on design and development, then enterprise engineering at Oracle, and most recently AI-powered products. My latest project was designing the automation layer for a compliance platform where AI agents handle multi-step data entry workflows end-to-end, with every action auditable and every decision reviewable by a human.

I spent three years at Oracle Cloud Infrastructure as a Senior Engineer, building the interfaces for Private Cloud and Edge Cloud products used by government and defense agencies. I led a major console migration, built shared component libraries used across a dozen teams, and worked on the infrastructure behind NASA’s Deep Space Network and the James Webb Space Telescope.

I’m a U.S. Marine Corps veteran. That background shows up in how I work: structured, adaptable, and focused on getting the job done, whether that means shipping disaster recovery tooling or building AI workflows for a regulated industry.

10+ years building for the web. Currently focused on AI systems that are useful, auditable, and built for high-stakes environments.

Technical Skills

AI & Agentic Systems: Autonomous agent frameworks, state machine orchestration, LLM tool use / function calling, least-privilege tool injection, context isolation, Vercel AI SDK, OpenAI / Anthropic APIs, LlamaIndex, ChromaDB, Supabase PGMQ
Python & Full-Stack: FastAPI, asyncio, BM25 / RRF hybrid retrieval, REST API design, React 19, TypeScript, Svelte 5 (Runes), JavaScript (ES6+), Node.js, Vite, Tailwind CSS, USWDS, Style Dictionary
Infrastructure & DevSecOps: Docker, AWS EC2, GitLab CI / GitHub Actions, Kubernetes, nginx, Terraform, compliance-gated deployments, OCI GovCloud, secrets management
Testing & Accessibility: Vitest, Vitest-Axe, Jest, Cypress, Section 508 / WCAG 2.1

Resume

Full-Stack AI Engineer | U.S. Marine Corps Veteran

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Summary

Senior Full-Stack AI Engineer: 10+ years building production web systems, including 3+ years as a Senior Engineer at Oracle OCI, Fortune 100 cloud provider delivering mission-critical government and defense cloud infrastructure.

Agentic AI Systems: Designed and built AI workflow layer for a B2B SaaS compliance platform. State machine orchestration, least-privilege tool injection, and context-isolation layer managing handoffs between two AI surfaces. Significantly reduced manual compliance data entry with full human-in-the-loop auditability.

Full-Stack Delivery: FastAPI/Python backends through TypeScript frontends. LlamaIndex orchestration, hybrid BM25 + vector RAG pipelines, Supabase/PGMQ async queues, deployed within enterprise DevSecOps pipelines serving U.S. Government and defense agencies.

Professional Experience

Lead Engineer, AI Workflow & Infrastructure

01/2026 - 03/2026

Confidential Client, Sarasota, FL (contract - remote)

AI-native SaaS startup · Enterprise compliance automation platform · Agentic workflow orchestration

Designed and built an agentic automation layer coordinating LLM tool calls and real-time database state paired with document analysis to automate multi-step compliance data entry workflows end-to-end.
Engineered a workflow state controller that externalizes business logic entirely from the LLM prompt. Database sessions resume exactly where they left off, supporting model swapping without affecting progression logic.
Implemented dynamic tool injection granting agents only the capabilities appropriate to the current workflow phase, reducing attack surface and cutting token overhead.
Built a context-isolation layer managing handoffs between a floating chat overlay and an embedded form agent, tracking entity-to-session ownership and warning users on navigation mismatch.

Senior Software Engineer, IC3 · OCI Private Cloud

9/2024 - 9/2025

Oracle · Fortune 100 Global Cloud Provider, Sarasota, FL (remote)

Oracle Cloud Infrastructure (OCI): Private and Edge Cloud solutions for regulated, government, and defense agencies.

Led a config-driven TypeScript migration of the PCA management console. Handled UI layout, field validation, and API bindings declared as typed configuration objects rather than hand-coded per screen, reducing integration effort by ~20% and enabling new screens to be assembled from existing building blocks.
Standardized feature-gating across 20+ backend endpoints so the console dynamically adapts to the appliance’s type and firmware version. This prevents operators from encountering unsupported functionality on infrastructure where a misconfigured operation could affect hundreds of running VMs.
Built shared React/TypeScript components consumed across 12+ micro-frontends. Enforced consistent interaction patterns, accessibility defaults, and visual behavior across a distributed engineering organization. PCA powers NASA’s Deep Space Network, James Webb Space Telescope operations, and Mars rover communications.
Delivered Disaster Recovery and Replication workflows, failover capabilities that operators rely on to protect their most critical infrastructure.

Software Engineer, IC2 · OCI Edge Cloud

8/2022 - 9/2024

Oracle, Sarasota, FL (remote)

Defined frontend architecture standards including component patterns, data-fetching conventions, and documentation. Implemented WCAG / Section 508 compliance across customer-facing interfaces.
Built internal tooling to automate infrastructure-related workflows previously handled manually across teams, improving engineering velocity and standardizing previously inconsistent processes.

Web & Digital Manager

12/2019 - 02/2022

State College of Florida, Bradenton, FL

Managed all SCF web properties, including end-to-end delivery of the digital launch of the $3.6M 26 West Technology and Entrepreneurship Center, vendor RFPs, and coordinating with 100+ stakeholders.
Improved student enrollment and retention outcomes by refining UX flows and site hierarchy during COVID-era remote learning shifts.

Technical Consultant

01/2015 - 12/2019

Various Clients, Sarasota, FL

Designed and maintained web presences for small business clients across 5 years—WordPress, PHP, and hosting architecture. Acted as sole technical resource on each engagement from scoping through delivery.

Education & Certifications

Certificate, Full-Stack JavaScript Development (Agile / TDD)

Fullstack Academy

MA, Digital Communication & Design

University of South Florida

BA, Graphic & Web Design

University of South Florida

Military Service

Force Deployment Analyst

U.S. Marine Corps Forces Central Command, MacDill AFB, Tampa, FL

Prior TS/SCI Clearance

Managed deployment logistics data for 400,000+ personnel in high-stakes operational environments requiring strict data integrity and operational security.