I'm David Billiot, founder of RESILIENCE Agentic Solutions. I build full-stack applications, backend systems, and AI automation, with experience in cloud infrastructure, security reviews, and smart-contract development. I value reliable software, thoughtful interfaces, and contributing useful work to open source.
Based in Tampa and Abu Dhabi, working with clients worldwide.
- Software and SaaS: Subscription products and custom software, from the interface through the API, with tests and CI included.
- Backend systems: Internal tools, APIs, and integrations, including Supabase and PostgreSQL, and review of systems already in production.
- Payments: Stripe Billing and Stripe Apps.
- Web and mobile apps: Product sites and customer apps on Next.js, React, and Tailwind, including accessibility checks.
- AI agents and automation: Agents for support, bookings, and other repeated operational work.
- Cloud infrastructure: Vercel, Cloudflare Workers, and Docker.
- GPU: Python and Go work on GPU data processing and Kubernetes GPU operators.
- Security reviews: Reviews of sites, software, and agents already live. Testing starts only after the scope is signed.
- Interfaces: Spacing, wording, color, and layout, including scroll behavior, blur, and layout shift.
- Personal data removal: People-search listings taken down, with a written record of where a name was found.
- Blockchain: experience with smart-contract development and Ethereum and Solana tooling.
| Area | Technologies |
|---|---|
| Languages |  TypeScript ·  JavaScript ·  Python ·  Go ·  Rust SQL / PL/pgSQL ·  Bash ·  CSS |
| Frontend |  Next.js (App Router) ·  React ·  Tailwind CSS Radix UI / shadcn · Motion · StyleX · Lexical · TipTap |
| Backend & data |  Supabase (Postgres, Auth, RLS) · PostgreSQL Drizzle ORM ·  Zod ·  Upstash Redis · REST APIs |
| Cloud & infrastructure |  Vercel ·  Cloudflare Workers (Queues, Cron, Wrangler) Docker ·  Kubernetes GPU operators |
| Payments & email |  Stripe Billing · Stripe Apps ·  Resend · React EmailWeb Push |
| AI & agents | Multi-agent systems ·  Model Context Protocol (MCP) NVIDIA NeMo Agent Toolkit ·  Claude Code Action |
| Testing & quality | Playwright · axe accessibility ·  Vitest Testing Library ·  Jest ·  ESLint ·  Prettier |
| DevOps & observability |  GitHub Actions ·  Dependabot ·  Sentry ·  PostHog pnpm workspaces |
| Security | App security reviews · secret redaction · auth hardening Cloudflare Turnstile |
Full track record: we-are-resilience.com/open-source
| Organization | Project | Pull requests |
|---|---|---|
| NVIDIA | cudf | #24992 |
| NVIDIA | gpu-operator | #3076 |
| NVIDIA | NeMo-Agent-Toolkit | #2392 · #2426 · #2428 (case study) · #2519 (case study) |
| Anthropic | buffa | #713 (case study) |
| Anthropic | claude-code-action | #1702 · #1704 |
Show all merged contributions
| Organization | Project | Pull requests |
|---|---|---|
| agent-of-empires | agent-of-empires | #4477 (case study) · #4772 |
| AWS Labs | ferret-scan | #760 (case study) |
| Meta | astryx | #7528 (case study) · #9551 |
| Meta | lexical | #9396 |
| Microsoft | TypeChat | #458 |
| Paradigm | reth | #27899 (case study) |
| Organization | Project | Pull requests |
|---|---|---|
| NVIDIA | cudf | #24990 |
| Anthropic | claude-code-action | #1902 |
Show all open pull requests
| Organization | Project | Pull requests |
|---|---|---|
| ChainSafe | lodestar | #10383 |
| Meta | stylex | #1950 |
| Microsoft | mcp | #3936 |
Client work lives in private repositories.