I ship AI apps, agents &
automations — fast.
I turn ideas and messy workflows into software that actually ships. LLM integrations, RAG systems, MVPs, and automations — delivered in days, not months.
Productized services, fixed scope
Clear deliverables, fixed prices when possible, daily updates. Tell me the outcome you want — I'll tell you how to get there.
AI feature integration
Add AI to your product: chatbots & agents, document Q&A (RAG), content generation, smart search.
MVP in a week
Turn your idea into a working, deployable web app you can demo, pitch, or take to market.
Workflow automation
Kill repetitive manual work with AI + automation: scraping, agents, pipelines, integrations.
Things I've shipped
Real projects — open source and client work (presented anonymized). Proof that the "fast" is backed by production-grade engineering.
Runspool — CLI workflow engine
A local-first workflow engine that turns scripts and checklists into resumable, observable, agent-friendly pipelines. SQLite state, retries, pause/resume, and JSON built for AI agents.
View on GitHub ↗ Case studyAI trend discovery & analysis platform
A full-stack platform with a custom multi-provider LLM gateway (caching + budget control), semantic clustering, a scoring engine, and automated reports. FastAPI · Next.js.
Read case study → Case studyEnd-to-end content automation pipeline
One video URL in, publish-ready bilingual subtitles, an article, and platform drafts out — hands-off. Playwright automation + ASR + multi-round LLM translation on a state machine.
Read case study →Senior engineering, AI-native speed
Years of real experience
Software engineering + project management. I scope it, build it, and own delivery end to end.
AI-native delivery
I direct AI coding agents like a dev team — so a build that took a five-person team several months can be rebuilt in weeks. AI amplifies the experience; it doesn't replace it.
Async & clear
Clean written updates and fast turnaround. I work async across time zones, so progress never waits on a call.
Common questions
What kind of projects do you take on?
Three productized services: AI feature integration (chatbots & agents, document Q&A / RAG, content generation, smart search) from $800; an MVP web app in about a week from $1,200; and workflow automation (scraping, agents, pipelines, integrations) from $600 per project. If your idea is close to one of these, it fits.
How can you deliver in days instead of months?
Senior engineering plus AI-native delivery: I direct AI coding agents like a dev team while owning architecture, code review, and delivery myself. Builds that took a five-person team several months can be rebuilt in weeks — AI amplifies the experience; it doesn't replace it.
How do we work together?
Fully async. You describe the outcome you want; I reply with a scoped plan and a fixed price where possible. During the build you get clear written updates — daily on active projects — so progress never waits on a call, whatever your time zone.
What is your tech stack?
Python, FastAPI, TypeScript, React, Next.js, and Node.js on the app side; OpenAI and Claude APIs, RAG, agents, and embeddings on the AI side; PostgreSQL and Cloudflare Workers for data and deployment.
How do I start a project?
Email ethan@ethansun.dev with the outcome you want — a rough idea is enough. You will get back a concrete scope, timeline, and price.
Let's build something
Have an idea or a process you want automated? Tell me the outcome — I'll get you there.