21 days
Built a healthcare MVP for a US startup
Compressed scope to 4 must-have flows, weekly delivery, HIPAA-aware architecture from day one.
For US Founders & SMBs
Build your SaaS MVP in 4 weeks.
AI-powered software development for US founders and SMBs. Startup-speed execution, founder-led communication, US-timezone overlap.
- Mutual NDA on day one
- Weekly demos, never a black box
- Hand-offs in 24h if you offboard us
Recent Results
We ship work that moves a metric, not just a deliverable.
40%
Reduced manual support workload
Shipped a GPT-4o + RAG chatbot for a 20-person SMB in 4 weeks. Cut median response time from 6h to 2min.
10K+/mo
AI chatbot queries handled in production
A multi-tenant assistant for a B2B SaaS, deployed on Cloudflare Workers with sub-300ms p95.
$1.2M
Helped a non-technical founder raise seed
Shipped the demo-ready product in 6 weeks. She closed her round 3 weeks later. Still working with us 24 months later.
Who We Help
Three kinds of teams. One way of working: fast, transparent, US-friendly.
For Startups
You need a CTO-level partner without a CTO-level burn rate.
- MVP launchFrom idea to first paying user in 4–8 weeks.
- Product iterationWeekly sprints driven by user feedback, not your gut.
- CTO replacementWe own delivery so you can own fundraising and growth.
For SMBs
Internal teams stretched thin. Tools that should already exist, don't.
- AI automationReplace repetitive ops work with assistants that pay for themselves.
- Internal toolsDashboards and workflows your team will actually use.
- Custom CRM systemsBuilt around your sales motion, not someone else's template.
For Enterprises
You need senior engineering capacity without 6-month hiring cycles.
- Dedicated offshore teamA pod of 3–6 engineers, embedded into your stack and rituals.
- AI integrationLayer LLMs onto existing systems without breaking what works.
- Legacy modernizationMigrate aging stacks step-by-step, with zero downtime expected.
Case Studies
Three projects. Three different shapes of pressure.
Client names withheld under NDA. Numbers and tech stacks are real.
Healthcare Logistics
Built a HIPAA-aware MVP in 21 days for a US healthcare startup
- Client Problem
- A two-person founding team needed to validate a courier-dispatch product with three pilot clinics in under a month. Their previous agency had quoted 5 months and refused to work with PHI without a signed BAA.
- Our Solution
- We compressed scope to 4 must-have flows, used a HIPAA-eligible Postgres on AWS, and shipped weekly. Founders saw demos every Friday. We treated PHI as untouchable and routed it through encrypted channels only.
- Timeline
- 21 days from kickoff to first pilot user
- Tech Stack
- Next.js 14 Postgres (AWS RDS) Twilio Stripe Vercel Resend
Business Impact
- Onboarded 3 pilot clinics in week 4
- Closed $750K seed round 8 weeks later
- Zero PHI incidents in first 90 days
B2B SaaS Support
Cut a 20-person SMB's manual support workload by 40% in 4 weeks
- Client Problem
- A US SaaS company with one support lead was drowning in 600+ Zendesk tickets per week. 70% of tickets were repeat questions answered in their Notion docs, but customers never found them.
- Our Solution
- We built a GPT-4o chatbot with RAG over their Notion workspace, deployed inside Intercom. The bot answered 4 out of 10 tickets autonomously and routed the rest with a draft reply for the human agent.
- Timeline
- 4 weeks from kickoff to production
- Tech Stack
- OpenAI GPT-4o Pinecone Notion API Intercom Cloudflare Workers
Business Impact
- 40% reduction in human-handled tickets
- Median response time fell from 6h to 2min
- Saved ~$72K/year in additional headcount
AI Tools for Creators
Helped a non-technical founder ship the demo that closed her seed round
- Client Problem
- A solo founder with deep marketing expertise but no engineering background had a strong vision for an AI tool for newsletter writers. She had 6 weeks before her next round of investor meetings and no working product.
- Our Solution
- We acted as her embedded engineering team for 6 weeks: scoped 3 hero features, shipped a polished web app with auth, billing, and a fine-tuned writing assistant. Daily Loom updates kept her in the loop without daily standups.
- Timeline
- 6 weeks from contract to demo-ready
- Tech Stack
- Next.js Supabase Stripe Anthropic Claude Vercel
Business Impact
- Closed $1.2M seed round 3 weeks after demo day
- 120 paying customers in first 60 days
- Founder still works with us 24 months later
How We Work
Six steps. No surprises. No status meetings.
- 01Loom Notion
Discovery
60-min intro call. We pressure-test your scope and tell you if it fits 4–8 weeks.
- 02Notion Linear
Sprint Planning
Week-zero workshop. We co-write the product spec and ship a roadmap you can show your investors.
- 03Loom Slack
Weekly Updates
Every Friday: 5-min Loom demo, written notes, decisions for the next sprint. No status meetings.
- 04Playwright Sentry
QA & Testing
We run our own QA before you see anything. Bugs fixed in the same sprint, never punted.
- 05Vercel GitHub Actions
Deployment
CI/CD on day one. Preview URLs for every PR. Production deploys with one click.
- 06Sentry Slack
Support
After launch we stay on. Monthly retainer for fixes, monitoring, and the next round of features.
Why Us
The reasons US founders choose to work with us — and stay.
AI-assisted development workflow
We pair every engineer with Cursor and Claude. Output per dev-day is 2–3× higher than traditional shops.
US timezone overlap
Our team is online from US Pacific 7am–11am. Real-time when it matters, async the rest of the day.
Founder-led communication
You talk to the people writing the code. No account managers, no PM-of-PM games.
Startup-speed execution
We ship weekly. If a sprint slips, you hear about it on Friday — not at the end-of-month invoice.
Cost-efficient engineering
40–60% lower than US agencies for senior talent. Zero compromise on architecture or code review.
Strict IP protection
Mutual NDA on day one. Your code stays in your repos and your cloud. We never reuse it.
Team
Small team. Senior people. You'll talk to them, not a sales rep.
Shoucong Li
Founder & CEO
Ex-engineering lead at two YC-backed startups. Has shipped products from zero to one for US founders since 2018.
Lin Yu
Co-founder
Founder of NetQin (NYSE-listed) and Showself Mobile (Nasdaq-listed). Leads capital strategy and global expansion.
Yinliang Feng
CTO
Full-stack engineer focused on AI product infrastructure. Loves shipping code that makes founders look good in front of their investors.
FAQ
The questions US founders ask before signing.
If yours isn't here, the 30-min call is free.
How do you handle the timezone difference?
We overlap with US Pacific time roughly from 7am to 11am their time, which is when most realtime communication happens. The rest of the day runs on async: Loom videos for demos, written updates in Notion, and Slack threads with clear acceptance criteria. Most clients tell us they feel more in the loop than with their previous local team.
How do you protect our IP?
Every engagement starts with a mutual NDA before we see any of your code or product specs. Source code lives in your repos, on your cloud, with your accounts. We never reuse client code in other projects. If you offboard us, we hand over everything in 24 hours.
What if my project scope changes mid-build?
Scope changes are normal — we plan for them. We use weekly sprints, so each Friday is a natural checkpoint to add, drop, or re-prioritize. Small changes within a sprint are absorbed; bigger pivots get re-scoped together with you before the next sprint starts.
How do payments work?
For projects: 30% upfront, 30% at midpoint, 40% on delivery. For ongoing engagements: monthly invoicing on net-15 terms. We accept wire transfer, Wise, and Stripe. All invoices come from a US-banked entity for easy accounting.
What's your typical response time?
Within 4 business hours during US business days for any Slack message or email. Critical production issues get a response in under an hour, 24/7. We share an on-call schedule with every client so you always know who to reach.
Do you sign NDAs?
Always. We can use your NDA template or send ours — both are mutual and standard. Most clients have one signed within 24 hours of the first call.
Ready to build your AI product?
Send us a WhatsApp message. We'll listen, push back where it matters, and tell you whether we're the right fit.
No hard sell. Just expert advice.
WhatsApp
+86 183 1585 2058
Email
sddzlsc@gmail.com