Chengxin Computer designs and builds custom applications for companies that have outgrown spreadsheets and off-the-shelf tools. One team. Fixed scope. Software that fits the way your business already works.
Six kinds of work, one team. We replace the spreadsheet stack and the half-fitted SaaS bundle most companies live with: bespoke web apps, internal tools, integrations, mobile, AI, and the dashboards your team will actually open on Monday.
Customer portals, marketplaces, and product apps built on a modern stack — architected for the next ten years, not the next demo.
Operations consoles, admin panels, and back-office tools that turn five tabs of spreadsheets into one clean workflow your team trusts.
Connect the systems that already run your business: ERPs, CRMs, payment rails, logistics. Built once, documented, and tested at every release.
Native-feel iOS and Android apps for the field, the floor, or the customer in their pocket — shipped to both stores from one codebase.
LLM-powered features that earn their keep — document extraction, search, copilots, and analytics layered onto data you already own.
Discovery sprints, prototypes, and design systems for teams that want to validate the idea before they buy the engineering.
Every build follows the same shape. Predictable, fixed-fee, and never the kind of "discovery phase" that quietly bills for six months.
We sit with the people who'll use the software. You get a written brief, a clickable prototype, and a fixed-fee proposal — even if you never sign the next phase.
Flows, screens, and a working design system. Engineering reviews every artifact before it leaves the room, so nothing gets drawn that can't be built.
Two-week sprints, demoed live, deployed continuously. You see real software running on real data from sprint one — not a slide deck about it.
Source code, infrastructure, and documentation transferred to your team or kept on retainer with us. Your call — the keys are always yours.
"They replaced a six-figure SaaS stack and three years of half-finished internal tooling with one application our whole operations team uses every day. We own the code; they keep shipping."
You do. Source code, design files, and infrastructure are yours from the first commit — stored in your repos, on your cloud accounts, under your name. We work in your GitHub, not ours.
Fixed scope, fixed fee per phase. Discovery is a flat rate; design and build are quoted from the discovery output. No hourly meters, no "change request" surprises — if scope shifts, we re-plan and re-quote together before anything moves.
Fourteen weeks on average from kickoff to v1: two weeks discovery, two weeks design, ten weeks build. Two-week sprints, demoed live, deployed continuously. Your team has commit access and a shared Slack from day one.
Yes — about half of our clients have in-house engineers we partner with. We pair on the build, leave thorough docs, and most teams take ownership of the codebase within 6–12 months. The others keep us on a retainer; both work.
TypeScript, React, Node, Postgres, and AWS for most web apps. React Native for mobile. We pick the stack that fits the problem and your team — not the one we wrote the most blog posts about.
Chengxin Computer has designed and built custom applications for growing companies since 2021 — across financial services, manufacturing, healthcare, and the businesses that don't fit a category.