Tran Quoc Huy

Flutter · Supabase / Postgres · Next.js · GitHub Actions

A field inspection system built end to end: a Flutter app where inspectors record findings on sites with no signal, a Supabase/Postgres backend, and a Next.js review console where the office reads submitted work.

Ownership, the read-only office view and the freeze on submitted work are enforced by row-level policy in Postgres rather than by the client, so removing the app's own gate leaks nothing. Offline drafts sync through an upsert on a device-generated key, so a retry cannot create a second row.

Verified: 279 Flutter tests and 41 admin tests green in CI; 183 pgTAP assertions covering silent authorization denials, run three times per CI pass; a 38-test smoke against the real hosted project through real Auth, RLS and Storage; a downloadable Android build with its sha256 published; and the offline workflow walked on two Android devices.

• Source ↗
• Live console ↗
• Android build ↗
• Case study →

Flutter · OpenAPI · bundled and cached data

A Flutter app giving one student cohort a single enrolment checklist where every step shows what stands behind it — the school's own notice, a confirmation from the cohort, or one senior's tip.

Provenance is a constructor requirement: a step marked official cannot be built without the school's own page attached, so a guess cannot reach the screen wearing the school's authority. A 9-operation OpenAPI contract fixes what each screen may ask for, and checklist data ships bundled and refreshes from a public repository — a refresh that fails keeps the data it had and says so, rather than presenting stale content as fresh.

Verified: Public repository, so the test command reproduces: 79 of 80 tests pass at the current head, the excluded one being tagged live. 14 screens captured on a physical device, a pass that caught a counting defect the green suite had missed. No CI — stated rather than implied.

• Source ↗
• Device evidence ↗
• Case study →

Flutter · SQLite

A journaling product built around one photograph and one sentence a day, with timeline, calendar, search and an optional reminder, designed to stay useful with no account and no server.

Private by manifest rather than by policy: the release build declares no INTERNET permission, so the app has no route off the device. The consequence is stated to the user on the first screen — uninstalling loses the data — and encrypted export through the system share sheet is the answer to it.

Partial: 220 tests pass; the release build refuses to produce an unsigned artifact by design, so a regression to the debug key fails loudly. Verified on Android hardware. The repository is private, so the unedited command output is published rather than the run itself, and no store publication is claimed.

• Test output ↗
• Privacy policy ↗
• Case study →

Next.js · TypeScript · OpenAPI

A rewrite with explicit frontend, backend and shared boundaries and reusable contracts, plus the release and verification workflow around it.

The OpenAPI contract is the specification, the generated types and the runtime validator at once, so an endpoint that drifts from it fails a gate instead of production.

Unavailable: Private repository. No inspectable artifact is published, so no test counts or CI results are claimed here; source access for review on request.

• Built React and TypeScript product features across internal operations and video-streaming platforms, working with product and cross-functional teams.
• Contributed to frontend modernization: micro-frontend architecture, Next.js and Nx adoption, reusable UI and performance work.
• Built React Native and Expo mobile flows including REST integration, authentication, payments, push notifications and Android/iOS delivery.
• Reviewed code and mentored junior developers.

• Designed React-based frontend solutions for logistics and shipping systems, and helped migrate legacy areas toward a modern frontend architecture.
• Delivered master-data and contract workflows, and real-time ship and cargo route visualization used for operational decisions.
• Mentored junior developers and contributed to maintainability and frontend engineering practices.

• Built online-education platform features with AngularJS and TypeScript-era tooling, responsive marketing pages and D3/SVG client prototypes.
• Worked in Scrum: estimated backlog items, clarified requirements, implemented features, refactored and reviewed.

• Built HTML, CSS, JavaScript and SVG education content, and converted legacy Flash learning material to the web.
• Maintained frontend code and fixed defects for a movie-streaming platform.