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Bùi Hữu Tiến
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Available for new opportunities

Bùi Hữu Tiến

Full-stack Engineer building production SaaS, EdTech & AI systems.

3+ years shipping end-to-end products for 15K+ users. I build scalable web applications, robust backend systems and production AI workflows that solve real product problems.

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Portrait of Bùi Hữu Tiến

  • 3+

    Years Experience

    Building real products

  • 15K+

    Users

    Across 2 EdTech platforms

  • 70+

    API Endpoints

    In a multi-tenant SaaS

  • SaaS / EdTech / AI

    Domains

    Real-world production experience

Selected Work

A few products I've built and contributed to, from EdTech platforms to AI-powered tools.

View all projects
  • Prep4u homepage: free Digital SAT mock test with automatic scoring
    • EdTech · SAT
    • Production
    • 12K+ users

    Prep4u

    Digital SAT prep platform with 12K+ users. I designed and built its diagnostics and retention layer: score prediction, an adaptive placement test and a sales retention CRM.

    • Readiness Engine: Wilson lower bound + Bayesian smoothing, anti-gaming by design
    • Multistage adaptive placement test with row-locked submissions
    • Weakness Map that links each weak skill to targeted practice
    • Self-initiated sales retention CRM with cohort retention dashboard
    • Laravel
    • Livewire
    • Alpine.js
    • MySQL
    • Redis
  • Edly homepage: an IELTS and SAT/ACT platform for classrooms and exam rooms
    • EdTech · LMS
    • Production
    • 3K+ users

    Edly

    IELTS & SAT learning platform with 3K+ users and 61K+ questions. I created its dictation practice and pre-exam warm-up, and built module-based assignments and AI question analysis.

    • Dictation practice from IELTS Listening, AI translations checked by QA rules
    • Pre-exam warm-up: versioned config, idempotent server-side scoring
    • Module-based exam sharing and class assignments
    • OpenAI question analysis: transcripts, difficulty and category
    • Laravel
    • Vue 3
    • TypeScript
    • Inertia.js
    • MongoDB
    • OpenAI
    • AI / LLM
    • Automation
    • Internal tool

    AI Slack Check

    Self-initiated, solo-built internal tool: an LLM pipeline that turns free-form Vietnamese Slack messages into structured attendance data for HR, covering ~50 employees.

    • Hybrid rule-based + LLM extraction pipeline
    • Few-shot prompts with JSON schema validation
    • Human-in-the-loop: confidence score & audit trail
    • Incremental Slack sync & HR dashboard
    • Node.js
    • Fastify
    • TypeScript
    • Claude API
    • PostgreSQL
    • React
    • SaaS · Multi-tenant
    • B2B · Japan
    • 59 PRs merged

    Benerio

    Multi-tenant B2B SaaS that lets Japanese multi-location businesses manage Google Business Profile and Instagram / Facebook / Threads in one place. I built core GBP features, the partner agency tool and plan-bound access.

    • GBP module: business info, review replies, scheduled posts, analytics with PDF export
    • Partner agency tool: client management, drafts, schedules, failed-post handling
    • Plans and usage: accounts bound to plans, per-location permissions with RLS
    • Google OAuth linking and idempotent post sync (upsert + cleanup)
    • Next.js
    • TypeScript
    • Supabase
    • PostgreSQL
    • Tailwind CSS
    • Vercel
    • Backend
    • AI
    • Social mobile

    Snacktime AFP

    Backend API for a social mobile app where friends create AI-generated photos together.

    • Async AI image pipeline with Cloudflare Queues & Redis
    • Timezone-aware cron for automatic generation
    • Retry, distributed lock & rate limiting
    • Push notifications (FCM) & friends-of-friends suggestions
    • Cloudflare Workers
    • Hono
    • PostgreSQL
    • Redis
    • Firebase FCM

Engineering Strengths

End-to-end skills for turning ideas into real, scalable products.

  • Full-stack Development

    Build complete web applications from database and APIs to frontend, with a focus on performance and user experience.

  • Backend / API Design

    Design robust, scalable APIs with clean architecture, validation, authentication and role-based access control.

  • AI / LLM Integration

    Integrate LLMs into real products with structured output, validation and human-in-the-loop review.

  • Cloud / DevOps

    Deploy and run production systems with Docker, CI/CD, serverless workers and queues.

Tech Stack

Technologies I use to build modern web applications.

Frontend

  • TypeScript
  • JavaScript
  • Vue 3
  • React
  • Next.js
  • Inertia.js
  • Livewire
  • Tailwind CSS

Backend

  • PHP
  • Laravel
  • Node.js
  • Hono
  • Fastify
  • REST API

Database

  • MySQL
  • PostgreSQL
  • MongoDB
  • Redis
  • Supabase

Cloud / DevOps

  • Cloudflare Workers/Queues/R2
  • Docker
  • GitHub Actions
  • Vercel
  • Railway

AI / APIs

  • OpenAI
  • Anthropic Claude
  • Google Business Profile API
  • Slack API
  • Firebase FCM

Experience

My professional journey so far.

  1. –

    Work

    Protean Studios

    Software Engineer

    • Built and maintained web applications and backend APIs for EdTech, SaaS, social mobile and AI automation products.
    • Owned features end to end: business analysis, database design, APIs, UI and production deployment.
    • Led a team of 2 developers on the Prep4u & Edly platforms.

  2. –

    Work

    Musashi Việt Nam

    Software Engineer

    • Developed and maintained outsourced projects for Japanese clients.
    • Turned Figma/XD designs into responsive HTML and WordPress themes; built features with Vue.js, Laravel and MySQL.

  3. –

    Education

    FPT Polytechnic College

    Website Design

    • GPA 7.9/10

Let's build something great

I'm always open to discussing new opportunities, interesting projects or just having a chat about technology.

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