Open for freelance projects

Tan Nguyen

Technical Team Lead and Full Stack Engineer

I build practical software systems across web, mobile, backend, POS, payments, booking, CRM, and automation. My work combines 7+ years of PHP, TypeScript, Flutter, integrations, and DevOps experience with recent Generative AI agent work.

Discuss a Freelance Project View Project Work

Skills

Full-stack delivery across product, platform, and integrations.

Backend and APIs

PHPYii2LaravelLumenRESTful APIGraphQL ClientSQLNode.jsExpress.js

Frontend

JavaScriptTypeScriptVue.jsPiniaNuxt.js SSRReactFullCalendarScheduler

Mobile and Platforms

FlutterReact NativeJavaScript bridgeMini App SDK.NET Windows appsApp Store Connect

Integrations

ESC/POSUSB/BLE/Network printersPAXCloverStripeMoMoPayPalMagtekPlivoGoogle Actions CenterReserve with Google

DevOps and Automation

DockerLinuxNginxCloudflare WorkersPortainerCapRovern8nStrapiSupabase

AI and Realtime

Generative AI agentsPipecatOpenAI RealtimeGemini LivevLLMHugging Face modelsMCPChat/Voice AIMQTTMercure SSEWebRTCSocket.io

Freelance Services

Available for focused freelance builds.

I can help with short delivery cycles, integration-heavy features, platform work, and pragmatic product builds for teams that need senior execution.

Web Apps and Admin Systems

Build operational dashboards, internal tools, CRM flows, booking systems, and admin panels with reliable API-backed workflows.

Backend APIs and Integrations

Design REST APIs, payment flows, third-party integrations, authentication, notifications, and data services.

POS, Booking, and Commerce

Create POS features, thermal printer flows, staff attendance, loyalty, scheduling, pickup ordering, and payment integrations.

AI Agents and Automation

Connect chat or voice AI agents to existing services, MCP tools, low-code automations, and business workflows.

Timeline

Experience from internships to technical leadership.

  1. 1

    Mar 2023 - Present

    Technical Team Lead

    Smart Digitech

    Ho Chi Minh City, Vietnam

    • Lead Agile/SCRUM delivery across POS, booking, CRM, loyalty, attendance, and food ordering products.
    • Develop Yii2 REST APIs, maintain React Native applications, and support Flutter platform architecture.
    • Integrate ESC/POS printing, PAX, Clover, Stripe, MQTT, Mercure SSE, Docker, Cloudflare Workers, and microservices.
  2. 2

    Mar 2018 - Mar 2023

    Full Stack Engineer

    Smart Digitech

    Ho Chi Minh City, Vietnam

    • Built backend APIs, frontend modules, POS integrations, and internal platform capabilities.
    • Worked with Jira, Confluence, GitLab, Slack, Composer, Postman, npm, Yarn, and App Store Connect.
  3. 3

    Jun 2023 - Dec 2024

    Full Stack Engineer

    tiny.vn

    Ho Chi Minh City, Vietnam

    • Built network latency improvement software for gamers using Laravel APIs and Vue applications.
    • Delivered web, admin, and Electron-window client surfaces.
  4. 4

    Nov 2021 - Jan 2022

    Full Stack Engineer

    Superlution

    Ho Chi Minh City, Vietnam

    • Built Lumen backend APIs and Nuxt.js frontend for a crypto user and investor connection platform.
  5. 5

    Sep 2017 - Aug 2019

    Software Developer

    VNUHCM - University of Science

    Vietnam

    • Worked on WebRTC livestream broadcasting, PeerJS, TURN/STUN configuration, and Socket.io realtime gameshow features.
    • Delivered ReactJS, REST API, Google Maps API, WPF, Node.js, HTML, Handlebars, TCP, and UDP projects.
  6. 6

    Oct 2017 - Jan 2018

    Web Development Intern

    TRILUAT Information System Corporation

    Vietnam

    • Worked with C#, ASP.NET Zero, Angular 1.x, jQuery, Entity Framework, Swagger, REST APIs, and SVN.
  7. 7

    Jun 2016 - Aug 2016

    IT Help Desk Intern

    Matbao BPO

    Vietnam

    • Supported IT help desk operations during internship.

VNUHCM - University of Science

Bachelor's degree, Software Engineering ยท 2015 - 2019

Projects

Selected systems and products.

Hire for Similar Work

Smart Digitech

dtsmart.vn

Pipecat Voice AI Agent

Realtime voice AI agent using Pipecat with Plivo transport, WebRTC, and flexible model backends including LLM APIs, Gemini Live, OpenAI Realtime, and vLLM.

Voice AI agentRealtime mediaModel integration
Project Detail

Smart Digitech

dtsmart.vn

Reserve with Google Integration

Merchant onboarding and data feed workflow for Reserve with Google, enabling eligible services to show a Book now action on Google Maps through Google Actions Center.

Google booking integrationMerchant onboardingFeed operations
Project Detail

Freelance

thietbichebienthucpham.vn/

Food Processing Equipment E-commerce Website

Company e-commerce website for an industrial food processing equipment supplier, built with Strapi Headless CMS and Nuxt SSR and deployed on cPanel.

E-commerce websiteCMS developmentSSR frontend
Project Detail

Freelance

reckless.vn

reckless.vn API Synchronizing

API gateway for synchronizing orders and products across pages.fm, KiotViet, and Shopify, with advertising statistics from Facebook Graph API and TikTok Marketing API.

API integrationOrder synchronizationAds data pipeline
Project Detail

Freelance

E-commerce SKU Image and Warehouse Synchronization

E-commerce integration project that used Google Search API to match 10,000 product SKUs with images and synchronized products, orders, and warehouse data from Nhanh.vn.

Product data matchingWarehouse synchronizationCommerce integration
Project Detail

Freelance

dimteam.vn

dimteam.vn API Synchronizing

API gateway connecting Shopify order and product data from dimteam.vn with Nhanh.vn warehouse management, plus Docker-based Airflow and Metabase setup for analytics.

API synchronizationWarehouse integrationAnalytics setup
Project Detail

Freelance

Learning Chinese Website

Chinese learning website with a Yii2 backend, Nuxt frontend, YouTube iframe-based lessons, and an article module for content writers.

Education websiteBackend developmentFrontend development
Project Detail

Smart Digitech

dtsmart.vn

GCI App Platform

Flutter super-app platform with JavaScript bridge and mini app integration capabilities.

Platform architectureMobile integrationMini app SDK
Project Detail

Smart Digitech

dtsmart.vn

Go Booking System

Booking and scheduling product built around calendar workflows and operational staff coordination.

Booking workflowsCalendar UIBackend APIs
Project Detail

Smart Digitech

dtsmart.vn

Go POS System

POS product including mini app support, payment flows, and ESC/POS thermal printing integrations.

POS developmentPayment integrationPrinter integration
Project Detail

Smart Digitech

dtsmart.vn

Fastboy Marketing CRM

Marketing CRM system for customer engagement, campaign workflows, and operational tracking.

CRM developmentCustomer workflowsNotifications
Project Detail

Smart Digitech

dtsmart.vn

Online Food Ordering and Pickup

Online ordering and pickup workflow for restaurants and food-service operations.

Ordering workflowsCommerce APIsPayment integration
Project Detail

tiny.vn

Network Latency Improvement Software

Gaming network latency improvement software with web, admin, and Electron client surfaces.

Laravel APIVue appDesktop client
Project Detail

Contact

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Share your contact details and project context. I can follow up directly to discuss scope, timeline, and next steps.

Good fit for

  • Web apps, admin systems, CRM, booking, and POS workflows
  • Backend APIs, payments, third-party integrations, and automation
  • AI agents connected to existing business services

Direct contact

contact@xuantan97.com

Phu Nhuan District, HCMC

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