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Works

Projects our members delivered.

Hoang LLC was founded in December 2025. These are key projects our core members — each with 5+ years at Japanese companies — delivered for Japanese software companies and their clients.

Projects our members delivered.

About NDAs:The works shown here are anonymized — proper nouns and detailed specs are masked under our clients' NDAs. We can share more specific cases on request, within what is permitted, after an individual meeting.

  1. Cloud / SRENDA

    Telecom (major Japanese enterprise)

    Duration
    Nov 2025 – present
    Our team
    1 SRE engineer
    Project scale
    ~300 people (multiple teams)

    Real-time Data Lake platform for a major telecom carrier

    Building a real-time Data Lake platform handling data for ~90 million users at a major Japanese telecom carrier. As part of the SRE team, our engineer implemented the Data Lake module infrastructure — turning the architecture team’s design into Terraform IaC, automating CI/CD, and provisioning AWS resources.

    Outcome:High-availability infrastructure for 90M-user data, fully IaC’d with Terraform — drastically reducing manual work and making environment provisioning reproducible.

    See what we handled

    Our scope

    • IaC for the Data Lake module with Terraform
    • Network design including Multi-VPC / VPC Peering / PrivateLink
    • CI/CD pipelines with GitHub Actions and AWS CodePipeline / CodeBuild
    • Security setup for IAM, KMS, Secrets Manager, and Security Groups
    • Architecture validation for high availability and scalability

    Tech stack

    • AWS (EC2, ECR, Lambda, Aurora, MSK, ElastiCache, S3)
    • Terraform
    • GitHub Actions
    • AWS CodePipeline / CodeBuild
    • IAM / KMS / Secrets Manager
  2. AI AgentNDA

    E-commerce / Retail

    Duration
    Jul 2025 – Oct 2025 (4 months)
    Our team
    1 Team Lead + 1 Engineer (core of a 4-person team)
    Project scale
    4 people

    AI Agent for an e-commerce admin system

    Developing an AI Agent that lets admins operate an e-commerce management app through natural language. As core members including the Team Lead, we led the overall agent design, backend implementation, tool design, self-hosted LLM integration, and AWS setup.

    Outcome:Natural-language requests like "User A bought 3 of product B, create the order" are parsed by the agent → tool selection → execution, fully automated. A self-hosted LLM avoids external-API dependency and meets cost, data-governance, and security requirements.

    See what we handled

    Our scope

    • Overall AI Agent design (LangChain / LangGraph / ReAct)
    • FastAPI backend (Chat API / agent execution API / tool calls)
    • Tool design integrating the existing EC backend API (product & customer search, order creation, stock check)
    • Self-hosted LLM integration (GPT-OSS / Gemma 4): validation and implementation
    • AWS setup (backend / LLM runtime / MongoDB integration)

    Tech stack

    • Python (FastAPI)
    • LangChain / LangGraph / ReAct
    • Self-hosted LLM (GPT-OSS, Gemma 4)
    • MongoDB
    • AWS
    • JavaScript
  3. AI PlatformNDA

    SaaS (restaurants, shops, businesses)

    Duration
    Apr 2025 – Jul 2025 (4 months)
    Our team
    1 Team Lead + 2 Engineers (core of a 5-person team)
    Project scale
    5 people

    No-code AI Agent building platform

    A greenfield platform that lets restaurants, corporate sites, and shop owners build their own AI Agents from a web UI. As core members including the Team Lead, we led the initial design, tech selection, MVP development, and feature expansion.

    Outcome:Shipped the MVP of a no-code AI Agent SaaS platform in 4 months. Supporting both text and voice, it delivers a natural conversational experience for restaurants, shops, and corporate sites.

    See what we handled

    Our scope

    • Initial platform design, tech selection, and architecture
    • MVP development (frontend + backend + AI + Vector DB + AWS)
    • Agent creation, management, and chat UI in React.js
    • FastAPI APIs for agent management / docs / embedding / vector search
    • OCR, chunking, and embedding pipeline (Qdrant)
    • Real-time voice conversation via Gemini Live API

    Tech stack

    • React.js / JavaScript
    • Python (FastAPI)
    • ChatGPT API / Gemini Live API / Self-hosted LLM
    • Qdrant (Vector DB)
    • MongoDB
    • AWS (EC2, S3, CloudFront, Route 53)
    • WebSocket
  4. Business DXNDA

    B2B wholesale (fresh produce)

    Duration
    Apr 2022 – Mar 2025 (3 years)
    Our team
    1 SE/BrSE (Japan side) + Vietnam dev team
    Project scale
    6 people (Japan + Vietnam combined)

    3-year digital transformation for a produce wholesaler

    A DX project for a company wholesaling fresh produce to major supermarkets and restaurants. Working in a Japan–Vietnam cross-border setup, our team handled business analysis, requirements, design, implementation, and operations full-stack over three years — with regular reports to the CEO and ongoing bridge coordination with the Vietnam office.

    Outcome:Moving from paper to tablet invoices cut paper cost and data-entry time significantly. The step-by-step migration from MS-DOS to a modern stack completed successfully, while accumulating the data foundation for future AI-based purchasing forecasts and market analysis.

    See what we handled

    Our scope

    • Business analysis and short/long-term digitalization prioritization
    • Direct reports to the CEO every two weeks
    • Phase 1: B2B ordering system with real-time price updates
    • Phase 2: migrating a legacy MS-DOS system to a responsive GUI
    • Phase 3: "paperless" — digitizing handwritten tablet invoices
    • Bridge coordination, progress management, and Q&A with the Vietnam office

    Tech stack

    • Java (Spring Boot)
    • JavaScript (React)
    • Python (Tensorflow / FastAPI)
    • React Native / Swift
    • PostgreSQL
  5. Backend DevNDA

    E-commerce (anime goods)

    Duration
    Oct 2021 – Apr 2022 (6 months)
    Our team
    1 SE (backend team)
    Project scale
    30 people

    Backend for a large-scale anime-goods e-commerce site

    Backend development for a large-scale e-commerce site selling anime goods. As part of the backend team, our member implemented month-end batch processing, notification features, and the authentication foundation.

    Outcome:Contributed to an extensible backend built with design patterns. A Lambda Serverless setup reduced operational load, with quality maintained under a disciplined progress- and resource-management process.

    See what we handled

    Our scope

    • Implementation of a large-scale EC backend system
    • Month-end sales aggregation batch (AWS Lambda Serverless)
    • Error-reporting feature
    • Automated customer email delivery
    • Authentication with AWS Cognito, asset management with S3

    Tech stack

    • C# / ASP.NET Core 3
    • PostgreSQL
    • AWS Lambda (Serverless)
    • AWS Cognito
    • AWS S3
    • Vue.js
    • Linux
  6. Custom DevNDA

    E-commerce (SMB)

    Duration
    Sep 2021 – Dec 2021 (4 months)
    Our team
    1 SE
    Project scale
    5 people

    Warehouse management system for an e-commerce SMB

    Building a warehouse management system for a small e-commerce company. Integrating with a third party’s EC site API, we digitized the warehouse workflow — implementing a responsive web app, invoice design, and data export.

    Outcome:Delivered a quality-first process — adhering to shared formats and documenting pixel-level design as a deliverable.

    See what we handled

    Our scope

    • Responsive web app
    • Pixel-perfect invoice design and implementation
    • PDF / CSV data export
    • Integration with a third-party EC API

    Tech stack

    • Java
    • Spring MVC
    • PostgreSQL

Discuss your project

We're happy to discuss the details of these works or whether we can take on a similar project. With an NDA in place, we can share more specific information.

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