Long Bui
Long Bui photographed against a carved stone wall

Welcome to my world

Hi, I'm Long Bui

Zero-to-one builder of trusted platforms

as Engineering Lead

I turn an idea into a platform that enterprises run their business on: architected for scale, automated end to end, certified against SOC 2 Type 2, ISO 27001 and GDPR, and proven by the teams who depend on it daily.

How I build GitHub LinkedIn Blog
5+
years shipping ERP and AI systems
0 → 1
product trusted by a multi-billion-dollar enterprise
3
compliance frameworks: SOC 2 Type 2 · ISO 27001 · GDPR

I turn your operational bottlenecks into compounding margin

  1. scanned document
    Vendor nameREF-00921 · 24 unitsTotal 12,480.00
    →by hand
    system input
    cycle time by stage
    0.4 dIntake
    0.6 dValidation
    3.2 dManual entry
    0.8 dApproval
    1.1 dFulfilment
    Bottleneck · 0 of 6.1 days

    01 · Business architecture

    Where your business leaks margin

    Business architecture that models the enterprise end to end, prices every bottleneck in cycle time, cost and margin, and ranks fixes by payback. Built to hold up in front of a board, and proven inside an enterprise at scale.

  2. orders_final_v3.xlsx
    #REF!Error#N/AError#VALUE!
    call supplier?? check stock
    →
    Dashboard
    0orders today
    0stock accuracy
    0invoices synced
    Sales→Inventory→Finance
    SO-10291Wholesaleshipped
    SO-10292Retailpacking
    SO-10293Exportawaiting stock
    live · updated 2s ago

    02 · ERP transformation

    Operations as a real-time system

    One source of truth across sales, inventory and finance. Decisions made on live numbers instead of last week's spreadsheet, and operating cost that stops scaling with headcount.

  3. Trust center
    SOC 2 Type 2audited
    ISO 27001certified
    GDPRcompliant
    Controls passing0 / 142
    Uptime · 90 days0%
    Audit passed0 findings ·
    compute → cloud · encrypted at rest

    03 · Security and availability

    Secure, compliant, resilient by design

    Encrypted from compute to cloud. SOC 2 Type 2, ISO 27001 and GDPR passed with zero exceptions. Multi-region failover built for 99.9999% availability, so revenue keeps flowing when infrastructure fails.

  4. Integration hub
    EDI 850 · 856SOAPbrowser bot
    ERP
    RESTwebhooksGraphQL
    09:41EDI 856 → ASN createdok
    09:40Shopify order → SO-10294ok
    09:38SOAP invoice syncretried · ok
    0records reconciled
    0 drift · 2 min ago

    04 · External integrations

    Legacy and modern systems, one language

    EDI, SOAP and browser bots on one side, REST and webhooks on the other, unified through one integration layer that reconciles instead of drifting. Every system runs on data you can trust.

  5. Email thread
    From: Supplier · shipment delayed two days, customs form attached
    customs_form.pdf · 2 pages · parsed
    AI
    Ops Agent AI · to supplier

    02:41 · carrier call
    Escalated to Long · needs approval

    05 · AI agent

    AI agents that work like team members

    Agents that read, decide and act across email, documents and phone calls, resolving exceptions around the clock. Humans step in only for the decisions that need them, so teams scale by judgement, not inbox volume.

  6. Roadmap · Q4
    W40W41W42W43W44
    Discovery
    Build
    Demo
    Hyper-care
    VNUSDEINPOcross-border team
    Release 2.4 · GA Friday

    06 · One: in production

    Live, trusted, in front of customers

    Architecture, automation and compliance landed, then the first customer demo. One owner and a cross-border team carried it from the first sketch to general availability for a global enterprise.

  7. LinkedIn · new message
    Long BuiEngineering lead · zero-to-one product builder

    Message on LinkedIn
    Replies within a day

    Interested?

    Let's talk about your next advantage

    If any of this sounds like the business you run, I would like to hear about it. One conversation is enough to find out where the margin is hiding.

    Contact me on LinkedIn

Experience

  1. — Present

    Stealth AI startup

    Engineering Lead · Full-time

    First member of an agentic AI startup in supply chain.

    • Define product strategy, MVP scope and release roadmaps with stakeholders, resolving delivery trade-offs in real time.
    • Build end-to-end AI systems: RAG, embeddings, knowledge graphs, multi-agent workflows, OCR, forecasting and computer vision.
    • Design multi- and single-tenant architectures with CI/CD across AWS, GCP and Render, including voice agents that place and receive calls.
  2. — Present

    VectorDI

    AI Consultant / Business Consultant · Freelance

    Took client ideas from MVP definition to deployed AI features.

    • Translated business goals into functional requirements and technical designs for intelligent search, decision support and workflow automation.
    • Built and deployed features end to end, then ran training and hyper-care so teams adopted them.
  3. —

    Novobi Inc

    Sr. Software Engineer / Sr. Consultant · Full-time

    Grew from part-time engineer to project manager and technical lead on Odoo ERP programmes.

    • Sr. Software Engineer / Sr. Consultant · Full-time —
    • Software Engineer III / ERP Consultant · Full-time —
    • Software Engineer II / ERP Consultant · Full-time —
    • Software Engineer I · Full-time —
    • Software Engineer · Part-time —
    • Led the ERP strategy and architecture for an ITAR-compliant automated drone shipping operation, including end-user training.
    • Defined the technical framework for Odoo implementations and a high-availability integration layer across ERP platforms.
    • Integrated Square, Shopify, BigCommerce and ShipStation into client ERPs; improved the CI/CD workflow and mentored junior engineers.

Stack

What I bring, by what it is for

Ten areas, one sentence each on what they mean for you. The headline tools are up front; the rest unfold if you want to check.

AI

Agents that do the work and only raise a hand when they must.

  • Multi-agent systems
  • Graph agent systems
  • RAG and advanced RAG
  • Knowledge graphs
  • AI evaluation
  • Guardrails
  • MCP
  • LangGraph
  • LangChain
  • Langfuse
  • Fine-tuning
  • Harness agent builder
  • Workflow builder
  • Zapier
  • n8n
  • OpenAI
  • Claude
  • Gemini
  • Bedrock
  • OpenRouter
  • Kimi
  • GLM
  • Grok
  • PyTorch
  • TensorFlow

Security & compliance

Compliance is designed in on day one, not audited in later.

  • SOC 2 Type 2
  • ISO 27001
  • GDPR
  • ITAR export control
  • OAuth2 · OIDC · SSO
  • RBAC
  • WAF & DDoS protection
  • Threat modelling
  • TLS
  • Audit trail
  • Disaster recovery
  • OWASP
  • Network protection
  • Website protection
  • OPSWAT

Architecture

Systems that still make sense in three years.

  • Multi-tenant SaaS
  • Event-driven systems
  • Modular monolith vs microservices
  • ERP integration patterns
  • System design
  • Commerce integrations
  • SaaS · IaaS · iPaaS delivery
  • CAP and consistency
  • Load balancing
  • Auto-scaling
  • CDN and DNS
  • Square · Shopify · BigCommerce · ShipStation

Backend

Durable workflows and clean APIs in Python first.

  • Python
  • Django
  • FastAPI
  • Odoo & OWL
  • Temporal
  • Pydantic
  • Go
  • Celery
  • asyncio and concurrency
  • REST and OpenAPI design
  • TortoiseORM
  • SQLAlchemy
  • JavaScript
  • Nginx
  • HAProxy

Data

Pipelines that reconcile instead of silently drifting.

  • PostgreSQL
  • ETL / ELT and data pipelines
  • Embeddings and vector search
  • Qdrant
  • Elasticsearch
  • OpenSearch
  • Redis / Valkey
  • Blob storage (S3 and others)
  • Data modelling
  • MySQL
  • MongoDB
  • DynamoDB
  • Cassandra
  • ScyllaDB
  • Memcached
  • Airflow
  • pandas

Cloud & DevOps

Shipping is boring: pipelines run themselves.

  • AWS
  • Azure
  • Google Cloud
  • Kubernetes & K9s
  • Terraform & Terragrunt
  • Docker
  • CI/CD design
  • Cloudflare
  • LocalStack
  • GitHub Actions
  • GitHub · GitLab
  • Jenkins
  • Render
  • Docker Compose
  • LocalStack
  • Linux
  • Source and version control

Reliability & monitoring

You see the failure before the customer does.

  • SLOs and error budgets
  • OpenTelemetry tracing
  • Grafana · Loki · Prometheus
  • Sentry
  • SRE practice
  • AWS, Azure and Google Cloud monitoring stacks
  • ADOT
  • Trace and span design
  • Alerting and on-call
  • Structured logging
  • Incident response
  • Load testing with JMeter
  • SLA management

Quality & testing

Automated at every layer, including the browser.

  • Test automation
  • Browser testing automation
  • Spec-driven testing with AI browsers
  • pytest
  • unittest
  • Locust
  • Go testing
  • Coverage
  • Ruff
  • Pyright
  • Git hooks
  • Code review

Frontend

Native HTML and small JavaScript before frameworks.

  • Vanilla JS
  • React
  • HTMX
  • AlpineJS
  • Tailwind CSS
  • OWL
  • Bootstrap

Business & leadership

From the business model to a team that ships it.

  • Business analysis
  • Process modelling
  • Product roadmaps
  • Stakeholder management
  • Cross-border team leadership
  • Customer demos
  • Requirements and functional specs
  • Agile delivery
  • Hiring and mentoring
  • Training and hyper-care
  • Budget and scope control
  • Technical writing

Writing

Notes from the blog

Fundamentals explained the way I wish they had been explained to me.

Non-relational databases, mapped out Wide-column vs row-oriented storage ReactJS from first principles Django ORM in asyncio: coroutines, threads and connections Python from sync to async, at the low level

All posts on the blog

Education and certificates

Background

Education

Ho Chi Minh City University of TechnologyĐại học Bách Khoa TP.HCMComputer Science · GPA 3.2 / 4
2017 — 2021
Nguyen Viet Xuan High SchoolSpecialised class · National physics award, provincial maths award
2014 — 2017

Certificates

Odoo 15 Functional Certification
87%
Odoo 14 Functional Certification
77%
Odoo 13 Functional Certification
71%
TOEIC Listening & Reading
815 / 990
TOEIC Speaking & Writing
300 / 400