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Data Analytics

Data Science Services

Build machine learning models that predict demand, risk, churn and price, and keep them accurate in production with disciplined MLOps.

Move from Hindsight to Foresight

Reports explain what happened last month. Data science estimates what will happen next and recommends what to do about it: which customers are likely to leave, how much stock each store will need, which loan applications carry hidden risk, or what price clears inventory without destroying margin. The value comes when those predictions are embedded in the workflows where decisions are made.

Hanoi Technology combines data scientists, machine learning engineers and data engineers in one team. We frame the business problem precisely, prove value with honest baselines, and deliver models as monitored, versioned services integrated with your CRM, ERP, apps or planning tools.

The Challenge

Why Many Machine Learning Initiatives Underdeliver

Practitioner research and our own project experience point to the same recurring obstacles.

Vague Problem Framing

Projects start from “let’s use AI on our data” instead of a specific decision and a measurable target. Models end up optimizing a metric nobody acts on.

Data That Is Not Fit for Modeling

Labels are missing, history is short, definitions changed over time, or features leak future information. These issues surface late and invalidate results that looked impressive in testing.

The Gap Between Notebook and Production

A model in a notebook lacks feature pipelines, versioning, CI/CD, scaling and integration. Handing it to an engineering team that did not build it creates delays and rework.

Silent Model Decay

Customer behavior, prices and markets change, and model accuracy erodes without anyone noticing. Without drift monitoring and retraining, yesterday’s good model becomes today’s liability.

Business Value

Business Value of Production-Grade Data Science

Sharper Forecasts

Statistical and machine learning forecasts that combine history, seasonality, promotions and external signals reduce stockouts, overstock and planning buffers.

Revenue Protection and Growth

Churn, propensity and next-best-action models focus retention and sales effort on the customers where it changes outcomes.

Better Risk Decisions

Scoring models for credit, fraud and claims identify risk earlier and more consistently than manual rules, with explanations reviewers can follow.

Optimized Operations

Optimization and simulation models improve routing, scheduling, pricing and capacity allocation under real-world constraints.

Repeatable, Governed Delivery

MLOps practices make every model reproducible, versioned and auditable, so new models ship faster and with less risk.

Explainable Outcomes

Feature attribution and clear documentation help business users, risk teams and regulators understand why a model makes the recommendations it does.

A Good Model Is One That Gets Used

Accuracy on a test set is necessary but not sufficient. We measure success by adoption and business impact: did planners accept the forecast, did retention offers reduce churn, did reviewers trust the score. That is why we involve end users from the first sprint and design how predictions appear in their tools.

Our Services

Hanoi Technology’s End-to-End Data Science Services

End-to-end data science capability, from the first hypothesis to a monitored model in production.

Use-Case Discovery and Feasibility

We work with business owners to identify decisions that can be improved with prediction, estimate the value at stake and check whether the data can support a model.

  • Use-case canvas and value estimate
  • Data availability and quality assessment
  • Go or no-go recommendation

Predictive Modeling

We develop classification, regression and time-series models using methods ranging from gradient boosting to deep learning, always compared against simple baselines.

  • Feature engineering and selection
  • Model training and tuning
  • Validation and backtesting report

Forecasting and Demand Sensing

We build hierarchical forecasts at product, location and channel level, with uncertainty ranges planners can use for safety stock and capacity decisions.

  • Hierarchical forecast models
  • Forecast accuracy tracking
  • Planner-facing forecast outputs

Optimization and Simulation

We combine predictions with mathematical optimization and simulation to recommend prices, routes, schedules or allocations that respect your business rules.

  • Optimization model formulation
  • Scenario and what-if simulation
  • Decision-support interface

MLOps and Model Operations

We industrialize models with feature pipelines, experiment tracking, model registries, CI/CD, and monitoring for drift, data quality and performance.

  • Training and deployment pipelines
  • Model registry and versioning
  • Drift and accuracy monitoring

Data Science Team Augmentation

We add experienced data scientists and ML engineers to your team, working in your tools and processes, with knowledge transfer built in.

  • Flexible team composition
  • Code reviews and best-practice coaching
  • Documentation and handover

Our Approach

Our Data Science Delivery Lifecycle

A structured approach that exposes risk early and keeps every model tied to a business outcome.

  1. 01

    Frame the Decision

    We define the decision to improve, the target variable, the success metric and the baseline the model must beat, together with the people who will use it.

    Deliverables: Problem statement and KPIs · Baseline definition

  2. 02

    Explore and Prepare Data

    We profile data sources, check for leakage and bias, and build reproducible feature pipelines rather than one-off extracts.

    Deliverables: Data exploration report · Feature pipeline code

  3. 03

    Model and Validate

    We train candidate models, backtest them on out-of-time data and share results transparently, including where the model performs poorly.

    Deliverables: Model comparison report · Explainability analysis

  4. 04

    Deploy and Integrate

    We package the selected model as a batch job or API, integrate outputs with business applications and run a controlled pilot or A/B test.

    Deliverables: Deployed model service · Pilot results and impact measurement

  5. 05

    Monitor and Retrain

    We monitor input drift, prediction quality and business KPIs, and retrain on a schedule or trigger, with every version tracked in a model registry.

    Deliverables: Monitoring dashboards · Retraining runbook

Use Cases

Data Science Use Cases We Deliver

Examples of models we design and operate across industries.

Customer Churn Prediction

A subscription business scores customers weekly on their likelihood to cancel. Customer success teams receive a prioritized list with the main drivers behind each score.

Store-Level Demand Forecasting

A retailer forecasts daily demand per product and store, accounting for promotions and holidays, and feeds results directly into replenishment.

Property Valuation

A real estate platform estimates property prices from location, features and comparable sales, giving agents and buyers an instant, explainable valuation.

Credit and Fraud Scoring

A lender combines application, bureau and behavioral data into scores that route low-risk cases to automatic approval and flag suspicious patterns for review.

Delivery Route and Fleet Optimization

A logistics operator predicts travel and service times and optimizes routes and dispatching each morning, reducing distance driven and late deliveries.

Predictive Maintenance

A manufacturer uses sensor and maintenance history to estimate failure risk per asset, scheduling service before breakdowns stop production.

Technology

Data Science Tools and Platforms

We use proven open-source and cloud-native tooling that your team can maintain.

  • Python
  • scikit-learn
  • XGBoost
  • LightGBM
  • PyTorch
  • statsmodels
  • Prophet
  • Databricks
  • MLflow
  • Azure Machine Learning
  • Amazon SageMaker
  • Vertex AI
  • Snowflake
  • Apache Airflow
  • Evidently
  • Docker

Platforms

Deliver Data Science on Your Preferred Platform

Why Hanoi Technology

Why Organizations Choose Hanoi Technology

Senior, Cross-Functional Teams

Strategy, data, AI, cloud and engineering specialists work as one team, so nothing is lost between hand-offs.

Proven Delivery

More than 50 projects delivered for clients in North America, Europe and Asia-Pacific.

Radical Transparency

A written update every week and a demo of working software every sprint, so you always know where things stand.

Cost-Effective Global Delivery

Experienced engineers from our Hanoi delivery hub, with working-hour overlap for every major time zone.

90%pricing accuracy

Success Story · Real estate

Transparent AI property valuation for a multi-city marketplace

A growing real estate marketplace wanted buyers to trust its prices. We built a valuation engine and property pages that compare the estimated value with the asking price.

Read the Full Story

More Success Stories

Food delivery

+58%total orders

AI dispatch and live tracking for a food delivery startup

A fast-growing urban food delivery startup was losing customers to slow deliveries at peak times. We built AI order dispatching and connected restaurants, drivers and customers in real time.

Explore All Success Stories

Resources

Featured Resources

Industry trends and practical guidance to help you get more value from data, AI and technology.

Put Your Data to Work with Machine Learning

Share the decision you want to improve and the data you have. We will reply within 24 hours and set up a free consultation to assess feasibility and potential value.

Data Science FAQ

How do we know whether our data is good enough for machine learning?

We run a short feasibility assessment before any major investment. It checks history length, label availability, data quality, how definitions changed over time and whether features are available at the moment a prediction is needed. We then train a quick baseline model to see whether there is a usable signal. The result is a clear recommendation: proceed, improve data first, or choose a different use case, so you avoid funding a model the data cannot support.

How long does a typical data science project take?

A feasibility assessment usually takes two to four weeks. Developing and validating a first production-candidate model typically takes another one to three months, depending on data complexity and integration needs. Deployment and a controlled pilot follow. We deliver in sprints with weekly written updates and demos, so you see intermediate results such as data findings and baseline accuracy early, and can redirect the work if priorities change.

What determines the cost of a machine learning model?

Cost depends mainly on data preparation effort, the number of models and segments, integration requirements, latency needs (batch versus real time), and the level of monitoring and support required after go-live. Cloud compute for training and inference is usually modest compared with engineering effort, but we estimate it explicitly. We provide a phased proposal so you can fund feasibility first and commit to production only once value is demonstrated.

How do you make sure models are fair and explainable?

We check training data for representation gaps, evaluate model performance across relevant segments and avoid sensitive attributes or close proxies where they are not appropriate. We use explainability techniques such as SHAP values to show which factors drive individual predictions and overall behavior. For regulated decisions, such as credit, we document model design, assumptions, limitations and validation results in a format suitable for internal model risk review.

Who owns the models and code you build?

You do. Models, code, feature pipelines and documentation are delivered into your repositories and cloud accounts, and intellectual property for client-specific work transfers to you under the contract. We avoid proprietary black-box components so your team can maintain, retrain or replace models independently. If you prefer, we can continue to operate and improve the models as a managed service with defined service levels.

Can you deploy models on our existing platform?

Yes. We regularly deploy on Databricks, Azure Machine Learning, Amazon SageMaker, Google Vertex AI, Snowflake and Kubernetes-based environments. We prefer to use the platform your team already runs, adding MLOps components such as MLflow for tracking and a registry where they are missing. If no platform exists, we recommend a right-sized option based on your cloud strategy, data volumes and skills, and explain the trade-offs.