Lead/Sr Machine Learning Engineer Python, PyTorch, AI

Company Introduction

Momo is one of Vietnam's leading fintech companies, serving more than 30 million users across payments, financial services, and everyday digital needs.

Our ambition is to become an AI-powered Financial Assistant for every Vietnamese. We use technology and data to make managing money simpler, more accessible, and more relevant, from payments and transfers to borrowing, saving, investing, and daily spending.

We are building an AI-first financial platform that helps more people access personalized and trusted financial services. AI is increasingly embedded in how we understand users, improve products, manage risk, and protect transactions.

About the Role

As a Senior Machine Learning Engineer, you will own the architecture and operation of production ML systems used at MoMo scale. You will connect research and modeling work with dependable software, data, and platform foundations.

You will lead complex delivery, make key technical decisions, and mentor engineers while keeping model quality, reliability, speed, and cost in balance.

• Large-scale personalization and recommendation systems
• Reusable ML platforms, feature pipelines, and model serving
• Reliability, monitoring, governance, and efficient model operations

Why work with us

• Build products for more than 30 million users at one of Vietnam's leading fintech companies.
• Work on AI and data systems that influence real customer and business outcomes.
• Solve complex problems across financial services, personalization, fraud, conversational AI, and large-scale platforms.
• Work across the full development lifecycle, from experimentation and engineering to production deployment and continuous improvement.

Job Description

• Work with Data Scientists to build Machine Learning systems using your engineering experience. As an example, suppose that we want to build a fraud detection system, you will take care of building the services necessary for retrieving user history, transforming data, applying machine learning models and connecting to other services for appropriate actions.In some situations, you can build the whole Machine Learning application from end to end;
• Design and build data pipelines that serve Machine Learning models;
• Provide a platform that is super easy for Data Scientists to explore new features, build models and conduct A/B tests;
• Build framework for monitoring Machine Learning systems.

• Bachelor's degree in Computer Science, Engineering, Mathematics, Data Science, or a related field;
• 3+ years of industry experience in software engineering/machine learning;
• Strong Python skills and hands-on experience with tabular processing libraries (Pandas, NumPy, Scikit-Learn, PySpark/Polars) and GBDT frameworks (XGBoost, LightGBM, CatBoost);
• In-depth understanding of the complete modeling lifecycle: data gathering, feature engineering, hyperparameter tuning, model serving, and post-deployment monitoring;
• Proficiency in PyTorch or TensorFlow for building custom neural architectures and tabular deep learning models;
• Ability to read, reproduce, and extend recent research papers;
• Strong analytical, problem-solving, and cross-functional collaboration skills.

We are passion with new technologies, not follow the old-track of outsourcing. We love our product and ready to sacrifice everything for it! You often argue with your boss? Don't worry, here in M_Service, you will get salary increase if you win your boss in argument. We love objection!!! You hate company trip in hotel, resort? We only conquer difficult and hottest road in team building. Do you want to join?

What you will get:

• Competitive compensation package.
• Performance-based bonus.
• Insurance package.
• Chance to work with smart people with international experience.

Our benefits:

• Attractive compensation & benefits.
• 13th month salary bonus and yearly performance bonus.
• 14 paid days off per year
• Premium health care insurance
• Great allowances (lunch, parking, birthday, happy hours....)
• Salary review at least one time per year based on employee's performance and contribution.
• Outing/team-building activities (company trip , soccer sport, english club, running club,..).
• Other benefits as per stated in Vietnamese Labor Law
• Work with experienced & strong team.
• Friendly, dynamic & flexible working environments.