Senior Machine Learning Engineer

Moonpay; Cape Town; On-site; ZAR 800 000 - 1 200 000; Full time

Job summary

A leading fintech company in Cape Town is seeking a Senior Machine Learning Engineer to develop and integrate machine learning solutions that enhance crypto product security. The ideal candidate has extensive experience in ML, especially in fraud prevention, and is proficient in Python and SQL. This role offers competitive compensation and the opportunity to work in a dynamic and innovative environment.

Benefits

Competitive salary package

Qualifications

• Experience in Machine Learning at leading Fintech startups.
• Ability to develop and maintain ML models in a fast-paced environment.
• Experience with time series data and classification.

Responsibilities

• Build and integrate ML solutions for transaction evaluation.
• Support Crypto products with tailored ML solutions for fraud prevention.
• Analyze large datasets using SQL, Python, and Apache Beam.
• Own the full lifecycle of ML solutions.

Skills

Machine Learning

Python

SQL

Data Structures

Big Data Processing

Fraud Prevention

Cloud Applications

Tools

PyTorch

Docker

Kubernetes

Apache Beam

FastAPI

BigQuery

GitHub

Job description

MoonPay City of Cape Town, Western Cape, South Africa

Senior Machine Learning Engineer

MoonPay City of Cape Town, Western Cape, South Africa

3 days ago Be among the first 25 applicants

Hi, we're MoonPay.

We're here to onboard the world to the decentralized economy.

Why?

Because crypto and blockchain aren't just technologies—they're tools for global financial empowerment.

They give people control over their money, their digital assets, and their future, unlocking opportunities that traditional systems have kept out of reach.

What We Do

At MoonPay, we're building the infrastructure that powers this new financial system.

We make it easy for anyone, anywhere, to buy, sell, and trade crypto using everyday payment methods like cards, Apple Pay, PayPal, Revolut and Venmo.

We provide simple tools to send, receive, and manage stablecoins, so anyone can participate in the crypto economy confidently.

Trusted by nearly 30 million customers and over companies, our secure, enterprise-grade platform is driving mainstream crypto adoption worldwide.

We collaborate with innovative brands and projects to build secure, scalable solutions for a blockchain-powered future.

And we're committed to doing it right—fully licensed in the U.S. and regulated across the UK, EU, Canada, and Australia—because trust and compliance are non-negotiable.

But we're just getting started.

We've launched a consumer app that makes crypto accessible, intuitive, and usable for everyone, and it's growing fast.

We're iterating every day to make it the best it can be.

If you believe financial freedom should be for everyone—if you believe in building a fairer, more open financial system—we want you with us.

To build systems that benefit all, we need contributions from all, regardless of background.

Come build the future of payments and the decentralized economy with MoonPay.

Let's make financial freedom and autonomy the new normal.

Locations Supported

About the Opportunity

Our engineering discipline builds the technology that enables MoonPay to learn quickly and scale easily.

We organize in small cross-functional squads of 4-6 engineers and an embedded Product Manager and Product Data Analyst.

We currently have squads across Crypto / NFT / Payments / FinCrime / KYC / Core Product and others.

For this role, the initial focus will be on working on our FinCrime products, while mastering other product areas to then spearhead ML and AI adoption in the company.

What you will do

• Build and integrate ML solutions for evaluating transactions and customers' behaviour in real-time and offline environments
• Support multiple Crypto products with tailored ML solutions to prevent fraudulent activities
• Experiment with various modeling techniques on our customer data and see your solution through to production by partnering cross-functionally with product, data, operations, and engineering teams
• Analyze large datasets using SQL, Python and Apache Beam to surface features
• Help build AI-powered automation tools or pipelines and propose improvements across the company
• Own the full lifecycle of ML solutions : data ingestion / processing ? feature engineering ? model development ? deployment ? iteration
• Maintain and improve our existing codebase, expanding our internal ML libraries and pipelines

What you will be working with

• Python
• ML feature engineering for fraud prevention
• Gradient boosting algorithms (e.g. XGBoost / CatBoost)
• PyTorch
• Polars, Pandas and Numpy
• BigQuery
• Apache Beam
• BigTable
• FastAPI
• Docker and Kubernetes
• Kubeflow and Airflow
• Vertex AI
• Redis
• Pydantic
• DataDog
• Github

About You

Experienced in Machine Learning at leading Fintech startups or fast growing tech companies

Confident in developing, releasing and maintaining ML models in a fast paced, iterative environment

Experienced with some of our tech stack, or are confident you can cross train and up skill quickly

Real world experience working with time series data for classification, counterfactual reasoning and adversarial models

Understand data structures, pipelines and big data processing for real-time consumption

Experienced with Cloud Native applications such as Google Cloud or similar e.g. AWS, Azure

We're looking for people who live our core values, those who strive for excellence and want to leave a lasting legacy on the global financial system.

Our values :

B - Be Hungry, L - Level Up, O - Own It, C - Crypto Curious, K - Kaizen

What's in it for you

Competitive salary package