Skip to content
SardineSardine

Machine Learning Engineer

Designs and builds ML systems for real-time fraud detection, including data pipelines, model deployment, and backend services in Go/Python. Requires 5+ years software engineering with applied ML experience on large datasets.

About the job

What you’ll be doing

  • Build and optimize data pipelines and backend services to process device and behavioral data in real time.
  • Develop and deploy ML models for fraud detection, ensuring they run reliably and efficiently in production.
  • Turn raw data into production-ready features that feed our fraud detection systems.
  • Collaborate with platform and backend engineers to integrate models seamlessly.
  • Maintain high standards of security, privacy, and compliance.
  • Champion best practices in testing, documentation, and observability.

What you’ll need

  • 5+ years in software engineering, with strong backend experience (Go or Python).
  • Hands-on experience with applied ML using large datasets (PyTorch, Scikit-learn, etc.).
  • Strong SQL skills and familiarity with relational and non-relational databases.
  • Experience with end-to-end ML systems: feature pipelines, model deployment, monitoring, and iteration.
  • Excellent communication skills in English, both written and verbal.
  • Bachelor's or Master's in Computer Science, Engineering, or a related discipline.

Bonus Points

  • Domain knowledge in fraud, risk, or cybersecurity.
  • Familiarity with CI/CD, Docker, Kubernetes and the modern devops framework.
  • Understanding of modern browser APIs and high-entropy data collection techniques.
  • Familiarity with leveraging frontier LLMs for automation.

Skills

Go, Python, PyTorch, scikit-learn, SQL, Docker, Kubernetes, CI/CD, LLMs

Build

Build

New York, NY
AI Engineer (Assistant)
$125k+/yrOn-siteML Engineering

Build and ship production agentic AI workflows for complex real estate and built-world processes. The role combines product engineering, applied AI, customer collaboration, workflow orchestration, evaluation, and reliable user-facing experiences.

Build

Build

New York, NY
AI Engineer - Assistant Experience
$120k+/yrOn-siteML Engineering

Build and operate Dougie, an agentic AI system that executes workflows, evaluates its own performance, retains institutional context, and improves in production. The role requires experience deploying unattended agentic systems and engineering reliable memory, retrieval, orchestration, and feedback loops.

Anthropic

Anthropic

London, United Kingdom

Research Engineer, Pretraining Scaling
£260k+/yrOn-siteML Engineering

Research Engineer responsible for operating and improving large-scale production pretraining systems, from performance optimization and hardware debugging to experiments, observability, and launch incident response. Requires deep ML systems expertise and experience with LLM training, JAX, TPU, PyTorch, or distributed systems.

Rollstack

Rollstack

United States
AI Software Engineer
No salary listedRemote3+ YOEML Engineering

Build production AI capabilities for automated slide and document generation, working across LLM applications, data analysis, and content generation. The role requires 3+ years in machine learning and NLP, advanced Python, and experience with LLM frameworks and production systems.

OpenAI

OpenAI

London, United Kingdom

Applied AI Engineer, Digital Natives
No salary listedHybridML Engineering

Build and deploy AI-powered products for digital-native customers, taking systems from experimentation through production and scale. The role requires strong Python skills, hands-on production engineering, systematic AI evaluation, and the ability to navigate reliability, security, governance, and customer impact.