Machine Learning Engineer

The Role

In this role you will work in the Platform team – a function for the deployment and evolution of the backend platform that underpins the core of the Xantura business.

Key responsibilities

• Own and advance a predictive modelling platform that scales across problem types and tenants, using it to design, implement, and iterate models (embedding-based sequence encoders, temporal survival models, gradient boosted decision trees) that predict key vulnerabilities in housing, health, and other social domains.
• Track developments in ML and frontier models, running structured experiments to bring promising techniques into production safely.
• Build robust evaluation pipelines, training datasets, and model infrastructure to support continuous improvement of natural language\& predictive analytics.
• Ensure responsible AI deployment, embedding ethical and regulatory considerations into every stage of development.

What are we looking for?

Requirements

• Bachelor’s or Master’s degree in Computer Science, Machine Learning, or a related technical field – or equivalent practical experience.
• 3+ years of professional experience as an ML Engineer, or related role.
• Strong programming skills and production experience in Python.
• Experience building and maintaining data or ML pipelines with an orchestration tool such as Dagster (or Airflow, Prefect, etc.).
• Hands-on experience with common ML libraries and frameworks, e.g. PyTorch, scikit-learn, and gradient-boosting libraries such as XGBoost or LightGBM.
• Clear evidence of practical experience defining and deploying containerised systems,

*i.e.:*

• Implementing APIs for internal services, e.g. via FastAPI;
• Deploying containerised systems to production, in particular via Kubernetes.

In addition, the following would be an advantage

• PhD in Computer Science, Machine Learning, or a related field with a strong publication record in text analytics, representation learning, or applied predictive modelling.
• Working with vector databases and developing retrieval-augmented generation (RAG) pipelines – experience setting up/configuring vector DBs, as well as using, would be advantageous;
• Finding and productionising recent AI models (e.g. via Huggingface (transformers), OpenAI APIs);
• Building agentic systems (e.g. via LangChain, AutoGen, PydanticAI).
• Evidence of participating in Open-Source Software (OSS) development, public hackathons, or other sharable coding samples.
• Deep expertise in embedding-based architectures, including bi-encoders, cross encoders, etc. for long-horizon text or temporal prediction tasks.
• Practical experience building and serving production-ready, asynchronous APIs for embedding and/or other compute-intensive services.
• Proficiency in Python for building high-performance data and model pipelines, with strong software engineering discipline (testing, versioning, CI/CD).
• Good familiarity with the Azure ecosystem (Azure Kubernetes Service, Azure Batch, Azure AI Foundry, Azure Machine Learning, Azure Blob Storage, Azure Key Vault).

Location

This is a hybrid role based in our office in London. You would be expected to be able to work from the office at least 1-2 days per week.

About Xantura

At Xantura, we’re on a mission to reduce societal inequality by helping local authorities use data more effectively. Our AI-driven platform empowers frontline workers with the insights they need to prevent complex issues like homelessness or children being taken into care — before they happen. We make this possible by connecting siloed datasets, applying advanced machine learning to enrich the data, and using predictive analytics to identify those most at risk. Our platform then distills this into clear, actionable insights that help frontline staff intervene early and make a real difference.

It’s an exciting time to join Xantura. We’re scaling quickly, bringing on new clients, strengthening our platform, and expanding into new areas. While we’re a technology company at heart, our true focus is on improving lives — and we’re looking for people who share that vision.