Machine Learning Jobs

Manager, Software Engineering

Lead a software engineering team building and operating Mastercard's Authentication Decisioning platform, a critical component of its global authentication ecosystem. Focus on delivering scalable, secure, and resilient systems using AI, business rules, and real-time decisioning to support digital payments security. Work across engineering, product, and security teams to drive technical strategy, operational excellence, and platform modernization at global scale.

Appcast Enterprise County Meath, United Kingdom

Staff Software Engineer - Machine Learning

This role involves leading the technical strategy for machine learning and AI across multiple teams in a large financial organisation. The engineer will drive MLOps standards, guide architectural decisions, and mentor other engineers while working on scalable, customer-facing AI systems. Collaboration with data science, product, and platform teams is central, with a focus on Gen AI, responsible AI, and enterprise-wide technical alignment.

Capital One Ec1Y8Af, United Kingdom

Manager, Software Engineering

Leads a software engineering team building and scaling Mastercard's Authentication Decisioning platform, which uses AI, business rules, and data enrichment to deliver real-time risk decisions at global scale. Focuses on technical delivery, operational excellence, and team development within a high-availability, security-critical environment.

Appcast Enterprise County Kildare, United Kingdom

Manager, Software Engineering

Lead a software engineering team building and scaling Mastercard's Authentication Decisioning platform, which delivers real-time risk and authentication decisions using AI, business rules, and data enrichment. Focus on operational excellence, secure software development, and cross-team collaboration to support large-scale, high-availability payment authentication systems.

Appcast Enterprise County Wicklow, United Kingdom

Senior AI Engineer

Lead the design and implementation of AI/ML solutions across the firm, managing a technical team and external providers. Drive the full AI lifecycle from model development to deployment, integrating with enterprise systems while shaping the technical strategy. Collaborate with business stakeholders to align AI use cases with strategic outcomes and ensure scalable, best-practice architecture.

A&O Shearman Bt132Bj, United Kingdom

Manager, Software Engineering

Lead a software engineering team building and scaling Mastercard's Authentication Decisioning platform, a critical component of its global authentication ecosystem. Focus on delivering secure, real-time risk decisions using AI models, business rules, and data enrichment at scale. Drive technical strategy, operational excellence, and team development while collaborating with cross-functional partners.

Appcast Enterprise Dundrum, United Kingdom

Junior Quantitative Researcher - Sports Betting/ London/ 75K

The Junior Quantitative Researcher will assist senior researchers in developing and maintaining predictive models and software systems for a leading sports betting fund. Responsibilities include statistical analysis, model development, and contributing to the enhancement of core programming libraries.

eFinancialCareers London, United Kingdom

On-site Permanent

Senior Quantitative Researcher - Systematic Macro Strategies

The role involves designing and managing data-driven trading models for global macroeconomic assets, primarily using futures and foreign exchange. Responsibilities include developing systematic trading strategies, applying advanced quantitative methods, and collaborating in a research-driven environment to enhance alpha models and portfolio construction techniques.

eFinancialCareers London, United Kingdom

On-site Permanent

Data Scientist

This role involves designing and developing customer-focused data science solutions, taking models from problem definition to deployment and monitoring. You will work closely with stakeholders to translate business questions into robust modelling approaches and partner with engineers and analysts to productionise models.

Harnham - Data and Analytics Recruitment Merseyside, United Kingdom £40,000 – £48,000 pa

Hybrid Permanent

Principal Data Scientist - Aristocrat

This role involves leading end-to-end data science initiatives to enhance player engagement, retention, and monetization in social casino games. The Principal Data Scientist will develop machine learning and reinforcement learning models, drive scalable experimentation, and translate complex insights into product decisions. They will also provide technical leadership, mentorship, and collaborate across engineering, MLOps, and game teams to build data products and improve decision-making frameworks.

eFinancialCareers London, United Kingdom

Deep Learning Researchers / Engineers- Sophisticated Prop Trading Firm

This role involves building a cutting-edge deep learning platform for a prop trading firm, focusing on neural networks, transformers, and LLM-driven research. You'll work in a greenfield environment with significant autonomy to shape the research stack and contribute to multi-modal modelling and modern NLP systems.

eFinancialCareers London, United Kingdom

On-site Permanent

Machine Learning Engineer - Quantitative Trading- Leading Market-Maker / Hedge Fund

Design and build machine learning infrastructure for training, inference, and large-scale research workflows in a high-performance trading environment. Collaborate with researchers and engineers to productionise ML models and improve experimentation tooling. Work at the intersection of software engineering, mathematics, and cutting-edge ML systems.

eFinancialCareers London, United Kingdom £200,000 – £250,000 pa

Machine Learning Researcher - Quantitative Trading- Leading Market-Maker / Hedge Fund

Salary: £200-250k base + £200-500k bonus // All experience levelsClient:One of the world's top quantitative market makers is expanding its Machine Learning and broader AI capabilities. Already a market leader, the firm has invested extensively in its data and research...

eFinancialCareers London, United Kingdom

Machine Learning Systems / AI Infrastructure Engineer- Quant / Systematic Trading Firms

Engineer cutting-edge machine learning infrastructure at scale within high-performance quantitative trading environments. Focus spans distributed training, GPU optimisation, low-latency inference, and full-stack ML systems, integrating hardware and software to accelerate research and production deployment. Work closely with researchers to build robust platforms for rapid model iteration and deployment on massive compute estates.

eFinancialCareers London, United Kingdom £250,000 – £700,000 pa

Global Head of Applied AI & Decision Systems - Commodities & Global Markets - Macquarie Group

Lead the global strategy for applied AI and decision systems within a financial markets and commodities context, driving enterprise-scale AI deployment across trading, risk, and operations. Focus on turning experimental AI into production-grade, governed systems with measurable business impact, working closely with engineering, risk, and business units. Emphasis on agentic AI, LLMs, and safe orchestration in regulated environments.

eFinancialCareers London, United Kingdom