LSEG (London Stock Exchange Group)

About the Company

LSEG (London Stock Exchange Group) is a diversified international markets infrastructure business —earning our clients’ trust for over 300 years. That legacy of customer-focused excellence ensures that you can rely on our expertise in capital formation, intellectual property and risk and balance sheet management.

As global leaders in financial indexing, benchmarking and analytic services, we offer unrivalled access to international capital markets. Our high-performance technology solutions enable companies worldwide to access funds for growth and development. And with our Data & Analytics, Capital Markets and Post Trade divisions, we provide a comprehensive, integrated suite of trusted financial market infrastructure services that help our customers pursue—and achieve—their ambitions.

You can count on our open access model for unparalleled partnership, flexibility, stability, and support across all of our businesses. That’s how we make a difference— ensuring people can meet their potential—worldwide.

Listed Jobs

Company Name

LSEG (London Stock Exchange Group)

Job Title

Principal AI Architect

Job Description

**Job Title:** Principal AI Architect **Role Summary:** Lead design, governance, and innovation of AI/ML platforms, ensuring technical excellence and cutting-edge capabilities through hands-on architecture leadership, mentorship, and cross-team collaboration. Drive research on emerging AI technologies to shape scalable, compliant solutions. **Expectations:** Strategic leadership in AI/ML architecture, hands-on technical expertise in model and system development, innovation in generative AI and machine learning, and mentorship of AI/ML teams to foster technical best practices. **Key Responsibilities:** - Define and evolve AI/ML architecture for scalable, governed systems (Lakehouse, warehouse, etc.) with robust data lineage and performance. - Conduct code/model reviews for quality, reproducibility, and adherence to best practices. - Own and enhance AI/ML tooling (experiment tracking, pipelines, deployment, CI/CD, observability). - Develop shared libraries/frameworks for model training, evaluation, and deployment. - Research and integrate advancements in GenAI (LLMs, multimodal models) and ML frameworks (PyTorch, TensorFlow). - Apply software engineering principles (SOLID, design patterns) to ensure maintainable, robust AI systems. - Ensure responsible AI practices (fairness, explainability, compliance with governance standards). - Collaborate with product/platform teams to deliver intelligent, scalable solutions. - Mentor engineers/scientists to drive technical excellence and innovation. **Required Skills:** - Expertise in supervised, unsupervised, and generative AI/ML models. - Deep understanding of model lifecycle (experimentation to production). - Proven hands-on experience with LLMs, prompt engineering, LangChain, vector/graph databases, and RAG. - Strong software engineering skills (SOLID, design patterns, scalable system design). - Proficiency in ML tooling (MLflow, Databricks/Snowflake, MLOps) and cloud platforms (AWS, GCP, Azure). - Experience deploying/monitoring AI/ML systems in production environments. **Required Education & Certifications:** - Bachelor’s/Master’s in Computer Science, AI/ML, or related field. - Relevant certifications in AI/ML (e.g., TensorFlow, AWS ML Specialty) preferred.

London, United kingdom

Hybrid

Senior

25-12-2025

Company Name

LSEG (London Stock Exchange Group)

Job Title

Senior Cloud Engineer

Job Description

**Job Title:** Senior Cloud Engineer **Role Summary:** Design, implement, and maintain scalable, secure cloud infrastructure and automation solutions across AWS, Azure, and GCP. Drive efficiency through scripting, IaC, and monitoring while collaborating with cross‑functional teams to ensure high availability and compliance. **Expectations:** - Deliver robust cloud architectures that meet performance, security, and cost targets. - Automate repetitive tasks to reduce manual effort and improve reliability. - Provide rapid troubleshooting and continuous improvement of infrastructure. - Keep abreast of emerging cloud services and best practices. **Key Responsibilities:** - Build and manage cloud infrastructure (AWS, Azure, GCP) using IaC tools (Terraform, CloudFormation). - Develop automation scripts in Python, PowerShell, Bash. - Design and maintain CI/CD pipelines (e.g., Jenkins, GitLab CI/CD). - Implement monitoring, logging, and alerting with DataDog, Prometheus, Grafana, ELK. - Collaborate with architecture, security, and operations teams to enforce compliance (HIPAA, PCI‑DSS, SOC 2). - Troubleshoot and resolve infrastructure incidents, ensuring high availability and scalability. - Document processes and provide knowledge transfer to team members. **Required Skills:** - 5+ years in automation and infrastructure engineering, focused on cloud and containerization. - Proficiency in Python, PowerShell, Bash. - Strong experience with IaC (Terraform or CloudFormation). - Expertise in designing secure, scalable cloud architectures. - Hands‑on with monitoring/logging tools (DataDog, Prometheus, Grafana, ELK). - Excellent communication and teamwork abilities. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field (or equivalent experience). - Preferred: Cloud certifications (AWS Solutions Architect, Azure Administrator, GCP Professional Cloud Architect) or related automation/infrastructure credentials.

Chicago, United states

Hybrid

Senior

26-12-2025

Company Name

LSEG (London Stock Exchange Group)

Job Title

IT Security Officer

Job Description

**Job Title** IT Security Officer **Role Summary** Secure LCH SA’s IT infrastructure and business applications. Manage cyber security controls, incidents, and outsourced services following the NIST framework. Deliver monitoring, reporting, and continuous improvement of security posture. **Expectations** - Build and maintain the cyber security control library (Identify, Protect, Detect, Respond, Recover). - Evaluate and challenge outsourced security services. - Produce SLA/KPI reports and identify gaps. - Support fellow security officers on control execution and assessment. **Key Responsibilities** - Conduct comprehensive security checks (anti‑malware coverage, firewall recertification, vulnerability remediation). - Automate controls via scripting (Python, Perl). - Assess outcomes of outsourced security activities. - Provide SLA/KPI dashboards and reports. - Review changes and problem closures impacting security (ITIL). - Oversee outsourced security service performance. - Mentor and assist other IT security staff. **Required Skills** - Network security - OS, database, middleware, application security - VMware cloud security - Secret management & encryption - Vulnerability management & patching - EDR/AV solutions - IAM/PAM - SIEM/SOC operations - Scripting (Python, Perl) - ITIL cyber security process knowledge - Strong communication, teamwork, problem‑solving, adaptability **Required Education & Certifications** - Bachelor’s degree in Computer Science, Engineering or related field (or equivalent experience). - Minimum 5 years as a Security Engineer or equivalent in regulated, high‑availability environments. - Prior experience as an IT/Cyber auditor is a plus. - Cyber security certifications (CISSP, GIAC, etc.) are desirable. - Fluency in English required.

Paris, France

Hybrid

Mid level

27-12-2025

Company Name

LSEG (London Stock Exchange Group)

Job Title

Full Stack / UI Developer

Job Description

**Job Title:** Full Stack / UI Developer **Role Summary:** Develop and enhance front‑end solutions for large‑scale blockchain‑based financial market products. Collaborate with product owners, architects, and cross‑functional teams to deliver scalable, reliable, and secure user interfaces that align with business and technology objectives. **Expectations:** - Deliver high‑quality code following TDD/BDD practices. - Maintain up‑to‑date expertise in modern web technologies and trends. - Communicate effectively with stakeholders at all levels. - Contribute to reducing technical debt and improving automation coverage. **Key Responsibilities:** - Design, develop, and optimize front‑end applications using TypeScript, React, Next.js (v14+), and Node.js. - Implement UI testing with Playwright or Cypress and integrate tests into GitLab pipelines. - Participate in the full product lifecycle, ensuring robustness and scalability of UI components. - Collaborate with back‑end and QA teams to integrate microservices and event‑driven architectures. - Deploy and monitor front‑end services on cloud platforms (Azure, AWS, or equivalent). - Work with SQL and NoSQL databases as required for front‑end data interactions. - Pair with SDET engineers to build and maintain an end‑to‑end automation suite. **Required Skills:** - Strong experience as a senior front‑end engineer. - Proficiency in TypeScript, JavaScript, React, and Next.js (v14+). - Hands‑on experience with UI testing frameworks (Playwright or Cypress). - Knowledge of microservices, event‑based architecture, and cloud deployment (Azure/AWS). - Familiarity with GitLab CI/CD pipelines. - Solid understanding of TDD/BDD methodologies. - Experience with SQL and NoSQL databases. - Excellent communication and stakeholder management abilities. - Ability to anticipate challenges and propose innovative solutions. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience). - Relevant certifications (e.g., Cloud Provider Associate/Professional, Scrum/Agile) are a plus but not mandatory.

London, United kingdom

Hybrid

28-12-2025