Senior Architect, ADC/Quant - LSEG (London Stock Exchange Group)

We are seeking an expert Senior Architect to drive the technical vision, system design, and architectural governance for a large-scale, technically diverse engineering program. Operating across multiple complex domains, you will serve as the premier technical authority, designing mission-critical enterprise systems, overarching data ecosystems, and leading our artificial intelligence (AI) integration strategy.

The successful candidate will set the architectural target state, establish design patterns for highly resilient systems, and ensure technical coherence across a highly heterogeneous technology stack. You will partner with business stakeholders and engineering management to translate strategic objectives into robust, scalable, secure, and AI-ready architectures, navigating the complexities of a highly regulated, high-expectation environment.

What You’ll Bring (Experience & Competencies)

Extensive Architectural Experience: 8+ years of hands-on experience in software engineering, with at least 3+ years acting as a Principal or Senior Architect designing large-scale, high-throughput, and mission-critical enterprise distributed systems.

Deep Technical Breadth & Depth:

Advanced data architecture experience using Databricks, Microsoft Fabric , and large-scale data processing (Data Mesh/Lakehouse patterns).

Strong background in data integration and relational platforms

Proven experience designing highly available Hybrid and Multi-Cloud architectures (Azure & AWS).

AI & Machine Learning Exposure: Experience designing architectures that support AI/ML workloads, including integrating Large Language Models (LLMs), predictive analytics, and vector search into enterprise applications.

Enterprise Governance & Security: Deep understanding of security architecture, secure SDLC practices, data privacy, and compliance requirements typical of the London financial services sector.

Resilience & SRE: Advanced knowledge of building fault-tolerant architectures leveraging modern SRE principles, robust observability, and cloud-native resilience patterns.

Matrix Leadership: Exceptional stakeholder and client communication skills, with a track record of influencing cross-functional engineering pods, product managers, and C-level executives without requiring direct reporting lines.

Key Responsibilities

Architecture & Technical Strategy

Define and own the end-to-end target state architecture across diverse systems, data platforms, and cloud integrations.

Publish, maintain , and champion architectural blueprints, design patterns, and engineering excellence standards.

Lead the Architecture Review Board (ARB) process for the domain, ensuring technical designs strictly adhere to non-functional requirements (NFRs) such as scalability, maintainability, performance, latency, and security.

AI Strategy & Adoption