Senior Solutions Architect

We are seeking a Solutions Architect to lead a diverse portfolio of initiatives across the FTSE Russell Index platform estate, including operational risk remediation, regulatory compliance, resiliency improvements, and platform modernization.
 

This role requires a hands-on architect who can work effectively within complex, highly interconnected legacy systems, while driving pragmatic, incremental improvements in architecture, scalability, and operational efficiency.
 

You will balance run and change, ensuring stability of critical platforms while enabling transformation aligned to business and risk priorities.
 

Key Responsibilities

• Design and deliver scalable, resilient solutions across legacy and modern platforms.
• Lead architecture for risk, regulatory, and resilience-driven initiatives.
• Navigate and simplify complex (“spaghetti”) system landscapes while maintaining stability.
• Define target architectures and transition roadmaps, making pragmatic trade-offs.
• Act as a hands-on technical leader—review designs, support implementation, and build PoCs.
• Drive data-intensive and calculation-heavy system design, including ETL and processing pipelines.
• Ensure alignment with enterprise architecture, security standards, and governance.
• Partner with Engineering, Operations, Risk, and Product teams to deliver end-to-end solutions.
• Represent the domain in architecture forums and influence strategic decisions.
• Mentor engineers and uplift engineering and architectural practices.

Technology Environment

• Cloud: AWS (EC2, Lambda, Glue, EKS, S3, SQS, SNS)
• Backend: Python, Java / C# (.NET), APIs, microservices
• Frontend: Angular
• Data: SQL Server, PostgreSQL, ETL pipelines, data lake patterns
• Architecture: Event-driven systems, microservices, API-first design
• DevOps: CI/CD (GitHub Actions, Jenkins), Terraform, containerization (Docker/Kubernetes)
• Orchestration - : Airflow, Step Functions, BPM tools
• Observability (desirable): Grafana
• AI (desirable): AI/ML or GenAI adoption for automation and operational efficiency

Experience & Skills

• Proven experience as a Solutions Architect / Senior Technical Lead in complex enterprise environments.
• Strong track record working with legacy systems and distributed architectures.
• Deep expertise in AWS, data platforms, and microservices architecture.
• Strong development background in SQL,Python, Java or C# (.NET), and Angular.
• Experience designing highly resilient, scalable, and secure systems.
• Strong understanding of risk management, controls, and regulatory environments.
• Experience operating in matrix organizations with multiple stakeholders.
• Experience with AI/ML or intelligent automation use cases

What We’re Looking For

• Hands-on mindset – willing to dive into technical detail when needed
• Ability to balance ideal architecture with real-world constraints
• Strong risk-aware and control-focused thinking
• Excellent stakeholder management and communication skills
• Pragmatic, solutions-oriented approach to complex problems
• Curiosity and interest in modern technologies, including AI-driven capabilities

Nice to Have

• Experience in financial markets, index/benchmark platforms, or market data
• Exposure to BPM/workflow automation tools

Career Stage:

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

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