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Updated weekly · Last refresh Aug 30

Transport for London Solutions Architect Interview Questions

The questions to prepare for a Transport for London Solutions Architect interview. Questions from real interview reports rank first. Updated weekly.

33questions
~4htotal time
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1
System DesignStart here. 11 questions · ~88 min
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingTransport for London
Design Real-Time ML PredictionsHard

Design a real-time prediction system with low latency, fresh features, and safe fallbacks under traffic spikes.

InfrastructureFeature DriftModel ServingTransport for London
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2
Pipelines3 questions · ~24 min
Optimize a Pipeline BottleneckMedium

Explain how you identified and fixed a bottleneck in a data pipeline while preserving correctness and operational visibility.

data processingperformancebottleneck optimizationTransport for London
Rapid Deployment vs AvailabilityMedium

Tests your approach to deployment strategies that preserve availability in production systems.

technical debtdeploymentTransport for London
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3
Coding3 questions · ~24 min
Refactor Heavy-Traffic CodeMedium

Assesses performance diagnosis and refactoring decisions under high-load conditions.

refactoringTransport for London
Debug High-Throughput API BottlenecksMedium

Evaluates your troubleshooting process for throughput and latency issues in production APIs.

DebuggingTransport for London
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4
Behavioral & Leadership12 questions · ~96 min
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5
More topics4 questions · ~32 min
High Availability in Legacy SystemsMedium

Evaluates your ability to design resilient architectures under legacy constraints.

system designlegacy systemshigh availabilityTransport for London
Convince a Skeptical StakeholderMedium

Tests stakeholder communication and persuasion for adoption of new technology.

Stakeholder ManagementTransport for London
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The finish line: interview-readyComplete all 33 questions to finish this plan.