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Updated weekly · Last refresh Oct 17

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 daily.

32questions
~4htotal time
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1
System DesignStart here. 11 questions · ~88 min
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
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
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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
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4
Behavioral & Leadership9 questions · ~72 min
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5
More topics6 questions · ~48 min
Handling Architectural Stakeholder ConflictMedium

Tests conflict resolution and influence when a stakeholder challenges an architectural decision with meaningful business or technical stakes.

Conflict ResolutionStakeholder ManagementCommunicationTransport for London
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 32 questions to finish this plan.