Architecting large-scale distributed systems and APIs with low latency and high reliability. Deep experience with API gateways, rate limiting, quota enforcement, and fair usage controls. Experience with scaling challenges: multitenancy, regionalisation, data boundaries, compliance, and graceful degradation. Designing systems with clear metrics, traces, and logs from day one. Balancing innovation with stability. Influencing across squads and aligning teams. Mentoring, reviewing, and building a culture of strong technical judgment. Hands-on debugging and problem-solving. Curiosity about AI augmentation in engineering.