Case Studies

Challenge

A UK-based fintech was running a monolithic payment processing system that could not scale beyond peak-day volumes. Deployments required full-system downtime, and the lack of observability made incident response slow and error-prone.

Approach

• Decomposed the monolith into event-driven microservices using SQS, SNS, and EventBridge
• Implemented exponential backoff retry with dead-letter queues for payment resilience
• Introduced structured logging, distributed tracing, and real-time dashboards
• Migrated incrementally using the strangler fig pattern — zero downtime throughout

Results

Technologies

Challenge

A growing SaaS company with 8 engineering teams had no shared architecture standards. Each team made independent technology choices, leading to duplicated infrastructure, inconsistent APIs, and mounting technical debt that slowed feature delivery.

Approach

• Established Architecture Decision Records (ADRs) as the standard for capturing cross-team decisions
• Defined architecture guardrails with automated fitness tests enforced in CI/CD
• Created a compliance matrix showing each service's adherence to shared standards
• Ran monthly architecture reviews with team leads to evolve standards collaboratively

Results

Technologies