Overview

At ThoughtWorks, I architected and delivered a mission-critical, event-driven customer onboarding system designed for resilient distributed transactions across microservices.

Problem

The existing onboarding flow was tightly coupled and fragile — failures in one service would cascade, leaving customers in inconsistent states. The business needed a reliable, scalable system that could handle high throughput while maintaining data consistency across multiple bounded contexts.

Solution

I designed an event-driven architecture using Kafka as the messaging backbone and the SAGA pattern for distributed transaction management. Each microservice owned its domain and communicated through events, with compensating transactions for failure recovery.

Tech Stack

• Java / Spring Boot — Core microservices
• Apache Kafka — Event streaming and messaging
• SAGA Pattern — Distributed transaction orchestration
• Microservices — Domain-driven service boundaries
• PostgreSQL — Per-service data stores

My Role

• Architected the end-to-end system design
• Defined event schemas and service contracts
• Implemented the SAGA orchestrator for transaction management
• Led code reviews and mentored team members on event-driven patterns

Impact

Enabled reliable, scalable onboarding across distributed microservices — eliminating cascading failures and providing a consistent customer experience at scale.