Case Studies

Challenge

A London-based HR-tech startup needed fractional CTO support to scale their social mentoring platform. The system could only handle 5 concurrent users before experiencing severe performance degradation — completely inadequate for their UK enterprise client base.

Solution

As Rungway's interim CTO, our founder delivered a complete architectural transformation: migrating from Neo4J to a hybrid MySQL/NoSQL architecture for the primary data store (retaining Neo4J for AI/ML), implementing microservices with domain-driven design, establishing Infrastructure as Code with AWS, building CI/CD pipelines, introducing event-driven architecture with SQS, and containerizing the entire stack.

Results

• Scaled from 5 to 1000+ concurrent users
• Zero-downtime database migration
• Modern DevOps foundations established
• Event-driven microservices architecture

Challenge

Leading UK fintech payment provider needed Kubernetes consulting to modernize their infrastructure and integrate new payment channels (Apple Pay, Google Pay) while maintaining 100% uptime for critical transaction processing across Europe.

Solution

Working inside the Opayo platform team from August 2019 to June 2026, our founder orchestrated a comprehensive AWS EKS migration with Kubernetes and Helm, implementing GitOps workflows and Infrastructure as Code using Terraform — managing the transition from monolithic architecture to microservices, establishing Jenkins CI/CD pipelines on Kubernetes, and scaling engineering culture across distributed teams.

Results

• Accelerated releases from every 2 weeks to multiple times per day
• Contributed to 10% revenue increase through faster feature delivery
• Reduced CI pipeline failures through automated testing
• Successfully integrated Apple Pay and Google Pay

Challenge

AstraZeneca needed to replace manual spreadsheet-based drug delivery tracking with a modern web-based tool to improve efficiency and accelerate time-to-market for pharmaceutical products. The system required integration with existing workflows while maintaining regulatory compliance.

Solution

Our founder built a production-grade web application with REST APIs and automated CI/CD pipelines, collaborating closely with stakeholders and business analysts to define requirements and align delivery with business goals — architecting scalable deployments on Kubernetes using Docker and Jenkins (config-as-code), and establishing robust testing practices with JUnit and Spock.

Results

• Accelerated delivery by 40% compared to manual processes
• Cut deployment errors by 30% through automated pipelines
• Improved stakeholder confidence through transparent roadmap planning
• Delivered production-ready MVP on Kubernetes infrastructure