Executive Overview
NeoBank is a fast-scaling European digital banking provider serving over 2.5 million retail customers. Rapid adoption led to transaction processing bottlenecks during peak trading and payday periods, threatening system stability and customer satisfaction.
The Challenge
The client's legacy monolithic backend was struggling under high concurrent loads of over 15,000 transactions per second. In-house recruiting in London was slow and expensive, with local senior Java engineers requiring up to 4 months notice periods.
- High database locking latency during peak hours.
- Lack of containerized microservices infrastructure for independent scaling.
- Urgent deadline to meet European PSD2 regulatory compliance within 6 months.
The CALIBERSOFT Solution
CALIBERSOFT sourced, interviewed, and deployed a dedicated squad of 14 senior engineers within 3 weeks. The team consisted of:
- 1 Solutions Architect: Designed distributed event-driven Kafka architecture.
- 8 Senior Java / Spring Boot Engineers: Rebuilt core payment processing services.
- 3 DevOps Engineers: Automated Kubernetes (AWS EKS) CI/CD pipelines & Terraform IaC.
- 2 QA Automation Engineers: Implemented end-to-end regression testing suites.
Technologies Implemented
Key Results & Client Feedback
"CALIBERSOFT's team did not just write code—they transformed our engineering culture. Their senior engineers operated seamlessly alongside our CTO, enabling us to pass PSD2 audit 2 months ahead of schedule and scale seamlessly."