1.5 million users. Zero tolerance for downtime. One team to build it right.

Serving 1.5 million users on a platform built for a fraction of that is not a performance problem. It is a structural one.

The client's web and mobile applications were running examinations and certifications, high-stakes interactions where downtime is not an inconvenience, it is a failure with real consequences for real students. The platform had to handle peak exam periods where traffic surges are not gradual, they are sudden and unforgiving.

On top of that, the product roadmap was not frozen. New features had to be integrated continuously without disrupting existing services. Every deployment was a calculated risk on a live platform that could not afford to go down.

The team that could solve this had to bring very specific experience. Microservices architecture at scale, cloud infrastructure that auto-scales under real load, native mobile development across iOS and Android, and the engineering discipline to ship new features without touching what was already working.

Fifteen engineers working in parallel across web, mobile and infrastructure is not a team you assemble through a job posting and three rounds of interviews. By the time that process produces a shortlist, the project window has already shrunk.

The client came to Talex with a specific brief and a tight timeline. Within days they had a vetted shortlist of specialists - four backend engineers, three frontend developers, four mobile developers with native iOS and Android experience, two DevOps engineers, and two QA engineers. Every person interviewed and selected by the client directly. No agency deciding who was good enough on their behalf.

What made that possible is a talent pool built over two decades of software delivery, filtered through a vetting process that goes well beyond technical assessment. Domain relevance, professional track record, communication, and the commitment profile that a high-pressure 11-month engagement actually requires - all assessed before the client saw a single profile.

The team decomposed the system into loosely coupled microservices, enabling parallel development across workstreams without teams blocking each other. AWS infrastructure was built for elasticity from the start — EKS for containerized deployments, EC2 Auto Scaling to absorb traffic spikes without manual intervention, S3 for storage, Elasticsearch for fast search at scale. Keycloak SSO handled centralized authentication across all services. Kong API Gateway managed traffic routing.

All fifteen worked embedded inside the client's environment throughout. Talex managed the coordination and people side of the engagement, keeping a 15-person cross-functional team aligned across an 11-month build without the client having to carry that overhead.