A major US airline embarked on a large scale modernization initiative to transform its customer facing digital channels and personalization applications. Built on the classic .NET framework and hosted on on premises infrastructure, the legacy platforms struggled with high technical debt, frequent downtime, limited scalability, and rising operational costs—hindering the airline’s ability to support rapid user growth and deliver seamless customer experiences.
Infosys partnered with the airline to modernize the application landscape by transitioning to a cloud native .NET Core ecosystem on AWS. The initiative involved re architecting monolithic ASP.NET applications into microservices, modernizing front end experiences using React, and migrating workloads from on premises Windows servers to AWS. Databases were also modernized, moving from SQL Server and Couchbase to Amazon Aurora and Amazon ElastiCache for Redis.
The modernization covered end to end customer journeys—including flight search, booking, seat selection, travel readiness, check in, inflight, and post flight engagement—serving 744K daily users and over 20 million registered users. The resulting platform delivers higher availability, faster response times, improved disaster recovery, and significant cost savings, enabling the airline to scale reliably while delivering personalized, high performance digital experiences.
80-90%
Service availability improvement
50-60%
Faster peak response
90%
Faster disaster recovery
80-85%
Infrastructure cost reduction
90%
CPU & memory optimization
40-45%
Operational overhead reduction
Key Challenges
- High technical debt, causing latency and memory inefficiencies
- Frequent downtime due to infrastructure maintenance
- Monolithic architecture amplifying impact of minor failures
- Inability to scale to support 30% YoY user growth
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Infosys Approach
- Modernized customer facing digital channels and personalization applications
- Re architected monolithic ASP.NET applications into .NET Core microservices
- Deployed workloads on AWS Fargate for serverless container management
- Migrated databases to Amazon Aurora and Amazon ElastiCache for Redis
- Implemented Amazon SQS and Amazon SNS for resilient messaging
- Established multi region DR with automated failover and blue green deployments
- Integrated enterprise API gateway, TLS, and centralized observability
- Executed phased traffic migration using Global Traffic Manager (GTM)
- Aligned architecture with the AWS Well Architected Framework
The Solution
Modernizing Microsoft workloads to deliver scalable, secure, cloud native airline experiences
Infosys delivered a structured modernization and cloud migration solution that transformed the airline’s legacy digital platforms into a scalable, microservices based ecosystem on AWS. ASP.NET monoliths were decomposed into domain driven .NET Core microservices and deployed on Amazon ECS using AWS Fargate for simplified operations.
A phased migration strategy ensured minimal disruption while progressively shifting production traffic to the cloud. AWS services—including Amazon Aurora, Amazon ElastiCache for Redis, Amazon SQS, Amazon SNS, and Service Connect—enabled high performance interservice communication, resilience, and scalability. Security, authentication, logging, and monitoring were standardized using enterprise grade integrations.
The modernized platform supports personalized customer experiences at scale, delivers faster releases, and provides the airline with a resilient digital foundation capable of handling peak demand and future growth.
Business Outcomes
Achieved 80–90% improvement in service uptime through enhanced availability
Delivered 50–60% faster response times during peak loads
Enabled up to 90% faster disaster recovery through automated failover
Realized 80–85% infrastructure cost savings via pay as you use scaling
Optimized CPU and memory utilization by up to 90%
Reduced operational overhead by 40–50%
Benefits
Improved efficiency, resilience, and agility through cloud automation, optimized resource usage, and modern deployment practices.
- Strengthened service reliability through fault tolerant, multi region architecture
- Faster customer experiences with improved system responsiveness
- Reduced infrastructure costs via consumption based cloud model
- Optimized resource utilization across normal and peak workloads
- Faster recovery and business continuity during disruptions
- Improved productivity through reduced operational overhead
