Sr. Software Engineer : Mastercard

Interview : Video + F2FVisa : USC, GCThis is hybrid from day-1Role 1 )Sr. Java DeveloperRate : 50-55Extensive knowledge and experience with Java, Spring Boot, gRPCGood knowledge in creation and working with CI/CD pipelines using JenkinsExperienced in event driven systems (ActiveMQ, Apache Kafka, NATS, etc)Experience in financial system encryption (PIN Blocks, CHIP, CVC) would be beneficialExperience with testing frameworks and methodologies (Gtest, JUnit, BlazeMeter, mocking, etc.)Experienced in building platforms with Microservice architecture and RESTful APIs.Experience using cloud-native approaches running on Linux, leveraging Spring BootExposure to symmetric cryptography would be desired.Experience with virtualization like Cloud Foundry (PCF), Kubernetes (EKS), Docker etc. Role 2 ) Lead Java Developer Rate : $60-65 ( buying ) Responsible for identifying and resolving end-to-end performance bottlenecks across distributed systems, Spring Boot services, middleware components, and hybrid cloud environments (private cloud + AWS). This role goes far beyond traditional testing by deeply analyzing container orchestration, networking paths, and system interactions under load. This position maps full system workflows, sets realistic latency budgets, and ensures each component meets its SLOs. Ideal candidates have extensive experience with high-scale, multi-region, and high-transaction platforms (e.g., financial systems, payment processing, or large enterprise SaaS) running in a Cloud environment. Key ResponsibilitiesDefine service-level objectives (SLOs), performance budgets, and latency/throughput targets across services.Architect and champion comprehensive distributed tracing strategies (Dynatrace, AWS X-Ray, etc.).Analyze application, platform, and cloud behavior using deep-dive techniques such as heap dumps, thread dumps, flame graphs, GC logs, network traces, and storage I/O profiling.Review service and system architectures for performance risks (e.g., synchronous hops, excessive dependencies, misconfigured connection pools, poor cache placement).Conduct and lead root-cause analysis for performance incidents in production and pre-production environments.Develop capacity models and performance baselines for services running across cloud environments. Areas of ExpertiseApplication Layer: Spring Boot internals, JVM tuning, thread/heap management, concurrency debugging, GC optimizationContainer Runtime: PCF, Docker, container resource limits, CPU throttling, memory pressureOrchestrators: PCF, Kubernetes, ECS (autoscaling, pod health, scheduling issues)Networking: Service-to-service hops, TLS overhead, DNS, routing, load balancer configs (F5, Nginx, ALB/NLB), service mesh performanceStorage: Latency, IOPS constraints, distributed file system behaviorCaching & Middleware: Redis, Hazelcast, NATS, Kafka, RabbitMQ configuration and throughput tuningDatabases: Connection pool tuning, slow queries, indexing, replication lagCloud Layer: AWS compute/storage/network performance, regional latency, cross-cloud traffic patterns