DE building and optimizing enterprise and financial services applications using server-side technologies (Java, Spring, JUnit, Python, and JavaScript) and client-side technologies (HTML5, CSS3, Bootstrap, and jQuery); designing and implementing iOS application layers in Swift to support application presentation, client-side business logic, and interaction with backend services; performing database performance tuning for PostgreSQL and SQLite; troubleshooting HTTP-based integrations and system interactions using client URL (cURL), Postman, and HTTP Archive (HAR) files; and architecting highly available, multi-region AWS platforms using Application Load Balancer (ALB), Auto Scaling Group (ASG), Route 53, and CloudFormation. Skills and Knowledge : Candidate must also possess: Demonstrated Expertise (“DE”) designing, documenting, and publishing microservice-based Application Programming Interfaces (APIs) for internal and external consumption using Swagger and OpenAPI; defining REST API contracts with JavaScript Object Notation (JSON); and developing Simple Object Access Protocol (SOAP) API clients from service stubs and object models.