Backend Engineer

Job Description Position Title: Backend Engineer Position Description: Protingent Staffing has an exciting contract Backend Engineer opportunity located in Northridge, CA Job Responsibilities: • Design and implement REST APIs using Smithy models • Develop and maintain Coral Lambda Endpoint services using Kotlin/Java • Build and maintain Cognito Lambda triggers using TypeScript/Node.js • Implement authorization and authentication mechanisms • Develop policy management and tenant administration features • Work with AWS DynamoDB for data persistence • Implement secure authentication flows with Cognito • Design and maintain authorization policies using AWS Verified Permissions • Handle sensitive data with proper encryption and access controls Job Qualifications: • 5+ years of backend development experience • Strong proficiency in Kotlin/Java and TypeScript/Node.js • Experience with AWS serverless architecture (Lambda, API Gateway, Cognito) • Knowledge of infrastructure as code (CDK/CloudFormation) • Understanding of authentication/authorization patterns • Experience with REST API design and implementation • Tech Stack: • Main Service: Kotlin-based Coral Lambda service handling core user management • Cognito Lambdas: TypeScript Lambda triggers for user lifecycle events • CDK Infrastructure: TypeScript-based infrastructure definitions • Client Libraries: Java and TypeScript SDK generation • API Models: Smithy-based service definitions • Integration Tests: Kotlin-based comprehensive test suites Job Details: • Job Type: Contract • Location: Northridge, Los Angeles, CA (Fully Remote) • Pay Rate Range: $60-90/hr. • Must be U.S. citizens Benefits Package: Protingent offers competitive salaries, insurance plan options (HDHP plan or POS plan), education/certification reimbursement, pre-tax commuter benefits, Paid Time Off (PTO), and an administered 401k plan. About Protingent: Protingent is an Award-Winning provider of top-tier Engineering and IT talent, trusted by companies at the forefront of innovation — from Software and Aerospace to AI, Clean Tech, Medical Devices, and Connected Technologies. We’re passionate about making a positive impact by connecting exceptional talent with meaningful opportunities and helping our clients build the future.