Software Development Engineer in Test (SDET)

IDEXX•Westbrook, ME

23h

About The Position

IDEXX is looking for a skilled Software Development Engineer in Test (SDET) who is passionate about automated testing in a cloud-native, serverless environment to join our team focused on the payments industry. You will be responsible for ensuring the reliability, scalability, and security of our AWS serverless-based payment processing platform. As an SDET, you will design and implement test automation frameworks, validate AWS Lambda functions, API integrations, and DynamoDB operations, and contribute to a robust CI/CD pipeline. In this role: Test Automation & Framework Development Design, develop, and maintain automated test frameworks for serverless architectures. Implement API test automation for payment processing services. Automate functional, integration, security, and performance tests across AWS services (Lambda, API Gateway, DynamoDB, S3, SNS, SQS). AWS & Serverless Testing Develop event-driven test strategies for AWS Lambda-based applications. Write test cases to validate DynamoDB transactions, ensuring data consistency and scalability. Test serverless workflows involving Step Functions, EventBridge, and SQS/SNS messaging. Implement monitoring and validation checks using CloudWatch Logs, X-Ray, and AWS Config. CI/CD & Infrastructure as Code (IaC) Testing Integrate automated tests into CI/CD pipelines (Octopus Deploy). Work with developers to enable test automation in Infrastructure as Code (IaC) deployments (Terraform, CloudFormation). Ensure secure payment transactions by testing against PCI DSS compliance standards. Performance & Security Testing Conduct load and stress testing on payment APIs using k6 (preferred), JMeter or Gatling. Implement security testing to detect vulnerabilities in API endpoints and AWS resources. Work with DevOps and security teams to enforce least privilege access control and security best practices in AWS IAM roles. Design and engineer tools for creating simulated game-day outage events for reliability testing.

Requirements

Bachelor’s/Master’s degree in Computer Science, Engineering, or a related field.
5+ years of experience as an SDET, Test Automation Engineer, or QA Engineer in a cloud-based environment.
Strong programming skills in TypeScript (preferred), Python, or Java for test automation.
Hands-on experience with AWS services, particularly Lambda, API Gateway, DynamoDB, S3, SNS, SQS, Step Functions.
Experience in testing RESTful APIs and event-driven architectures.
Familiarity with serverless development frameworks (AWS SAM, Serverless Framework, or CDK).
Expertise in CI/CD pipelines, GitHub Actions, AWS CodePipeline, or similar.

Nice To Haves

Experience in testing APIs and WebSockets in payment processing.
Knowledge of AWS KMS for encryption and secure data handling.
Familiarity with contract testing (e.g., Pact for API compatibility).
Experience in synthetic monitoring and observability tools like Datadog, New Relic, AWS X-Ray.
Experience with testing tools like Playwright.
Understanding of payment industry standards (PCI DSS, EMV, tokenization, fraud prevention).

Responsibilities

Test Automation & Framework Development Design, develop, and maintain automated test frameworks for serverless architectures.
Implement API test automation for payment processing services.
Automate functional, integration, security, and performance tests across AWS services (Lambda, API Gateway, DynamoDB, S3, SNS, SQS).
AWS & Serverless Testing Develop event-driven test strategies for AWS Lambda-based applications.
Write test cases to validate DynamoDB transactions, ensuring data consistency and scalability.
Test serverless workflows involving Step Functions, EventBridge, and SQS/SNS messaging.
Implement monitoring and validation checks using CloudWatch Logs, X-Ray, and AWS Config.
CI/CD & Infrastructure as Code (IaC) Testing Integrate automated tests into CI/CD pipelines (Octopus Deploy).
Work with developers to enable test automation in Infrastructure as Code (IaC) deployments (Terraform, CloudFormation).
Ensure secure payment transactions by testing against PCI DSS compliance standards.
Performance & Security Testing Conduct load and stress testing on payment APIs using k6 (preferred), JMeter or Gatling.
Implement security testing to detect vulnerabilities in API endpoints and AWS resources.
Work with DevOps and security teams to enforce least privilege access control and security best practices in AWS IAM roles.
Design and engineer tools for creating simulated game-day outage events for reliability testing.