Software Developent Engineer in Test (SDET)

Join Vonage and help us innovate cloud communications for businesses worldwide! Vonage's Applications: Our Applications business unit focuses on delivering a suite of advanced communication tools designed to enhance customer engagement. From cloud contact centers to feature-rich unified communications solutions, our Applications team is dedicated to providing businesses with the tools they need to streamline operations and improve customer experiences. Why this role matters: Vonage is looking for a hands-on SDET (Mid–Senior Level) to strengthen automation engineering across our modern microservices-based communications platform. This role is deeply technical and delivery-focused. You will design and implement scalable automation solutions across UI, API, performance, and mobile layers, ensuring quality is embedded throughout the SDLC. As part of the QA Centre of Excellence (QA COE), you will collaborate with engineering squads to build reliable, CI/CD-ready automation frameworks and promote best practices in BDD, microservices testing, and observability. Your key responsibilities: Automation Engineering Design, develop, and maintain scalable test automation frameworks. Build UI automation using Playwright (TypeScript). Implement BDD practices using Cucumber/Gherkin. Generate structured reporting and living documentation using Serenity. Develop robust API automation for REST and GraphQL services. Contribute to mobile automation using Appium (Android/iOS). Ensure test frameworks are modular, maintainable, and optimised for parallel execution. Integrate automation into CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI, CircleCI, or internal tools). Microservices & API Quality Validate distributed systems across a microservices architecture. Implement: contract testing, schema validation, authentication/authorization testing and resilience/failure scenarios Contribute to SLA/SLO validation and service-level reliability checks. Collaborate with engineers to improve testability and observability. Performance & Reliability Develop and maintain performance and load tests using K6 (TypeScript). Integrate performance testing into CI/CD pipelines. Analyse performance metrics using: Grafana, Prometheus, AWS CloudWatch Datadog Partner with SRE and Platform teams to identify performance bottlenecks and reliability risks Collaboration & Continuous Improvement Actively participate in Agile ceremonies. Work closely with Developers, DevOps, Product Owners, and Release teams. Maintain documentation in Confluence and track work in Jira. Provide visibility through Serenity reports and CI dashboards. Contribute to evolving QA engineering standards within the QA COE. What you'll bring Required: 5–8 years of experience in automation engineering or SDET roles. Strong hands-on experience with: Playwright (TypeScript), API automation (REST/GraphQL) and BDD frameworks (Cucumber/Gherkin) Experience working within AWS-based environments. Strong understanding of distributed systems, microservices testing. Experience integrating automation into CI/CD pipelines. Working knowledge of performance testing with K6. Strong coding, debugging, and analytical skills. Experience collaborating within cross-functional Agile teams. Experience we consider a plus: Experience with Docker, Kubernetes, or EKS. Familiarity with contract testing tools. Exposure to telecom or communications platforms. Mobile automation experience with Appium. Experience contributing to shared, cross-team automation frameworks. How you’ll benefit: Discretionary Time Off Private Medical Healthcare Pension scheme Ericsson support line Hybrid work Additional benefits and perks will be shared and discussed with you by the recruiter during the interview process #LI-KS There’s no perfect candidate. You don't need all the preferred qualifications to make a valuable impact on our team. Our employees and customers come from diverse backgrounds, so if you're passionate about what you could achieve at Vonage, we'd love to hear from you. To learn how we process your personal data during the recruitment process, please refer to our Privacy Notice. Who we are: Vonage is a global cloud communications leader. And your talent will further help brands - such as Airbnb, Viber, WhatsApp, and Snapchat - accelerate their digital transformation through our fully programmable-based unified communications, contact center solutions, and communications APIs. Ready to innovate? Then join us today. Note: The purpose of this profile is to provide a general summary of essential responsibilities for the position and is not meant as an exhaustive list. Assignments may differ for individuals within the same role based on business conditions, departmental need or geographic location.