Senior Software Development Engineer in Test

Senior Software Development Engineer in Test

About Mimecast

Mimecast is a global leader in cybersecurity, dedicated to protecting more than 42000 customers from the escalating landscape of digital threats. Mimecast has transitioned from traditional email security to unified Human Risk Management platform, designed to secure the modern collaborative workspace – spanning Email, Slack, Microsoft Teams and beyond. By integrating advanced AI-powered detection with deep behavioural insights, Mimecast identifies and mitigates risks as the “human layer”, where technology and user behaviour intersect.

Why Join Our Team?

Are you passionate about building robust, scalable systems that make a real impact? At Governance, Compliance & Insights, you’ll join a collaborative team tackling the unique challenges of enterprise data back-up & recovery. Here, your ideas matter, your code shapes the future, and your work directly improves how global businesses safeguard their most valuable assets.
 

Mimecast is an AI-First engineering organization. Our teams actively leverage AI-powered development tools across all facets of engineering, from code development to testing, documentation, and operations.
 

What You’ll Do

As a full-stack Senior SDET with a specialization in backend systems, you will play a pivotal role within the GCI team, collaborating closely with Engineers to enhance the development and quality of our products. Your contributions will directly influence the expansion of testing and automation across multiple facets of the business.

In this role, you will:

• Design and Implement Automation Frameworks: Build and continuously improve scalable, reusable backend automation test frameworks to support multiple services.
• Own Backend and API Automation: Ensure comprehensive end-to-end automation coverage for backend systems, APIs, and service-level interactions, validating data flows and service integrations.
• Extend UI Automation: Maintain and expand UI automation for customer-facing workflows to ensure seamless user experiences.
• Collaborate Across Teams: Actively participate in backlog grooming, sprint planning, design reviews, and code reviews to ensure quality is embedded throughout the development lifecycle.
• Investigate and Resolve Failures: Analyze complex failures across distributed systems, perform root cause analysis, and provide actionable recommendations for fixes.
• Proactively Identify Risks: Challenge assumptions, identify systemic quality risks, and advocate for improvements to ensure robust and reliable systems.
• Own Test Strategy: Take full ownership of the squad’s test strategy, ensuring comprehensive coverage and driving continuous improvement initiatives.
• Performance and Load Testing: Define and execute performance and load tests to validate system behaviour under concurrent load and ensure scalability.
   

What You’ll Bring

• Extensive Experience: 9+ years of expertise in backend, frontend, and functional testing, with a proven track record of delivering high-quality results.
• Technical Proficiency: Strong command of Java and Maven, including experience with multi-module backend test automation frameworks.
• API and Service Testing: Hands-on experience with REST API testing, including contract validation, status codes, authentication flows, error handling, and ensuring cross-service data consistency.
• Testing Frameworks: Proficient in JUnit 5 and REST Assured for building robust API and integration test suites with lifecycle management and tagging.
• Performance Testing: Skilled in using K6 for performance and load testing to ensure system reliability under varying workloads.
• End-to-End Testing: Expertise in achieving comprehensive coverage across full user workflows, multiple services, and diverse environments.
• Data-Driven Testing: Experience with JSON-driven, parameterized testing scenarios from external files to maximize coverage while minimizing code duplication.
• Cloud Expertise: Familiarity with AWS, including database validation, retry patterns for eventual consistency, and artifact storage.
• CI/CD Pipelines: Proficient in Jenkins and GitLab CI/CD for pipeline creation and maintenance, parallel test execution across environments, scheduled regression testing, and generating HTML reports.
• E2E Automation: Advanced knowledge of Playwright and TypeScript for cross-browser end-to-end testing, leveraging page object models for maintainable and scalable test automation.
• AI-Driven Tools: Demonstrated proficiency with AI-assisted development tools (e.g., Cursor) to enhance productivity and streamline workflows.
   

What We Bring

• Mimecast offers an attractive compensation package for the right candidate, including base salary and performance bonus.
• Mimecast also offers formal and on-the-job learning opportunities, maintains a comprehensive benefits package, and fosters a culture that celebrates achievement. We believe in growth that’s good, a culture that cares, and a mission that matters.
   

Our Hybrid Model

We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to that office at least 2 days per week, because working together in person:

• Fosters a culture of collaboration, communication, performance and learning.
• Drives innovation and creativity within and between teams
• Introduces employees to prioritises outside of their immediate realm.
• Ensures important interpersonal relationships and connections with one another and our community!
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Belonging at Mimecast

Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course.

We’re proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.

We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.

Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.