Automation Test Engineer - API & Integration

About Trideca

Trideca is Australia's trusted strategy, AI, and digital transformation partner - helping some of the nation's largest enterprises (including NAB, Suncorp, Optus, Medibank, and AGL) drive meaningful business impact through technology.

With offices in Melbourne and Sydney and projects spanning multiple industries, we thrive on solving complex challenges, delivering cutting-edge solutions, and pushing the boundaries of what's possible.

About the Role

Trideca is looking for a hands-on Automation Test Engineer to join a highly capable engineering team building enterprise integration solutions across platforms including Dynamics 365, Salesforce, SailPoint and Entra ID. This is not a UI-focused testing role — your work will centre on automating the validation of complex backend data flows, APIs, asynchronous messaging and file-based integrations.

The systems you'll test are built to be highly fault-tolerant and resilient: when something fails, processing must resume from the point of failure, not start over. A core part of this role is proving that resilience — deliberately simulating outages and failures across connected systems, and verifying the platform recovers exactly as designed.

What You'll Do

• Build automation frameworks: Design, build and maintain automated test frameworks for RESTful APIs, webhook ingestion and data synchronisation — using Playwright or Selenium with C#.
• Validate end-to-end data flows: Write automation to verify the four core integration patterns: file to API, API to API, API to file, and file-to-file transformations.
• API mocking: Stand up mocked endpoints (e.g. WireMock) so test suites run reliably in CI/CD pipelines without hitting live target environments — simulating successes, failures and duplicate rejections through data-driven mocks.
• Component & integration testing: Perform component and system integration testing across multi-system integration projects.
• Resilience & failure testing: Design and execute tests that deliberately take systems down mid-flow to validate fault-tolerance patterns — retries, circuit breakers, dead letter queues and resume-from-failure behaviour.
• Asynchronous & queue testing: Inject and validate messages through brokers such as Azure Service Bus, RabbitMQ or Kafka in event-driven architectures.
• Performance testing: Execute load and stress testing to verify memory management, CPU efficiency and behaviour under high volume.
• CI/CD integration: Integrate automated suites into YAML-based deployment pipelines for immediate feedback on every build.
• Manual support: Complement the team on manual and UAT testing during release cycles where needed.

What You'll Bring

• 5+ years' experience in automation testing / SDET roles with a strong focus on backend, API and integration testing.
• Hands-on automation experience with Playwright or Selenium using C# (essential). Strong JavaScript-based automation skills will also be considered.
• Solid experience with component testing and system integration testing on enterprise integration projects.
• Experience mocking and virtualising APIs (e.g. WireMock or similar) and running test suites inside CI/CD pipelines.
• Experience testing asynchronous, event-driven systems and message brokers (Azure Service Bus, RabbitMQ or Kafka).
• Scripting ability for file-based test scenarios — generating, dropping and validating files as part of automated flows.
• Exposure to performance, load and resilience/chaos testing approaches.
• Experience working within a .NET engineering environment is highly regarded.
• Working knowledge of YAML pipelines, cloud-native services and modern logging frameworks.

What We Offer

You'll join a structured, highly capable engineering team with a dedicated Technical Lead and Senior Developers. You'll have full ownership of the QA automation strategy, backed by a strong safety net for professional growth, mentoring and collaborative architectural planning

Why Choose Trideca?

Empowering Women in Technology: We are committed to closing the gender gap in technology. With our dedicated road map for women, you'll find tailored opportunities to advance your career, supported by mentorship, leadership programs, Women in Technology Chapter and inclusive policies like menstruation leave and flexible working options.

Growth Through Learning: Your growth is our priority. At Trideca, you'll have access to a wide range of learning and development initiatives, from certifications and workshops to personal development programs, ensuring you are always at the forefront of technology and innovation.

Work Your Way: Our flexible work policy supports you to balance your personal and professional life.

Trideca Values

Clients Come First

We obsess over our clients; they mean everything to us and are central to everything we do. We take the time to understand them, so we can deliver outstanding experiences and create moments of WOW

Achieve Greatness Together

Business is a team sport, and we are here to win. We respect, value, and inspire each other to bring our best to 'raise the bar.' We will high-five you when you've nailed it and have honest discussions when you don't.

We Celebrate Our Differences

We are stronger and more successful when we include and appreciate different backgrounds, ideas, and experiences. Diversity helps us be more creative, solve problems better, and achieve more. By valuing everyone's unique contributions, we create a cohesive workplace where everyone can thrive and grow

Own Your Space

We own our space, relationships, and client outcomes. We are fully committed and accountable to ourselves and each other; we deliver what we commit to. We adopt a commercial outlook and expect everyone to think and make decisions like we are the CEO.

Debate, Agree, Commit

We champion open dialogue where every voice matters and ideas are rigorously challenged to create stronger solutions. Once we reach alignment, we commit fully as one team and execute with excellence and accountability.

Have Fun, Go Nuts

No explanation is required, have fun go nuts

We also believe that the unique contributions of everyone at Trideca is the driver of our success. To ensure that our products and culture continue to embrace everyone's perspectives and experiences, we never discriminate based on race, religion, national origin, gender identity or expression, sexual orientation, age, marital status, veteran status, or disability. We are passionate about creating a workplace that fosters active participation and provides an equal playing field, where merit and accomplishment are the sole criteria for success. We encourage candidates from all backgrounds to apply. We celebrate the diversity of our workforce and are dedicated to creating an environment where everyone feels welcome, valued, and included.