Senior SDET (Software Development Engineer in Test)

Rippling, Inc.; Austin (TX); Remote; USD 130,000 - 170,000; Full time

Job summary

Apex Trader Funding is seeking a Senior SDET to blend world-class software engineering with scalable automated testing. You will design and evolve automation frameworks, strengthen developer workflows, and enable the engineering org to deliver high‑quality software rapidly.

You’ll own testing ecosystems and drive improvement across UI, API, and distributed systems. Lead the development of testing infrastructure, mentor peers, and ensure telemetry and dashboards provide actionable insights.

Qualifications

• 5–8+ years in software testing/engineering with senior-level automation experience.
• Strong engineering background: TypeScript/Node.js, async patterns, SOLID principles.
• Strong API and network-level understanding.
• CI/CD experience with Docker and execution pipelines.
• Strong debugging skills across UI, API, and distributed systems.

Responsibilities

• Architect, build, and maintain Playwright-based automation frameworks using TypeScript/Node.js.
• Develop reusable fixtures, helpers, abstractions, and test infrastructure.
• Implement network mocking/stubbing, service virtualization, API layers, data factories, and contract testing.
• Build selector strategies, concurrency models, and fault‑tolerant automation. Integrate suites into CI/CD with parallelization, retries, flake analysis, and intelligent test selection.
• Own quality-related telemetry: traces, screenshots, logs, metrics.
• Build quality dashboards tracking stability, coverage, and reliability. Influence system design for testability.
• Build component, integration, and contract testing layers.
• Mentor QAEs, STEs, and developers on testing best practices.
• Document patterns, tools, and guidelines. Drive evolution of testing ecosystem.

Skills

TypeScript/Node.js

Async patterns

SOLID principles

API knowledge

Distributed systems

Debugging skills

Tools

Docker

Playwright

Grafana

Datadog

OpenTelemetry

Job description

Senior SDET (Software Development Engineer in Test)

Apex Trader Funding is a leading proprietary trading firm specializing in futures trading. As a fully remote company, we empower employees through innovation, transparency, accountability, and continuous growth. Our mission is to create opportunity by combining cutting-edge technology with a culture grounded in integrity, collaboration, operational excellence , and long-term success.

We believe great results come from diverse perspectives, clear expectations, and trust. At Apex, we encourage individuals to take ownership of their work while participating in a highly skilled, supportive, and results-driven team.

Our values, integrity, collaboration, operational excellence ,continuous growth, and attention to detail, guide how we work, make decisions, and deliver results.

GENERALSUMMARY

We’re looking for a Senior SDET who blends world-class software engineering skills with a passion for building scalable, reliable, and maintainable automated testing systems. In this role, you will design and evolve our automation frameworks, strengthen developer workflows, enhance CI/CD quality gates, and enable the engineering org to deliver high-quality software at speed. You’ll engineer the systems that make quality measurable, repeatable, and automated —not just test the product, but shape how the entire organization tests.

PRINCIPAL DUTIES & RESPONSIBILITES

• Architect, build, and maintain Playwright-based automation frameworks usingTypeScript/Node.js.
• Develop reusable fixtures, helpers, abstractions, and test infrastructure.
• Implement network mocking/stubbing, service virtualization, API layers, data factories,and contract testing.
• Build selector strategies, concurrency models, and fault‑tolerant automation.Integrate suites into CI/CD with parallelization, retries, flake analysis, and intelligenttest selection.
• Own quality-related telemetry: traces, screenshots, logs, metrics.
• Build quality dashboards tracking stability, coverage, and reliability.Influence system design for testability.
• Build component, integration, and contract testing layers.
• Mentor QAEs, STEs, and developers on testing best practices.
• Document patterns, tools, and guidelines.Drive evolution of testing ecosystem.

MINIMUM REQUIREMENTS

• 5–8+ years in software testing/engineering with senior-level automation experience.
• Strong engineering background: TypeScript/Node.js, async patterns, SOLID principles.
• Strong API and network-level understanding.
• CI/CD experience with Docker and execution pipelines.
• Strong debugging skills across UI, API, and distributed systems.

DESIRABLE

• Contract testing (Pact), schema validation, or service virtualization.
• Experience with observability systems (Grafana, Datadog, OpenTelemetry).
• Performance testing (Lighthouse, Playwright Tracing, k6).