Top Software Test Engineer Jobs in San Francisco, CA

Build automated test infrastructure for connected devices, integrate hardware testing into CI, design simulation and integration coverage, investigate software and hardware failures, and improve device-software reliability using Python and C++. Collaborate with firmware, systems, cloud, and mobile engineers while developing repeatable workflows and regression tests for release readiness.

Own end-to-end verification and validation for complex cloud-native software systems. Design comprehensive testing strategies, build scalable backend and frontend automation frameworks, identify coverage gaps, perform root cause analysis, integrate tests into CI/CD pipelines, and improve testing efficiency. Apply AI-assisted tools to testing and debugging, evaluate emerging AI capabilities, mentor engineers, and raise quality standards across teams.

Owns VM and fleet test strategy, performance quality gates, and hypervisor validation for an IaaS platform. Designs reproducible bare-metal-like test environments, develops automated performance benchmarks and regression gates, validates SLOs and deployment safety, and builds test harnesses and analysis pipelines in Go, Python, and Perl. The role requires deep expertise in virtualization, Linux systems, performance engineering, statistical analysis, and cross-architecture debugging.

Designs and maintains automated testing frameworks for AI-powered applications, APIs, backend services, and distributed systems. Defines test strategies, acceptance criteria, evaluation metrics, tolerances, and quality gates for deterministic and non-deterministic software. Builds regression, integration, API, and end-to-end coverage; evaluates LLMs, agents, prompts, and tool-calling workflows; integrates testing into CI/CD; analyzes failures, telemetry, and logs; reduces flaky tests; and partners with AI, engineering, and product teams on continuous quality practices.

Build production-grade test automation infrastructure across API, integration, end-to-end, contract, regression, load, and performance testing. Develop Playwright suites, integrate automated tests with GitHub Actions release gates, create AI-assisted test generation workflows, maintain coverage dashboards, reduce flakiness, and establish performance-testing frameworks. Partner with engineers and product managers to define coverage, acceptance criteria, performance thresholds, and quality standards across the organization.

Designs and executes end-to-end manual and automated tests for Oura’s mobile apps, cloud services, wearable devices, data flows, and algorithms. Builds and maintains mobile and API automation frameworks, integrates testing into CI/CD pipelines, validates sensor-driven insights and wireless connectivity, investigates defects, and improves QA processes. The role also owns test strategy, documentation, quality metrics, performance testing, AI-driven testing exploration, and mentorship of junior engineers.

Designs, develops, and maintains automated test frameworks and suites for native Android applications. Integrates mobile testing into CI/CD pipelines, executes tests across emulators and physical devices, investigates failures, improves application testability, and validates behavior across Android versions and device configurations. Collaborates with Android Engineering, QA, and Product teams while contributing to automation architecture, tooling standards, and testing best practices.

Build and maintain automated test frameworks and suites for native iOS and Android applications. Integrate mobile automation into CI/CD pipelines, execute tests across simulators, emulators, and physical devices, investigate failures, improve testability and coverage, and contribute to automation architecture and testing standards. Collaborate with Mobile Engineering, QA, and Product teams while using AI-assisted tools to improve development, debugging, analysis, documentation, and workflow efficiency.

Design and build software architecture, test infrastructure, and reusable tooling for satellite vehicle integration and hardware validation. Integrate flight and ground software, refine electrical engineering specifications, support testing from proposal through flight, troubleshoot production issues through on-call rotations, and mentor junior engineers. The role involves hands-on lab work across vehicle subsystems and participation in recruiting and hiring.

Design and implement software architecture, test infrastructure, and reusable tooling for aerospace vehicle integration and hardware validation. Integrate flight and ground software, refine electrical engineering specifications, support testing from proposal through flight, troubleshoot production and flight issues, and guide major test campaigns. Mentor junior engineers and support recruiting. The role involves hands-on laboratory work, on-call support, and collaboration across engineering teams for commercial and U.S. Government programs.

Build and maintain automated test frameworks and CI pipelines, automate UI, services, runtimes and browser testing, manage Jenkins jobs, expand automation coverage, work with global console teams, maintain Python automation frameworks, and report and verify defects.

Own the enterprise test automation strategy, scale a Playwright and JavaScript framework, expand coverage across Salesforce, MuleSoft, D365, and reporting systems, and build scalable execution and reporting infrastructure. Design QA standards, metrics, and review processes while developing AI-powered agents with Cursor for performance testing, regression analysis, and defect triage. Partner with engineering, product, business, and AI platform teams to deliver governed, reusable quality tooling.

Lead technical ownership of a global platform for safe change: distributed key-value storage, progressive configuration delivery, testing and health-mediation. Write production code, design systems, review senior proposals, integrate LLMs, and drive cross-team initiatives to improve reliability, rollout safety, and developer productivity.

Develop and run automated test frameworks and embedded firmware to validate radar payloads. Build HIL setups, control lab instruments, analyze performance data, and maintain CI pipelines to ensure hardware-software integration and space-readiness.

Build and maintain automated tests for a browser-based 3D CAD platform, expanding coverage across CAD workflows, data uploads, and exports. Evolve test infrastructure and CI, improve reliability and execution speed, eliminate flaky tests, and create debugging tools for coding agents. Partner with platform engineers to improve application testability and help teams write durable tests. The role also includes performance regression tracking and root-cause analysis across application code and infrastructure.

Execute scheduled, ad hoc, and release-milestone software tests; review test cases; report defects in issue-tracking systems; communicate status in standups; and collaborate with software test managers and development teams. The role requires knowledge of QA methodologies, black-box, grey-box, and white-box testing, strong communication and organization, independent and team-based work, and participation in planning and professional meetings.

Develop and maintain automated testing tools and frameworks for complex healthcare software. Create test plans, execute white-box, black-box, UI, API, and performance testing, identify defects and testing gaps, improve CI/CD processes, and collaborate with product managers and developers to support high-quality releases. The role also involves debugging code, participating in demos, and working with distributed teams in a remote environment.

Designs, develops, and maintains complex software test automation frameworks, tools, libraries, and performance tests. Integrates automated testing into CI/CD pipelines, analyzes test results, enforces coding standards, reviews code, troubleshoots issues, and mentors junior engineers. Collaborates cross-functionally to support quality releases and develops reusable testing solutions using modern programming languages, cloud platforms, containerization, API testing, and automation technologies.

Design and build automated test fixtures and software (Python, Rust/C) for qualification and production. Drive design-for-testability, perform cross-domain debugging (mechanical, electrical, software), run reliability/qualification rigs, and own failure analysis and production testing to ensure units meet specs.

Lead initiatives that enable production-like system testing across engineering. Build realistic test environments, workload generation and replay, fault-injection tooling, shared testing frameworks, and continuous or release validation. Partner with infrastructure, reliability, release, and product teams to convert incident learnings into durable test coverage. Mentor engineers, influence testing strategy, and improve observability, debuggability, and operational readiness.

Build and maintain scalable integration and end-to-end test automation frameworks, optimize CI pipelines and test execution, improve test stability and reporting, support engineering teams with triage and best practices, write technical specs/ADRs, participate in on-call rotation, and collaborate cross-functionally to evolve the company test strategy.

The Software Test Engineer will design and execute software test procedures for spacecraft Flight Software across integration and environmental tests, ensuring features are testable and validated before launch.

Lead design and operation of test infrastructure at scale: test orchestration, smart selection, parallel sharding, flaky-test detection, observability, SLOs, and on-call. Define technical strategy, drive cross-team projects, mentor engineers, and reduce test feedback time to accelerate engineering velocity.

Design, develop, and deploy automation-centric test software and assets to validate avionics, sensors, and assemblies from prototype through production. Own test campaigns, coordinate cross-functional teams and vendors, triage field failures, root-cause issues, and build visualization and data-acquisition tools to streamline manufacturing and safety-critical validation.

Build and maintain HIL test infrastructure and large-scale automated validation tools integrating real aircraft hardware with simulation. Support thousands of flight tests daily by writing test software, drivers, and interfaces for embedded and Linux systems, improving test reliability, debugging cross-stack failures, and collaborating with avionics, autonomy, and systems teams.