Alpaca · 2 days ago
Senior Engineer in Test - Applications
United States
Full-time
Remote
Senior Level
5+ years expAlpaca is a US-headquartered self-clearing broker-dealer and brokerage infrastructure for various financial services. The Senior Engineer in Test will be responsible for designing, developing, and executing comprehensive testing strategies for React/TypeScript applications and supporting backend services to ensure exceptional user experience and product quality.
Developer APIsFinancial ServicesFinTechTrading Platform
Responsibilities
Design, develop, and implement comprehensive test strategies for our React/TypeScript frontend applications and supporting services
Ensure strong coverage of functional and non-functional requirements in collaboration with Product Engineering teams
Define testing approaches for component, integration, and end-to-end user flows
Build, maintain, and evolve our automated testing frameworks using tools such as Playwright, React Testing Library, and Jest/Vitest
Establish patterns, utilities, fixtures, and best practices that scale across multiple teams and applications
Integrate automated testing into CI pipelines to ensure fast, reliable feedback loops
Develop robust automated E2E test suites for core user journeys, error paths, authentication flows, and complex UIs
Improve reliability, consistency, and speed of UI tests by refining mocking strategies, API stubbing, and data setup
Ensure cross-browser and cross-device test coverage when relevant
Implement and maintain API integration tests used by frontend applications
Collaborate with backend engineers to create and maintain contract tests for REST/gRPC when necessary
Validate frontend–backend interactions with a focus on user-facing behaviour rather than backend internals
Evaluate and implement new testing tools and technologies that improve developer experience and quality
Enhance CI build pipelines for frontend test execution, parallelization, and reporting
Optimize test reliability, flakiness detection, and runtime performance
Work closely with frontend and full-stack engineers to embed testing best practices into the development lifecycle
Participate in design reviews, grooming sessions, and architecture discussions to ensure quality considerations are addressed early
Advocate for a strong quality engineering culture across the organization
Mentor engineers in writing effective unit, integration, and E2E tests for React/TypeScript applications
Provide sample tests, pair-programming sessions, documentation, and workshops to help teams adopt the testing frameworks
Champion a mindset of continuous improvement
Qualification
Required
Strong proficiency in JavaScript/TypeScript and familiarity with modern React development
Hands-on experience with frontend testing tools such as Playwright (required), Jest or Vitest
Experience designing UI testing strategies for frontend architectures, including routing, state management, API mocking, and asynchronous flows
Experience with REST/gRPC API testing and contract validation (OpenAPI/Protobuf)
Strong understanding of CI/CD workflows (GitHub Actions, GitLab CI, etc.)
Familiarity with modern cloud environments (GCP, AWS, etc.) in the context of leveraging dev/test environments
Understanding of containerized development workflows (Docker), not as a primary responsibility but as a useful skill
Knowledge of web security basics including authentication (JWT/OAuth) and negative testing patterns
Familiarity with accessibility testing tools (e.g., axe-core) is a plus
Excellent analytical and problem-solving abilities with a strong attention to detail
Strong communication skills, with the ability to explain testing concepts clearly to both technical and non-technical audiences
Collaborative mindset with experience working in agile, cross-functional teams
Demonstrated leadership in testing practices and the ability to mentor team members effectively
Adaptability and comfort in fast-paced SaaS product environments
5+ years as an SDET, Frontend QA Engineer, or Quality Engineer with significant automation experience
Proven track record of testing and delivering high-quality web applications (preferably React/TypeScript) and SaaS products
Demonstrated experience designing and building automated test frameworks from the ground up
Bachelor's degree in Computer Science, Engineering, or related field, or equivalent practical experience
Benefits
Health Benefits
New Hire Home-Office Setup: One-time USD $500
Monthly Stipend: USD $150 per month via a Brex Card
Company
Alpaca
Alpaca is a financial system platform that allows developers and businesses to build apps, embed investing, and trade algorithms.
201-500 employees
H1B Sponsorship
Alpaca has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2020 (2)
Funding
Current Stage
Late StageTotal Funding
$328.8MKey Investors
Drive CapitalSBI GroupPortage Ventures
2026-01-14Series D· $150M
2026-01-14Debt Financing· $40M
2025-04-23Series C· $52M
Leadership Team
Yoshi Yokokawa
Co-Founder and CEO
Hitoshi Harada
CPO and Co-Founder
Recent News
Morningstar.com
2026-01-07
Company data provided by crunchbase