Senior Software Engineer in Test

zipcolimited; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Zip is seeking an experienced Quality Engineer to own end-to-end verification and validation for cloud-native systems. You’ll design test strategies, build scalable automation, and work with engineers, product managers, and stakeholders to ensure quality is built in from design through production.

In this remote-first US-based role, you will lead edge-case testing, drive root cause analysis, and apply AI-assisted tools to accelerate testing and debugging across API, integration, and UI layers.

Qualifications

• 8+ years of experience in quality engineering, QA automation, or SDET roles.
• Strong ability to think critically and identify edge cases and subtle bugs.
• Deep understanding of testing strategies (unit, integration, E2E, contract, regression).

Responsibilities

• Design comprehensive test strategies with a focus on edge cases and real-world scenarios.
• Build and maintain robust automation frameworks across backend/API and frontend/UI testing.
• Drive root cause analysis and contribute to prevention strategies for defects and incidents.
• Mentor team members and elevate quality standards across the team.

Skills

QA Automation

SDET

TypeScript/JavaScript

Automation Frameworks

CI/CD

Edge Case Analysis

Tools

BrowserStack

Playwright

Cypress

Selenium

Appium

Job description

Own end-to-end quality verification and validation for complex systems, from design through production.

Help shape how verification and validation standards evolve as our engineering model matures.

Remote-first opportunity for US-based employees, with the option to work in person from our Manhattan office.

Start your adventure with Zip

Join Zip's Engineering team and put your name to solving fascinating quality challenges at scale in an agile, AI-forward development environment. If you bring a strong quality mindset, deep technical expertise, and a relentless curiosity to uncover edge cases and hidden defects, you'll be a great fit with the squads responsible for building cloud-native software applications that serve millions of customers and process billions of dollars in payments.

In this role, you will partner closely with engineers, design, product managers, and stakeholders to ensure quality is built in, not tested in. Your ability to design comprehensive test strategies, drive root cause analysis, and bring disciplined verification and validation to every release will be critical as Zip's verification & validation organization continues to take shape.

Interesting problems you'll get to solve

• Apply verification (confirming a system is built right; correct against spec, architecture, and code quality) and validation (confirming it's the right system, that it actually solves the business problem) to everything you test.
• Design and execute comprehensive test strategies with a strong focus on edge cases, failure modes, and real-world scenarios.
• Build and maintain robust, scalable automation frameworks across backend (API, integration testing) and frontend (UI, end-to-end testing).
• Identify gaps in test coverage and system behavior
• Drive root cause analysis and contribute to prevention strategies for defects and incidents.
• Leverage AI-assisted tools throughout the testing lifecycle to accelerate test design, strengthen debugging, and speed up technical problem-solving.
• Apply the same verification and validation rigor to AI- and agent-produced work as to human-written code, as engineering workflows continue to evolve
• Explore practical applications of emerging AI capabilities that improve quality engineering workflows, automate repetitive testing work, and strengthen release confidence.
• Continuously improve test efficiency, reliability, and execution speed.
• Mentor team members and elevate overall quality standards across the team.

What you'll bring to the team

• 8+ years of experience in quality engineering, QA automation, or SDET roles, with a proven track record of owning quality for complex, production systems.
• Strong ability to think critically and identify edge cases, failure scenarios, and subtle bugs.
• Deep understanding of testing strategies (unit, integration, E2E, contract, regression).
• Proven experience owning quality for complex production systems.
• Strong programming skills (preferably TypeScript, JavaScript, or similar).
• Experience building automation frameworks for backend/API testing and frontend/UI testing (e.g., BrowserStack, Playwright, Cypress, Selenium, Appium).
• Experience with CI/CD integration and test pipelines.
• Familiarity with mocking, stubbing, and test data management.
• Strong debugging and problem-solving skills, with the ability to understand system architecture and identify risk areas.
• A proactive mindset with a focus on prevention over detection.
• Proven experience leveraging AI-assisted development tools across testing, debugging, and technical problem-solving to improve software quality, team productivity, and delivery speed.
• Ability to evaluate and apply emerging AI capabilities to engineering workflows, using sound judgment to ensure quality, security, and maintainability.
• Strong drive to learn, adapt, and grow in a fast-paced environment, with the comfort to operate in ambiguity as the Verification & Release model continues to take shape.
• Takes ownership and accountability for outcomes, and is comfortable challenging assumptions and advocating for quality.
• Experience mentoring other engineers and raising quality standards across a team.
• Experience with performance testing, BDD frameworks, or microservices architectures is a plus.
• Experience working in high-scale or fintech environments is a plus.

Our values in your DNA: Customer First, Own It, Stronger Together and Change the Game.

What you'll get in return

Zip is a place where you'll get out what you put in. The newness of our sector means we need to move at pace and embrace change, and our promise to you when you join the team is that you'll feel empowered and trusted to make big things happen quickly.

We want you to feel welcome and as though you have the support to be yourself, and care for yourself at work. Because it's important to us that you make the most of the opportunities you'll get to grow your skills and your career, and be surrounded by smart, friendly people and leaders that