Senior QA Engineer

The Leaflet

Senior Manual QA Engineer ensuring reliable player experiences across web, mobile, API, and backend systems. Responsible for testing and quality assurance in a fast-paced environment.

Posted 5/15/2026full-timeRemote • Florida • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

SDLCSQL

About the role

Key responsibilities & impact

Participate in all stages of the SDLC to ensure product quality and release readiness
Review product and technical requirements to develop effective test strategies and coverage
Design, maintain, and execute test plans, test cases, and exploratory testing strategies across web, mobile, API, and backend systems
Conduct regression, integration, system, and end-to-end testing for critical player-facing features
Identify, document, track, and help troubleshoot defects through resolution
Assess release risk and provide QA recommendations for complex features and customer journeys
Partner with Engineering and Product teams to identify risks early and improve quality throughout development
Use tools such as Postman, Swagger, DevTools, Charles Proxy, Proxyman, and emulators to validate functionality and investigate issues
Validate backend integrations and data consistency using SQL queries and debugging tools
Use AI-assisted tools to improve test coverage, accelerate defect investigation, and increase QA efficiency
Mentor junior and mid-level QA engineers on testing best practices and debugging techniques
Take ownership of testing strategy and execution for complex features and initiatives
Contribute to continuous improvement of QA processes, tooling, and test coverage

Requirements

What you’ll need

5+ years of experience in software quality assurance with a strong focus on manual testing
Strong experience testing web and mobile applications in complex production environments
Solid understanding of SDLC, STLC, and QA best practices
Experience testing APIs using tools such as Postman or Swagger
Strong troubleshooting and debugging skills across frontend and backend systems
Experience with tools such as DevTools, Charles Proxy, Proxyman, and emulators
Familiarity with databases and ability to write SQL queries for validation and troubleshooting
Demonstrated experience integrating AI-assisted tools into QA workflows, test design, debugging, or defect analysis
Ability to work independently, prioritise effectively, and take ownership of testing efforts
Strong communication and collaboration skills within cross-functional Agile teams

Benefits

Comp & perks

Competitive pay and benefits
Flexible vacation allowance
A hybrid / remote working environment
Startup culture backed by a secure, global brand

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

manual testingAPI testingSQL queriesregression testingintegration testingsystem testingend-to-end testingexploratory testingtest planstest cases

Soft Skills

troubleshootingdebuggingcommunicationcollaborationownershipprioritizationmentoringindependencecontinuous improvementrisk assessment