About FullStack

FullStack is your AI-native engineering partner, built to turn AI capability into certainty. Most companies can demo AI; few can get it to production and prove what it produced. We close that gap with three capabilities, AI built into your products from the start, elite vetted talent who apply it, and transparent execution that shows value every step of the way. With now over 600 customers in North America, FullStack is one integrated partner for all your AI engineering needs. With FullStack, you move forward with confidence.

We’re Most Proud Of

• Offering life-changing career opportunities to talented software professionals across the Americas.
• Building highly-skilled software development teams for hundreds of the world’s greatest companies.
• Having delivered hundreds of successful custom software solutions, which have positively impacted the lives and careers of millions of users.
• Our 4.1-star rating on GlassDoor.
• Our client Net Promoter Score of 68, twice the industry average.

The Opportunity

Join our talent network and connect with U.S. clients for flexible, project-based development work as a Manual QA Specialist.

You will integrate directly into our client's team and work alongside their existing designers and engineers on a daily basis.

What We're Looking For

• 4+ years of professional Manual QA testing experience.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Strong experience with functional testing, including positive, negative, regression, and end-to-end scenarios.
• Demonstrated experience creating and executing detailed test cases based on functional and business requirements.
• Hands-on experience validating APIs and understanding basic backend request/response behavior.
• Experience using browser Developer Tools, including DOM inspection, Network tools, and Console.
• Ability to identify failing API requests, unexpected responses, status codes, and other technical indicators when diagnosing defects.
• Experience using Swagger/OpenAPI or similar tools to understand and validate API endpoints.
• Strong troubleshooting and debugging skills sufficient to provide developers with meaningful technical context.
• Experience validating data accuracy across application interfaces, APIs, databases, reports, or other data-driven systems.
• Ability to perform end-to-end testing across interconnected applications and workflows.
• Strong defect-reporting skills, including clear reproduction steps, expected versus actual results, severity, evidence, and relevant technical findings.
• Experience performing regression and retesting activities following application changes and defect fixes.
• Ability to work through new and difficult issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of applications.
• Forensic attention to detail.
• A positive mindset and a can-do attitude.
• Experience working on Agile / Scrum teams.
• Meaningful experience working on large, complex systems.
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon.
• Ability to identify with the goals of FullStack's clients, and dedicate yourself to delivering on the commitments you and your team make to them.