QA Engineer

About CUBE AI

CUBE AI is an Agentic Crime Prevention Platform, built at the intersection of agentic AI, cybersecurity, and fraud prevention. We serve the institutions on the front line of an exploding wave of AI-powered crime: banks, fintechs, and the platforms criminals cannot operate without. Our mission is ambitious: make the world a safer place. How we do it is the part we're most excited about, and the part we're happy to walk you through in a conversation rather than on the open internet.

Why this is the seat to take

This is a rare seat on a rocket ship. CUBE AI is early, exceptionally ambitious, and backed by some of the world's leading investors. Our founders have built and scaled startups to unicorn valuations and exits, and have run mega teams at mega companies. We are building the company that puts the institutions the modern economy runs on back on offense against AI-powered crime. The closest analogy is joining Palantir in its early days: a hard mission, a category we're defining rather than entering, and a small group of exceptional people compounding fast. If you want a comfortable role, this isn't it. If you want the defining chapter of your career, your best work alongside people who make you sharper, keep reading.

The role

We build the technology that detects and dismantles fraud and financial-crime campaigns in real time. As a Quality Assurance Engineer, you will help with raising the quality of the development of both the backend and the frontend that powers it. You will help shape both the product and the architecture as we scale. This is a high-impact seat: you will work shoulder to shoulder with the developers, researchers, and engineers to turn frontier research into production systems that hold up under real-world load.

What you'll do

• Collaborate across the team — Work closely with engineers, product managers, and designers from refinement through release, surfacing ambiguity in requirements before it becomes a bug.
• Manual feature testing — Take new features from ticket to sign-off: review requirements and acceptance criteria, design test cases that cover happy paths, edge cases, and error states, then execute them across supported environments. Report defects with clear reproduction steps, expected vs. actual behaviour, and supporting evidence.
• Regression testing — Run and maintain the regression suite, making sure new work doesn't break existing functionality before it’s released to production. Keep the suite current as the product evolves, prune tests that no longer earn their place, and prioritise coverage by risk and business impact.
• Smoke testing — Run fast sanity checks on every deployment to production to confirm new features as well as critical paths are healthy and raise the flag early if a build isn't stable enough to keep in production.

What we're looking for

The bar (non-negotiable, every role):

• Extreme drive and passion for the work and the mission.
• Extreme ability to learn fast and operate with confidence in uncertainty.
• Extreme IQ and EQ. You raise the level of every room, and you lose an argument gracefully the moment someone's right.

For this role specifically:

• At least 3+ years of experience in manual software testing (API & WEB field)
• Interest in both Manual Testing and Test Automation.
• Experience in Web E2E testing.
• Experience in BE & API testing.
• Experience with manual API testing tools (Postman, Insomnia, or similar)
• Experience with Databases (MongoDB, MySQL or similar)
• Familiarity with CI/CD tools (Jenkins, Gitlab, GitHub Actions, etc)
• Understanding of test design and testing techniques.
• Familiarity with Atlassian tools JIRA/Confluence.
• Experience working within cross-functional scrum teams.
• Ability to work alone as well as working hand in hand and effectively communicating within the cross-functional scrum teams.
• Written and spoken English skills.

How we work and who thrives here

Our core locations are Lithuania, London, and New York, and we consider remote-first candidates who can travel as needed for their role. We write more than we meet and move at warp speed. We're an AI-first company: every person here is amplified by a layer of AI agents, and we scale capability, not headcount. We don't buy services, we buy results. We're drivers, not passengers, so we hire people who go and do it without waiting for permission. We move fast, and we use judgment where it counts: we hold sensitive data and the trust of the institutions we protect, and we never cut corners there. Our culture runs on five virtues:

• A pedantic bar for quality. Work that is thorough, complete, and on time. We trust each other to deliver, fully.
• Radical ownership. See it, own it, fix it. Never defer a problem or an opportunity. You will never be reprimanded for taking initiative.
• Relentless energy and audacity. Building something exceptional demands enormous energy. We move forward with maximum drive.
• Automate everything. We scale the capability of our people, not the headcount. We always hunt the 10x multiplier, working alongside AI agents rather than piling on process.
• Have fun. We work with people we genuinely enjoy. It gets us through the hard stretches and keeps politics out.

What's in it for you

• Uncapped growth. In a company moving this fast, scope finds the people who can carry it. Ownership and title are earned in months, not years.
• Real self-realization. This is a place to become the most capable version of yourself, next to people operating at the top of their game.
• A direct line to senior product and engineering leaders, and a real say in where the product goes.
• You share in the outcome. When the company wins big, you win big.

What we offer

Join a rocket ship. Let's discuss compensation and the rest of the details on our call.

CUBE AI is an equal-opportunity employer. We welcome applicants of every background and will support any accommodations you need during the hiring process