Quality Engineer

Join Lleverage.ai and Help Build the Future of AI Automation

Hey there! We're Lleverage.ai, and we're making AI automation actually achievable for businesses. We enable teams to capture, automate, and integrate AI-driven workflows and agents into their business, because AI is only useful when it actually fits into daily operations.

We help established industries – manufacturing, logistics, and wholesale – automate the messy, manual processes that most tools can't handle. From order and invoice processing to ERP integrations, our AI-powered platform gives businesses back their time and boosts profitability.

We're a fast-growing, VC-backed scale-up based in Amsterdam, with big ambitions for 2025 and beyond. This is your chance to join early, have real impact, and grow alongside the company. If that sounds like something you want to help build, we'd love to have you on board!

About the Role

We're looking for a Quality Engineer who's a developer at heart. This isn't a traditional QA role – you'll write as much actual code as our engineers, but focused on building quality systems, testing frameworks, and observability tools. You'll be instrumental in enabling our team to ship fast and reliably, while ensuring our AI handles the complex, messy reality of enterprise workflows.

Why Lleverage?

• Change the world, literally: 2025 is the year AI works, and Lleverage.ai has the best AI platform (according to industry veterans).

• Work, learn, have fun: You'll be part of a top-notch engineering team that operates at the highest level of performance.

• Build a unique network: Connect with technical leaders and quality experts across industries who are implementing cutting-edge AI solutions.

• Get autonomy & ownership: Design your own testing strategies and own the quality infrastructure.

• Compensation: We pay top of market cash and equity, with compensation tied to the impact and reliability you deliver.

Responsibilities

• Enable developers: Create tools and processes that make it easy for developers to write and run tests, understand system behavior, and deliver quality code.

• Own quality end-to-end: Take responsibility for overall product quality from design phase to production – you're involved upfront and remain the last line of defense.

• Build quality infrastructure: Design and implement testing frameworks for our TypeScript/Node.js stack, including unit, integration, and end-to-end testing.

• Test AI/LLM systems: Help build evaluation standards and frameworks for AI functionalities, structured outputs, and reasoning models.

• Develop automation: Own end-to-end test automation in TypeScript – from user workflows to API testing.

• Perform manual testing: Jump in with hands-on testing when automation isn't enough, especially for complex user flows and edge cases.

• Improve observability: Implement tracing, monitoring, and debugging tools for our distributed system (ClickHouse, PostgreSQL, GKE).

• Review code: Participate in code reviews with a quality mindset, identifying potential issues before production.

• Test complex integrations: Validate our integrations with Business Central, SharePoint, and other enterprise systems.

Job Requirements

• Strong TypeScript/JavaScript developer with 3+ years of experience building production systems.
• You've written real applications, not just test scripts.
• Deep understanding of modern TypeScript, Node.js, and the JavaScript ecosystem.
• Experience building testing frameworks and tools from scratch.
• Expert level with modern testing tools (Jest, Playwright, Vitest, Cypress, etc.).
• Understanding of API testing, particularly REST and tRPC.
• Experience with CI/CD pipelines and test automation integration.
• Strong debugging and problem-solving skills.
• Assertive yet pragmatic: confident to speak up when quality is at risk while knowing when to deliver.
• Excellent communication – you can advocate for quality without being a blocker.

Nice to Haves

• LLM evaluation experience: Built evaluation frameworks, understand LLM-as-a-judge, experience with observability tools (LangSmith, Weights & Biases).
• Knowledge of distributed tracing and observability platforms.
• Experience testing microservice architectures and workflow systems.
• Contributions to open-source testing tools or quality frameworks.
• Experience with Google Cloud Platform (especially GKE).
• Familiarity with ClickHouse or similar analytics databases.

Our Tech Stack

We're building with tools that both humans and AI love:

• Frontend: React, TypeScript, and modern frontend tooling
• Backend: TypeScript and Python
• Cloud: GCP (preferred), Terraform
• Databases: ClickHouse, PostgreSQL
• Testing: Jest, Playwright, Vitest, and custom frameworks

And always exploring what's next.

What We Offer

You are ready for the ride of a lifetime with experienced entrepreneurs and innovators who aim for hyper growth on a global scale. We look for an enormous drive and hands-on mentality. Somebody who can work with us in creating the best AI low code solution out there!

We offer a competitive developer-level salary, a highly experienced (and very entertaining...) team, considerable share packages, the latest MacBook Pro and development tools, and the opportunity to shape quality practices in an early-stage startup.