Senior QA at DeGaming

🤝Full Time
📍Stockholm, Sweden

We’re looking for a Senior QA Engineer to help us build and scale our next-gen casino infrastructure.

About the Role

In a platform where every bet is mirrored on-chain, and every win must be mathematically respected, “good enough” testing doesn’t exist. We need a technical QA Engineer to validate our high-velocity event-driven architecture and ensure complex transaction logic is flawless. You will build automated guardrails that enable us to ship quickly without compromising the transparent nature of our platform.

What You’ll Be Doing

• Architect E2E Testing Framework: Lead the selection and implementation of our first end-to-end testing framework (like Playwright). You will integrate these automated guardrails into our SST and AWS infrastructure to bake testability and observability into every deployment.
• Ensure Data Integrity: Validate that every payout, bet, and wallet interaction remains consistent as it flows from legacy systems to the on-chain mirror. You will verify the mathematical accuracy of transaction history and game results across the entire pipeline.
• Validate Async and High-Concurrency Workflows: Build tests for our event-driven architecture to ensure queues and workers handle partial failures and race conditions correctly. You will manage complex scenarios, like transaction rollbacks and data reconciliation between off-chain and on-chain states.
• Navigate Production Realities: Investigate issues in environments where traditional tools are limited. Since we operate on-chain, you cannot simply mock balances or fake money to test logic in staging or prod. You will develop strategies to validate our systems under real-world constraints where every transaction is permanent and verifiable.
• Push the Team Forward: Work directly with engineers to define “definition of done,” ensuring observability and testability are baked into the code from day one.

About You

• Automation-First: You believe manual testing is a last resort. You are comfortable writing TypeScript to build robust, maintainable testing frameworks.
• Technically Curious: You want to know how the EventBridge bus handles traffic and how the PostgreSQL index is performing, not just if the UI button is the right color.
• Casino/Web3 Alignment: You have experience in the casino industry and are familiar with Web3 and smart contracts. You are excited to tackle the unique testing challenges of on-chain data.
• Detail-Oriented & Pragmatic: You have a “break it” mentality for edge cases, but understand the need to ship and iterate in a fast-paced startup environment.
• Startup-Ready: You thrive in ambiguity and move fast, but you never sacrifice the accuracy required for financial and gaming systems.

Tech Stack

• Languages & Runtime: TypeScript, Node.js
• Tools & Infra: Bruno (API Testing), AWS CloudWatch, SST (Pulumi), GitHub Actions
• Database: PostgreSQL