Location: Tan Binh, HCMC
Working time: 09:00 to 18:00, Monday to Friday
Job Summary:
Vortech is a B2B iGaming Platform Provider building a high-throughput integration platform used by major Operators worldwide.
We are looking for a Senior Automation QA Engineer (Backend/API) who thinks like a developer and tests like a pessimist. Your role is to safeguard our transaction engine by validating correctness, resilience, and performance of our REST APIs before they reach production.
You will focus on integration services, financial transactions, and distributed-system behavior, ensuring accuracy, consistency, and reliability under real-world conditions.
Key Responsibilities:
API & Backend Test Automation:
- Design, implement, and maintain automated tests for RESTful APIs using JSON payloads.
- Build reusable, maintainable test code not record-and-playback scripts.
- Validate request/response contracts, error handling, edge cases, and backward compatibility.
Financial & Transactional Logic Validation:
- Create deep automated test scenarios for critical transaction flows:
- Wallet operations (debit, credit, rollback).
-Idempotency and duplicate request handling.
-Concurrency and race-condition scenarios.
- Validate business rules across multiple services and system boundaries.
Integration & System Testing:
- Develop mock services and simulators to emulate Operator behavior, including:
-Invalid payloads and edge cases.
-Timeouts, retries, partial failures, and network instability.
- Execute end-to-end integration tests across services and databases.
Performance & Reliability Testing:
- Collaborate with the Tech Lead to plan and execute load and stress tests (e.g. using k6).
- Validate system behavior under high throughput and concurrent requests.
- Identify bottlenecks, failure patterns, and data consistency risks.
Data Integrity & Observability:
- Verify correctness of persisted data via database queries and transaction logs.
- Cross-check API responses against stored state and audit trails.
- Assist in validating logging, metrics, and traceability for production readiness.
CI/CD & Quality Gates:
- Integrate automated test suites into CI/CD pipelines.
- Define and enforce quality gates for releases (functional, integration, and regression).
- Provide clear, actionable feedback to developers.
Quality Ownership:
- Act as a quality partner for the Integration Team, not just a test executor.
- Proactively identify risk areas and propose test strategies.
- Raise issues early, clearly, and with evidence.
Required Qualifications:
MUST HAVE:
- Experience: 5+ years in QA, with at least 2+ years focused on backend/API testing and automation.
- Programming Skills: Comfortable writing clean, structured test code (any mainstream language).
- API Expertise: Strong understanding of HTTP/HTTPS, REST principles, JSON payloads, and error handling.
- Distributed Systems Mindset: Familiar with concepts such as concurrency, consistency, isolation, retries, and idempotency.
- Tooling: Hands-on experience with tools such as Postman, k6, Docker, Git, and CI pipelines.
- Communication: Good English communication and documentation skills.
NICE TO HAVE:
- Experience in iGaming, FinTech, Banking, or Payment Systems.
- Experience testing high-volume transaction systems.
- Experience running tests in containerized or cloud environments.
- Knowledge of API security testing and OWASP API Top 10.
- Exposure to gRPC or event-driven architectures.
Why Join Us
- A supportive and flexible working environment
- Macbook provided
- Premium health insurance
- SHUI contributions which comply with local laws
- 13th month salary & performance bonuses
- 15 paid annual leaves per year
- Work from home 3 days/month
- Company trip, happy hour, free snack and coffee
About the Company:
Vortech is a leading global provider of platforms, content, and services for the online gaming industry, committed to innovation, compliance, and sustainability. Established in 2025, Vortech focuses on regulated and newly regulating markets, offering cutting-edge B2B solutions powered by proprietary technology. Our mission is to deliver a secure, engaging, and data-driven betting and gaming experience, ensuring long-term value for shareholders, partners, and customers.
Backed by decades of industry expertise, our solutions are designed to enhance user engagement while maintaining the highest standards of responsible gaming. With operations in over 40 regulated markets and a strong presence across 7 countries, Vortech is ideally positioned to capitalize on emerging opportunities in digital gaming.
