Senior QA Automation Engineer

About us ace is a specialist post-digital advisory and delivery partner helping financial institutions implement high-impact automation, AI, and post-digital solutions in regulated environments. We combine deep technical expertise with a practical understanding of governance, controls, and operational risk to deliver production-grade outcomes at pace. We are part of the G MASS group, a global financial services resource augmentation and consulting firm that provides expert talent and delivery support across transformation, change, and operational resilience. QA Automation Engineer ace has partnered with a prestigious, leading global Hedge Fund to appoint an experienced QA Automation Engineer to take hands-on ownership of the build-out and enterprise adoption of the firm’s in-house automated testing platform. This is an engineering-first role. You will be the senior technical voice on it: developing across the full stack, extending its intelligence and integrations, and driving it toward a fully automated, agent-orchestrated and ultimately predictive testing capability. The target state is complete lineage from requirement through to result, governed and auditable end to end, with no part of the process running out of spreadsheets. You will work with a high degree of autonomy alongside a small, highly efficient QA function, in a demanding and fast-moving environment where the expectation is delivery rather than management overhead. Please note that this role requires presence in the client’s London office five days per week. This is non-negotiable. Responsibilities Platform engineering and delivery Take hands-on ownership of the continued build-out of the in-house automated testing platform, driving it from partial implementation to full adoption across the applications in scope. Develop across the full stack: front-end interfaces in React and JavaScript, and back-end services, automation logic and data processing in Python. Extend the platform interface so that test design, execution, evidence capture, results and stakeholder packaging all sit in a single pane, removing residual spreadsheet-based working. Build and maintain integrations across the surrounding toolchain, requirements management, source control and pull-request data, and positions and transactions data, so that test coverage is derived systematically rather than assembled manually. Maintain integration with the firm’s enterprise design system so that changes to UI design are automatically assessed for regression impact on dependent applications. Lineage, governance and assurance Deliver complete lineage from requirement, through rule and rule change, to test script, execution, results and UAT packaging - with full auditability, governance and versioning at every step. Extend the platform’s use of AI to interpret requirements, distinguish well-formed from poorly-formed requirements, identify coverage gaps, and generate candidate test scripts and…