GenAI QA Engineer: AI-Driven UI, API & Agentic Testing

Optimum Solutions (Singapore) Pte Ltd.; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

Optimum Solutions Singapore Pte Ltd. is seeking an experienced Quality Engineer to drive testing across web UIs, backend services and REST APIs. You will design and analyze requirements, participate in solution design discussions and validate GenAI-enabled components in a fast-paced environment.

The role involves validating distributed systems, building test artefacts, and collaborating with product, architecture, security and data teams to ensure robust quality and release readiness.

Qualifications

• 5 to 8 years of experience in software quality engineering, test engineering or a similar hands on role covering complex applications.
• Strong experience testing web user interfaces, backend services and REST APIs.
• Hands on ability with API tools and automation frameworks such as Postman, REST Assured, pytest, Playwright, Cypress, Selenium or equivalent.
• Working knowledge of Java, Python, JavaScript to build, review and troubleshoot test automation.
• Strong test analysis skills, including requirements review, risk assessment, boundary analysis, negative testing and traceability.
• Experience validating distributed systems and integrations, including asynchronous processing, queues, batch jobs and downstream dependencies.
• Ability to inspect logs, traces, network calls, payloads and database records to identify the actual failure point.
• Experience with Git, pull requests, CI/CD pipelines, test reporting and defect management tools.
• Understanding of security and privacy testing fundamentals, including access control, sensitive data handling, input validation and auditability.
• Strong stakeholder communication and the confidence to challenge weak designs, vague outcomes and premature release decisions.
• Ability to work in a fast moving environment where requirements and GenAI behaviour evolve.

Responsibilities

• Experience analysing complex applications across user journeys, business processes, APIs, data flows and enterprise integrations.
• Ability to facilitate requirements discussions and convert ambiguous business needs into clear functional requirements, acceptance criteria and solution behaviours.
• Experience producing practical analysis artefacts such as process flows, sequence diagrams, context diagrams, interface specifications, decision tables and user stories.
• Ability to analyse solution alternatives and explain tradeoffs involving quality, cost, performance, security, operational support and delivery complexity.
• Understanding of application architecture concepts including synchronous and asynchronous integrations, event flows, authentication, authorisation, failure handling and system boundaries.
• Ability to distinguish problems that require GenAI from those better addressed through deterministic rules, search, workflow automation or conventional application logic.
• Confidence working with product, architecture, engineering, security, data and business stakeholders during discovery and solution design.

Tools

Postman

REST Assured

pytest

Playwright

Cypress

Selenium

Git

CI/CD pipelines

OpenTelemetry

Elastic

Splunk

Langfuse

LangSmith

Job description

Optimum Solutions Singapore Pte Ltd. is seeking an experienced Quality Engineer to drive testing across web UIs, backend services and REST APIs. You will design and analyze requirements, participate in solution design discussions and validate GenAI-enabled components in a fast-paced environment.

The role involves validating distributed systems, building test artefacts, and collaborating with product, architecture, security and data teams to ensure robust quality and release readiness.