Senior API QA Engineer — FinTech, In-Office London

Hyperlayer; Greater London; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Performance-based bonus

25 days annual leave + birthday day +

AXA PPP Health Insurance with gym

Cycle-to-work scheme

Referral bonus

Workplace nursery

Job summary

Hyperlayer is the intelligent banking platform delivering a secure rules and orchestration engine for hyper-personalised products. This role focuses on building and maintaining robust API test automation, turning complex money-movement flows into reliable, scalable tests.

You will own Pact contract tests, drive CI/CD quality gates, and collaborate with engineering to ensure production-readiness in a fast-moving fintech startup.

Qualifications

• 5+ years in QA or quality engineering in a product engineering team.
• Strong Java skills and writing clean, maintainable framework code.
• Hands-on experience with REST Assured for API testing.
• Experience with Pact or similar contract testing and Pact Broker.
• Familiarity with CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI).
• Knowledge of OpenAPI/JSON Schema and OAuth/JWT security aspects.
• Experience with AI-assisted testing tools and techniques is a plus.
• Willingness to be in London office four days per week.
• Nice-to-have: fintech/payments or regulated financial services exposure.
• Knowledge of performance testing tools (Gatling, JMeter) is a plus.

Responsibilities

• Review acceptance criteria before work starts, covering edge cases and non-functional expectations.
• Turn complex orchestration and payment flows into risk-based test plans and automate high-risk scenarios.
• Build and maintain API test suites in Java and REST Assured beyond happy path.
• Write Pact contract tests for provider and consumer verification in CI/CD.
• Run structured exploratory testing on new features, especially money movement and onboarding journeys.
• Own scenario-level test data using shared seeding mechanisms.
• Keep test suites running in CI/CD on every change and fix flaky tests at root cause.
• Assist investigation of production issues with engineering and contribute regression tests.
• Provide input to release go/no-go decisions and share coverage/quality metrics.
• Explore AI tooling to enhance test generation and maintenance.

Skills

Java

REST Assured

Pact

CI/CD

AI tools in testing

Performance testing

Automation framework

Exploratory testing

OAuth 2.0 / JWT

OpenAPI / JSON Schema

Education

Bachelor’s degree in Computer Science or related

Tools

Postman/Newman

Pact Broker

Jenkins

GitHub Actions

GitLab CI

Gatling

JMeter

Job description

Hyperlayer is the intelligent banking platform delivering a secure rules and orchestration engine for hyper-personalised products. This role focuses on building and maintaining robust API test automation, turning complex money-movement flows into reliable, scalable tests.

You will own Pact contract tests, drive CI/CD quality gates, and collaborate with engineering to ensure production-readiness in a fast-moving fintech startup.