Senior QA Engineer

Keyloop; East Hampshire; On-site; GBP 70,000 - 95,000; Full time

Job summary

Keyloop is seeking a Senior QA Engineer to own quality across our product portfolio, defining the QA strategy from backend services to omnichannel communications. You will build automated tests for a TS/Node.js/React/Python stack and design evaluation frameworks for AI agent behaviour, focusing on reliability, performance and security.

You will collaborate with engineers and product teams to embed quality from the start, advocate for testability and help raise the bar on what constitutes done.

Qualifications

• Proven experience as a Senior QA Engineer on complex, production software products.
• Strong hands‑on skills using test frameworks (Playwright, Cypress, Jest).
• Experience testing APIs, backend services, and databases (PostgreSQL or similar).
• Understanding of testing non‑deterministic systems and QA strategy design.

Responsibilities

• Design and own the quality strategy for our AI agent platform, including testing non‑deterministic systems.
• Build automated test suites across unit, integration, API, and end‑to‑end tests for TS/Node.js/React/Python stack.
• Develop evaluation frameworks for agent behaviour and reasoning quality.
• Test omnichannel platform across web, messaging, voice channels and more.
• Collaborate with engineers to define acceptance criteria and improve testability.

Skills

Senior QA Engineer

QA leadership

Testing strategies

Communication

Tools

Playwright

Cypress

Jest

PostgreSQL

Job description

Keyloop bridges the gap between dealers, manufacturers, technology suppliers and car buyers.

We empower car dealers and manufacturers to fully embrace digital transformation. How? By creating innovative technology that makes selling cars better for our customers, and buying and owning cars better for theirs.

We use cutting‑edge technology to link our clients’ systems, departments and sites. We provide an open technology platform that’s shaping the industry for the future. We use data to help clients become more efficient, increase profitability and give more customers an amazing experience. Want to be part of it?

The Role:

As a Senior QA Engineer, you’ll own quality across our product portfolio. You’ll define and lead our quality strategy across the full platform, from backend services and agent orchestration through to omnichannel communications.

You’ll work closely with engineers and product to build in quality from the start, not just a manual check at the end. You’ll design and execute tests to measure the quality of our AI agents, testing for probabilistic outputs, expected reasoning behaviours, performance and overall security.

What You’ll Be Doing:

• Design and own the quality strategy for our AI agent platform, including approaches to testing non‑deterministic, LLM‑powered systems.
• Build and maintain automated test suites covering unit, integration, API, and end‑to‑end scenarios across our TypeScript/Node.js/React/Python stack.
• Develop evaluation frameworks for agent behaviour, testing reasoning quality, tool use, memory, and multi‑step interaction flows.
• Test and validate our omnichannel communication platform across channels: web, messaging, voice, and beyond.
• Collaborate closely with engineers and define acceptance criteria that catch issues early in the development cycle.
• Champion a culture of quality across the team, reviewing test coverage in PRs, advocating for testability in system design, and raising the bar for what “done” means.
• Use and help shape AI‑assisted testing tooling to accelerate coverage and surface issues faster.

What We’re Looking For:

• Proven experience as a Senior QA Engineer on complex, production software products.
• Strong hands‑on skills using test frameworks (e.g. Playwright, Cypress, Jest).
• Experience testing APIs, backend services, and databases (PostgreSQL or similar).
• A clear understanding of how to approach testing non‑deterministic systems.
• Experience designing and implementing QA strategy.
• Strong communication skills, you can articulate quality risks clearly to both engineers and non‑technical stakeholders

Nice to have:

• Experience evaluating LLM or agentic systems, prompt behaviour, output quality, hallucination risks, or agent evaluation frameworks.
• Familiarity with performance, load, or chaos testing for real‑time or event‑driven systems.
• Background in automotive, dealership tech, or B2B SaaS.
• Exposure to AI‑assisted development and testing tools (e.g. GitHub Copilot, Cursor, Claude Code).

Why join us?

We’re on a journey to become market leaders in our space – and with that comes some incredible opportunities. Collaborate and learn from industry experts from all over the globe. Work with game‑changing products and services. Get the training and support you need to try new things, adapt to quick changes and explore different paths. Join Keyloop and progress your career, your way.

An inclusive environment to thrive

We’re committed to fostering an inclusive work environment. One that respects all dimensions of diversity. We promote an inclusive culture within our business, and we celebrate different employees and lifestyles – not just on key days, but every day.

Be rewarded for your efforts

We believe people should be paid based on their performance so our pay and benefits reflect this and are designed to attract the very best talent. We encourage everyone in our organisation to explore opportunities which enable them to grow their career through investment in their development but equally by working in a culture which fosters support and unbridled collaboration.

Keyloop doesn’t require academic qualifications for this position. We select based on experience and potential, not credentials.

We are also an equal opportunity employer committed to building a diverse and inclusive workforce. We value diversity and encourage candidates of all backgrounds to apply.

” At Keyloop, AI is a daily ally: We encourage and train every employee to use our AI tools to boost their creativity and productivity.”