Agentic Systems Builder & QA Engineer

Sitel
UK
4 days ago
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Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience level
Experienced
Experience required
3 years minimum
Working hours
Regular working hours
Languages
English, Spanish, French
Job source

Tech stack

Agile Methodology Artificial Intelligence Automation of Tests Programming Tools Python (Programming Language) Regression Analysis Strategies of Testing Large Language Models Multi-Agent Systems Model Validation Information Technology Api Design
+1 more
Network Server

Job description

We are looking for an Agentic Systems Builder & QA Engineer to sit at the intersection of building, testing, and adoption of our agentic systems framework. You will be the first user of the tools we build - stress-testing them, running evaluations, identifying gaps, and feeding insights back to the engineering team.

Beyond QA, you will play a key role in enabling other teams to build with our framework: onboarding them, understanding their use cases, translating their needs into actionable specs, and running discovery to inform the platform roadmap. You will combine hands-on building and testing with product-minded thinking - ensuring that what we ship is not only technically sound but genuinely useful for the teams adopting it.

This role is ideal for someone who enjoys working across boundaries: part builder, part tester, part enabler - with a strong sense for what makes tools intuitive, reliable, and ready for real-world use., Building & Testing

  • Be the primary hands-on tester of the agentic systems framework - building agents using our tools, identifying bugs, edge cases, and usability issues before other teams encounter them
  • Run end-to-end evaluations of agentic systems: execute evaluation pipelines, create and curate datasets, analyze results, and report on agent quality and reliability
  • Build and configure agentic workflows using the framework’s interfaces - system prompts, model selection, tool integrations - validating that the developer experience works as intended
  • Define and execute QA processes for new framework features, integrations, and releases

Adoption & Enablement

  • Support other technical teams in building agentic systems with our tools - onboarding, troubleshooting, and sharing best practices
  • Act as the bridge between adopting teams and the engineering team: gather feedback, identify friction points, and advocate for improvements
  • Create documentation, guides, and examples that help teams get started and build effectively

Discovery & Product

  • Run discovery with internal teams to understand their use cases, pain points, and requirements for agentic systems
  • Translate user needs into clear specs and requirements that the engineering team can act on
  • Help prioritize framework improvements based on real adoption feedback and observed usage patterns
  • Contribute to roadmap discussions with a grounded perspective on what teams actually need

Evaluation & Quality

  • Execute and refine evaluation workflows - running experiments, comparing agent configurations, and reporting on metrics
  • Help define what “good” looks like for agent behavior in different use cases
  • Flag quality issues, regressions, and drift in deployed agentic systems

Requirements

  • 3+ years in a role combining development, QA, testing, or technical product work
  • Experience building or configuring AI/ML-powered systems or applications
  • Experience working directly with end users or internal teams to gather requirements and feedback
  • Some exposure to product management practices: discovery, spec writing, prioritization, * Comfort working with APIs, configuration interfaces, and developer tooling
  • Understanding of LLMs and how they are integrated into applications (prompting, tool calling, structured outputs)
  • Strong analytical and communication skills - able to clearly articulate issues, feedback, and requirements
  • Detail-oriented with a quality-first mindset
  • Comfortable in Agile, fast-paced environments with evolving scope, * Experience with agentic systems or agent orchestration frameworks (LangGraph, LangChain, or similar)
  • Experience with observability or evaluation tooling (LangFuse or similar)
  • Experience with MCP Servers/Clients
  • Background in QA engineering or test automation
  • Experience with testing methodologies - manual and/or automated, ideally for AI or non-deterministic systems
  • Experience in a product management or technical product owner role
  • Development skills in Python
  • Familiarity with vector databases, RAG pipelines, or NLP
  • Experience writing technical documentation or developer guides

Education

Bachelor’s degree or higher in Computer Science, Engineering, or a related field - or equivalent practical experience.

Languages

  • Excellent written and conversational English (C1 minimum)
  • French and Spanish are a plus

Benefits & conditions

  • Impactful work. Opportunity to work on cutting-edge AI technologies that will be game changers for our business.
  • Professional growth. Continuous learning and development opportunities in a dynamic, remote work environment.
  • Competitive compensation. Attractive salary and benefits package.
  • Collaborative environment. A supportive team culture with opportunities for occasional travel for training and industry events.

About the company

Foundever is a global leader in the customer experience (CX) industry. With 150,000 associates across the globe, we are the team behind the best experiences for more than 750 of the world’s leading and digital-first brands. Our innovative CX solutions, technology, and expertise are designed to support operational needs for our clients and deliver seamless, AI-driven experiences in the moments that matter.

As AI becomes increasingly agentic and autonomous, we are building a platform to orchestrate intelligent workflows that automate complex business processes at scale.

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