About this role
Salary: £100,000 - 100,000 per year
Requirements: Experience building and scaling end-to-end production systemsStrong technical problem-solving skills, especially in fast-changing, ambiguous environmentsA builder and tinkerer mindset with high agency and creativity to overcome obstacles and shipComfort working directly with customers to understand their needs and solve real-world problemsExcellent communication skills across technical and non-technical audiencesExperience building or deploying AI/LLM systems in productionExperience as a founder or founding engineer, with the ability to balance craft, ownership, and speedFamiliarity with tools that power todays AI agents, including eval frameworks, agent tooling, RAG pipelines, and prompt engineeringPrior experience with React, TypeScript, and/or GoPrevious roles interfacing with customers or leading technical projects with external stakeholders Responsibilities: Design and deliver production-grade AI agents that are highly performant, reliable, and intuitiveOwn the Agent Development Life Cycle from initial pilot through deployment and continuous iterationBuild, tune, and evolve AI agents in production environmentsWork directly with leaders at large enterprises to understand business challenges and build AI agents that transform how they operate at scalePartner with cutting-edge startups in London to embed AI agents across their business stackSurface unmet needs from customer work, prototype new tools and features, and collaborate with research, product, and platform to shape the future of AI agent development and our productDesign and build AI agents for large telecommunications and media companies that outperform human agents in managing subscription churnDevelop AI agents for complex customer interactions such as troubleshooting broken devices and personalizing product recommendationsCreate generalizable AI agent frameworks tailored for industry-specific use casesFacilitate design partnerships for new product initiatives, including new agent architectures, self-service capabilities, and generative agent developmentExperiment with the latest voice models and integrate them at scale for enterprise-grade customers Technologies: AIAI AgentsLLMRAGReactTypeScriptCTOSupportSalesforceVR More:
We are Sierra, building a platform that helps businesses create more human customer experiences with AI. We are primarily an in-person company based in San Francisco, with growing offices in Atlanta, New York, London, Paris, Madrid, Munich, Singapore, Japan, and Sydney. Our culture is guided by Trust, Customer Obsession, Craftsmanship, Intensity, and Family. We offer full-time employees flexible unlimited paid time off, medical, dental, and vision benefits, life insurance and disability benefits, a retirement plan dependent on country of employment, parental leave, fertility and family building benefits through Carrot, lunch, snacks and coffee, a discretionary benefit stipend, free alphorn lessons, and access to equity plans subject to applicable terms. We are committed to building a diverse, inclusive team and encourage applicants to apply even if their experience does not precisely match the role.
last updated 37 week of 2026