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Software Engineer, Agent (French speaking)

Sierra· Engineering
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LondonFull-timePosted 11mo ago

About the role

Software engineer role focused on designing and delivering production-grade AI agents, owning the Agent Development Life Cycle, and partnering with large enterprises and startups to scale Sierra's AI agent platform. Requires French and English fluency, on-site in London.

Responsibilities

  • Design and deliver production-grade AI agents: You'll build and ship highly performant, reliable, and intuitive AI agents that are central, mission-critical and drive revenue directly to Sierra's growth.
  • Drive the Agent Development Life Cycle (ADLC): You'll have complete ownership and autonomy from initial pilot through deployment and continuous iteration. You'll be responsible for building, tuning, and evolving AI agents in production environments, defining the standard for ADLC best practices along the way.
  • Partner with large enterprises and cutting-edge startups: You’ll work directly with leaders at some of the world’s largest enterprises to understand their most pressing business challenges, and build AI agents that transform how they operate at scale. You'll also partner with the most cutting-edge startups in London, embedding AI agents across their entire business stack to drive innovation and efficiency.
  • Build the future of the platform: Your direct work with customers will guide the evolution of Sierra's core platform. You'll surface unmet needs, prototype new tools and features, and collaborate with research, product, and platform to shape the future of AI agent development and Sierra's product.

Qualifications

  • Experience building and scaling end-to-end production systems
  • Strong technical problem-solving skills, especially in fast-changing, ambiguous environments
  • A builder and tinkerer’s mindset with high agency - you find creative ways to overcome obstacles and ship
  • Comfort working directly with customers to understand their needs and solve real-world problems
  • Excellent communication skills - clear, direct, and persuasive across technical and non-technical audiences. Professional fluency in both French and English.

Skills

Required:End-to-end production systemsCustomer engagement

Benefits

  • Flexible (unlimited) paid time off
  • Medical, dental, and vision benefits for you and your family
  • Life insurance and disability benefits
  • Retirement plan dependent on country of employment
  • Parental leave
  • Fertility and family building benefits through Carrot
  • Lunch, as well as delicious snacks and coffee to keep you energized
  • Discretionary benefit stipend
  • Free alphorn lessons
Last updated Sep 16, 2026. Interested? Apply on the company site.
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About Sierra

Better customer experiences. Built on Sierra.

Sierra helps businesses build better, more human customer experiences with AI.

AICustomer ExperienceCustomer SupportVoiceai-agents-and-applicationsorchestrationvoice-ai-stackwing-list-2026
Company profileWebsite

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