Software Engineer Agent (Dutch Speaking)

Hackajob Ltd; City of Westminster; On-site; GBP 90,000 - 110,000; Full time

Job summary

Sierra is building a platform that helps businesses create more human customer experiences with AI. The team operates as an in-person company with offices in SF and expanding globally, including London.

We seek engineers who can design production-grade AI agents, own the development lifecycle, and collaborate with enterprise customers to transform operations at scale. Ideal candidates have a track record building AI/LLM systems in production, a founder mindset, and strong communication across

Qualifications

• Experience building and scaling end-to-end production systems.
• Strong technical problem-solving skills in fast-changing, ambiguous environments.
• A builder and tinkerer mindset with high agency and creativity to overcome obstacles and ship.
• Comfort working directly with customers to understand their needs and solve real-world problems.
• Excellent communication skills across technical and non-technical audiences.
• Experience building or deploying AI/LLM systems in production.
• Experience as a founder or founding engineer, with the ability to balance craft, ownership, and speed.
• Familiarity with tools that power todays AI agents, including eval frameworks, agent tooling, RAG pipelines, and prompt engineering.
• Prior experience with React, TypeScript, and/or Go.
• Previous 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 intuitive.
• Own the Agent Development Life Cycle from initial pilot through deployment and continuous iteration.
• Build, tune, and evolve AI agents in production environments.
• Work directly with leaders at large enterprises to understand business challenges and build AI agents that transform how they operate at scale.
• Partner with cutting-edge startups in London to embed AI agents across their business stack.
• Surface 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 product.
• Design and build AI agents for large telecommunications and media companies that outperform human agents in managing subscription churn.
• Develop AI agents for complex customer interactions such as troubleshooting broken devices and personalizing product recommendations.
• Create generalizable AI agent frameworks tailored for industry-specific use cases.
• Facilitate design partnerships for new product initiatives, including new agent architectures, self-service capabilities, and generative agent development.
• Experiment with the latest voice models and integrate them at scale for enterprise-grade customers.

Skills

Experience building and scaling end-to

Technical problem-solving in ambiguous

Builder mindset

Customer engagement

Communication skills

AI/LLM production experience

Founder mindset

AI agent tooling familiarity

React/TypeScript/Go

Customer-facing/project leadership

Tools

React

TypeScript

Go

Job description

Salary: £100,000 - 100,000 per year

Requirements:

• Experience building and scaling end-to-end production systems
• Strong technical problem-solving skills, especially in fast-changing, ambiguous environments
• A builder and tinkerer mindset with high agency and creativity to overcome obstacles and ship
• Comfort working directly with customers to understand their needs and solve real-world problems
• Excellent communication skills across technical and non-technical audiences
• Experience building or deploying AI/LLM systems in production
• Experience as a founder or founding engineer, with the ability to balance craft, ownership, and speed
• Familiarity with tools that power todays AI agents, including eval frameworks, agent tooling, RAG pipelines, and prompt engineering
• Prior experience with React, TypeScript, and/or Go
• Previous 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 intuitive
• Own the Agent Development Life Cycle from initial pilot through deployment and continuous iteration
• Build, tune, and evolve AI agents in production environments
• Work directly with leaders at large enterprises to understand business challenges and build AI agents that transform how they operate at scale
• Partner with cutting-edge startups in London to embed AI agents across their business stack
• Surface 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 product
• Design and build AI agents for large telecommunications and media companies that outperform human agents in managing subscription churn
• Develop AI agents for complex customer interactions such as troubleshooting broken devices and personalizing product recommendations
• Create generalizable AI agent frameworks tailored for industry-specific use cases
• Facilitate design partnerships for new product initiatives, including new agent architectures, self-service capabilities, and generative agent development
• Experiment with the latest voice models and integrate them at scale for enterprise-grade customers

Technologies:

• AI
• AI Agents
• LLM
• RAG
• React
• TypeScript
• CTO
• Support
• Salesforce
• VR

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 38 week of 2026