AI Engineer
StackOneUnited Kingdom22 hours ago
Full-timeRemote FriendlyEngineering, Information Technology
Track This Job
Add this job to your tracking list to:
- Monitor application status and updates
- Change status (Applied, Interview, Offer, etc.)
- Add personal notes and comments
- Set reminders for follow-ups
- Track your entire application journey
Save This Job
Add this job to your saved collection to:
- Access easily from your saved jobs dashboard
- Review job details later without searching again
- Compare with other saved opportunities
- Keep a collection of interesting positions
- Receive notifications about saved jobs before they expire
AI-Powered Job Summary
Get a concise overview of key job requirements, responsibilities, and qualifications in seconds.
Pro Tip: Use this feature to quickly decide if a job matches your skills before reading the full description.
About StackOne
StackOne is the AI Integration Gateway powering the next generation of SaaS and AI Agents. Backed by GV, Workday Ventures, and angels/advisors from DeepMind, OpenAI, GitHub & Mistral, we’ve raised $24M to enable developers to orchestrate thousands of secure, scalable, and accurate actions in AI Agents.
With an AI-native integration toolkit that delivers real-time execution, managed authentication, granular permissions, and full observability, all built with safety at its core, we’re now doubling down on AI R&D & creating our own lab to push the boundaries of tool calling for agents: training specialized LLMs designed to outperform general-purpose models in what matters most: precision, reliability, and safety in agentic execution.
About The Role
You'll help build a world where users of any agents can integrate with the tool of their choice in one click thanks to StackOne.
We are looking for a Software Engineer with a strong background in AI production-grade applications with professional experience working with LLMs (eg: GPT, Anthropic and others).
In this role, you will deliver AI features and products end-to-end and work with the wider AI team of StackOne (comprising of AI researchers and other AI engineers). You will report directly to the CTO.
Responsibilities
We believe diversity drives innovation. We encourage individuals from all backgrounds to apply. As an equal-opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all employees.
StackOne is the AI Integration Gateway powering the next generation of SaaS and AI Agents. Backed by GV, Workday Ventures, and angels/advisors from DeepMind, OpenAI, GitHub & Mistral, we’ve raised $24M to enable developers to orchestrate thousands of secure, scalable, and accurate actions in AI Agents.
With an AI-native integration toolkit that delivers real-time execution, managed authentication, granular permissions, and full observability, all built with safety at its core, we’re now doubling down on AI R&D & creating our own lab to push the boundaries of tool calling for agents: training specialized LLMs designed to outperform general-purpose models in what matters most: precision, reliability, and safety in agentic execution.
About The Role
You'll help build a world where users of any agents can integrate with the tool of their choice in one click thanks to StackOne.
We are looking for a Software Engineer with a strong background in AI production-grade applications with professional experience working with LLMs (eg: GPT, Anthropic and others).
In this role, you will deliver AI features and products end-to-end and work with the wider AI team of StackOne (comprising of AI researchers and other AI engineers). You will report directly to the CTO.
Responsibilities
- Act as a full-stack engineer: design, build, and ship features across frontend, backend, and infrastructure.
- Leverage AI models to accelerate development, while maintaining best-in-class reliability, testing, and code quality.
- Build and maintain inference pipelines, embeddings, retrieval, and orchestration systems.
- Integrate tool-calling and MCP (Model Context Protocol) patterns into product features.
- Ship and maintain open-source or internal TypeScript/Python packages.
- Work with AWS and/or Cloudflare to deliver scalable, secure, low-latency systems.
- Collaborate with product and design to deliver features end-to-end.
- Proven experience as a full-stack engineer.
- Expertise in TypeScript and/or Python.
- Strong background in building on AWS and/or GCP and/or Cloudflare.
- Experience building and shipping TypeScript/Python packages.
- Familiarity with tool-calling, agent frameworks, and MCP.
- Track record of shipping production systems with high code quality and reliability.
- Curiosity to push the boundaries of what AI-powered development can deliver.
- Past experience with Generative AI/LLMs and related technologies/frameworks
- Desire to work in a fast-paced startup, taking ownership of projects e2e and bias towards shipping.
- (Preferred): Experience working on/publishing CLIs & SDKs
- 25 days holiday + 1 additional day holiday per year of tenure
- Participation in the company’s employee share options plan
- Private health insurance (including dental & optical)
- Health, fitness and gift card discounts
- £1,000 for your home office set up + £500/year top-up
- Paid lunch in the office
- Annual team offsite to sunny spots (last ones were in Spain and Portugal ☀️)
- Join one of Europe’s fastest-growing startups
- Work with a veteran team of ex-employees of Google, Microsoft, Oracle, Coinbase, JP Morgan and more
- Cycle2Work and Electric Cars scheme
- Hybrid work set up - typically 2d in the office
We believe diversity drives innovation. We encourage individuals from all backgrounds to apply. As an equal-opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all employees.
Key Skills
Ranked by relevanceReady to apply?
Join StackOne and take your career to the next level!
Application takes less than 5 minutes