Senior AI & Automation Engineer: Build Scalable AI Agents

Optimizely; Whitehall; On-site; GBP 90,000 - 130,000; Full time

Job summary

Optimizely in Whitehall, United Kingdom seeks an AI and Automation Engineer to design, build, and maintain AI-powered applications and automation. The role collaborates with reporting, data engineering, and operations to create reliable agents, MCP servers, and integrations that solve business problems.

The candidate will develop scripts and APIs, build cross-functional automation, and ensure efficient, scalable solutions while considering cost models for token usage and compute.

Qualifications

• 3–5 years of software development experience, including AI/ML tools, APIs, or agent frameworks.
• Proficiency in at least one modern programming language (Python, Node).
• Experience integrating APIs, working with data pipelines, or building automation workflows.
• Familiarity with building or configuring AI agents including MCP-based integrations.
• Understanding of AI/LLM cost models and how they factor into solution design.

Responsibilities

• Design, build, and maintain internal AI agents, applications, MCP servers, and automation workflows
• Develop and test scripts, APIs, and integrations connecting tools
• Build and iterate on agents that support reporting, operations, and cross-functional workflows
• Design and refine systems to ensure reliable, consistent outputs
• Collaborate with other technical teams to ensure clean, reliable data feeds to agents and automations
• Troubleshoot and resolve issues relating to automations and AI processes
• Author technical documentation to communicate designs and processes clearly
• Gather requirements with stakeholders to align on solution design

Skills

Python

Node.js

APIs

Data pipelines

Agent frameworks

Prompt design

AI/ML tools

Problem solving

Collaboration

Education

CS/Engineering/Math/Stats/Physics degree

Job description

Optimizely in Whitehall, United Kingdom seeks an AI and Automation Engineer to design, build, and maintain AI-powered applications and automation. The role collaborates with reporting, data engineering, and operations to create reliable agents, MCP servers, and integrations that solve business problems.

The candidate will develop scripts and APIs, build cross-functional automation, and ensure efficient, scalable solutions while considering cost models for token usage and compute.