Senior Full-Stack AI Engineer

Senior Full-Stack AI Engineer

Contract Details

• Location: Sheffield - 3 days onsite per week (mandatory)
• Contract Duration: 6 months
• Rate: £500/day inside IR35

Role Overview

We are seeking a Senior Full-Stack AI Engineer to build an end-to-end AI-powered helpdesk product, spanning web applications, Back End APIs, agent orchestration, and enterprise workflow automation.

The successful contractor will work across the full product life cycle, delivering scalable and secure AI-enabled support solutions for enterprise users.

Key Responsibilities

• Design and develop user-facing applications for employees, support agents, and administrators.
• Build and maintain Front End, Back End, and API layers supporting:
  • Chat interfaces
  • Ticket submission
  • Status tracking
  • Escalation workflows
• Develop LLM/agent workflows to automate repetitive IT helpdesk tasks, including:
  • Password resets
  • Account unlocks
  • Software access requests
  • Knowledge-based troubleshooting
• Integrate with enterprise platforms including ticketing, identity, collaboration, and ITSM systems.
• Implement prompt orchestration, guardrails, fallback logic, and human handoff mechanisms.
• Own feature delivery from solution design through deployment and production release.

Required Skills & Experience

• Strong full-stack engineering experience using modern Front End and Back End frameworks.
• Commercial experience with one or more of:
  • Python
  • Node.js
  • Java
• Proven experience building:
  • REST APIs
  • Workflow services
  • Production-grade web applications
• Working knowledge of:
  • LLM APIs
  • Prompt engineering
  • AI agent/tool-calling patterns
• Experience with:
  • Authentication and authorisation
  • Role-based access control (RBAC)
  • Logging/monitoring
  • Secure coding practices

Preferred Experience

• Integration experience with platforms such as:
  • ServiceNow
  • Jira
  • Zendesk
  • Microsoft Teams
  • Slack
  • Telephony/chat systems
• Experience building internal enterprise support or helpdesk tooling.

Additional Information

• Candidates must be available to work onsite in Sheffield 3 days per week.
• BPSS eligibility is mandatory for this engagement.