AI-Powered Interview Preparation Chatbot

Client Profile

A career coaching startup aiming to offer scalable, high-quality interview preparation support for job seekers.

Business Challenge

The startup faced several core challenges:

• Many job seekers experienced interview anxiety and lacked feedback on their performance.
• Personalised coaching didn’t scale well and was cost-prohibitive.
• Candidates needed access to realistic, 24/7 mock interview support.
• The AI solution had to simulate real interviewer behaviour and provide personalised feedback.

Solution Approach

We developed a web and mobile AI Interview Coach chatbot, powered by state-of-the-art LLMs and speech technologies.

Key Features

• Text + Voice Interaction:
  • Users could respond to questions by typing or speaking.
  • Voice handled by ElevenLabs (text-to-speech) and speech-to-text for natural interactions.
• Dynamic Question Generation:
  • Users could input a job title or a complete job description.
  • GPT-4 generated tailored question sets based on industry and role expectations.
• Real-Time Feedback Engine:
  • GPT-4 evaluated responses using behavioural interview frameworks like STAR.
  • Feedback included:
    • Content relevance
    • Structural clarity
    • Delivery tone & pacing
    • Filler word frequency
• Session Summary + Progress Tracking:
  • After each session, users received a breakdown of their strengths and improvement areas.
  • Previous sessions were saved for long-term skill tracking.

Results & Benefits

• Over 1,000 users engaged in the first month.
• Users averaged three mock sessions each.
• 87% reported increased interview confidence.
• 200+ users landed jobs within 2 months.

From the startup’s perspective:

• 60% drop in repetitive workload for human coaches.
• 3x increase in client capacity with no additional staff.
• Cost-effective sessions improved margins and accessibility.
• Consistent feedback quality across all users.
• Users practised more frequently – often doing “night-before” prep sessions.

User Impact

“The AI coach picked up on things even my friends didn’t notice in my answers. It’s like a mirror that talks back and helps you improve.”

• The judgment-free environment eased anxiety.
• Voice mode made mock interviews feel realistic.
• Initially sceptical users praised the personalised and actionable feedback.

The startup noted that clients who paired the chatbot with human coaching had the most significant performance gains

What’s Next

• Expanding to include industry-specific modules and video-based feedback (for body language).
• Partnering with university career centres to help students land their first jobs.

The AI chatbot has become a cornerstone of the startup’s product strategy, driving engagement, client success, and media recognition.