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Generative AI for 66% Reduced Interview Setup Time

Discover how Geektrust reduced interview setup time by 66% and achieved 90% cost savings with an autonomous AI Interviewer Agent built for scale and domain precision.

Krishnan Nair
CEO and Co-Founder at Geektrust
Rating
5
(1)
Format
PDF
Page Count
44
Published
April 28, 2025
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Generative AI for 66% Reduced Interview Setup Time

Discover how Geektrust reduced interview setup time by 66% and achieved 90% cost savings with an autonomous AI Interviewer Agent built for scale and domain precision.

The expert: Krishnan Nair, CEO and Co-Founder at Geektrust.

The organization: Geektrust, a Bengaluru-based tech-hiring startup helping companies evaluate software engineering talent through real-world coding challenges and AI-powered assessments.

The problem: Geektrust’s existing ML-driven code assessment tool, Codu.ai, was limited in functionality and expensive to maintain—hindering scalability and requiring intensive development resources.

The solution: A scalable, context-aware AI Technical Interviewer Agent that automates initial technical interviews, delivering reliable and customizable assessments.

Key decisions
  • Adopt asynchronous architecture for scale and fault tolerance
  • Introduce a two-step prompt flow to support complex task decomposition
  • Design prompts using a domain-driven framework to ensure precision and adaptability
Key results
  • 90% reduction in infrastructure and operational costs
  • 66% decrease in interview setup time
  • 100+ simultaneous interviews conducted with AI

1. Codu.ai: Success without Sustainability

The limitations and challenges of Geektrust's initial ML-driven code assessment platform, Codu.ai.

2. OpenAI: A Disruptive Challenge with Transformative Potential

How OpenAI's technologies reshaped Geektrust's product strategy and operational efficiency.

3. The Solution: AI Technical Interviewer Agent

The AI-powered Interviewer Agent, its capabilities and measurable outcomes.

4. How Geektrust Improved Mock Interviews for an EdTech Startup

A problem-solution-outcome mapping.

5. The Tech Stack

Provides an overview of the technologies powering the agent, from frontend to infrastructure.

6. Development and Deployment

The phased approach used to design, test, and roll out the AI Technical Interviewer Agent.

7. The Core Tech that Powers the Agentic Workflow

The key technologies: asynchronous architecture, dynamic IDEs, and LLM engineering.

8. Error Handling and Troubleshooting

Strategies for resolving technical issues, ensuring resilience and continuity during interviews.

9. Integration and Implementation

How Geektrust's system integrates with ATS platforms and client workflows to ensure seamless adoption.

10. Key Operational Challenges

Specific challenges of designing prompts for autonomy, reliability, and dynamism in agents.

11. Key Insights for Tech Leaders

Lessons learned and actionable takeaways.

12. Conclusion

Case study insights in a nutshell with closing thoughts.

“I gave the team full freedom to experiment with LLMs and generative AI — no pressure to deliver features fast, just the space to learn and explore. When you hire smart people, trust them. Give them time and resources, and they’ll figure it out.”

Krishnan Nair, CEO and Co-Founder at Geektrust

Meet the Experts

Krishnan Nair

CEO and Co-Founder at Geektrust
A seasoned software developer with over a decade of project management experience, Krishnan combines technical expertise and strategic leadership to drive innovation at Geektrust. His pragmatic approach to generative AI, rooted in a developer's perspective, allows him to discern practical value from market hype. At a time when many enterprise leaders were either skeptical or struggling to implement AI effectively, Krishnan identified its potential and aligned it with business needs to deliver measurable outcomes.
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