Overview
About LockedIn AI
LockedIn AI is the #1 real-time AI interview and meeting copilot, trusted by over one million users worldwide. We deliver AI-powered assistance during live job interviews, coding assessments, and professional meetings — helping candidates communicate with clarity, confidence, and competence.
We are building the most advanced career preparation platform on the market, where every AI response our users see flows through the work of our Prompt Engineers.
Role Overview
We are seeking a creative, technically sharp Prompt Engineer to design, craft, and optimize the prompts and instruction sets that power LockedIn AI’s core experience.
In this hands-on, high-leverage role, you will own the full prompt lifecycle: understanding user needs, designing prompt architectures, testing outputs, iterating based on performance data, and optimizing across multiple LLMs (OpenAI, Anthropic, Google AI, open-source models).
You will ensure every AI-generated response is accurate, relevant, coherent, and aligned with LockedIn AI’s quality standards — while managing cost, latency, and safety.
Key Responsibilities
Prompt Design & Optimization
Design, write, and optimize production-grade prompts for interview coaching, coding assistance, and meeting support.
Build reusable prompt architectures: system prompts, chain-of-thought reasoning, few-shot examples, role-based instructions, and multi-turn conversations.
Apply advanced techniques like zero-shot, few-shot, self-consistency, tree-of-thought, and retrieval-augmented prompting.
Maintain a structured prompt library with version control, benchmarks, and best practices.
Evaluation & Quality Assurance
Build rigorous prompt evaluation frameworks with metrics: accuracy, relevance, tone, hallucination rate, and latency.
Conduct systematic experiments, A/B tests, and comparative analysis across models and prompts.
Analyze failure modes and rapidly iterate on prompt designs to improve output quality.
Multi-Model Strategy & LLM Optimization
Work across multiple LLM providers to tailor prompt strategies.
Develop routing logic and adaptation layers to optimize quality, latency, and cost.
Monitor and adjust prompts with model updates or provider changes.
RAG & Context Management
Design prompts leveraging retrieval-augmented generation for grounded, accurate responses.
Manage multi-turn conversations, context windows, and dynamic content integration.
Collaborate with engineering to improve retrieved content formatting and ranking.
Cross-Functional Collaboration & Knowledge Sharing
Partner with product, engineering, research, and content teams to align prompts with user needs.
Build feedback loops connecting real-world interactions to prompt iteration cycles.
Document prompt engineering patterns, best practices, and lessons learned.
Responsible AI & Output Safety
Ensure privacy-first compliance and safe prompt design.
Design guardrails, filters, and fallback instructions to prevent harmful or biased outputs.
Test against adversarial inputs and champion responsible AI practices.
Required Qualifications
2+ years of experience in prompt engineering, NLP, conversational AI, or related roles.
Hands-on experience with LLMs (OpenAI, Anthropic, Google AI, or open-source models).
Strong expertise in prompt engineering techniques: zero-shot, few-shot, chain-of-thought, RAG, and role-based prompting.
Proficiency in Python for testing, automation, and analysis.
Experience with prompt evaluation frameworks, systematic experimentation, and iterative improvement.
Education
Bachelor’s degree in Computer Science, Computational Linguistics, NLP, Data Science, or related fields.
Portfolio of prompt engineering work preferred.
Preferred Qualifications
Real-time AI, conversational AI, or latency-critical prompt experience.
Multi-modal or speech-to-text prompt experience.
Experience with agentic prompt architectures, tool-use prompts, or multi-step reasoning chains.
Background in linguistics, creative writing, journalism, or content strategy.
Open-source contributions, published research, or public portfolios.
Startup or high-growth environment experience.
What We Offer
Equity: Early-stage ownership in a category-defining AI product.
Impact: Your prompts shape AI responses for 1M+ users.
Team: Lean, ambitious, collaborative environment.
Flexibility: Remote-first with optional co-working in NYC.
Growth: Rapid learning and career growth in a bootstrapped company.
Culture: User-obsessed, feedback-driven, and fast-paced.
Why Join LockedIn AI?
Category-defining product: Dual-layer AI copilot + human assist model.
Massive market: #1 rated AI career platform with 1M+ users.
High-leverage role: Small changes in prompts create massive impact on product quality.
AI-native environment: Work across frontier LLMs daily and experiment with cutting-edge techniques.
How to Apply
Submit:
Email Resume or CV to info.lockedinai@gmail.com
A brief note explaining: Why you want to join LockedIn AI
Whether you’ve tried the app
Suggestions for improvement
Optional portfolio, GitHub, or technical writing