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Fix AI Interview System (Gemini API + TypeScript) | LLM Optimization & Backend Stability **Project Description** We are building an AI-powered interview platform that conducts structured interviews, evaluates candidate responses, and provides scoring using the Gemini API. Currently, we are facing multiple issues with AI response quality, consistency, and system reliability, and we are looking for an experienced LLM / Generative AI Engineer to fix and optimize the system. **Current Problems** Inconsistent AI responses during interviews Poor structured output (JSON breaking / invalid formats) Weak evaluation logic (incorrect scoring / feedback) Prompt instability across sessions Latency issues and delayed responses Occasional irrelevant or hallucinated answers Difficulty maintaining context in multi-step interviews **Scope of Work** The freelancer will: 1. Prompt Engineering & AI Optimization Improve prompts for consistent, accurate responses Design structured output formats (strict JSON responses) Reduce hallucinations and irrelevant outputs Implement prompt chaining / system prompts 2. AI Evaluation System Improvement Fix scoring logic for candidate answers Improve evaluation consistency Ensure reliable feedback generation 3. Gemini API Integration Fixes Debug and optimize Gemini API usage Handle rate limits, retries, and failures Improve response time and streaming (if applicable) 4. Backend Stability (TypeScript / Node.js) Fix API orchestration issues Improve session/context handling Ensure smooth multi-step interview flow 5. Guardrails & Validation Enforce structured outputs (JSON schema validation) Add fallback and retry mechanisms Improve overall system reliability Tech Stack TypeScript / Node.js Gemini API (Google AI) REST APIs / possibly WebSockets JSON-based evaluation system *Requirements (MUST HAVE) Strong experience with LLMs (Gemini / OpenAI / Claude) Proven work in AI-based applications (chatbots, evaluation systems, etc.) Expertise in prompt engineering & structured outputs Experience with Node.js / TypeScript backend systems Understanding of AI limitations, hallucinations, and guardrails Nice to Have Experience building AI interview / assessment platforms Knowledge of RAG, embeddings, or evaluation frameworks Experience with real-time systems Deliverables Stable and consistent AI interview responses Structured and valid JSON outputs Improved evaluation accuracy Reduced latency and failures Clean, maintainable code improvements Project Type Short-term (initial fix: 1–2 weeks) Possibility of long-term collaboration To Apply, Answer This (Important — this filters bad freelancers) Have you worked with Gemini or other LLM APIs? Explain briefly How do you ensure structured JSON output from LLMs? How do you reduce hallucinations in AI responses? Share a similar project you’ve worked on
Projektin tunnus (ID): 40340664
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35 freelancerit tarjoavat keskimäärin ₹8 057 INR tätä projektia

With a thriving expertise in AI model development and backend system engineering using Node.js, I am your go-to professional for ensuring a stable and smooth experience on your AI-powered interview platform. Being well-versed with Gemini API and other LLM APIs, I have consistently delivered reliable and scalable solutions by meticulously handling rate limits, retries, and failures. My approach to reducing hallucinations in AI responses rests on a deep understanding of the limitations that LLMs may exhibit; hence it includes implementing stringent guardrails and rigorous validation strategies. This knowledge has also equipped me to diligently design structured outputs that strictly adhere to JSON schema, minimizing formatting issues that seemed to plague your current setup. Should you decide to collaborate, I commit to delivering tangible solutions within the projected timeline without compromising on code quality or maintainability. Let’s transform your interview system into an unruffled operation and build a long-lasting partnership!
₹12 000 INR 5 päivässä
4,9
4,9

Hello, I’ve worked with Gemini, OpenAI, and Claude APIs in production systems including structured evaluation pipelines and multi-step conversational flows. I’ve built LLM-driven tools where consistency and JSON reliability were critical, including scoring systems and decision engines. For structured JSON output, I enforce schema-first generation using strict prompt templates, few-shot examples, and post-validation with a JSON schema validator. I also implement response repair layers that re-prompt or correct invalid outputs before passing them downstream. To reduce hallucinations, I use constrained prompts, explicit instruction boundaries, temperature control, and context anchoring. I also add guardrails such as answer verification, fallback prompts, and in some cases retrieval-based grounding to keep responses aligned with expected data. I’ve worked on an AI evaluation system that scored user responses with consistent outputs, where I improved accuracy and reduced invalid JSON responses by introducing prompt chaining, structured templates, and retry logic with validation. I can stabilize your system by restructuring prompts, enforcing strict output formats, improving session/context handling, and optimizing API orchestration for reliability and latency.
₹7 000 INR 7 päivässä
4,6
4,6

As an experienced AI developer with an extensive background in building and optimizing AI-based systems, I am well-positioned to tackle each of the challenges your project faces. With regard to the Gemini API and LLMs, I have not only worked with them extensively, but have used similar APIs, such as OpenAI and Claude, to build chatbots and evaluation systems, which serve as critical relevant experience for this project. In terms of generating structured JSON outputs and reducing hallucinations in AI responses, I bring deep expertise in prompt engineering and a thorough understanding of AI limitations. This includes enforcing structured outputs through JSON schema validation, adding fallback and retry mechanisms, and utilizing guardrails to enhance overall system reliability. One remarkable project where I employed these skills was at Google where I handled complex codebases and integrated sophisticated AI solutions. My approach centers on deeply understanding your unique challenges and devising efficient solutions that yield consistent results quickly. As such, you can expect clean code improvements that lead to stable interview responses, improved evaluation accuracy, reduced latency and failures, as well as structured valid JSON outputs – essential assets for your platform's success. Let's get started today!
₹7 000 INR 7 päivässä
4,9
4,9

Hi there, Strong alignment with this project comes from experience optimizing LLM-based systems with structured outputs, prompt engineering, and stable backend orchestration. Clear understanding of the requirement to fix Gemini-based interview flows, improve JSON reliability, reduce hallucinations, and stabilize multi-step context handling. Hands-on expertise with Node.js, TypeScript, and LLM integrations ensures consistent responses, validated outputs, and improved latency. Risk is minimized through structured prompt design, schema validation, retry logic, and robust session management. Available to start immediately happy to discuss approach or share similar work. Recent work: https://www.freelancer.com/u/chiragardeshna Regards Chirag
₹7 000 INR 7 päivässä
4,5
4,5

I understand the challenges you’re facing with your AI interview platform and I believe my skills and experience make me well-suited to tackle them head-on. As an AI and Full-Stack Developer, I have sharp prowess with LLMs and AI technologies - including Gemini, OpenAI, and Claude APIs - which matches your project's needs precisely. In fact, over my 7+ years' career, I've successfully built AI applications including chatbots, evaluation systems and more. Specifically addressing your Task 1, I've extensive practice with prompt engineering in order to obtain consistent responses with greater accuracy while best reducing hallucinations. As for Task 2, improving AI evaluation consistency and enhancing scoring logic in ways that generate reliable feedback are strong suits of mine. Task 3 entails debugging and optimizing Gemini API usage; my familiarity with it puts me in a prime position to streamline its usage. Moreover, my TypeScript/Node.js mastery will strengthen the backend's stability by fixing API orchestration issues efficiently. I will also ensure smooth multi-step interview flows by improving session/context handling. Enforcing structured JSON outputs, reducing latency, adding fallback and retry mechanisms are just a few more attributes that set me apart from others
₹12 000 INR 7 päivässä
3,2
3,2

Hello, I would like to grab this opportunity and will work until you are 100% satisfied with my work. I am an experienced professional with many years of hands-on experience in Node.js, JSON, Typescript, Backend Development, API Integration, REST API, Prompt Engineering, Generative AI, AI Model Development Please come over chat and discuss your requirement in a detailed way. Regards, Rajesh Rolen
₹7 000 INR 7 päivässä
2,4
2,4

With an extensive background in node.js and a proven track record in AI-driven projects, I am confident in my ability to optimize your AI Interview Platform. My experience with Gemini API and similar LLM systems makes me an ideal candidate for fixing the inconsistency, hallucination, and latency issues currently affecting your system. Additionally, I have a deep understanding of prompt engineering and structured output, which aligns perfectly. One area any optimizer developer never compromises on is the evaluation system. Drawing from my experience in building AI-based applications including chatbots and evaluation systems, I will squash the scoring logic bugs that have been plaguing your platform. Moreover, my skill set extends beyond backend development; My knowledge of TypeScript enables me to fuse LLM optimization with backend stability thereby fixing API orchestration issues and improving overall system reliability. This holistic approach to project management has seen me build maintainable, clean code bases throughout my career.
₹8 600 INR 8 päivässä
2,1
2,1

I see you're facing significant challenges with your AI interview platform, particularly around inconsistent responses, poor structured outputs, and backend stability. With over 12 years of experience in developing and optimizing complex systems using technologies like TypeScript and Node.js, I can help resolve these issues effectively. My expertise in LLMs, including Gemini API, allows me to enhance prompt engineering for consistent responses while ensuring valid JSON outputs. I have successfully worked on AI-powered applications that involved improving evaluation logic and reducing hallucinations through tailored prompt strategies. Additionally, my background in implementing robust backend solutions will ensure a smooth multi-step interview flow. To further streamline your project, I'm keen to understand how you currently handle the context in multi-step interviews? This insight could enhance our collaboration and lead to a more effective solution. Looking forward to the opportunity!
₹12 500 INR 7 päivässä
2,0
2,0

Hi there, I have extensive experience working with LLM APIs, including Gemini and OpenAI, and I specialize in building reliable AI systems with structured outputs. For your interview platform, I will focus on improving prompt engineering, implementing strict JSON schema validation, and ensuring that candidate responses are evaluated consistently and accurately. My approach will directly address hallucinations, context loss, and latency issues to deliver stable and relevant AI answers. On the backend side, I will optimize your TypeScript/Node.js architecture to handle multi-step interview sessions smoothly, implement robust retry and fallback mechanisms for API calls, and ensure prompt chaining works consistently. I’ve previously enhanced AI evaluation systems for assessment platforms, improving scoring logic and generating reliable feedback with minimal errors. I will deliver a system where AI responses are accurate, structured, and fast, with reduced failures and clear evaluation outputs. This will not only stabilize your current platform but also lay the groundwork for scalable long-term improvements. Regards, Ahmad
₹7 000 INR 7 päivässä
1,7
1,7

Hi there! I have carefully reviewed your project description for optimizing the AI Interview Platform using the Gemini API and TypeScript. I understand the need for fixing the current issues with AI response quality, consistency, and system reliability. My experience with LLMs, prompt engineering, and backend systems aligns well with the requirements of this project. One question I have is: How do you envision the integration of Gemini API improvements impacting the overall system stability and performance? In a previous project, I worked on enhancing an AI chatbot's response accuracy and reliability by implementing structured output formats and improving evaluation consistency. This project involved similar challenges and required a deep understanding of AI limitations and prompt engineering. I am confident that my expertise can contribute to achieving stable and consistent AI interview responses, structured JSON outputs, and improved evaluation accuracy for your platform. Thanks, Tejbir Bhatia
₹7 000 INR 7 päivässä
0,0
0,0

Hi, I can fix your AI interview platform's Gemini API integration and optimize the LLM responses. I've worked extensively with OpenAI and Google's Gemini APIs in production systems, including building AI-powered tools that require consistent structured outputs. For your specific issues: **Structured JSON Output**: I enforce strict JSON schemas using Zod validation, implement retry logic with exponential backoff, and use system prompts that explicitly define the expected output format. For Gemini, I've found that combining response_mime_type="application/json" with clear schema examples in the prompt dramatically improves consistency. **Reducing Hallucinations**: I use prompt chaining to break complex evaluations into smaller, focused steps, implement guardrails with validation layers, and add context windows that maintain interview state without overwhelming the model. Temperature tuning and top-p sampling also help maintain relevance. **Backend Stability**: Your TypeScript/Node.js stack is familiar territory - I'll implement proper error handling, rate limit management with queue systems, and session persistence to maintain context across multi-step interviews. I've built similar evaluation systems where AI consistency and scoring accuracy were critical. I can deliver stable, production-ready improvements within your 1-2 week timeline. Ready to start immediately. Victor
₹12 130,25 INR 10 päivässä
0,0
0,0

Hi there, You’re in the RIGHT PLACE! I’ve worked on SIMILAR PROJECTS multiple times and understand how to deliver this EFFICIENTLY and CORRECTLY from the start. While I’m NEW to Freelancer.com, I bring 17+ YEARS OF EXPERIENCE from other freelancing platforms, successfully delivering HIGH-QUALITY PROJECTS and REAL RESULTS for clients. To provide an accurate SCOPE, TIMELINE, and COST, I’d like to ask a few KEY QUESTIONS. Due to Freelancer’s character limit, it’s difficult to cover everything here. Let’s connect in CHAT so I can: • Share RELEVANT PAST WORK • Understand your EXACT REQUIREMENTS • Propose a CLEAR and EFFECTIVE ACTION PLAN I’m confident you’ll find my approach PRACTICAL, TRANSPARENT, and RESULTS-DRIVEN. If you're ready to get this done the RIGHT WAY, I’d be happy to get started. Looking forward to CONNECTING with you. Best regards, Amit Ranjan
₹7 000 INR 7 päivässä
0,0
0,0

I saw your project and am confident I can deliver on this. I'm currently working on a similar project and understand the importance of stable AI responses, structured JSON outputs, and accurate evaluations. By optimizing the Gemini API, improving prompt engineering, and enhancing evaluation consistency, I will ensure the system's reliability and performance. With my expertise in LLMs, AI-based applications, and Node.js systems, I am well-equipped to tackle the challenges outlined in the project description, providing you with a robust and efficient AI interview platform. I invite you to view my portfolio, which showcases the quality and results of my past work. I look forward to hearing from you. Regards, Sadiya
₹6 000 INR 7 päivässä
0,0
0,0

Hi there, I'm Hemant, a freelance **Generative AI Engineer** with deep expertise in Node.js/TypeScript backend systems. Your project to optimize your AI interview platform, particularly tackling the Gemini API inconsistencies, poor structured outputs, and evaluation logic, immediately caught my attention – it's precisely the kind of challenge I excel at. I specialize in fine-tuning LLM interactions, crafting robust prompts for consistent, hallucination-free responses, and enforcing strict JSON output using validation and intelligent prompt engineering. My background in TypeScript ensures I can dive deep into your backend for stability, context handling, and improved latency. I'm confident I can quickly diagnose and implement fixes for your current problems, delivering a reliable, high-quality interview experience. I'd love to discuss how my expertise can stabilize your platform efficiently. Best, Hemant
₹10 000 INR 30 päivässä
0,0
0,0

Hi, I noticed you're looking for an app development service. I can help with that. Let's discuss your requirements.
₹7 000 INR 10 päivässä
0,0
0,0

Hello there, Worked extensively with Gemini, OpenAI, and Claude APIs on structured-response systems, multi-turn evaluation workflows, and AI assessment platforms where consistency, valid JSON outputs, scoring accuracy, and low-latency responses were critical to production stability. The immediate optimization will focus on: • Prompt stabilization for consistent interview responses • Strict JSON schema validation and fallback retries • Scoring logic and feedback accuracy improvements • Context retention across multi-step interview sessions • Latency, rate-limit, and backend stability fixes • Guardrails to reduce hallucinations and irrelevant outputs Can quickly review the current prompt flow and backend orchestration to identify the exact points causing response instability and invalid JSON outputs. Looking forward, Nikunj
₹7 000 INR 7 päivässä
0,0
0,0

By partnering with me, you're enlisting the services of a proven problem-solver and architect of scalable, resilient systems. I bring over three years of rich experience in developing high-performance backends using Node.js, which matches perfectly with the project requirements. My expertise in prompt engineering and structured outputs will ensure consistent, reliable, and well-formatted responses from the AI throughout an interview. As such, mitigating the inconsistency, poor JSON formatting, as well as reducing irrelevant or hallucinated answers should pose no significant challenge. Moreover, having successfully leveraged Gemini and other LLM APIs in previous projects, my familiarity with their functionalities and usage intricacies set me apart. I possess a refined understanding of AI limitations including hallucinations, guardrails and redundancy to guarantee you stable interviews with reduced latency and minimal system failure occurrences. To satisfy your crucial backend stability needs within this project I am adept at orchestrating APIs and skilled in session/context handling for effective flow in multi-step interviews.
₹8 500 INR 7 päivässä
0,0
0,0

I am an experienced Generative AI Engineer specializing in TypeScript/Node.js and LLM orchestration. I have extensive experience fine-tuning Gemini’s performance, specifically addressing the technical hurdles you’ve outlined like JSON drift and context decay. My Strategic Approach: Prompt Engineering & Structural Integrity: I will implement System Instructions and Few-Shot Prompting to stabilize Gemini’s personality. To solve JSON breakages, I utilize Gemini’s "Response MIME Type" (JSON Mode) or Zod-based schema validation to ensure 100% parseable outputs. Evaluation Logic: I will move away from "one-shot" grading to Chain-of-Thought (CoT) evaluation, forcing the model to justify scores against rubrics before outputting a final grade. This drastically reduces hallucinations and improves consistency. Backend Stability: I’ll optimize your session management using Redis or robust database state tracking to ensure context is never lost during multi-step interviews. I will also implement exponential backoff for rate-limit handling.
₹10 000 INR 14 päivässä
0,0
0,0

Hello, I can optimize your AI interview system (Gemini API + TypeScript) for consistent responses, accurate scoring, and stable backend performance. What I can help you with: • Prompt optimization & structured JSON outputs • Reliable evaluation logic and feedback • Backend stability and latency improvements I’ve worked with Gemini, OpenAI, and Claude APIs, ensuring strict JSON output and reducing hallucinations via strong prompts and validation. I’ve built AI evaluation systems with multi-step context and consistent results. Warm regards, Monica Bhatia
₹7 000 INR 5 päivässä
0,0
0,0

Hello, I can help stabilize and improve your AI interview system so it delivers consistent, structured, and reliable results. I’ve worked a lot with LLM-based applications and have hands-on experience with prompt engineering and Node.js/TypeScript backends. I’ve used APIs like Gemini, OpenAI, and Claude to build chatbots and evaluation systems, so I’m familiar with the exact issues you’re facing—like inconsistent responses, broken JSON outputs, and unreliable scoring. For structured JSON, I usually combine strong system prompts with clear schemas, validation (like Zod), and retry logic to catch and fix invalid outputs automatically. This keeps everything clean and production-ready. To reduce hallucinations, I focus on tightening prompts, controlling context, and using more deterministic settings. I also add guardrails and fallback logic so the system behaves predictably, even in edge cases. I’ve built similar systems before, including AI chatbots and evaluation tools that generate structured feedback and scores. A big part of that work was fixing instability issues and making the outputs consistent and usable.
₹4 000 INR 7 päivässä
0,0
0,0

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