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AI Engineer

Hytech · Singapore

About this role

Hytech is seeking a hands-on AI Engineer to design, build, and deploy practical, production-ready AI solutions within their Customer Service ecosystem. This role focuses on translating operational pain points into effective AI-driven workflows rather than pure research. Responsibilities include developing AI Agents, LLM-powered workflows, RAG systems, and intelligent decisioning engines integrated with CRM and automation platforms. Key Duties: Design and develop AI Agents capable of reasoning, tool calling, and multi-step task execution. Implement production-ready LLM applications using prompt engineering, context management, and orchestration. Build and optimize RAG-based knowledge retrieval systems, including improving retrieval quality and grounding. Develop decision intelligence logic for intent classification and intelligent routing. Collaborate with automation teams to integrate AI with Zendesk, CRM systems, and internal APIs. Establish systematic evaluation frameworks to monitor accuracy, latency, hallucinations, and business outcomes. Manage the full lifecycle of AI use cases from business problem identification to production deployment and continuous improvement. Requirements: Bachelor’s degree in Computer Science, AI, Data Science, or related field. Minimum 3 years of relevant software engineering or applied AI experience. Proficiency in Python and experience with LLM APIs or open-source models. Practical knowledge of RAG, vector search, structured outputs, and function calling. Strong understanding of REST APIs, JSON, and backend frameworks like FastAPI. Ability to independently manage projects from prototype to production and work directly with business stakeholders.

For full details about this role, click “Apply on company site” to view the employer’s original posting.

Skills for this role

PythonLLM APIsOpen-source LLMsPrompt EngineeringRAGEmbeddingsVector SearchFunction CallingTool CallingLLM EvaluationREST APIsJSONFastAPISystem IntegrationBackend Development

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Get interview-ready for this role

A focused preparation guide, built around this job’s responsibilities and requirements.

✦ AI-generated guide
Preparation suggestions, not the employer’s actual interview questions. Always check the original posting for current requirements.
01

Understand the role

What matters most

  • Production-Ready Agentic Workflows

    The role prioritizes building functional AI agents that perform multi-step tasks and tool calling over experimental research. You must demonstrate the ability to design robust, reliable workflows that integrate with existing CRM and Zendesk systems to solve real-world customer service operational pain points.

  • Systematic Evaluation and Quality Control

    A core priority is establishing frameworks to monitor accuracy, latency, and hallucinations. You will be expected to build test datasets and feedback loops to ensure AI performance meets business outcomes, moving beyond simple prototype development to continuous production improvement.

  • End-to-End Stakeholder Collaboration

    You must bridge the gap between technical implementation and business needs by working directly with Customer Service and Automation teams. This requires translating operational problems into technical requirements and managing the full lifecycle of a project from identification to deployment.

  • RAG System Optimization

    Improving retrieval quality is critical for the company's knowledge-based solutions. You need to demonstrate expertise in chunking, metadata management, and grounding to ensure that AI responses are accurate and properly cited based on internal SOPs and policies.

Likely challenges to think through

  • Balancing Autonomy with Risk Management

    Building AI agents that execute multi-step tasks creates a risk of unintended actions. Prepare to discuss how you implement human-in-the-loop mechanisms, confidence thresholds, and exception handling to ensure safe, reliable automation in a customer-facing environment.

  • Integration Complexity in Legacy Ecosystems

    Integrating AI with existing CRM and Zendesk platforms often involves dealing with brittle APIs and complex data structures. Prepare by highlighting your experience with REST APIs, JSON, and backend frameworks like FastAPI to ensure seamless communication between your AI logic and the company's operational infrastructure.

  • Defining Success for Non-Deterministic Systems

    Moving from rule-based automation to AI-driven decisioning makes performance measurement difficult. You may face challenges in defining clear metrics for 'intent accuracy' or 'task completion.' Prepare by explaining how you design evaluation frameworks that provide actionable insights rather than just raw logs.

03

Practice your answers

Technical practice

Designing Agentic Workflows

What to coverExplain your approach to building AI agents that require multi-step reasoning and tool calling. Focus on how you manage state, handle tool execution errors, and ensure the agent stays within defined operational guardrails.

Optimizing RAG Systems

What to coverDescribe your process for improving retrieval quality in a RAG pipeline. Discuss techniques for chunking strategies, metadata filtering, and how you ensure the model remains grounded in the provided context to minimize hallucinations.

LLM Evaluation Frameworks

What to coverHow do you systematically evaluate an LLM application before and after deployment? Address the metrics you prioritize, such as latency, accuracy, and cost, and explain how you build test datasets to validate business outcomes.

Integrating AI with CRM and APIs

What to coverDiscuss the challenges of integrating AI agents with existing systems like Zendesk or internal APIs. Focus on how you handle authentication, data serialization (JSON), and ensuring reliable communication between the AI and backend services.

Intent Classification and Routing

What to coverHow do you design decision logic for routing customer queries between AI, automation, and human agents? Explain how you determine confidence thresholds and handle edge cases where the AI should defer to a human.

Structured Output and Function Calling

What to coverWhen building applications that require structured data, how do you ensure the LLM consistently returns valid JSON? Discuss your experience with schema enforcement and handling scenarios where the model fails to follow the requested format.

Productionizing AI Prototypes

What to coverDescribe the transition from a PoC to a production-ready system. Suggestion: Focus on your experience with monitoring, logging, and implementing feedback loops to continuously improve model performance in a live environment.

Managing Context in LLM Applications

What to coverHow do you manage conversation history and context window constraints in long-running customer service interactions? Explain the trade-offs between different context management strategies like summarization versus sliding window approaches.

Behavioural practice

Translating Business Pain Points to AI

What to coverDescribe a time you identified an operational problem and proposed an AI-driven solution. Use the STAR method to explain how you gathered requirements from non-technical stakeholders and translated them into a technical implementation plan.

Handling Project Ambiguity

What to coverTell me about a project where you had to manage the full lifecycle from prototype to production independently. How did you prioritize features and manage stakeholder expectations when faced with technical or business constraints?

Collaboration with Non-Technical Teams

What to coverGive an example of working closely with Customer Service or operational teams to refine an AI tool. How did you incorporate their feedback into your development process to ensure the tool actually improved their workflow?

Managing AI Failure and Risk

What to coverDescribe a situation where an AI solution you built performed unexpectedly or failed in production. How did you diagnose the issue, communicate the impact to stakeholders, and implement a fix or human-in-the-loop safeguard?

02

Sharpen your knowledge

Topics to prepare

  • Agentic Workflow Design

    Focus on designing multi-step task execution where an AI agent must reason, select tools, and handle exceptions. Exercise: Draft a flowchart for a customer service agent that retrieves order status via API, checks a refund policy, and decides whether to escalate to a human based on a confidence threshold.

  • Production AI Evaluation Frameworks

    Understand how to measure system performance beyond simple accuracy. Exercise: Define a set of metrics to monitor for a RAG system, specifically focusing on hallucination rates, retrieval latency, and business-specific outcomes like task completion rate.

  • RAG Grounding and Retrieval Quality

    Study techniques to improve the relevance of retrieved knowledge. Exercise: Compare different chunking strategies and metadata tagging methods for a set of internal SOP documents to see how they impact the precision of LLM-generated answers.

Skills to revise

  • FastAPI and REST API Integration

    Build robust backend services that connect LLMs to external systems. Exercise: Create a FastAPI endpoint that accepts a JSON payload, triggers a function call to an external CRM API, and returns a structured response to an AI agent.

  • Function and Tool Calling

    Implement structured outputs to allow LLMs to interact with software. Exercise: Develop a Python script using an LLM API that defines a set of tools (e.g., get_user_data, update_ticket_status) and demonstrates the model correctly selecting and formatting the arguments for these tools.

  • Prompt Engineering for Structured Output

    Master the ability to force LLMs to return consistent, machine-readable formats. Exercise: Refine a system prompt to ensure an LLM consistently outputs JSON for intent classification, including specific fields for 'intent_category', 'confidence_score', and 'required_action'.

04

Your preparation checklist

  • Prepare a RAG system project walkthrough

    Develop a concise presentation of a RAG system you have built, focusing on retrieval quality, chunking strategies, and how you handled grounding or citations. Be prepared to explain how you evaluated the retrieval accuracy and addressed hallucinations.

  • Demonstrate agentic workflow design

    Create a technical summary of an AI agent project that utilized tool calling or multi-step reasoning. Highlight how you managed state, handled API integrations, and implemented human-in-the-loop mechanisms for high-risk tasks.

  • Develop an evaluation framework strategy

    Outline a systematic approach for monitoring production AI performance. Include specific metrics you would track for a customer service bot, such as latency, intent classification accuracy, and business-specific KPIs like task completion rates.

  • Review CRM and API integration patterns

    Prepare to discuss your experience integrating AI services with external platforms like Zendesk or CRMs using FastAPI. Focus on how you handle authentication, JSON data structures, and robust error handling in production environments.

  • Formulate questions for business stakeholders

    Prepare thoughtful questions regarding Hytech's current customer service pain points, the existing automation stack, and how the team balances rapid prototyping with the need for production-grade stability and security.

AI-generated from the job information · Prepared Oct 13, 2026 (UTC)Useful preparation, not a guarantee of eligibility or an offer.

Availability last checked: 18 Oct 2026. Status can change after a check; confirm on the employer’s website. Report an issue · Our checking policy

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