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How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

How to Build an Ideal Tech Stack for LLM Applications

Last Updated

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Jun 24, 2025

Rishav Hada

By

Rishav Hada
Rishav Hada
Rishav Hada

Time to read

19 mins

How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration
How to Build an Ideal Tech Stack for LLM Applications: A Complete Guide to Data Pipelines, Embeddings, and Orchestration

Table of Contents

TABLE OF CONTENTS

  1. Introduction

How we go about our work and connect with others is changing fast, thanks to LLM-powered apps. Think about your own day, how many of your tasks now involve asking an AI for help?

LLM tools have jumped into the spotlight across so many areas. ChatGPT, for example, empowers millions to draft fresh ideas and tackle tough questions in seconds. Duolingo leans on GPT-4 to give you instant, tailored feedback on your language exercises. Khan Academy’s “Khanmigo” chatbot makes learning feel more like a two-way conversation. On the dev side, GitHub Copilot predicts your next lines of code so you can stop worrying about boilerplate. Even in health, Movano’s EvieAI built into the Evie smart ring draws on over 100,000 medical papers to offer you reliable wellness tips. And it’s not just Silicon Valley in the race: Chinese firms like ByteDance (with Doubao) and Alibaba (with Qwen) are rolling out powerful, budget-friendly chatbots that keep Western giants on their toes. All these examples show just how woven LLMs are into our routines and businesses today.

These AI services are still fast and reliable, even though more and more people are using them. This is because they have a strong tech setup. GitHub's engineers use both GPT-4 and GPT-3.5 Turbo when they need quick code suggestions to keep things running smoothly. In finance and healthcare, for example, safe data pipelines and strong cloud platforms mean that models like EvieAI can get new information without any risk. It's easy to fix problems and add new data to these systems because they are modular. When teams have a stable base, they can grow without making things slower. Less time spent not working builds trust. By connecting everything from how data comes in to how APIs respond, companies save money and give users a better, safer experience. In short, these cutting-edge AI apps can grow and thrive because they have a smart tech backbone, even as millions of new users join.

In this blog, you’ll find a clear, step-by-step guide to picking the right tools and practices for building LLM applications that grow seamlessly with your needs.


  1. LLM capabilities

Large language models (LLMs) have become incredibly versatile for real-world use, thanks to their transformer-based designs that “understand” and generate text. Companies are weaving OpenAI’s GPT-4 into their customer-service workflows so they can answer routine questions faster and more accurately. T-Mobile, for example, teamed up with OpenAI to build IntentCX, an AI-powered helper that smooths out support interactions. On the developer side, GitHub Copilot taps into an LLM to suggest code snippets and catch errors as you type. Because these models can learn right in the flow of a conversation or be fine-tuned on special data, the possibilities go even deeper. A bank might train an LLM on its internal market reports to churn out smart investment summaries. Law firms lean on LLMs’ ability to process massive “context windows” to review long contracts or case files in seconds. From drafting marketing copy to powering chatbots, LLMs keep proving they can deliver context-aware, coherent responses across all sorts of industries.

Key Components in LLM Applications

  • Data Ingestion & Preprocessing: First, you need to pull in huge volumes of raw text—everything from research papers to social-media posts and clean it up. That means removing noise, normalizing formats, and structuring it so the model can learn effectively. For instance, chatbots get smarter when their underlying FAQ databases are well organized and free of duplicates.

  • Embedding Generation and Retrieval: Next, the system converts text into numerical “vectors” that capture meaning. Vector databases like Pinecone or Weaviate store these embeddings so you can quickly find similar content. Grammarly’s writing suggestions, for example, work by comparing your sentence vectors against millions of examples to offer spot-on edits in real time.

  • Orchestration and Prompt Management: In production, multiple LLM services often have to talk to each other and to external data sources without dropping the ball. Kubernetes based orchestration platforms handle that choreography. A banking app might use this layer to merge live market data with AI prompts, ensuring that when you ask about your balance or a recent transaction, the response is accurate and up to date.

  • Deployment, Monitoring, and Scaling: Finally, you run your LLMs on cloud platforms like AWS or Google Cloud so they can flex up when traffic spikes. Services such as Amazon Bedrock take care of provisioning, autoscaling, and keeping latency low. That way, you keep costs in check, maintain fast responses, and stay reliable—even at peak loads.

All of these parts are necessary to turn LLM technology into reliable, useful apps that solve real-world problems like helping companies automate support tasks and developers write better code.


  1. Data Pipeline and Preprocessing Layer

The foundation of successful LLM applications is a well-designed data pipeline and preprocessing layer, which collects, cleans, and converts data into high-quality inputs for embedding creation.

3.1 Data Ingestion Strategies

Building a robust data pipeline begins with the collection of a wide range of data types from many different places.   Businesses frequently mix unstructured data from papers or web pages, semi-structured data like logs and JSON files, and structured data from databases. Unstructured libraries are used to process multimedia and free text inputs, while ETL tools like Dagster and Airflow are frequently used to schedule and manage these workflows. This method ensures perfect formatting of every data type for downstream applications.

  • Heterogeneous Sources: Integrate raw text files, JSON records, and SQL databases.

  • Frameworks for ETL: To handle data loading, processing, and extraction, use Airflow or Dagster.

  • Unstructured Libraries: Use tools that clear and parse multimedia and free text data.

3.2 Preprocessing & Chunking Techniques

Preparing data for embedding and modeling depends deeply on preprocessing. Data must be cleaned, duplication must be eliminated, and inputs must be divided into smaller, more manageable chunks. Dynamic chunking techniques change the chunk size depending on the kind of content—text, graphics, code, or another. Such methods contribute to the enhancement of embedding quality by reducing noise and preserving context.

  • Dynamic Chunking: Automatically adjust the size of the chunks for text, images, or code.You can set rules that change the chunk size to fit your needs in libraries like LangChain.

  • Cleaning: Standardize formats and remove any unnecessary characters. For example, NLTK has easy methods that can be used to remove unwanted parts of text, making it more uniform and easier to work with.

  • Deduplication: Find and remove bias-inducing duplicated material.

  • Transformation: Transform unprocessed data into consistent formats that are suitable for embedding.

3.3 Embedding Generation

Raw data is transformed into numerical vectors that convey significance through embedding generation. Models such as OpenAI's text-embedding-ada-002, Cohere Embed v3, and Sentence Transformers are popular choices, each with its own strengths. When picking an embedding model, think about how speed, cost, and how easy it is to integrate all compare to each other. Self-hosted solutions give more control over data protection and customizing; hosted API solutions offer simplicity and scalability.

  • Model Comparison: Assess the performance of OpenAI, Cohere, and Sentence Transformers compared with the requirements of the task.

  • Hosted vs. Self-hosted: Self-hosted options provide complete control, while hosted APIs are simple to implement.

  • Quality vs. Cost: Try to maintain a balance between the computational and financial costs of embedding quality.

  • Integration: Provide flawless embedding conversion for several downstream tasks.

3.4 Storage and Vector Databases

Embeddings must be stored efficiently to ensure that they can be retrieved quickly and accurately. Quickly index and search embeddings using vector databases such Pinecone, Weaviate, Chroma, Faiss, and pgvector. Traditional search techniques, such as TF-IDF or BM25, can be combined with KNN methods to enhance retrieval efficacy in these systems. Scalability and latency management are essential in applications such as real-time interfaces and recommendation engines, where billions of vectors are processed.

  • Database Options: Based on your needs, select from Pinecone, Weaviate, Chroma, Faiss, or pgvector.

  • Hybrid Search: Optimize outcomes by integrating KNN with keyword-based methodologies (TF-IDF/BM25).

  • Indexing strategies: If you want to cut down on searching time for big datasets, use efficient indexing.

  • Scalability: Develop a strategy that prioritizes high throughput and low latency in multi-billion vector scenarios.

This layer provides the groundwork for seamless orchestration and application logic, which enables real-time decision-making and dynamic interactions, by maintaining that the data is appropriately ingested, preprocessed, and stored.

LLM application tech stack diagram: data pipeline ingestion, preprocessing, embedding generation, vector database storage

Figure 1: Data Pipeline and Preprocessing Layer


  1. LLM Orchestration and Application Logic

A strong orchestration and application logic layer controls service processes, agent coordination, and rapid design, connecting raw LLM capabilities to user-facing applications.

4.1 Design Patterns for In-Context Learning

In real-world applications, LLM performance is enhanced by the implementation of effective prompt design and retrieval strategies. Zero-shot prompts are used by developers to allow the model to respond without examples, few-shot prompts to guide behavior with a limited number of examples, and chain-of-thought prompts to encourage step-by-step reasoning. Retrieval augmented generation (RAG) is necessary as it retrieves pertinent data from vector databases to enable the output of the model. This method assists the model in producing responses that are more precise and context-aware, while simultaneously reducing the probability of errors.

  • Zero-shot prompts: The model's pre-trained knowledge is dependent upon; no examples are provided.

  • Few-shot prompts: Includes a few well-selected examples to guide output.

  • Chain-of-thought prompting: Reduces complex problems to a series of steps that can be used to analyze them.

  • RAG integration: Improves generated text by combining retrieved data from vector databases.

4.2 Agent Frameworks and Multi-Agent Architectures

Agent frameworks enable the coordination of multiple LLM instances for intricate tasks, which increases both performance and reliability. Modern tools, such as Microsoft AutoGen, AutoGPT, and LangChain, offer structured frameworks which allow the integration of large language models (LLMs) into applications. These tools make things easier to use, but they might not let you change things as much as you could with raw versions. Additionally, retrieval-augmented generation (RAG) and other alternative methods are being examined as a means of enhancing the efficacy of LLM by integrating external data sources. Another method includes the blending smaller models to achieve performance that is comparable to that of larger LLMs, which has the potential to improve resource usage and efficiency. These systems support self-reflection and recursion. Self-reflection lets agents look back at their answers and change them. Recursion lets them go back to earlier steps and improve them. Memory modules help agents to keep context across several turns of interaction.

  • Frameworks: AutoGPT, Microsoft AutoGen, and LangChain all give different levels of abstraction.

  • Raw control versus abstractions: Frameworks can hide low-level controls, but they improve development.

  • Self-reflection: Agents dynamically evaluate and enhance their outputs.

  • Recursion: Agents return to refine steps and ensure precision.

  • Memory integration: Maintains context for consistent, multi-turn interactions.

4.3 Orchestration Layer

The orchestration layer coordinates all components to ensure the seamless operation of LLM across services. Organizations could choose with a monolithic design for easier setups or a microservices architecture using API gateways and serverless capabilities for adaptability. Asynchronous LLM calls are managed by workflow engines and task schedulers such as Temporal.io, which ensure that tasks are executed in a timely and orderly manner. Caching solutions, including GPTCache and Redis, provide improved response times and reduce inference costs by storing frequently accessed data.

Microservices against monolithic: Choose depending on simplicity or requirement for adaptability.

Serverless features and API gateways: Make it possible to deploy services in a modular and scalable manner.

  • Workflow engines: Temporal.io organizes and schedules asynchronous tasks.

  • Strategies for caching: Redis or GPTCache minimize latency and reduce redundant computations.

  • Efficient orchestration: Supports the seamless interaction of each component, resulting in a more reliable and quicker service.

Organizations can establish a robust infrastructure, deployment, and scaling of LLM-powered solutions by implementing these design patterns, agent frameworks, and orchestration strategies, which will simplify LLM operations.


  1. Infrastructure, Deployment, and Scaling

Scaling Large Language Models (LLMs) effectively depends on a strong infrastructure. This includes making smart choices about hosting environments, techniques for continuous integration and release, and managing resources to get the best performance and lowest costs.

5.1 Cloud-Native vs. Self-Hosted Solutions

When choosing between self-hosted and cloud-native deployments, you must consider factors including cost, flexibility, and possible vendor lock-in. Cloud-native solutions, while providing scalability and simplicity of use, can result in increased long-term expenses and reliance on specific providers. Self-hosted setups give you more freedom and could save you money, but they are harder to handle. Technologies for containerizing containers like Docker and orchestration tools like Kubernetes help to enable consistent deployments across systems. Serverless platforms, such as Modal and RunPod, provide dynamic scalability without the need to manage the underlying infrastructure, providing a balance between operational overhead and flexibility.

  • Cost Factors: The operational costs of cloud-native solutions can increase over time.

  • Flexibility: Self-hosted deployments provide greater control over configurations.

  • Vendor Lock-In: Opting for a single provider can restrict future viable alternatives.

  • Containerization: Consistent environments are ensured by tools like Docker and Kubernetes.

  • Serverless Platforms: Modal and RunPod enable infrastructure management-free scalability.

5.2 CI/CD for LLM Pipelines

The development and deployment of LLMs are simplified by the implementation of Continuous Integration and Continuous Deployment (CI/CD) pipelines. The integrity of the system is preserved by automated testing, which ensures that modifications to the model or codebase do not introduce errors. In production environments, models are able to adapt to new data and evolving requirements through continuous evaluation and fine-tuning, which ensures sustained relevance and accuracy.

  • Automated Testing: Validates modifications to prevent errors.

  • Continuous Assessment: Models undergo routine evaluations to ensure that they satisfy performance criteria.

  • Production Fine-Tuning: Modifies models according to with real-world data.

  • Pipelines for Integration: Allows the transition from development to deployment workflows.

5.3 Resource Optimization

Management of LLM operating costs depends on effective use of resources. Faster inference and less resource use are made possible by methods such model quantization and distillation, which also help to cut processing needs by reducing model size. Multiple inference queries are grouped by dynamic aggregation, which enhances hardware usage and throughput. Combining performance with model size means evaluating the compromises between output quality and computational cost. Expanding context windows is one of the emerging trends that improves model capabilities but also raises resource requirements, requiring careful design and optimization techniques. 

  • Model Quantization: Decreases precision to reduce computational requirements.

  • Model Distillation: The process of generating small models that accurately reflect the performance of larger models.

  • Dynamic Batching: Optimizes processing efficiency by combining requests.

  • Performance Trade-Offs: Look at how the size of the model affects the quality of the result.

  • Expanding Context Windows: Improves understanding at less expense of resources.

Organizations can manage LLM infrastructure and scalability by carefully choosing deployment methodologies, putting strong CI/CD pipelines into use, and resource optimization. These methods improve performance and cost-effectiveness as well as provide the foundation for handling important security, privacy, and legal issues in AI implementations.


  1. Security, Privacy, and Regulatory Considerations

LLMs require a robust focus on regulatory compliance, privacy, and security to protect user data and ensure ethical use. Financial institutions secure customer information by GDPR and HIPAA by encrypting sensitive inputs and outputs, which is how data privacy measures are implemented. Prompt sanitization and input validation are two strategies that help to block threatening inputs and quick injection. A secure system is very important. To limit who can use LLM services, identity management and access control methods are set up, such as multi-factor authentication. Developers establish strong security protocols for APIs to protect vector databases that are used for embeddings and prevent unauthorized use. Redis with a secure setup is one of the solutions organizations use often to protect cached data and control access in multi-tenant systems. Finding problems and ensuring worldwide regulatory compliance depends on this degree of openness. Real-time monitoring and regular audits enable fast identification and reaction to possible breaches or misbehavior. Combining these techniques can help businesses create reliable AI systems while upholding high ethical standards and following data protection regulations. These steps prepare the ground for analyzing how infrastructure, deployment, and scalability could assist safe and effective LLM operations even further.


Conclusion

Large Language Models have changed the way we manage text, code, and data by integrating robust data ingestion, preprocessing, embedding, and orchestration mechanisms. A solid tech stack is built on clear data pipelines that combine data from different sources and quickly clean, chunk, and store it. Reliable, low-latency performance in demanding applications can be achieved by the implementation of best practices in vector database administration, embedding generation, and continuous integration. Together with agent frameworks and orchestration layers, design patterns for in-context learning help to provide a seamless flow from raw input to meaningful output. To discover what best fits their applications, developers are advised to play around with many prompt designs, agent strategies, and deployment options.   Contributing to open-source initiatives not only speeds up innovation but also promotes a community that is dedicated to enhancing the accessibility of LLMs.

The selection of appropriate tools and frameworks for each component is essential, as each option has its own set of advantages and limitations. Evaluate these alternatives within the context of your particular application to ensure that the technology platform is consistent with your objectives. Platforms like Future AGI provide thorough assessment and optimization services to help businesses, allowing them to build AI applications with a high level of accuracy. Future AGI helps decision-making by offering insights into a variety of models and configurations, enabling developers to concentrate on the development of effective solutions.

FAQs

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

What is the role of the data ingestion & preprocessing layer?

How are text embeddings generated and stored?

What does orchestration and prompt management entail?

How do you deploy and scale LLM applications effectively?

Table of Contents

Table of Contents

Table of Contents

Rishav Hada is an Applied Scientist at Future AGI, specializing in AI evaluation and observability. Previously at Microsoft Research, he built frameworks for generative AI evaluation and multilingual language technologies. His research, funded by Twitter and Meta, has been published in top AI conferences and earned the Best Paper Award at FAccT’24.

Rishav Hada is an Applied Scientist at Future AGI, specializing in AI evaluation and observability. Previously at Microsoft Research, he built frameworks for generative AI evaluation and multilingual language technologies. His research, funded by Twitter and Meta, has been published in top AI conferences and earned the Best Paper Award at FAccT’24.

Rishav Hada is an Applied Scientist at Future AGI, specializing in AI evaluation and observability. Previously at Microsoft Research, he built frameworks for generative AI evaluation and multilingual language technologies. His research, funded by Twitter and Meta, has been published in top AI conferences and earned the Best Paper Award at FAccT’24.

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