https://coderboi.com/ Recent content on CoderBoi Hugo -- 0.155.3 en-us Sun, 15 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/spring-ai-rag-pipeline/ Sun, 15 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/spring-ai-rag-pipeline/ Build a Spring AI RAG pipeline: embed your documents, retrieve the relevant chunks, and feed them into a ChatClient prompt so the LLM answers from your own data. https://coderboi.com/posts/spring-ai-embeddings-vector-stores/ Tue, 10 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/spring-ai-embeddings-vector-stores/ Generate embeddings and store them in a vector store with Spring AI: the EmbeddingModel, vector store options (Pgvector, Redis, in-memory), and similarity search. https://coderboi.com/posts/rag-vs-finetuning/ Tue, 10 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/rag-vs-finetuning/ RAG vs fine-tuning: how each works, their cost and maintenance trade-offs, when to choose which, and why most apps start with retrieval-augmented generation. https://coderboi.com/posts/spring-ai-chat-completions/ Thu, 05 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/spring-ai-chat-completions/ Call OpenAI or Ollama from Spring Boot with the Spring AI ChatClient: dependencies, application.yml config, sending prompts, and streaming responses. https://coderboi.com/posts/spring-ai-intro/ Sun, 01 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/spring-ai-intro/ What Spring AI is, why use it over raw HTTP clients, and how it fits your Spring Boot stack for chat, embeddings, and RAG. Part 1 of the Spring AI series. https://coderboi.com/posts/running-llms-locally-ollama/ Sun, 01 Feb 2026 10:00:00 +0000 https://coderboi.com/posts/running-llms-locally-ollama/ How to run LLMs locally with Ollama: install, pull and run a model, use the OpenAI-compatible API, hardware needs, and when local beats the cloud. https://coderboi.com/posts/prompt-engineering-tips/ Thu, 15 Jan 2026 10:00:00 +0000 https://coderboi.com/posts/prompt-engineering-tips/ Practical prompt engineering tips: be explicit about task and format, use few-shot examples, ask for step-by-step reasoning, and iterate for consistent LLM output. https://coderboi.com/posts/intro-large-language-models/ Thu, 01 Jan 2026 10:00:00 +0000 https://coderboi.com/posts/intro-large-language-models/ What is a large language model (LLM)? A plain-English guide to how LLMs work, what they are good and bad at, and why they changed how we build software. https://coderboi.com/posts/spring-boot-docker/ Mon, 15 Dec 2025 10:00:00 +0000 https://coderboi.com/posts/spring-boot-docker/ Dockerize a Spring Boot app the right way: a multi-stage Dockerfile with layered JARs, Buildpacks as a no-Dockerfile option, and config for containers. https://coderboi.com/posts/spring-boot-jwt-security/ Mon, 01 Dec 2025 10:00:00 +0000 https://coderboi.com/posts/spring-boot-jwt-security/ A practical guide to Spring Boot JWT authentication: the login flow, a validation filter, Spring Security config, and the pitfalls that bite in production. https://coderboi.com/posts/spring-webflux-rest-apis/ Sat, 15 Nov 2025 10:00:00 +0000 https://coderboi.com/posts/spring-webflux-rest-apis/ Build reactive REST APIs with Spring WebFlux and Project Reactor: Mono and Flux, annotated vs functional routing, and when reactive is actually worth it. https://coderboi.com/posts/spring-boot-3-getting-started/ Sat, 01 Nov 2025 10:00:00 +0000 https://coderboi.com/posts/spring-boot-3-getting-started/ Getting started with Spring Boot 3: Java 17, the Jakarta EE namespace change, generating a project, running it, and what actually changed from Boot 2. https://coderboi.com/posts/spring-boot-global-exception-handling/ Sat, 25 Oct 2025 10:00:00 +0000 https://coderboi.com/posts/spring-boot-global-exception-handling/ Spring Boot exception handling done right: one @RestControllerAdvice, a consistent error DTO, validation handling, and ProblemDetail — no leaked stack traces. https://coderboi.com/posts/spring-boot-rest-controller-5-min/ Mon, 20 Oct 2025 10:00:00 +0000 https://coderboi.com/posts/spring-boot-rest-controller-5-min/ Build your first Spring Boot REST controller in 5 minutes: a minimal @RestController, request params, JSON responses, and the annotations that matter. https://coderboi.com/about/ Mon, 01 Jan 0001 00:00:00 +0000 https://coderboi.com/about/ About Touheed Khan, Staff Engineer, Java, Spring Boot, AI, Microservices. Tech Lead at Nagarro.