https://brilianfirdaus.com/blog/Recent content in Blog on Brilian FirdausHugoen-USTue, 29 Jul 2025 00:17:00 +0000https://brilianfirdaus.com/blog/building-your-first-llm-career-assistant-a-beginners-guide/Tue, 29 Jul 2025 00:17:00 +0000https://brilianfirdaus.com/blog/building-your-first-llm-career-assistant-a-beginners-guide/Build a resume-based chatbot with Python, FastAPI, and the OpenAI API, including PDF parsing, conversation memory, token limits, and rate limiting.https://brilianfirdaus.com/blog/how-ai-change-the-way-i-work-as-a-software-engineer/Tue, 29 Apr 2025 07:00:01 +0000https://brilianfirdaus.com/blog/how-ai-change-the-way-i-work-as-a-software-engineer/How I use AI tools for prototyping and research, and my observations on code generation, technical learning, and the role of software engineers.https://brilianfirdaus.com/blog/mastering-race-conditions-strategies-for-reliable-software-systems/Tue, 22 Apr 2025 06:00:19 +0000https://brilianfirdaus.com/blog/mastering-race-conditions-strategies-for-reliable-software-systems/Understand race conditions in multithreaded and distributed systems, with locking strategies, detection methods, and a banking transaction example.https://brilianfirdaus.com/blog/a-developers-guide-to-circuit-breakers-protect-your-service-from-failure/Tue, 08 Apr 2025 06:00:06 +0000https://brilianfirdaus.com/blog/a-developers-guide-to-circuit-breakers-protect-your-service-from-failure/How circuit breakers isolate downstream failures, with state transitions, configuration, monitoring, and a Go example using Hystrix.https://brilianfirdaus.com/blog/what-is-api-versioning/Tue, 25 Jun 2024 06:00:23 +0000https://brilianfirdaus.com/blog/what-is-api-versioning/Compare API versioning through URL paths, query parameters, request headers, and media types, and plan how to communicate breaking changes to consumers.https://brilianfirdaus.com/blog/understanding-database-locks-managing-concurrency-in-databases/Tue, 11 Jun 2024 15:00:12 +0000https://brilianfirdaus.com/blog/understanding-database-locks-managing-concurrency-in-databases/Database concurrency explained through shared and exclusive locks, isolation levels, pessimistic and optimistic locking, MVCC, and a seat-booking example.https://brilianfirdaus.com/blog/understanding-how-java-garbage-collector-works/Tue, 28 May 2024 03:00:40 +0000https://brilianfirdaus.com/blog/understanding-how-java-garbage-collector-works/How Java manages memory and reclaims objects, with an overview of Serial, Parallel, G1, and ZGC collectors and their performance tradeoffs.https://brilianfirdaus.com/blog/how-a-database-index-works-and-how-to-use-it-effectively/Tue, 14 May 2024 11:08:59 +0000https://brilianfirdaus.com/blog/how-a-database-index-works-and-how-to-use-it-effectively/How database indexes speed up queries, their storage and write costs, and when to use single-column, compound, unique, and partial indexes.https://brilianfirdaus.com/blog/why-you-should-use-caching/Thu, 02 May 2024 16:16:50 +0000https://brilianfirdaus.com/blog/why-you-should-use-caching/Backend object caching explained: write patterns, cache misses, invalidation, replacement policies, performance tradeoffs, and when caching is unsuitable.https://brilianfirdaus.com/blog/the-essential-skills-of-a-software-engineer/Thu, 11 Apr 2024 06:08:54 +0000https://brilianfirdaus.com/blog/the-essential-skills-of-a-software-engineer/My view of the skills software engineers need: technical fundamentals, clear communication, ownership, and understanding the people using the product.https://brilianfirdaus.com/blog/incident-management-platform-in-blibli-com/Tue, 18 Jul 2023 05:08:00 +0000https://brilianfirdaus.com/blog/incident-management-platform-in-blibli-com/How we built an incident management platform at Blibli, from the earlier response process to requirements, implementation, incident flow, and results.https://brilianfirdaus.com/blog/designing-a-retry-mechanism-for-reliable-systems/Tue, 03 Jan 2023 02:00:10 +0000https://brilianfirdaus.com/blog/designing-a-retry-mechanism-for-reliable-systems/Design retries for transient failures: choose retryable requests, set backoff periods, manage retry state, and account for timeouts and idempotency.https://brilianfirdaus.com/blog/how-to-better-store-password-in-database/Tue, 02 Aug 2022 13:00:43 +0000https://brilianfirdaus.com/blog/how-to-better-store-password-in-database/Why plain-text passwords and fast hashes are unsafe for database storage, how salts work, and how bcrypt balances hashing cost with login latency.https://brilianfirdaus.com/blog/how-to-implement-json-web-token-jwt-in-java-spring-boot/Sun, 12 Jun 2022 10:58:28 +0000https://brilianfirdaus.com/blog/how-to-implement-json-web-token-jwt-in-java-spring-boot/Implement signed and encrypted JSON Web Tokens in Java Spring Boot with jose4j, covering JWS creation and validation, JWE, and key handling.https://brilianfirdaus.com/blog/introduction-to-jwt-jws-jwe-jwa-jwk/Mon, 02 May 2022 06:02:02 +0000https://brilianfirdaus.com/blog/introduction-to-jwt-jws-jwe-jwa-jwk/An introduction to JWT and related JOSE standards: token structure, signatures, encryption, algorithms, keys, and the differences between JWS and JWE.https://brilianfirdaus.com/blog/get-started-with-docker/Mon, 29 Mar 2021 03:00:00 +0000https://brilianfirdaus.com/blog/get-started-with-docker/A practical introduction to Docker containers, images, commands, volumes, networking, Dockerfiles, and running multiple services with Docker Compose.https://brilianfirdaus.com/blog/updating-code-curated-to-ghost-v4/Wed, 17 Mar 2021 14:10:59 +0000https://brilianfirdaus.com/blog/updating-code-curated-to-ghost-v4/Notes from upgrading a self-hosted Ghost blog from version 3 to 4, covering theme checks, backups, the upgrade process, and performance comparisons.https://brilianfirdaus.com/blog/how-to-connect-java-with-elasticsearch/Fri, 18 Dec 2020 14:35:45 +0000https://brilianfirdaus.com/blog/how-to-connect-java-with-elasticsearch/Connect Spring Boot 2 to Elasticsearch using Spring Data repositories, ElasticsearchRestTemplate, and the REST high-level client, with CRUD examples.https://brilianfirdaus.com/blog/how-to-set-up-a-self-hosted-ghost-blogging-platform/Sat, 28 Nov 2020 12:57:20 +0000https://brilianfirdaus.com/blog/how-to-set-up-a-self-hosted-ghost-blogging-platform/A walkthrough of self-hosting Ghost on DigitalOcean, including domain setup, Cloudflare DNS and TLS, server configuration, and the Ghost admin account.https://brilianfirdaus.com/blog/using-xor-for-swapping-variable/Wed, 25 Nov 2020 14:42:01 +0000https://brilianfirdaus.com/blog/using-xor-for-swapping-variable/How exclusive OR works and why XOR can swap two variable values without a temporary variable, with binary examples and a Python implementation.https://brilianfirdaus.com/blog/reasons-i-changed-from-wordpress-to-ghost/Sat, 21 Nov 2020 07:57:00 +0000https://brilianfirdaus.com/blog/reasons-i-changed-from-wordpress-to-ghost/Why I moved my blog from WordPress to Ghost in 2020, including the Node.js stack, resource usage, plugin tradeoffs, and writing interface.https://brilianfirdaus.com/blog/how-to-handle-typos-in-elasticsearch-using-fuzzy-query/Sat, 21 Nov 2020 01:16:00 +0000https://brilianfirdaus.com/blog/how-to-handle-typos-in-elasticsearch-using-fuzzy-query/Handle typos in Elasticsearch with fuzzy and match queries, using edit distance, fuzziness, transpositions, prefix length, and query tuning examples.https://brilianfirdaus.com/blog/introduction-to-analyzer-in-elasticsearch/Sat, 21 Nov 2020 01:16:00 +0000https://brilianfirdaus.com/blog/introduction-to-analyzer-in-elasticsearch/How Elasticsearch analyzers turn text into searchable tokens, with examples of character filters, tokenizers, token filters, and custom analyzers.https://brilianfirdaus.com/blog/5-software-engineering-beginner-mistakes-i-did/Sat, 21 Nov 2020 01:00:00 +0000https://brilianfirdaus.com/blog/5-software-engineering-beginner-mistakes-i-did/Five mistakes from my early software engineering work: skipping tests and design, writing complex code, neglecting documentation, and missing soft skills.https://brilianfirdaus.com/blog/avoiding-the-null-pointer-exception-with-optional-in-java/Fri, 20 Nov 2020 04:33:00 +0000https://brilianfirdaus.com/blog/avoiding-the-null-pointer-exception-with-optional-in-java/How to use Java Optional to handle missing values, with examples of map, flatMap, filter, fallback methods, and common mistakes to avoid.https://brilianfirdaus.com/blog/create-a-simple-autocomplete-with-elasticsearch/Fri, 20 Nov 2020 01:00:00 +0000https://brilianfirdaus.com/blog/create-a-simple-autocomplete-with-elasticsearch/Build a simple Elasticsearch autocomplete using match_phrase_prefix, from index mappings and sample documents to query behavior and limitations.https://brilianfirdaus.com/blog/why-i-took-a-machine-learning-course-as-a-software-engineer/Thu, 19 Nov 2020 15:00:00 +0000https://brilianfirdaus.com/blog/why-i-took-a-machine-learning-course-as-a-software-engineer/Why I took a machine learning specialization as a software engineer, how I chose the course, and what I learned from completing it over five months.https://brilianfirdaus.com/blog/functional-programming-in-java-explained/Wed, 18 Nov 2020 16:49:35 +0000https://brilianfirdaus.com/blog/functional-programming-in-java-explained/Java functional programming with lambda expressions and functional interfaces, including built-in interfaces and a small custom Stream implementation.https://brilianfirdaus.com/blog/elasticsearch-text-vs-keyword/Wed, 18 Nov 2020 12:37:38 +0000https://brilianfirdaus.com/blog/elasticsearch-text-vs-keyword/Compare Elasticsearch text and keyword fields: how analysis changes indexing, how term and match queries behave, and when to use each field type.https://brilianfirdaus.com/blog/should-you-use-a-password-manager/Wed, 18 Nov 2020 12:30:45 +0000https://brilianfirdaus.com/blog/should-you-use-a-password-manager/An overview of password managers, password reuse risks, the benefits and risks of storing credentials, and ways to protect a password vault.https://brilianfirdaus.com/blog/basics-of-elasticsearch-for-developer/Wed, 18 Nov 2020 08:54:08 +0000https://brilianfirdaus.com/blog/basics-of-elasticsearch-for-developer/An introduction to Elasticsearch for developers, covering inverted indexes, field types, analyzers, document writes, queries, and aggregations.