--- title: "Pacifique Linjanja (@paclinjanja) | Hashnode" description: "Software Fullstack Engineer | ReactJs | NextJs | NestJs | VueJs | NodeJs | Ruby | Ruby on Rails | ExpressJs | web3 | solidity | smart contra" url: "https://hashnode.com/@paclinjanja" --- @paclinjanja # Pacifique Linjanja @paclinjanja · Nairobi · Joined February 2023 Software Fullstack Engineer | ReactJs | NextJs | NestJs | VueJs | NodeJs | Ruby | Ruby on Rails | ExpressJs | web3 | solidity | smart contra [Website](https://www.paclinjanja.com/) ### [How to Use NestJS Observe: An Observability Handbook for Devs](https://freecodecamp.org/news/how-to-use-nestjs-observe-an-observability-handbook-for-devs?utm_source=hashnode&utm_medium=feed) Observability isn't a new problem, and NestJS is certainly not the first ecosystem to tackle it. But NestJS Observe is interesting because it asks a more specific question: what happens when observabi 32 min read · [freecodecamp.org](https://freecodecamp.org/news/how-to-use-nestjs-observe-an-observability-handbook-for-devs?utm_source=hashnode&utm_medium=feed) [Oct 5](https://hashnode.com/posts/how-to-use-nestjs-observe-an-observability-handbook-for-devs/6ac38fe863ed4fe7c5562283) ### [What is Reactive Programming? Beginner's Guide to Writing Reactive Code](https://freecodecamp.org/news/reactive-programming-beginner-guide?utm_source=hashnode&utm_medium=feed) Welcome to your journey through the dynamic world of reactive programming! This fascinating paradigm is all about building responsive, resilient, and adaptable applications that effortlessly manage vast amounts of data almost instantly. Imagine writi... 19 min read · [freecodecamp.org](https://freecodecamp.org/news/reactive-programming-beginner-guide?utm_source=hashnode&utm_medium=feed) [Mar 18, 2024](https://hashnode.com/posts/reactive-programming-beginner-guide/66ba57fdbca875d7790d6a89) ### [Design Patterns for Modern Backend Development – with Example Use Cases](https://freecodecamp.org/news/design-pattern-for-modern-backend-development-and-use-cases?utm_source=hashnode&utm_medium=feed) In software development, design patterns are reusable solutions to common problems that developers encounter. These patterns provide a structure for organizing code that makes it more maintainable, modular, and scalable. In modern backend developmen... 22 min read · [freecodecamp.org](https://freecodecamp.org/news/design-pattern-for-modern-backend-development-and-use-cases?utm_source=hashnode&utm_medium=feed) [May 8, 2023](https://hashnode.com/posts/design-pattern-for-modern-backend-development-and-use-cases/66ba57fabab56b945824001f) ### [Build a GraphQL API with NestJs and MongoDB, in a modern way - Part 3.](https://paclinjanja.hashnode.dev/build-a-graphql-api-with-nestjs-and-mongodb-in-a-modern-way-part-3?utm_source=hashnode&utm_medium=feed) Are you ready to take your GraphQL development skills to the next level? In this part, I am talking about ci/cd actions applied to a nest.js project. 9 min read · [paclinjanja.hashnode.dev](https://paclinjanja.hashnode.dev/build-a-graphql-api-with-nestjs-and-mongodb-in-a-modern-way-part-3?utm_source=hashnode&utm_medium=feed) [3](https://hashnode.com/posts/build-a-graphql-api-with-nestjs-and-mongodb-in-a-modern-way-part-3/641ee7835f50e6f739bdff65) [Mar 25, 2023](https://hashnode.com/posts/build-a-graphql-api-with-nestjs-and-mongodb-in-a-modern-way-part-3/641ee7835f50e6f739bdff65) ### [Build a GraphQL API with NestJs and MongoDB, in a modern way - Part 2.](https://paclinjanja.hashnode.dev/build-graphql-api-nestjs-mongodb-a-modern-way-part-2-tdd?utm_source=hashnode&utm_medium=feed) In this article, I'll be discussing testing in general and taking a deep dive into the TDD workflow, applied to a Graphql API using nest.js and jest 22 min read · [paclinjanja.hashnode.dev](https://paclinjanja.hashnode.dev/build-graphql-api-nestjs-mongodb-a-modern-way-part-2-tdd?utm_source=hashnode&utm_medium=feed) [Mar 11, 2023](https://hashnode.com/posts/build-graphql-api-nestjs-mongodb-a-modern-way-part-2-tdd/640c6df6f288bc4eec98360b)