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Level Up Coding

@LevelUpCoding_

Level up your engineering & system design skills. Complex topics simplified. Thank you to our partner @getpostman who keep our content free to the community

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Database Indexing Explained Most databases require some form of indexing to keep up with performance benchmarks. Searching through a database is much simpler when the data is correctly indexed, which improves the system's overall performance. A database index is a lot like…

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The first Autonomous Machine Learning Engineer is here. NEO is a multi-agent system that automates the entire ML workflow, saving engineers thousands of hours of grunt work. Here’s why NEO will change how AI/ML teams tackle everyday problems: 1) Multi-agent system Its agents…


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Cookies vs sessions — What’s the difference? A solid understanding of HTTP’s intrinsic statelessness, along with proficient use of sessions and cookies, is important for web development. Strengthening security and maximizing user experience requires these mechanisms. Let’s…


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The 2024 State of The API Report is out. It's the most comprehensive report/survey on APIs. It's 25 pages. Here are the key insights: 🧵

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URL vs URI vs URN — Do you know the differences? 🔹 URI (Uniform Resource Identifier) A URI is a string of characters that identifies a resource, either by location, name, or both. It’s the most general identifier. URL and URN are subtypes of URI. 🔹 URL (Uniform Resource…

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What does an API gateway do? An API gateway acts as a single entry point for clients, handling request routing, response composition, and protocol translation. It simplifies client interactions with microservices and offers additional features like rate limiting, authentication,…


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How to build a winning resume (without spending all day). Pick a template used by people hired at Google, Microsoft, Amazon, and more (industry-specific, and ATS-friendly). Then simply upload your old resume and watch it update. Or you can provide key information like your job…


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Tokenization explained. Tokenization is a security technique that replaces sensitive information with unique placeholder values called tokens. By tokenizing your sensitive data, you can protect them from unauthorized access and lessen the impact of data breaches. Tokenization…


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How to improve API performance? API inefficiencies not only degrade the user experience but also increase operational costs through increased resource consumption and downtime. Let’s look at five of the most popular techniques to improve API performance: It’s worth…


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Sever-sent events explained. Real-time data dissemination to users is a frequent requirement in web development. With the help of the server-sent events (SSE), servers can update web pages via a single HTTP/HTTPS connection. It streamlines creating real-time notifications,…


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6 API Architecture Styles You Should Know. API architectural styles determine how applications communicate. The choice of an API architecture can have significant implications on the efficiency, flexibility, and robustness of an application. So it is very important to choose…


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Elasticsearch explained. Elasticsearch stands out as a key tool in search and analytics, valued for its real-time data processing. This open-source engine is part of the ELK stack (elastic stack). It integrates seamlessly with data visualization tools and log processors which…


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How can you unblock team members waiting for an API? Mock servers. Postman allows you to create mock servers to help with API development and testing. A mock server simulates the behavior of a real API server by accepting requests and returning responses. It allows you to…

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Object-oriented programming explained in under 3 minutes: Object-oriented programming (OOP) is a programming paradigm in which programs are designed using classes and objects. This design allows related functions and data to be grouped together in self-contained and reusable…

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How to create a resume that’ll get you interviews (without getting lucky):

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What is Kafka, and how does it work? Apache Kafka is an open source distributed streaming platform designed for building real-time data pipelines and streaming applications. Kafka operates as a distributed pub-sub messaging system. Allowing applications to publish and subscribe…


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API Gateway vs Load Balancer — What's the Difference? An API Gateway acts as a single entry point for clients, handling request routing, composition, and protocol translation. It simplifies client interactions with microservices and offers features like rate limiting,…


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Roadmap for learning Python. Python is one of the most versatile programming languages today. From web development and automation to data science and machine learning, it almost feels like Python is everywhere. Whether you're automating repetitive tasks, building apps or ML…


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How do we design secure and safe APIs? The rise in API-related security breaches highlights the necessity for robust API security. Let's look at 12 essential tips for improving API security: 🔹 HTTPS Enforcing HTTPS for all API connections is a critical step in securing…


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Connection pooling explained. Handling API requests often requires querying the database. Creating a new connection for each API call introduces unnecessary overhead. Connection pooling mitigates this by reusing existing connections. This reduces the overhead associated with…


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What are modular monoliths, and how do they work? Modular monoliths are gaining popularity. But what makes them stand out? They balance the simplicity of traditional monoliths with the scalability and flexibility of microservices. While they are deployed as a single…


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