Nick Alvarez - Software Engineer Portfolio

Back-of-the-Envelope Calculations

Master the art of quick, accurate estimations that every staff+ engineer uses in system design interviews and real-world architecture discussions.

Rate Limiter

Deep dive into rate limiting algorithms (Token Bucket, Leaky Bucket, Sliding Window) with distributed system implementations and real-world pitfalls.

Consistent Hashing

How consistent hashing powers distributed caches like Redis Cluster and DynamoDB — complete with visualizations, replication strategies, and virtual nodes explained.

Key-Value Store

From in-memory hash maps to distributed giants like etcd and DynamoDB: design trade-offs, CAP theorem implications, and LSM vs B-Tree storage engines.

System Design

Systems design | MIT News

The MIT spinout Silverthread helps companies transform complex codebases into modular systems that can be changed or updated without headaches.

System Design PDFs (2024 Edition - Latest)

High Resolution PDFs/Images Big Archive: System Design Blueprint: Kubernetes tools ecosystem.

System Design is More Important Than You Think

This was one of the finest articles about the system design and its industry impact in this new era of Leetcoders.

System Design was HARD until I Learned these 30 Concepts

In this article, I'll walk you through the 30 most important System Design concepts every developer should know.

Backend Development

Backend Development Trends in 2026: What You Should Learn

Backend development has evolved dramatically. As we step into 2026, the landscape is shifting faster than ever, driven by the demand for scalable, efficient, and highly maintainable systems.

Java & Spring Boot in 2026: The 7 Trends That Will Quietly Redefine Backend Development

Java and Spring Boot are quietly dominating again in 2026 with mature integrations, simplicity, and performance. Key shifts include virtual threads as default and production-ready AOT.

Backend Development in 2026: Engineering for Scale, Performance, and Reliability

In 2026, backend development focuses on higher concurrency, API-first architectures, async execution, intelligent caching, and frameworks chosen for throughput and AI readiness.

The 3 Biggest Trends in Backend Development (2024-2026)

From AI and Machine Learning deeply embedded in backend workflows to the resurgence of serverless as a cornerstone strategy and microservices with advanced containerization.

Frontend Development

The state of frontend development in 2026: what data and developers reveal

Discover the top frontend trends for 2026: meta-frameworks, hybrid rendering, AI-driven workflows, and what developers expect from React, Next.js, Svelte, and Astro. React and Next.js still dominate, but faster, lighter alternatives are rising. Here’s what the data and developers say about the year ahead.

How AI Is Reshaping Web Development in 2026: JavaScript, Frameworks, Open Source, and PM Tools

In this blog post, we'll consider how AI-first tools continue to reshape long-established development cycles and become common helpers of developers. Then, you’ll learn if traditional frontend technologies stay relevant in this new landscape. Additionally, we’ll highlight the impact of AI on open source and the project management industry.

Frontend Developer 2026: Skills AI (and Low-Code) Can't Replace

Discover the essential frontend developer skills for 2026. This article dives into the key competencies every frontend developer and team lead should master by 2026. We'll look at the intersection of AI, low-code platforms, and enduring human skills in the evolving landscape of web development.

The 8 trends that will define web development in 2026

What trends will define web development in 2026? Check out the eight most important trends of the year, from AI-first development to meta-frameworks, TypeScript standardization, edge computing, and more. As we look toward 2026, we’ll explore the trends set to define web development – not as distant predictions, but as near-term outcomes of where the ecosystem is already headed.

Data Structures and Algorithms

The DSA Roadmap for 2026: What to Learn, What to Skip, and Why It Still Matters

A practical 2026 DSA guide emphasizing foundations for problem breakdown and optimal choices. Focus on essentials (binary search, two pointers, sliding window, recursion, patterns) while skipping inefficient grinding. AI generates code, but DSA mastery delivers irreplaceable understanding of performance and scalability.

Data Structures and Algorithms in 2026: What Backend Developers Actually Need to Know (and What AI Can't Replace)

Essential 2026 backend DSA toolkit: arrays/strings patterns (two-pointers/sliding windows), hash tables, trees/graphs (BFS/DFS), heaps/tries, binary search, Big O, plus caching/indexing/vector store instincts. AI accelerates generation but can't replace human judgment on trade-offs, latency, and production realities.

DSA Roadmap 2026: From Basics to FAANG for College Students

Phased 6-month 2026 roadmap for students targeting FAANG: Month 1 foundations (language, complexity, recursion); Months 2-3 core linear structures/searching; Months 4-5 trees/graphs/heaps/DP; Month 6+ top patterns, LeetCode, mocks, and projects. Stresses consistency and pattern recognition amid AI advancements.

DSA is Dead! Long Live DSA! (Why You Still Need it in 2026)

Debunking the 2026 'DSA is dead' myth: AI handles implementations and boilerplate quickly, but algorithmic thinking evolves for real-world optimization, trade-offs, high-dimensional data, and scalable systems. Don't abandon DSA—it's more relevant than ever for strong engineering careers.

Git Tips

What Is Git | Git Fundamentals - AlgoMaster.io

An essential introduction to Git as a distributed version control system: learn its core features (branching, staging, speed), object model (blobs, trees, commits), basic terminology, and key commands like init, add, commit, branch—perfect starting point for mastering version control.

Git Best Practices - W3Schools (Updated 2025)

Core recommendations including commit often, clear messages, branching strategies, pull before push, using .gitignore, and keeping repositories lean for reliable version control.

10 Git Tricks That Will Make You a More Efficient Developer in 2025

Practical, real-world Git commands and techniques including undoing commits safely, blame mastery, stashing workflows, and more to boost daily productivity and avoid common pitfalls.

What are Git version control best practices? - GitLab

Explore atomic commits, branching strategies (GitFlow, feature branching), effective commit messages, and ways to reduce conflicts while improving team coordination and code quality.

Nicholas Alvarez

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Caching in JavaScript Made Easy

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