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Dev.to·Thursday, December 25, 2025

Dev.to - Thursday, December 25, 2025

10 stories~15 min

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Hear all 10 stories summarized and read aloud.

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Stories Covered

01

Improving Developer Productivity Without Burning Out Your Team Practical engineering habits that actually scale

Developer productivity is often misunderstood. Many teams try to improve output by pushing harder — tighter deadlines, more meetings, more pressure. In reality, productivity increases when friction is reduced, not when effort is multiplied. This article explores practical ways engineering teams can work faster and more reliably without sacrificing code quality or developer well-being. Productivity problems are usually system problems When developers feel slow, the root cause is rarely a lack of

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02

How to Deploy a Voice AI Agent for HVAC Customer Inquiries: My Journey

How to Deploy a Voice AI Agent for HVAC Customer Inquiries: My Journey TL;DR Most HVAC dispatch systems fail when calls spike during emergencies—no human available, customers hang up, revenue lost. This guide builds a 24/7 voice AI agent using VAPI's conversational AI and Twilio's call routing to handle customer inquiries, schedule appointments, and qualify leads without human intervention. Stack: VAPI (agent logic) + Twilio (inbound/outbound calls) + your backend (CRM sync). Result

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03

word2vec Explained: deriving Mikolov et al.'s negative-sampling word-embeddingmethod

word2vec and negative sampling: how computers learn word meanings word2vec is a small program that turns words into numbers so computers can sense meaning. Mikolov and team, and changed how machines read text. negative sampling helps the model learn fast without slow math. word embeddings, simple maps where similar words sit near each other. Read article comprehensive review in Paperium.net: word2vec Explained: deriving Mikolov et al.'s negative-sampling word-embeddingmethod 🤖 This analysis

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04

Important Steps to Becoming a Successful Reseller on Creosca

The world of digital services is booming, from web hosting to VPNs, proxies, digital tickets, and AI tools, people and businesses need these services every single day. If you’ve ever wanted to start a business without technical knowledge, without hiring developers, and without investing heavily upfront, becoming a reseller on Creosca is your golden opportunity. Creosca allows you to sell digital services under your own brand while the platform takes care of the technical details, automation, bi

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05

🚀🔥 Train a 4B Model to Beat Claude Sonnet 4.5 🤖 and Gemini Pro 2.5 ✨ at Tool Calling 🛠️ - and for all Free! 💸🎉

How we used synthetic data to fine-tune Qwen3-4B into a specialist that outperforms frontier models — and how you can do it too (for free) There's a common assumption in the AI community that bigger is always better. That if you want state-of-the-art performance, you need to use the largest, most expensive models from frontier labs like Anthropic, OpenAI, or Google. We're here to challenge that assumption. Using DeepFabric, an open-source tool, we trained Qwen3-4B — a model with just 4 billion p

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06

🚀🔥 Train a 4B Model to Beat Claude Sonnet 4.5 🤖 and Gemini Pro 2.5 ✨ at Tool Calling 🛠️ - and for all Free! 💸🎉

How we used synthetic data to fine-tune Qwen3-4B into a specialist that outperforms frontier models — and how you can do it too (for free) There's a common assumption in the AI community that bigger is always better. That if you want state-of-the-art performance, you need to use the largest, most expensive models from frontier labs like Anthropic, OpenAI, or Google. We're here to challenge that assumption. Using DeepFabric, an open-source tool, we trained Qwen3-4B — a model with just 4 billion p

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07

CI/CD Pipeline for a Dockerized App on AWS (From zero to production).

At the end of the project, you should be able to confidently say to your potential employer: "I built a CI/CD pipeline using GitHub Actions to automatically test, build, and deploy a Dockerized application to AWS EC2, using Nginx and a blue/green strategy to achieve zero-downtime deployments." Step 0.1 — Create a new project folder cd ~/OneDrive/Desktop mkdir start-project1-cicd-from-scratch cd start-project1-cicd-from-scratch Initialize git: git init Step 0.2 — Create a NEW GitHub repository

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08

High-Throughput IoT Log Aggregator

Imagine an industrial monitoring system receiving telemetry packets from thousands of sensors every second. The system must: Ingest a batch of raw data packets. Filter inactive sensors. Aggregate temperature readings by Device ID. Generate a textual summary log for the dashboard. The Challenge: Since this runs continuously, any inefficiency (like unnecessary memory allocation) will cause "Garbage Collection" pauses, causing data loss. We must use memory-efficient patterns. We used Go language fo

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10

Building Scalable Software: Lessons from Real-World Development Projects

A practical guide for teams growing beyond MVP As software products evolve from MVPs into production systems, scalability becomes less of an abstract concept and more of a daily concern. Performance issues, deployment friction, and growing technical debt often surface exactly when a product starts gaining traction. This article shares practical insights into building scalable software systems based on real-world development experience. Scalability starts with architecture, not traffic Many teams

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