Backend & APIs

HTTP services, microservices, RPC, auth, caching, and resilient API design.

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Inside Backend & APIs

Node, Deno & Bun JS runtimes, frameworks, and edge/serverless adapters. Python Web Django, Flask, FastAPI, async servers, and ORMs for Python backends. JVM Backends Spring Boot, Quarkus, Micronaut, and reactive stacks on the JVM. .NET & C# ASP.NET Core, Minimal APIs, gRPC, and cloud-ready patterns. PHP & Laravel/Symfony Frameworks, queues, and performance patterns for PHP 8+. Go & Rust Services Compiled backends for scale, observability, and efficiency. GraphQL & RPC Schemas, federation, protobuf, and contract-first service stacks. Auth, Identity & Sessions OAuth/OIDC, sessions, JWTs, SSO patterns, and security considerations. Caching, Queues & Background Jobs Caching strategies, job queues, retries, and background processing patterns.

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Latest in Backend & APIs


dev.to > angojay > building-a-url-shortener-my-first-real-dive-into-backend-fundamentals-26bo

Building a URL Shortener: My First Real Dive into Backend Fundamentals

22+ min ago   (749+ words) Here's a walkthrough of what I built and what it taught me. You can find the full source code here: github.com/Ango-Jay/url-shortener. A good real-world example is LinkedIn's custom URLs, which are really just a human-friendly alias sitting…...


dev.to > shubhradev > i-throttled-my-app-to-slow-3g-heres-what-my-tests-never-caught-h7m

I Throttled My App to Slow 3G. Here's What My Tests Never Caught

30+ min ago   (67+ words) I wasn't looking for a performance problem. I wanted to see what happened when the network got slow... Tagged with javascript, webdev, debugging, testing....


dev.to > hoangson > we-planted-180-bugs-in-copies-of-real-open-source-backends-fix-your-first-one-in-about-20-minutes-59aj

We Planted 180 Bugs in Copies of Real Open-Source Backends. Fix Your First One in About 20 Minutes

30+ min ago   (1063+ words) PushForces is a practice site where you fix bugs we planted on purpose in copies of real open-source... Tagged with showdev, career, backend, programming....


dev.to > alginte > monitoring-kafka-streams-applications-the-state-a-cluster-view-cannot-show-1cde

Monitoring Kafka Streams applications: the state a cluster view cannot show

33+ min ago   (268+ words) A typical Kafka console reads the cluster: topics, partitions, consumer groups, committed offsets,... Tagged with kafka, kafkastreams, java....


dev.to > payout_rail > ach-return-codes-explained-r01-r85-and-how-to-handle-them-in-production-38pp

ACH Return Codes Explained: R01–R85 and How to Handle Them in Production

32+ min ago   (242+ words) When an ACH transaction fails, your payout system receives a return code—a three-character alphanumeric identifier that tells you exactly why the transfer didn't complete. Unlike generic "payment failed" messages, ACH return codes are standardized by Nacha (the National Automated…...


dev.to > datacpp_8185 > invalid-input-must-still-fail-a-must-reject-corpus-for-agent-patches-2oj7

Invalid Input Must Still Fail: A Must-Reject Corpus for Agent Patches

30+ min ago   (1144+ words) Agent patches often go green by making invalid input succeed. That is not a fix. It is a silent spec change. A must-reject corpus records the cases that must keep failing, hashes the fixtures, and blocks merge when a forbidden…...


dev.to > stevenkamwaza > twinify-110-map-without-profiles-hide-secrets-with-attributes-and-ship-native-aot-57c5

Twinify 1.1.0: Map Without Profiles, Hide Secrets With Attributes, and Ship Native AOT

50+ min ago   (293+ words) If you missed the earlier posts on Twinify: Twinify is a MIT-licensed object mapper for.NET 8, 9, and 10. You call mapper.Map(user) and it copies matching members. Profiles still exist when names are not enough. 1.0.2 was about speed. 1.1.0 is about…...


dev.to > linusholm3764 > patient-portal-oauth-login-explicit-consent-and-refresh-token-rotation-in-nodejs-3kp0

Patient Portal OAuth Login: Explicit Consent and Refresh Token Rotation in Node.js

1+ hour, 14+ min ago   (360+ words) For a migration off a managed provider, I would first model the boundary, then run one narrow flow in parallel. Do not move every callback and database record in one release. Account continuity matters more than shaving a day from…...


dev.to > alex_murithi > sql-joins-made-simple-1k6b

SQL Joins Made Simple

1+ hour, 26+ min ago   (309+ words) Relational databases often store related information across multiple tables. To answer real-world questions, we need to connect these tables using SQL JOINs. The main types of joins - INNER, LEFT, RIGHT, and SELF JOIN A JOIN allows us to combine rows…...


dev.to > kyungmin_lee_85c597046ee0 > pytrends-is-dead-here-is-how-google-trends-actually-loads-data-in-2026-including-trending-now-3bn

pytrends is dead. Here is how Google Trends actually loads data in 2026 (including Trending Now)

1+ hour, 29+ min ago   (226+ words) If you have tried pytrends recently you know the story: TooManyRequestsError on the first call, dailytrends returning 404, and an unmaintained repo. Google redesigned Trends in 2024, moved the "Trending Now" feed to a different backend, and started returning 429 to anything that…...