Best of Backend Development — January 2026

  1. 1
    Article
    Avatar of devjourneyDeveloper's Journey·15w

    It Worked in Dev. It Worked in QA. Then Production Happened.

    A backend engineer shares a production incident where an appointment-fetching endpoint worked fine in dev and QA but caused 4-second response times in production. The issue was an N+1 query problem: the code made 6,000+ individual database calls to fetch patient details. The solution involved batching patient data retrieval into a single query using in-memory maps and adding proper projections, reducing latency to 500-600ms. The incident highlights the importance of testing with realistic data volumes, thorough code reviews, and anticipating edge cases during development.

  2. 2
    Article
    Avatar of devtoDEV·15w

    Microservices Are Killing Your Performance (And Here's the Math)

    Microservices introduce significant performance overhead compared to monolithic architectures. Network calls add 1,000-5,000x latency versus in-process function calls, resulting in 50-150% higher latency, 300% more resource usage, and 2-3x infrastructure costs. Benchmarks show microservices suffer from cascading failures (5x more downtime), database connection exhaustion, and serialization overhead. The article argues microservices solve organizational problems (team autonomy, independent deployment) rather than technical ones, and recommends modular monoliths for most applications. Microservices only make sense for organizations with 50+ engineers, independent scaling requirements, technology diversity needs, or compliance isolation.

  3. 3
    Article
    Avatar of devjourneyDeveloper's Journey·16w

    Why I Started Documenting My Dev Process Instead of Rushing Projects

    A developer shares their shift toward documenting their development process and decisions rather than rushing through projects. They emphasize the value of sharing real work-in-progress, including uncertainties and learning moments, over polished highlights. The post announces a Patreon for dev logs, breakdowns, and honest project updates.

  4. 4
    Article
    Avatar of devclassDEVCLASS·15w

    Open source MySQL repository has no commits in more than three months • DEVCLASS

    MySQL's GitHub repository has seen no commits since September 2025, coinciding with reported Oracle layoffs in the MySQL team. Commit activity has declined yearly since 2019, reaching its lowest point in 2025 since the project began. Industry experts suggest Oracle is focusing on proprietary MySQL versions (Enterprise, Cluster, Heatwave) while neglecting the open source community edition. Despite concerns, MySQL remains the second most popular database among professional developers according to Stack Overflow surveys, though PostgreSQL now leads. Experts recommend migrating to alternatives like MariaDB or PostgreSQL, though migration can be challenging due to SQL dialect differences.

  5. 5
    Article
    Avatar of hnHacker News·14w

    Replacing Protobuf with Rust to go 5 times faster

    PgDog replaced Protobuf serialization with direct C-to-Rust bindings in their PostgreSQL proxy, achieving 5x faster query parsing and 10x faster deparsing. The team forked pg_query.rs and used bindgen with AI-assisted code generation to create 6,000 lines of recursive conversion code that maps C structs directly to Rust. Profiling revealed Protobuf deserialization as the bottleneck, not the Postgres parser itself. The new implementation uses unsafe Rust with recursive algorithms for better CPU cache locality and zero additional memory allocation, resulting in 25% overall performance improvement in pgbench benchmarks.

  6. 6
    Article
    Avatar of stackovStack Overflow Blog·14w

    Don’t let your backend write checks your frontend can’t cache

    Frontend and backend architecture must work in harmony to deliver performant user experiences. As AI-generated interfaces and ephemeral UIs emerge, backend systems face new challenges around API orchestration, caching, and performance at scale. Frontend engineers need to understand backend constraints like processing load, API response times, and scalability to avoid creating interfaces that promise more than the backend can deliver. The shift toward component-based, modular interfaces requires spec-driven design and careful consideration of how APIs are structured and consumed. While AI can accelerate development, production-grade systems still require human understanding and ownership of both frontend and backend code.

  7. 7
    Article
    Avatar of ergq3auoeReinier·13w

    WebSockets Crash Course: Build a Real-Time Sports Engine (10ms Updates)

    A comprehensive WebSocket tutorial that teaches how to build a high-frequency broadcast engine capable of delivering real-time sports updates to over 100,000 concurrent users with sub-second latency. The course covers WebSocket fundamentals, data ingestion from multiple sources, architecture for handling massive concurrent connections, and deployment strategies for production-scale real-time systems.

  8. 8
    Article
    Avatar of supabaseSupabase·16w

    Introducing TRAE SOLO integration with Supabase

    TRAE IDE, an AI-powered development environment from ByteDance, now integrates with Supabase to enable backend management directly within the IDE. Developers can browse databases, query tables, manage storage buckets, configure authentication, view logs, and handle secrets without switching contexts. The integration uses Supabase's Management API and MCP Server, allowing TRAE SOLO's AI agent to understand project structure and provide contextual assistance throughout the development lifecycle from requirements to deployment.

  9. 9
    Video
    Avatar of tsoding_dailyTsoding Daily·15w

    This is Better Than Protobuf

    ASN.1 is a data serialization standard from 1984 that predates Protocol Buffers and solves similar problems. The libtasn1 library allows parsing ASN.1 schema definitions at runtime to create serializers/deserializers without code generation. The API lets you define data structures in .asn files, parse them into an internal tree representation, create elements, set values, and encode/decode binary data. While the core concept is elegant—runtime schema parsing with dynamic introspection—the implementation has quirks like inconsistent naming conventions, poorly documented APIs, buffer overflow risks, and unusual type handling (booleans as null-terminated strings). Despite rough edges typical of legacy GNU projects, the approach offers more flexibility than Protobuf's code generation model.

  10. 10
    Video
    Avatar of TechWithTimTech With Tim·16w

    I Asked an Uber Tech recruiter if CS Grads are Cooked...

    An ex-Uber senior technical recruiter with 10 years of experience discusses the 2025 tech job market. The market has fewer roles with higher quality bars, though entry-level positions still exist at companies like Meta. AI is reducing some engineering roles, particularly affecting developer velocity teams, but humans are still needed for project leadership. Security and infrastructure engineering are exploding niches with 4x more backend roles than frontend at major companies. The bar has risen significantly—companies now scrutinize school pedigree, project impact articulation, and specialized skills beyond common JavaScript/React stacks. The market follows economic cycles and may improve but likely won't return to 2020-era compensation levels.

  11. 11
    Article
    Avatar of notedNoted·15w

    ConvertX: A Self-Hosted File Converter for Nearly Any Format

    ConvertX is a self-hosted file converter that supports over a thousand formats through a web interface. Built with TypeScript, Bun, and Elysia, it wraps familiar conversion tools like FFmpeg, ImageMagick, LibreOffice, and Pandoc into a single service. It supports batch processing, multiple user accounts, and password protection, making it suitable for homelabs, small teams, or anyone wanting to avoid third-party conversion services. Deployment is straightforward via Docker Compose, giving users full control over their files and conversion workflows.

  12. 12
    Article
    Avatar of hackadayHackaday·16w

    GitHub Disables Rockchip’s Linux MPP Repository After DMCA Request

    GitHub disabled Rockchip's Linux MPP repository following a DMCA takedown from the FFmpeg team. Rockchip allegedly copied FFmpeg code verbatim, removed copyright notices and authors, and relicensed it from LGPL 2.1 to Apache. FFmpeg privately contacted Rockchip about the violation nearly two years ago with no response. FFmpeg now demands Rockchip either comply with LGPL terms or remove all infringing files. Despite being aware of the license issue in public communications, Rockchip has deferred addressing it indefinitely.

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