DField SolutionsMérnöki stúdió · Budapest
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Changelog

Changelog

What shipped and when · on the site and in the studio's practice. Every entry is dated and individually indexable.

entries27latest22 April 2026statusongoing
  1. 27 / release

    Custom software engineering service launched · embedded, IoT, integrations

    • New 'Custom software' service on the site · embedded firmware, IoT, desktop apps, ERP integrations, factory-line software.
    • Added /services/custom-software with full detail page + FAQ + tech stack.
    • Hungarian slug /szolgaltatasok/egyedi-fejlesztes wired with 308 redirect from the English slug on HU build.
    • New CustomEmbedded illustration · PCB trace animation, rotating gear, streaming build-log terminal.
    • Industry-specific custom-service copy for fintech / SaaS / health / e-commerce (HU + EN).
  2. 26 / design

    Service illustrations overhauled · denser motion, richer depth

    • AI illustration · now has rotating grid backdrop, breathing core halo, inner ring of smaller hexes, pulse particles on every edge.
    • Blockchain illustration · floating energy arc, hash labels below each cube, pulsing block heads, dust motes.
    • Cyber illustration · layered rotating defense rings, intercepting threat arrows with impact flashes, animated lock icon.
    • Web illustration · three stacked browser windows with floating cursor, animated content bars, grid plane beneath.
    • Mobile illustration · three phones (iOS + Android + offline), live push notification pop-in, progress bars, tile grid.
    • All six now render at 16:9 on mobile project cards · no more cropping.
  3. 25 / design

    Project videos unified to 16:9 aspect ratio

    • All 14 project detail pages now render the hero video at consistent 16:9.
    • Removed the lg-breakpoint switch (previously 16:10 desktop, 16:9 mobile) for visual consistency.
    • Video cards on the home carousel already used 16:9 · this aligns the detail view with the card preview.
  4. 24 / content

    Glossary expanded to 95 terms · embedded, AI 2026, compliance

    • Embedded / custom: firmware, iot-ota, hsm, opc-ua, modbus.
    • Web 2026: service-worker, speculation-rules, schema-org, edge-function.
    • Compliance: dora.
    • IndieWeb: webfinger.
    • Internal auto-link from blog post tag chips to glossary now covers 12 more tag clusters.
  5. 23 / content

    Topic clusters · 10 new pillar pages

    • /topics/embedded-firmware · Rust, C, OTA, industrial protocols.
    • /topics/saas-observability · OpenTelemetry, SLOs, error budgets.
    • /topics/hu-healthcare-tech · EESZT, HL7, FHIR, DICOM.
    • /topics/pwa-offline · Service Worker, offline-first architecture.
    • /topics/open-source-engineering · licensing, maintainer patterns.
    • /topics/gdpr-ai-data · DPIA for AI systems.
    • /topics/schema-org-seo · JSON-LD + structured data.
    • /topics/shopify-headless · Hydrogen + Oxygen.
    • /topics/erc-4337-account-abstraction · paymaster patterns.
    • /topics/indieweb-federation · Webmention + WebFinger.
  6. 22 / content

    Comparisons · 10 new decision-frame pages

    • Rust vs C embedded · 2026 decision frame.
    • Kafka vs RabbitMQ vs NATS · messaging.
    • ESP32 vs STM32 vs Raspberry Pi · IoT hardware.
    • Playwright vs Cypress vs Vitest Browser · E2E testing.
    • Sanity vs Strapi vs Contentful · headless CMS.
    • OpenAPI vs GraphQL vs tRPC · API layer.
    • Neon vs Turso vs PlanetScale · serverless DB.
    • Vitest vs Jest vs Deno.test · JS test runner.
    • Sentry vs Rollbar vs Bugsnag · error tracking.
    • Lemon Squeezy vs Paddle vs Stripe for indie SaaS.
  7. 21 / resource

    10 new free resources · embedded CI, DORA, Turso, ERC-4337, IoT fleet, HL7 bridge, Schema.org, Playwright, AI Act, CWV field data

    • Embedded firmware CI/CD template (YAML + MD).
    • DORA operational resilience testing playbook (MD).
    • Turso / libSQL starter for edge-first SaaS (SQL + MD).
    • ERC-4337 paymaster starter (Solidity + MD).
    • IoT fleet dashboard template (TS + MD).
    • HL7 v2 to FHIR bridge template (TS + MD).
    • Schema.org + JSON-LD cookbook · 35+ types (JSON + MD).
    • Playwright E2E starter for SaaS (TS).
    • EU AI Act readiness self-check 2026 (MD).
    • Webshop CWV field data sample · anonymised 6-shop dataset (CSV).
  8. 20 / content

    10 new blog posts · embedded Rust, OPC-UA, SaaS tiering, CWV HU, prompt caching, push notifications, pgvector 10M+, NAV v3.1, signed OTA, Speculation Rules

    • Embedded Rust vs C in 2026 · pragmatic decision frame.
    • OPC-UA integration for Hungarian manufacturing.
    • SaaS tiering design · free/pro/enterprise that converts.
    • Magyar webshop CWV 2026 (HU).
    • LLM prompt caching · 60-80% cost cut.
    • Mobile push notifications · 2026 opt-in playbook.
    • pgvector at 10M+ rows · real numbers, index choice.
    • NAV Online Szamla v3.1 migracio (HU).
    • Signed-firmware OTA pipeline · 2026 default.
    • Speculation Rules API · near-instant nav.
  9. 19 / content

    Industry matrix extended · custom service copy for fintech, SaaS, health, e-commerce

    • Fintech custom: core-banking, SWIFT, HSM, regulatory reporting pipelines.
    • SaaS custom: tenant-migration tooling, custom importers, internal admin dashboards.
    • Health custom: HL7 / FHIR / DICOM bridges, medical-device firmware.
    • E-commerce custom: WMS, POS, fulfillment automation, loyalty integration.
    • Industry × service matrix now covers 6 services × 4 industries × 2 locales = 48 unique copy combinations.
  10. 18 / seo

    Sitemap milestone · 200+ indexable URLs across 4 sitemaps

    • Blog posts: 51.
    • Case studies: 16.
    • Comparisons: 26.
    • Topic clusters: 28.
    • Resources: 28 with downloadable assets.
    • Events: 13 upcoming.
    • Glossary: 95 DefinedTerm nodes.
    • Service pages: 6 (added custom-software).
    • Service x industry combinations: 24 programmatic pages.
    • Authors, tools, changelog, search + all the static routes.
  11. 17 / content

    10 new blog posts · NIS2, AI Act, Postgres migrations, RLS playbook, Hydrogen, Solana gotchas, ASO, agentic AI, mobile analytics, evals-as-code

    • NIS2 Magyarországon · gyakorlati útmutató (HU).
    • LLM evals-as-code · the CI gate we run on every RAG deploy.
    • EU AI Act felkészülés 2026 · 4-hónapos roadmap (HU).
    • Postgres migration · 5 mistakes that cost us weeks.
    • Multi-tenant SaaS on Postgres · the RLS-first playbook.
    • Shopify Hydrogen · when the setup cost pays back.
    • Solana smart contract gotchas · 7 EVM-brain traps.
    • ASO for Hungarian apps · 2026 playbook.
    • Agentic AI · the safe tool-use pattern.
    • Mobile analytics without cross-app tracking · post-ATT reality.
  12. 16 / portfolio

    10 new case studies added · health SaaS, DeFi DAO, logistics AI, marketplaces, HU fintech

    • AI support copilot for e-health SaaS · 38% deflection, 0 PHI leaks.
    • AI news aggregator · 12k MAU in 8 weeks.
    • Shopify Hydrogen migration · +41% mobile conversion, LCP 3.8→0.7s.
    • NIS2 readiness for energy SME · first audit passed clean.
    • AI routing platform for logistics · 17% fewer km, 22% better on-time.
    • Dual-gateway payments for HU marketplace · 0 lost tx in 6 months.
    • Mobile puzzle game launch · Expo-only, 60fps on mid-tier Android.
    • Internal RAG for law firm · 200+ lawyers, 0 incidents.
    • DAO governance dashboard · 30-day participation +89%.
    • B2B SaaS MVP · 0 → paying customer in 4 weeks.
  13. 15 / resource

    10 new downloadable resources · NIS2, SaaS pricing calc, Docker Compose, GH Actions, AI injection suite, mobile launch, DPA, MVP scope, onboarding emails, Foundry starter

    • NIS2 self-assessment for Hungary (checklist).
    • SaaS pricing calculator 2026 (CSV template).
    • Docker Compose SaaS baseline (YAML + MD).
    • GitHub Actions CI/CD template for SaaS.
    • LLM prompt injection test suite · 120 patterns (JSON dataset).
    • Mobile app launch checklist 2026.
    • Data Processing Agreement template for Hungary.
    • MVP scope worksheet · 4-week delivery.
    • SaaS onboarding email sequence · 7 messages.
    • Foundry invariant starter · smart contracts.
  14. 14 / content

    10 new topic cluster pages · multi-tenant SaaS, RAG production, GDPR, smart-contract security, CWV, AI agents, HU tax tech, startup MVP, mobile growth, DeFi

    • /topics/multi-tenant-saas - tenant isolation, RLS, tenancy patterns.
    • /topics/rag-production - retrieval, evals, cost, guardrails.
    • /topics/gdpr-compliance - DPIA, DPA, NAIH, AI-system privacy.
    • /topics/smart-contract-security - audit playbook, invariants, MEV.
    • /topics/core-web-vitals - LCP, INP, CLS deep-dives.
    • /topics/ai-agents - tool-use, MCP, multi-agent orchestration.
    • /topics/hungarian-tax-tech - NAV Online Invoice, EKAER, tax stack.
    • /topics/startup-mvp - 4-week MVP, validation, pricing, PLG.
    • /topics/mobile-growth - ASO, push, deep-link, post-ATT tracking.
    • /topics/defi-engineering - AMM, lending, oracle defences.
  15. 13 / content

    10 new comparison pages · Postgres vs MySQL vs SQLite, hosting, LLM providers, auth, payments, AWS vs Hetzner, CI, styling, PM tools, observability

    • Postgres vs MySQL vs SQLite for 2026 SaaS.
    • Vercel vs Cloudflare Pages vs Netlify.
    • OpenAI vs Gemini vs Claude for RAG.
    • Auth0 vs Clerk vs Supabase Auth.
    • Stripe vs Lemon Squeezy vs Paddle.
    • AWS / GCP vs Hetzner / OVH for SaaS infra.
    • GitHub Actions vs GitLab CI vs Buildkite.
    • Tailwind vs CSS Modules vs styled-components.
    • Notion vs Linear vs Jira.
    • Datadog vs Grafana Cloud vs Honeycomb.
  16. 12 / events

    10 new events on the calendar · NIS2 workshop, fintech roundtable, MVP webinar, AI Act workshop, CWV webinar, Foundry bootcamp, mobile masterclass, DORA workshop, year-end retro, hackathon

    • NIS2 workshop · Budapest · 2026-05-08.
    • Fintech breakfast roundtable · Budapest · 2026-06-04.
    • MVP sprint kickoff webinar · online · 2026-06-11.
    • EU AI Act compliance workshop · hybrid · 2026-09-03.
    • Webshop CWV webinar · online · 2026-07-23.
    • Foundry invariant bootcamp · Budapest · 2026-10-07-08.
    • Mobile app launch masterclass · online · 2026-08-27.
    • DORA operational resilience workshop · hybrid · 2026-11-12.
    • Year-end tech retrospective · Budapest · 2026-12-16.
    • Open source hackathon · Budapest + online · 2026-09-27-28.
  17. 11 / content

    Glossary expanded to 84 terms · DevOps, product, AI advanced

    • DevOps / SRE: kubernetes, terraform, observability, SLO, error budget, feature flag.
    • Product / growth: MVP, PLG, churn, ARR.
    • AI advanced: LoRA, agentic AI.
    • Cross-links from blog posts auto-route to relevant terms.
  18. 10 / seo

    Sitemap milestone · > 160 indexable URLs across 4 sitemaps

    • Main sitemap: ~160 URLs (home, services, industries, blog, case studies, comparisons, projects, topics, tools, resources, authors, changelog).
    • News sitemap: up-to-date for Google News.
    • Video sitemap: every project video entry.
    • Sitemap index: auto-discovers the 3 children + OpenSearch.
    • IndexNow automation ready to submit on every deploy.
  19. 09 / seo

    SEO surface at state-of-the-art · 35+ schema types, 4 feeds, 2 IndieWeb endpoints, PWA

    • Schema.org types emitted: Organization, LocalBusiness, ProfessionalService, Person, Blog, BlogPosting, NewsArticle, TechArticle, HowTo, Quiz, FAQPage, Service, FinancialService, MedicalBusiness, Store, Offer, OfferCatalog, VideoObject, SoftwareApplication, Course, CourseInstance, Dataset, DataDownload, DigitalDocument, ImageObject, ItemList, Quotation, BreadcrumbList, AboutPage, ContactPage, ProfilePage, PrivacyPolicy, TermsOfService, Review, AggregateRating, DefinedTermSet, DefinedTerm, Speakable, SearchAction, Event.
    • Feeds: RSS 2.0, Atom 1.0, JSON Feed 1.1, Google News.
    • IndieWeb: Webmention receiver + WebFinger.
    • PWA: full manifest with shortcuts + screenshots, Service Worker with 3-strategy caching, offline fallback.
    • Performance: Speculation Rules for prerender + preload on LCP image.
  20. 08 / practice

    Content velocity target · 2+ posts / week sustained

    • Blog post count: 41 (English + Hungarian).
    • Target: sustain 2 new posts per week through Q2-Q4 2026.
    • Dual-language wherever possible · HU market + EU search presence.
    • Topic clusters expected to fill out as posts land.
    • Translation pair expansion · goal: 20 translated pairs by Q4 (currently 10).
  21. 07 / release

    Free resources hub, Webmention receiver, WebFinger

    • Launched /resources with 8 downloadable checklists and datasets (AI security, smart-contract threat model, KYC provider matrix, Postgres RLS template, Hungarian fintech compliance timeline, RAG eval harness, Next.js CWV checklist, AI incident runbook).
    • Added /api/webmention receiver so IndieWeb sites can cite us cross-origin.
    • Added /.well-known/webfinger so Mastodon / ActivityPub clients can verify the founder's identity.
    • Added /changelog (this page) with per-entry Article schema.
  22. 06 / content

    6 new posts · Foundry invariants, HU payments, EIP-712, RN offline, MNB calendar, webshop experiments

    • Foundry invariant testing patterns · 8 patterns, Solidity code included.
    • Hungarian payment gateway comparison · SimplePay / Stripe / Barion / Revolut Business with fee math.
    • React Native offline-first · 4-layer architecture with SQLite + op-log + sync protocol + conflict resolver.
    • Webshop checkout conversion · 12 A/B experiments, uplift percentages.
    • EIP-712 meta-transactions · the 5 security concerns and 3 relayer architectures.
    • Hungarian fintech regulatory calendar 2026 · MNB, NAV, NAIH + EU obligations.
  23. 05 / tool

    Free AI Security Self-Audit tool launched

    • 15-question interactive self-audit across 5 domains · data, model, prompt, access, response.
    • Zero telemetry · runs 100% in-browser. Emits HowTo + Quiz + SoftwareApplication JSON-LD.
    • Pairs with a 2-week fixed-price deep audit offering.
  24. 04 / portfolio

    CVE-2023-27350 PoC added to portfolio

    • PaperCut MF/NG auth-bypass PoC · 1 HTTP POST → SYSTEM-level reverse shell.
    • Includes 4-second demo video, full schema (VideoObject + SoftwareApplication), HU + EN detail pages.
  25. 03 / release

    Author pages, topic clusters, search, and Speculation Rules

    • Launched /authors/dezso with ProfilePage + Person + ItemList schemas · every byline now resolves to one Knowledge Graph entity.
    • Built /topics/* cluster pages (6 clusters: ai-security, blockchain-audit, webshop, llm-rag, mobile-app, fintech) with CollectionPage + ItemList.
    • Launched /search with client-side filter + SearchResultsPage schema.
    • Enabled Speculation Rules API for prerender of top-nav links · near-instant cross-page navigation.
    • Added PWA enhancements (enhanced manifest, shortcuts, screenshots, Service Worker, offline fallback).
  26. 02 / release

    Hungarian /projektek URL + SoftwareApplication schema on app projects

    • HU deploys now serve /projektek as the canonical project URL; /projects 308-redirects. Hreflang pair on every project detail.
    • Added SoftwareApplication JSON-LD to every app-type project (11 projects): type + applicationCategory + operatingSystem.
    • Added Course schema to useaieasily for workshop offerings.
  27. 01 / schema

    Massive schema + feed expansion

    • Added JSON Feed 1.1, Atom 1.0, OpenSearch description alongside the existing RSS feed.
    • Shipped video-sitemap.xml + sitemap-index.xml.
    • Added FinancialService / MedicalBusiness Service subtypes on industry pages.
    • Added TOC ItemList JSON-LD on long-form blog posts.
    • Added h-entry + h-card microformats on blog + author pages.
    • Specialized legal page types · TermsOfService / PrivacyPolicy / AboutPage.
    • Added Apple / MS PWA meta tags with dark-mode theme-color pair.
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