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Jacar categories — explore the topics A rocket whose eyes follow your cursor.
Startup

NIS2 in Spain: a technical translation of 2026 obligations

The Spanish draft law transposing NIS2 is still in parliament in 2026, but the directive's technical obligations have applied since October 2024. Practical map: the ten minimum security measures, the 24-hour, 72-hour and one-month incident notification window, and the new supply-chain security obligations.

Mac

Essential Software for Your New M5 Mac (2026 guide)

100 must-have apps for your M5 Mac organised into 20 categories: browser, notes, terminal, IDE, containers, AI and more. Each pick with purpose, key features, plugins, pricing in EUR and the official link.

Architecture

Kubernetes 1.35 GA: an operations-side balance sheet

Kubernetes 1.35 GA consolidates three releases of work: native sidecars with full lifecycle management, generalised DRA for FPGAs and NPUs, and a scheduler that cuts resource waste by 15-25% in heterogeneous clusters. An operations-side balance sheet: what to enable now, what to watch before migrating, and what path to follow from 1.30.

Technology

NVIDIA alternatives in 2026: where the market is heading

NVIDIA still dominates frontier-model training in 2026, but inference tells a different story. AMD MI300X/MI325X with mature ROCm, Intel Gaudi 3, Google TPU v6, and AWS Trainium/Inferentia deliver 20 to 50% lower cost per token without sacrificing quality. Here is when to choose each option.

Startup

Startup Funding in 2023: Reality After the Correction

After the 2021 historic peak and the 2022 correction, startup funding in 2023 has been redefined: Series A rounds dropping from $15M to $8-10M, due diligence extending to 14 weeks, and metrics like the real Rule of 40 and NRR above 110% as the new minimum.

Architecture

Docker Swarm in 2023: When It Still Makes Sense

Kubernetes won the orchestration battle, but Docker Swarm stays maintained inside Docker Engine and makes real sense for small teams without dedicated SRE, self-hosted stacks on 1-5 VPS, and edge mini-clusters. In those contexts, Swarm's minimal learning curve and low operational cost outweigh Kubernetes's advanced features.

Industry 4.0

Humanoid robotics: beyond the viral videos

Humanoid robotics left the trade-show floor for factory floors and warehouses during 2025 and 2026. Which companies have really deployed units, which tasks fit, what real costs look like, and where humans remain unbeatable.

Technology

Next-generation NPUs: the hardware moving AI in 2026

NPUs stopped being an accessory and became the component that defines real performance in laptops, phones, and small servers. A practical look at the hardware that rules 2026, which workloads pay off, and where the traditional GPU still wins.

Methodologies

Carbon-aware scheduling by default: first balance

A principios de 2026, varias plataformas de orquestación incluyen carbon-aware scheduling como opción por defecto o muy visible. Con meses de datos reales, toca evaluar si la promesa de reducir emisiones sin dañar rendimiento se cumple y en qué escenarios.

Technology

XR, AR and VR in 2026: the honest state after the cycle

After the 2023-2024 hype cycle led by Apple Vision Pro, the 2025 valley of disillusionment, and the quiet but real consolidation of Meta Quest 3S and the WebXR stack, it is time to assess honestly where extended reality stands. What works, what has died, what is still alive.

Software Development

WASI preview 3: adoption and real cases

WASI preview 3 llegó como estándar estable a finales de 2025 y ha tenido unos meses para demostrar si realmente desbloquea los casos que preview 2 se quedaba cortos. Recorrido honesto por adopciones reales, bibliotecas maduras y patrones que empiezan a funcionar en producción.

Architecture

Kubernetes 1.35: what you can already see coming

Con 1.34 liberado en agosto de 2025 y el ciclo de 1.35 en su última fase de congelación de funciones, qué llegará estable, qué quedará en beta, qué nos interesa a quienes mantenemos clústeres pequeños o medianos y qué podemos ignorar sin culpa hasta el siguiente ciclo.

Technology

Observability tools I would recommend in 2026

After a decade of Prometheus, three years of consolidation around OpenTelemetry, and the open stack now mature with Grafana, Loki, and Tempo, concrete recommendations for teams starting or reviewing their observability layer: what fits, what is excess, and what to avoid.

Architecture

containerd with Wasm: mixed workloads in production

La integración de WebAssembly dentro de containerd como tiempo de ejecución alternativo ha madurado. Ya es posible desplegar cargas mixtas Linux y Wasm en el mismo clúster de Kubernetes con argumentos operativos sólidos. Cuándo compensa y cuándo no.

Technology

Quantum computing: real progress without hype

After a decade of grandiose headlines, quantum computing enters this cycle with more honest metrics, thousand-physical-qubit machines, and the first serious signs of error correction at scale. It pays to separate what already works from what remains research.

Architecture

gVisor: sandboxing for multi-tenant containers

gVisor interpone un kernel en espacio de usuario entre el contenedor y el anfitrión. Después de años en producción en Google y adopción creciente en plataformas serverless, merece una lectura honesta sobre cuándo compensa frente a microVMs y runtimes clásicos.