Technology
at the service of your business
We design complete technology solutions: software, systems, clusters, networks, high availability and embedded systems. We don’t just develop — we design, deploy and operate the entire stack.
Discover moreOur history
Jacar Systems was founded in 2002 from a passion for emerging technologies and people. More than two decades always working with the most current stack of the moment: from the first LAMP servers and the rise of AJAX, through cloud, containers and virtualization, to generative AI and autonomous agents.
We design complete technology solutions, not just code: high-availability clusters, communications and networks, embedded systems, virtualization, 24/7 observability and also web applications, APIs and ERP. In every project we integrate every layer — hardware, system, network and software — working as a single whole.
For us, a solid solution starts long before the code: by understanding the business, selecting the right technologies and designing each layer of the stack with intent.
Who we are
Mission
To help companies transform their operations with the most current technologies, without friction and with measurable results from the first month.
Vision
To be the technology partner of choice for SMEs and public administrations that want to adopt cloud, AI and automation without leaving behind the people who make the business work.
Purpose
For technology to stop being a barrier and become a lever. We accompany every client with transparency, commitment and a 100% pragmatic approach.
How we work
A proven process that minimizes surprises and maximizes impact.
Discovery
We understand your business, current processes, and real goals. No assumptions, no smoke and mirrors.
Design
We propose architecture, technologies and roadmap. We pick the right stack — not the trendy one for trend’s sake.
Development
Short iterations, weekly deliveries and full visibility. Clean code, tests and CI/CD from day one.
Deployment
Blue-green production rollout, team training, and complete operational documentation.
Ongoing support
24/7 monitoring, continuous support and joint evolution. We don't vanish once the invoice is closed.
Our values
Six principles that guide every technical decision and every conversation with our clients.
Commitment
We get involved in every project as if it were our own business.
Innovation
We apply the latest technologies to solve real problems, not to show off.
Results
We measure our success by the growth of our clients, not by billed hours.
Transparency
Full visibility on progress, risks and costs. No fine print.
Pragmatism
We choose the solution that works, not the most sophisticated. Simple scales better.
Long term
We build lasting relationships: several of our clients have been with us for more than five years.
What sets us apart?
Four things our customers consistently highlight.
Expertise in emerging technologies
We don't wait for a technology to be mainstream. We integrate generative AI, autonomous agents and new protocols (MCP, RAG) from day one so your products always stay ahead of the competition.
Multidisciplinary approach
We cover six complementary service lines: cloud, AI, custom development, ERP, agents and public sector. One team, one point of contact, no subcontracting of critical parts.
Native Spanish compliance
SII, Verifactu, Facturae, AEAT, FACe, Cl@ve, ENS, GDPR. We know every regulatory requirement and we integrate it as standard in every project — no surprises in the audit phase.
24/7 monitoring and support
Every project includes full observability with Prometheus, Grafana and Loki. Proactive alerts, clear SLAs and real on-call rotations — not an inbox no one reads.
Technical capabilities
We design and operate the full stack — not just the software running on top.
Systems design
Linux/BSD systems engineering, hardening, kernel tuning and automation with Ansible.
Clusters and HA
True high availability: Kubernetes, Docker Swarm, Patroni (PostgreSQL), Redis Sentinel, Keepalived.
Networks and communications
Topology design, VLANs, WireGuard/OpenVPN VPNs, BGP/OSPF, pfSense and OPNsense firewalls.
Embedded systems
ESP32, Raspberry Pi, Arduino. Sensors, LoRa/MQTT connectivity, firmware, edge AI inference.
Virtualization
KVM, Proxmox VE, VMware. LXC containers, snapshots, live migration and resource management.
Cybersecurity
Hardening, auditing, SIEM, identity management, MFA, encryption at rest and in transit, basic pentesting.
Observability
Prometheus, Grafana, Loki, Tempo, OpenTelemetry. Proactive alerts, SLOs and business dashboards.
Hardware and datacenter
Hardware selection, rack-and-stack, structured cabling, UPS, climate control, and on-site support.
Our track record
Twenty-five years adopting the technologies that define each era — from the first LAMP servers and Web 2.0 AJAX to AI agents running entire business processes.
Founded in Madrid
Jacar Systems is founded. First dynamic websites on LAMP, physical Pentium 4 servers on-premise, and 1 Mbps ADSL as the major advance in Spain.
PHP 4 MySQL 3 Apache
LAMP and .NET Framework 1.1
Two stacks accompany us: LAMP (Linux + Apache + MySQL + PHP) on the server and .NET Framework 1.1 with Visual Studio .NET 2003 for Windows applications. First Compaq iPaq PDAs with Windows Mobile 2003 for clients on the road. Wi-Fi 802.11g reaches the enterprise.
LAMP .NET 1.1 WM 2003
Web 2.0, Firefox, and .NET
Gmail launches 1 GB free. Facebook is born. Firefox 1.0 breaks IE's monopoly. The Web 2.0 era kicks off and CSS takes center stage. In parallel, corporate projects in .NET with Visual Studio and Windows Mobile 2003 SE PDAs for the sales force.
Firefox 1.0 .NET PDA WM 2003 SE
AJAX, .NET 2.0, and rugged PDAs
AJAX revolutionizes web applications (Google Maps, YouTube). PHP 5 with OOP. .NET Framework 2.0 with generics and Visual Studio 2005. ASP.NET 2.0 on the backend. Symbol/Motorola rugged PDAs with Windows Mobile 5.0 in warehouses and logistics. Multi-core reaches the desktop.
AJAX .NET 2.0 WM 5.0 rugged
AWS, jQuery, and .NET 3.0
AWS launches EC2 and S3 — the cloud computing era begins. jQuery 1.0. Git created by Linus Torvalds. Microsoft releases .NET Framework 3.0 with WPF, WCF, and Workflow Foundation — our Windows applications take a leap forward in interface.
AWS EC2 .NET 3.0 WPF Git
iPhone, .NET 3.5, and rugged PDAs
The iPhone redefines personal computing. .NET 3.5 with LINQ and Visual Studio 2008. Windows Mobile 6 on rugged PDAs (Motorola MC9090, Symbol, Intermec) for warehouses, stores, and field service at retail and logistics clients. Wi-Fi 802.11n quadruples bandwidth.
iPhone .NET 3.5 LINQ WM 6 rugged
Chrome, GitHub, and ASP.NET MVC
Google Chrome revolutionizes browsers with V8. GitHub is born and redefines collaboration. Android 1.0 hits the market. .NET 3.5 SP1 and first preview of ASP.NET MVC. Windows Mobile 6.1 PDAs still dominating field service. Bitcoin whitepaper published.
Chrome ASP.NET MVC WM 6.1
NoSQL and Node.js
Node.js, MongoDB, Redis and Cassandra arrive — the NoSQL movement. Google introduces the Go language. Event-driven architectures enter our projects.
Node.js MongoDB Go
LTE and tablets
Commercial LTE, the iPad is born, Instagram and Chrome OS. HTML5 takes off and we abandon Flash. Ubuntu Unity. The rise of content delivery networks.
4G/LTE HTML5 iPad
HTML5, WebRTC, and IPv6
HTML5 consolidates. CSS3 sees mass adoption. WebRTC is born. World IPv6 Day. SPDY (the seed of HTTP/2). Plugin-free video calls begin.
HTML5 CSS3 WebRTC
Raspberry Pi and Big Data
Raspberry Pi launches — we start prototyping lightweight embedded systems. Hadoop 1.0 and the Big Data era. TypeScript announced by Microsoft.
Raspberry Pi Hadoop TypeScript
Docker is born — containers
Docker 0.1 released — the seed of modern containerization. AngularJS goes mainstream. React announced. After the Snowden affair, we push TLS everywhere.
Docker 0.1 AngularJS TLS everywhere
Containers in production
Docker 1.0 GA. We start deploying apps in containers on KVM hosts, and Nagios gives way to Zabbix. Swift launches at WWDC and Heartbleed is a reminder of how important patching is.
Docker 1.0 Bootstrap 3 KVM
Microservices and SDN
Distributed architectures on Node.js and adoption of software-defined networking (SDN) with OpenFlow for multi-tenant environments.
Node.js SDN systemd
HTTPS by default and IoT
React + PWA on the front-end. Let's Encrypt GA enables free HTTPS on every project. First IoT deployments with ESP8266.
React Let's Encrypt ESP8266
Orchestration and clusters
Kubernetes enters production. We design multi-node HA clusters. First serverless solutions with AWS Lambda and API Gateway.
Kubernetes AWS Lambda HA
TLS 1.3 and DevOps
GDPR forces a rethink of privacy. TLS 1.3 and DNS-over-HTTPS by default. CI/CD pipelines as a standard in every project.
TLS 1.3 CI/CD GDPR
Cloud-native, WireGuard, and 5G
Terraform, GitOps and IaC. Early adoption of WireGuard. First deployments around 5G and edge, Wi-Fi 6 in corporate environments.
Terraform WireGuard 5G / Wi-Fi 6
Zero-trust and remote-first
COVID pivot: WireGuard VPNs at scale, BeyondCorp-style zero-trust networks, real-time collaboration with WebRTC. Apple Silicon M1 changes the game.
Zero-trust WebRTC ARM64
Edge, QUIC, and eBPF
HTTP/3 + QUIC standardised. JAMstack at the edge. Adoption of eBPF for kernel-level network observability with Cilium. ESP32 in embedded.
HTTP/3 eBPF / Cilium ESP32
24/7 observability and HA
Cloud platform with Prometheus, Grafana and Loki. PostgreSQL HA with Patroni. k3s for lightweight clusters at the edge. OpenTelemetry as the standard.
Prometheus Patroni HA k3s
LLMs and vector DBs
GPT-4 in production, embeddings with pgvector, first copilots at clients. Explosion of NVIDIA H100 GPUs in datacenters. Starlink changes rural connectivity.
GPT-4 pgvector GPU H100
Agents, RAG, and MCP
Autonomous agents, RAG and the MCP protocol. Local LLMs with Ollama and llama.cpp on ARM64 and consumer GPUs. NPUs appear on client chips.
MCP RAG NPU
Modern ERP, AI, and Wi-Fi 7
Migration to modern ERP platforms with our own AI-agent pipeline integrated into the management core. Wi-Fi 7 reaches the corporate environment. ESP32-S3 with AI inference in embedded.
Modern ERP Wi-Fi 7 ESP32-S3
End-to-end automated BPM
Business processes automated with AI agents in production. Transition to post-quantum cryptography. Commercial RISC-V and MCP agents integrated with hardware.
BPM-IA Post-quantum RISC-V
Technologies we work with
A living stack that covers everything from hardware to AI.
Let's talk about your project
Tell us what you need. We listen, propose, and — if it fits — execute. No commitment, no unnecessary jargon.
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