Software · cloud · cybersecurity · since 2017

The IT team your company doesn't have yet.

Update, 6 October 2026. What now has a firm date is mandatory B2B e-invoicing: Order HAC/1028/2026, in force since 6 October 2026, has started the deadlines of Royal Decree 238/2026 (twelve months for businesses with a turnover above €8 million and twenty-four for everyone else, i.e. October 2027 and October 2028 by our calculation). Spain's Ministry of Finance has announced that it will postpone VeriFactu to October 2028 so that it converges with e-invoicing, but that change is not yet in the BOE (Official State Gazette): until it is published, the dates set by Royal Decree-Law 15/2025 remain in force (1 January 2027 for Corporate Income Tax filers and 1 July 2027 for everyone else). We will update this page once the regulation is published.

We build custom software, operate your infrastructure and respond when things break. Not a generic marketplace, not a single overextended contractor. A serious team, available by module.

Capabilities
Development Cloud DevOps Data
The stack we run in production
LanguagesTypeScript · Python · Go · Rust
Front endReact · Next · Vue · Svelte
Back endNode · FastAPI · Spring · .NET
DataPostgres · ClickHouse · Redis
CloudAWS · Azure · GCP · OVH
DevOpsKubernetes · Terraform · GitHub Actions
SecurityWazuh · CrowdStrike · Cloudflare
ObservabilityGrafana · Sentry · Datadog
High availability
On managed cloud projects
Since 2017
Grupo Summum in Castile and León and the Canary Islands
Partner Microsoft · Sage · TeamSystem
This is what one of our deployments sounds like
→ sistemas deploy --env prod --service api ✓ tests passed (1,241/1,241) ✓ build signed · sha 9f3a82c ✓ canary 5% · p99 latency 124ms · errors 0 ✓ rollout completed in 4m 12s → sistemas status api.client.com healthy uptime 47d 09h 22m db-primary healthy replicas 3/3 cdn healthy hit-rate high
Sectors we operate in

Systems that hold .

We run critical production environments in sectors where downtime has a real cost. These are the ones we know best.

E-commerce & fashion
Industrial & automotive
Winery & agriculture
Public sector
Banking & insurance
Rural hospitality
B2B SaaS
Logistics

Infrastructure shows when it breaks . And when it doesn’t.

— Operating principle · Summum Sistemas

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