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CoreDevStructure Engineering studio · Barcelona
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Tariffs · 2026 schedule

What it costs.

Four ways to work with us — fixed-scope builds, monthly retainers, prepaid engineering hours, and a spec builder for the in-between cases. All amounts in euros, exclusive of Spanish IVA at 21%.

DOC. IDCDS-RATE-2026
REV
7.4
STATUS
in production
CURRENCY
EUR · ex. IVA
LAST REVIEW
2026-06-12
§ 01 Build tariffs CDS-MS · MP · AP · PL

Four products. Fixed scope, fixed price.

CDS-MS-01

Microsite

A single landing page or short campaign site, shipped fast.

€3,890.00

1 → 2 weeks

  • Astro or Next.js project · static where possible
  • Headless CMS hooked up — Sanity, Storyblok, or your stack
  • Performance budget under 80 KB JS, LCP under 1.2 s
  • Cookie banner, analytics-free baseline, GDPR-clean
  • One staging URL, one production deploy

CDS-MP-04

Marketing platform

A complete marketing site — homepage, product pages, blog, careers, multi-locale.

€11,890.00

4 → 6 weeks

  • Next.js App Router · ISR · edge rendering on Vercel or Cloudflare
  • CMS with editor training and a 30-page Notion runbook
  • i18n routing for two locales · hreflang · canonical URLs
  • Form pipeline with rate limiting and webhook delivery
  • Lighthouse CI in pull requests · weekly perf reports for the first month
Most engaged

CDS-AP-09

Application

A full custom web application — auth, multi-tenant data model, dashboard, API.

€34,890.00

10 → 14 weeks

  • Next.js or Remix · Postgres · Prisma · tRPC or REST
  • Auth — passwordless email, OAuth providers, role-based access
  • Stripe billing wired end-to-end · subscriptions and invoices
  • Observability — Sentry, OpenTelemetry, structured logs
  • Architecture decision records · runbook · on-call handover

CDS-PL-12

Platform

Multi-product engineering — a public site, an admin app, a customer portal, a public API.

from €89,890.00

16+ weeks · co-written quote

  • Monorepo with shared design system and TypeScript packages
  • Discovery sprint with two of your engineers in the room
  • Public API with versioning, OpenAPI docs, rate limiting
  • Customer portal scoped to your real ops, not a template
  • Quarterly architecture reviews after launch
§ 02 Retainer plans CDS-RT-MNT · PTN

Monthly subscription. 30-day cancellation.

Billed monthly through Stripe. No annual lock-in. Either party can cancel with 30 days written notice.

CDS-RT-MNT

Maintenance contract

Keep what we built — or what someone else built — alive and unbroken.

€890.00/ month

  • Weekly dependency upgrade pass with a written changelog
  • Security patches applied within 48 hours of CVE
  • Two hours of small-fix work per month, billed against actual time
  • Monthly performance and uptime report
  • Slack channel reachable 09:00 → 18:00 CET on business days
Most engaged

CDS-RT-PTN

Engineering partnership

A dedicated engineering pair embedded in your roadmap.

€4,890.00/ month

  • Two engineers reserved at 50% of their week for you
  • Weekly planning session with your product owner
  • Direct GitHub access · pull requests reviewed within four hours
  • On-call rotation included for production incidents
  • Quarterly architecture review against your roadmap
§ 03 Engineering hours CDS-HR-10 · 25 · 50

Pay by the hour. Discount by the pack.

Prepaid engineering time for ad-hoc work — code reviews, small fixes, technical second opinions. Standard rate is €130 per hour. Larger packs come in cheaper.

10 hours · CDS-HR-10
A short turn — a single feature, a one-off audit, a tricky bug.
€1,290.00 €129.00 / hour
25 hours · CDS-HR-25
Most-bought pack — a quarter of focused engineering time.
€2,990.00 €119.60 / hour
50 hours · CDS-HR-50
A long arc — feature-flagged migrations, design-system rebuilds, perf overhauls.
€5,490.00 €109.80 / hour
§ 04 Spec builder CDS-BUILDER.tsx

Compose a build. Get an estimate.

Pick a tier, tick the modules you need, and we will send you a written quote. The total is illustrative — the final figure is always confirmed in writing before invoicing.

Spec composer · live CDS-BUILDER · v7.4

1 · Choose a build tier

2 · Add-on modules

Quoted estimate €0.00
§ 05 Frequently asked CDS-FAQ.md

Things people ask before signing.

Five engineers and a designer. Every brief is staffed with the two engineers best suited to it — not a junior who escalates to a lead. The director, Sergi, sits in on every kickoff and every production cutover.