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Business & Domestic Software Development, and Computer Facilities Management.

We design, build, and operate secure, delightful software—across web, mobile, smart-home, and cloud. From prototypes to production SLAs, we deliver measured impact for companies and households.

ISO-minded • SLA-driven
UK-based • Privacy-first
Managed Ops & Support
See Case Studies
24/7 Monitoring
Smart-Home Integrations
Web & Mobile Apps
Privacy-friendly by design

Services & Solutions

End-to-end delivery across product, engineering, and operations.

Web Applications

Secure, responsive SPAs and back-office portals.

Mobile Apps

iOS & Android with native performance.

Integrations & APIs

Robust REST/GraphQL, payments, identity, and IoT bridges.

Data & AI

Analytics pipelines, dashboards, ML inference & automation.

Smart-Home

Home automation, security cameras, sensors, energy monitors.

UX/UI Design

Research, wireframes, design systems, accessibility.

QA & Test Automation

CI/CD, unit/e2e tests, performance & security testing.

Maintenance & Managed Ops

Monitoring, backups, incident response, SLAs.

Industries Served

  • B2B SaaS & Professional Services
  • FinTech & Payments
  • Retail & E-commerce
  • Healthcare & Wellbeing (privacy-first)
  • Domestic / Smart-Home & IoT
  • Non-profits & Education

Why Choose Us

  • Measured outcomes: uptime, NPS, time-to-prototype
  • Modern stack with maintainable patterns
  • Security and reliability baked in
  • Transparent communication & roadmaps
  • Flexible engagements: fixed, T&M, retainers
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Projects Shipped
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Households Served
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Avg. NPS
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Uptime SLAs %
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Days to Prototype

Featured Case Studies

Real-Time FinTech Analytics

Problem: delayed insights for ops.
Solution: event streaming + dashboards.
Impact: decisions in minutes, not days.

B2B FinTech Data

See Case Study

Smart-Home Energy Optimiser

Problem: high bills & device silos.
Solution: unified IoT + schedules.
Impact: −18% energy usage.

Domestic IoT Automation

See Case Study

Unified Retail App

Problem: fragmented customer journey.
Solution: mobile wallet + loyalty.
Impact: +22% repeat purchases.

Retail Mobile API

See Case Study

What Clients Say

Structure & Flow

Discover

Goals, risks, and constraints aligned.

Design

Prototypes, UX flows, architecture.

Build

CI/CD, testing, security checks.

Evolve

Observability, roadmaps, iteration.

Tech Stack & Badges

TypeScript React / React Native Node.js .NET Python PostgreSQL Docker Azure AWS Home Assistant MQTT Terraform

Pricing & Engagement Models

Fixed-Scope

Clear deliverables & timeline. Ideal for well-defined projects.

Time & Materials

Flexible backlog & priorities. Transparent usage reporting.

Retainer

Ongoing maintenance, upgrades, and SLAs.

Quick Estimate

~ 200 hours
£90/h
Medium (adds contingency)
3 months
Estimate (excl. VAT)
£

Insights & Resources RSS

Choosing the Right Engagement Model

Fixed vs T&M vs Retainers—how to decide.

Read more

Smart-Home Security Basics

Hardening your network and devices.

Read more

From Metrics to Outcomes

Turn SLAs & NPS into action.

Read more

Frequently Asked Questions

Do you work with both businesses and households?

Yes—commercial software and domestic smart-home projects.

How do you manage security?

Threat modeling, secure defaults, secrets management, and regular testing.

What’s a typical timeline?

Discovery (1–2 weeks), Design (2–4), Build (4–12), Evolve (ongoing).

Do you provide maintenance?

Yes—retainers with monitoring, backups, and incident response.

Can you integrate with legacy systems?

We design safe adapters and migration plans to de-risk change.

Do you handle hosting?

We can provision and manage cloud resources on AWS/Azure.

How do you price projects?

Fixed scope for certainty; T&M/retainer for evolving needs.

What about data privacy?

Privacy-by-design, minimisation, and clear data retention policies.

Do you build native or cross-platform apps?

We choose the best fit—React Native, native, or hybrid.

Can you rescue troubled projects?

Yes—audits, triage roadmaps, and stabilisation sprints.

Do you offer accessibility reviews?

Yes—WCAG-aligned audits with actionable fixes.

How do we get started?

Book a consultation—share goals, constraints, and success metrics.

Ready to ship something great?

Book a call, download the brochure, or start a project brief.

Book a Call Download Brochure Start Project Brief

Contact Us

Or email assistance@jdlguardia.com

JDL GUARDIA LTD

Phone: 07874419561

Email: assistance@jdlguardia.com

Address (Registered office):
17 Diamond Street
London, England
SE15 6LX