Software Development
Custom platforms, APIs and internal tooling built for longevity.
IT Company · Est. 2018
See through the complexity of modern IT.
DOOR-KIJK engineers software, cloud and security systems for organisations where reliability, clarity and craft are non-negotiable.
- 120+
- Production systems shipped
- 99.98%
- Average platform uptime
- 38
- Engineers, designers & architects
ISO-aligned delivery·GDPR by design·SLAs that hold·EU engineering talent
// About
An IT studio shaped by engineers, not playbooks.
DOOR-KIJK is a Dutch word for “view through” — a transparent pane between you and the systems you depend on. We were founded on the belief that durable software comes from people who genuinely understand the domain, the constraints, and the human stakes behind every interface.
Clarity
Plain language, transparent estimates, honest roadmaps.
Craft
Senior engineers writing code that other engineers respect.
Continuity
Long-term ownership of what we ship together.
// Services
Six disciplines, one engineering practice.
We integrate across the stack so your platform, security and product roadmap evolve as a single system.
Web Engineering
High-performance web applications with refined user experiences.
Cloud Infrastructure
Resilient, observable systems on AWS, Azure and GCP.
Cybersecurity
Hardening, audits, identity, and continuous threat monitoring.
Data & AI
Pipelines, analytics and applied ML in regulated environments.
Digital Consulting
Architecture review, modernisation and engineering leadership.
// Software Development
Custom systems built to outlast trends.
We design domain-driven platforms with explicit contracts, observability baked in from day one, and a test strategy that keeps deploys boring. From greenfield SaaS to refactors of two-decade-old monoliths, we make code that teams can keep evolving for years.
- Domain-driven backends in Go, Node and Python
- Event-driven and CQRS architectures
- Continuous delivery with measurable change-failure rate
- Long-term maintainability over short-term cleverness
// Web Engineering
The web, treated as a product surface — not a brochure.
Performance budgets
Sub-second LCP and zero layout shift, audited every release.
Accessibility
WCAG 2.2 AA delivered as default, not as a remediation phase.
Design systems
Composable component libraries with rigorous tokens.
Edge & SSR
Streaming React, edge runtimes, and global caching strategies.
// Cloud Infrastructure
Platforms that hum quietly at 3am.
Resilient multi-region deployments, infrastructure as code, and the operational discipline that turns “the cloud” into a competitive advantage rather than a runaway bill.
FinOps
Cost visibility & reduction
SRE
Error budgets and SLOs
IaC
Terraform + GitOps
// Cybersecurity
Security that lives inside the build, not bolted on after it.
Threat modelling
STRIDE-based reviews integrated into every architecture.
Identity & access
Zero-trust foundations, SSO, granular RBAC and audit.
Continuous monitoring
SIEM, anomaly detection and incident playbooks.
// Digital Consulting
“Most technology problems are organisational problems wearing a hoodie. We help leadership teams see which is which — and what to do next.”
Engineering leadership · Architecture audits · Modernisation strategy
// Process
A four-step rhythm we keep honest.
- 01
Discover
Workshops to map goals, constraints, risks and opportunities.
- 02
Design
Architecture, UX and delivery plan calibrated to your team.
- 03
Build
Short cycles, transparent metrics, continuous deployment.
- 04
Operate
Observability, on-call, patching and platform stewardship.
// Technologies
The toolkit, sharpened.
We choose tools the way good chefs choose knives — by fit and feel, not fashion. Here’s what we reach for most often.
TypeScriptGoPythonRustReactNode.jsKubernetesTerraformPostgreSQLKafkaAWSGCPAzureSnowflakeGraphQLOpenTelemetry
// Industries
Where DOOR-KIJK delivers.
Financial Services
Compliant platforms for banks, insurers and fintechs.
Healthcare
Privacy-first systems for clinics, labs and health-tech.
Logistics
Real-time tracking, routing and fleet operations.
Manufacturing
IoT-enabled production lines and digital twins.
Public Sector
Modernisation of legacy services with secure delivery.
SaaS & Scale-ups
Engineering capacity for fast-growing product teams.
// Why DOOR-KIJK
The difference is in what we refuse to compromise on.
Senior-only teams
No bait-and-switch staffing. The engineers you meet are the engineers who ship.
Transparent delivery
Live dashboards, weekly demos and direct access to every contributor.
Fixed-shape engagements
Outcomes and scope agreed up front, with explicit change controls.
Knowledge transfer
Every project ends with your team confidently owning what we built.
// Team & Expertise
People who’ve done the hard versions before.
Our engineers have shipped systems at banks, broadcasters, hospitals and high-traffic consumer products. They write, speak, contribute to open source, and — most importantly — know which parts of the job are actually hard.
- 12y
- Avg. engineering experience
- 7
- Open-source maintainers
- 4
- Cloud architects on staff
// Selected work
Systems we’re proud of.
Fintech
Real-time settlement engine processing 4.2M tx/day
Re-platformed a legacy batch settlement system into an event-driven Go service with end-to-end tracing.
−68% latency
Healthcare
GDPR-aligned patient data lakehouse
Unified eight clinical sources into a governed Snowflake platform with row-level security and audit trails.
12 wks delivery
Logistics
Carrier orchestration across 11 EU markets
Built a multi-region Kubernetes platform routing 320k shipments per week with automated failover.
99.98% uptime
// FAQ
Questions, answered.
- What kind of engagements does DOOR-KIJK take on?
- We work on multi-month builds, platform modernisation, security hardening and embedded engineering teams. Typical engagements range from 8 weeks to multi-year partnerships.
- Do you work with regulated industries?
- Yes. We routinely deliver in GDPR, HIPAA, PSD2 and ISO 27001 contexts and adapt our practices to your compliance posture.
- Which cloud providers do you support?
- We are fluent across AWS, Google Cloud and Microsoft Azure, and design portable architectures using Kubernetes, Terraform and OpenTelemetry.
- How is your team structured?
- Small senior squads of engineers, designers and architects, paired with your team. No layered account managers between you and the people building your system.
- Where is DOOR-KIJK based?
- We are a remote-first company operating across the European Union, collaborating with clients in EMEA and North America.
// Contact
Start a conversation with DOOR-KIJK.
Tell us about your platform, your timelines and the outcomes you need. We’ll come back within two working days with a grounded, honest reply.
- [email protected]
- Website
- doorkijk.com
- Operating model
- Remote-first, EU based
- Response time
- Within 48 hours