Available for new engagements

Cloud systems
built to stay up.

Core IT Solutions is a small, senior engineering team designing and building high-performance backends and cloud-native platforms — for companies in fintech, iGaming, and SaaS where downtime is expensive.

12+
years senior experience
3
focus domains
EU
based · working worldwide
Our values

Three principles
we don't negotiate.

Every decision — every line of infrastructure code, every incident response, every architectural trade-off — runs through these three filters.

/ 01
Pragmatism

We pick boring, proven technology over hype — and reach for the clever option only when the workload genuinely needs it.

/ 02
Reliability

Systems engineered for uptime, with SLOs, error budgets, and postmortems people actually read — not slideware.

/ 03
Scalability

Architectures that compound. What handles a thousand users today handles a million tomorrow without a rewrite.

What we do

Eight services.
One outcome: systems that ship.

Cloud and backend engineering — from hands-on build to technical consulting and architecture audits. Pick the pieces you need, or let us own the platform end-to-end.

Technology stack

The tools, used deliberately.

We choose technology based on the problem — not the hype cycle. Here's what's in the toolbox.

Languages
Programming Languages

Typed, production-proven languages. We pick the right one for the workload — not the trendy one.

TSTypeScript
JSJavaScript
JvJava
PyPython
Latest insights

Notes from
the engine room.

Deep-dives on architecture, infrastructure, and the patterns that keep high-stakes systems running.

ArchitectureEvent-Driven Architecture in Fintech and iGaming: Why Milliseconds Matter — Architecture article cover
Nov 20, 2025·12 min read

Event-Driven Architecture in Fintech and iGaming: Why Milliseconds Matter

How event-driven systems power real-time payments, live betting, and fraud detection at scale — the patterns, trade-offs, and lessons from running them in production.

Event-DrivenFintechiGaming
IndustryThe iGaming SaaS Revolution: How Platform Providers Are Reshaping a $333B Industry — Industry article cover
Nov 17, 2025·14 min read

The iGaming SaaS Revolution: How Platform Providers Are Reshaping a $333B Industry

Inside the explosive growth of iGaming SaaS platforms, from back-office solutions to full-stack providers powering the next generation of operators.

iGamingSaaSPlatform
AI & DevHow AI is Revolutionizing Software Development Speed — AI & Dev article cover
Nov 8, 2025·5 min read

How AI is Revolutionizing Software Development Speed

Where AI tooling actually speeds up software delivery — and where architectural judgment still can't be automated.

AIProductivity
BackendNestJS + Fastify: 2.5× Throughput for Microservices — Backend article cover
Oct 22, 2025·7 min read

NestJS + Fastify: 2.5× Throughput for Microservices

A like-for-like benchmark: swapping the NestJS adapter from Express to Fastify delivered a 2.5× throughput gain. Here's why — and where the real headroom lives.

NestJSFastifyMicroservices
SecurityK8s Security: Essential Best Practices for Enterprise Deployments — Security article cover
Oct 5, 2025·8 min read

K8s Security: Essential Best Practices for Enterprise Deployments

Protect your Kubernetes clusters with these critical security practices and lessons from recent breaches.

KubernetesSecurityDevOps
Get in touch

Tell us what you're
building.

Tell us what you're building, or book a 30-minute architecture call. A short note is enough — we read every inbound and reply within two business days.

Address
Core IT Solutions s. r. o.
Doležalova 3424/15C
82104 Bratislava-Ružinov
Slovakia