High-Load Backend Development & Real-Time Data Systems in Europe
H-Studio is an engineering team focused on designing and building high-load backend systems, real-time data pipelines, and event-driven architectures for fintech, SaaS, and data-intensive products across Europe.
What we build
High-load backend platforms based on Java, Spring Boot, and Kotlin.
Real-time data streams and messaging with Apache Kafka.
Stream processing, event-driven architecture, and CQRS patterns.
Low-latency APIs and microservices for fintech and SaaS products.
Data storage and analytics with PostgreSQL and ClickHouse.
Autoscaling infrastructure on Docker and Kubernetes.
High-load and real-time use cases we support
Processing millions of financial transactions per second.
Real-time dashboards and analytics for product and operations teams.
Streaming data pipelines for logs, events, and metrics.
Customer activity tracking and personalization in real time.
Notification and messaging systems with strict SLAs.
Technology stack
We work with a modern high-load stack: Java 17/20, Kotlin, Spring Boot, Apache Kafka, PostgreSQL, ClickHouse, Docker, Kubernetes, Grafana, and Prometheus. We design systems for horizontal scalability, observability, and zero-downtime releases.
High-load engineering services in Europe
Our team helps European companies modernize legacy systems, migrate from monoliths to microservices, and design real-time data platforms that can handle millions of events per second while staying maintainable for in-house teams.
We are flexible and collaborate with trusted partners to bring your vision to life. While we specialize in key areas, we're open to exploring new challenges and delivering tailored solutions to meet your unique project needs
We are flexible and collaborate with trusted partners to bring your vision to life. While we specialize in key areas, we're open to exploring new challenges and delivering tailored solutions to meet your unique project needs
Our Services
Backend Solutions that Handle the Heat
High-load backends and real-time data systems for enterprise scale.
Event-driven architectures and microservices
Real-time processing with Kafka and streaming pipelines
Web & Mobile Application Development
Web and mobile apps built with React, Next.js, and Flutter for SaaS and fintech.
Cross-platform mobile apps with Flutter / React Native
Real-time UI with WebSockets and GraphQL subscriptions
Integrations & Automation
Unified data flow connecting CRMs, analytics, and backends.
CRM integrations (HubSpot and other platforms)
Marketing pipelines with GA4, GTM, and webhooks
Analytics & Optimization
Data warehouses, BI dashboards, and real-time metrics for data-driven decisions.
Data warehouses (ClickHouse, BigQuery)
BI dashboards and A/B testing frameworks
DevOps & Maintenance
CI/CD pipelines, Kubernetes orchestration, and monitoring for stable, scalable systems.
CI/CD pipelines (GitHub Actions, Jenkins)
Kubernetes orchestration and autoscaling
Product Strategy & Consulting
MVP planning, architecture reviews, and CTO-level advisory for technical decision-making.
Discovery workshops and roadmapping
MVP definition and architecture reviews
From backend architecture to analytics and automation, we help companies grow through clean engineering and measurable performance.
We are flexible and collaborate with trusted partners to bring your vision to life. While we specialize in key areas, we are open to exploring new challenges and delivering tailored solutions to meet your unique project needs.
We work with companies across the EU — including Germany, Netherlands, Estonia, Finland, and Sweden — helping engineering teams build high-load infrastructure, real-time platforms, and scalable digital products. Our European engineering team collaborates closely with EU-based fintech, SaaS, and data-driven companies, delivering mission-critical systems and architectures.
