Java Development Services
Enterprise-grade Java engineering for secure, scalable, high-load systems.
We build high-performance Java backend systems in Berlin, engineered for reliability, security, and predictable scaling for companies across Germany. Our experience spans fintech, banking, telecom, logistics, and large enterprise workflows — environments where uptime, data integrity, and regulatory compliance are critical. Whether you're launching a new platform, modernizing a legacy Java stack, or scaling mission-critical infrastructure, we deliver production-ready Java systems built to handle real-world load, complex workflows, and long-term growth.
Why Companies Choose Us
What We Deliver
Java Microservices & Modular Architectures
- •Java 21, Spring Boot, Spring Cloud
- •Modular systems using PF4J / OSGi
- •Microservices, hybrid architectures, and monolith modernization
- •API gateways, inter-service communication, service discovery
- •DDD, event-driven architecture, CQRS patterns
Enterprise Integrations
- •REST, SOAP, GraphQL
- •Kafka event streaming
- •High-performance RPC (gRPC)
- •ERP/CRM integrations (SAP, 1C, Odoo, Dynamics)
- •Payment gateways & fintech APIs
- •Custom connectors for legacy enterprise platforms
Secure Authentication & Identity Systems
- •Spring Security architectures
- •OAuth2, SSO, JWT, MFA
- •Keycloak realm design & integration
- •Apereo CAS for enterprise-grade SSO flows
- •RBAC models, audit logs, access governance
High-Load Data Processing
- •Kafka → PostgreSQL / ClickHouse ingestion pipelines
- •Real-time and batch data processing
- •Distributed workers, async workflows
- •Financial reconciliation & transaction engines
- •ETL pipelines (batch + streaming)
Reporting & Analytical Backends
- •PDF / XLS / CSV engines
- •Aggregated analytics APIs
- •BI integrations (Tableau, PowerBI)
- •High-speed OLAP queries with ClickHouse
- •Time-series data storage & dashboards
Optimization & Reliability
- •CPU & memory profiling, GC tuning
- •SQL optimization, indexing, partitioning
- •Caching with Redis
- •Horizontal scaling strategies
- •Circuit breakers, fault tolerance, retries
- •Load testing and observability setup
When You Need Java Development
Choose this service when you need:
Tools & Technologies
Java & Frameworks
Java 21, Spring Boot, Spring Cloud, PF4J, OSGi
Databases
PostgreSQL, ClickHouse, Oracle, Redis
Messaging & Streaming
Kafka, gRPC, RabbitMQ, WebSocket
Security
Spring Security, Keycloak, CAS, OAuth2, JWT, MFA, SSO
Build & Testing
Maven, Gradle, JUnit 5, Testcontainers
Architecture Patterns
DDD, CQRS, event-driven systems, modular architectures
Infrastructure
Docker, Kubernetes, Nginx, Jenkins, GitHub Actions
Example Work (Case Studies)
FAQ
Do you work only with Spring Boot?
Yes — Spring Boot & Spring Cloud are our core for production-grade systems.
Can you migrate legacy Java systems?
Yes — monolith refactors, Java 8/11 → 21 upgrades, outdated deployments, SOAP services, etc.
Do you build high-load systems?
Absolutely — our systems run in banks, large SaaS products, and telecom data pipelines.
Can you integrate with our enterprise tools?
Yes — ERP, CRM, payment systems, identity providers, & custom enterprise software.
Do you provide architecture planning?
Yes — DDD, CQRS, event-driven systems, integration architecture & migration roadmaps.
Related Services
We work with companies in Berlin and across Germany, delivering Java development services, Spring Boot microservices, and enterprise backend systems. Our Berlin-based team specializes in high-load Java architecture, fintech Java development, Keycloak integration, and Java Spring Cloud services for secure, scalable enterprise applications.