Backend Development
Enterprise-grade reliability, startup speed.
We build high-performance backend systems in Berlin, designed for reliability, scalability, and seamless integration with complex business environments in Germany. Our team delivers microservices, APIs, data pipelines, and enterprise-class security — the same engineering standards used in fintech, telecom, industrial systems, and high-load digital products. From monolithic architectures to distributed event-driven platforms, we design and build backends that power real products at scale.
What We Deliver
Microservices & System Architecture
- •Java 21: Spring Boot, Spring Cloud, PF4J/OSGi
- •Monoliths, microservices, modular architectures
- •DDD, Event-Driven Architecture, CQRS
- •API gateways, service discovery, messaging
Database Engineering
- •PostgreSQL 14–16, ClickHouse, Oracle, Redis
- •Data modeling, indexing, partitioning
- •High-throughput analytics, OLAP queries
- •ETL pipelines (Batch + Streaming)
API Development & Integrations
- •REST API design (OpenAPI/Swagger)
- •SOAP services for enterprise systems
- •GraphQL APIs
- •Event streaming: Kafka
- •High-performance RPC with gRPC
- •Third-party system integrations (ERP, CRM, fintech, logistics)
Security & Authorization
- •Spring Security
- •Keycloak, Apereo CAS
- •OAuth2, SSO, MFA, JWT
- •Role-based access control (RBAC)
- •Audit trails & compliance workflows
Reporting & Analytics
- •PDF, XLS, CSV generation
- •BI integrations
- •Custom reporting APIs
- •Data aggregation (OLAP/ClickHouse)
Performance & Reliability
- •JUnit 5, Testcontainers
- •Load testing and profiling (CPU, memory, SQL)
- •Caching strategies (Redis)
- •Fault tolerance, retries, circuit breakers
When You Need Backend Development
This service is ideal for companies that:
Tools & Technologies
Languages & Frameworks
Java 21, Spring Boot, Spring Cloud, PF4J, OSGi
Databases
PostgreSQL, ClickHouse, Oracle, Redis
Protocols
REST, SOAP, GraphQL, Kafka, gRPC, WebSocket
Security
Spring Security, Keycloak, CAS, JWT, OAuth2, MFA, SSO
Testing & Optimization
JUnit 5, Testcontainers, JProfiler, YourKit, SQL optimization
Infrastructure
Docker, Kubernetes, Nginx, CI/CD pipelines
FAQ
What technologies do you use for backend development?
We primarily work with Java 21, Spring Boot, Spring Cloud, PostgreSQL, ClickHouse, Kafka, Redis, and secure authorization systems such as Keycloak and CAS.
Do you support enterprise-level security?
Yes. We implement SSO, OAuth2, MFA, RBAC, audit logs, and full enterprise authentication flows.
Can you integrate with our existing systems?
Yes. We work with REST, SOAP, Kafka, gRPC, and can connect to ERPs, CRMs, payment systems, and custom enterprise software.
Do you build high-load systems?
Yes — we build streaming, event-driven, and horizontally scalable architectures used by banks, telecom providers, and SaaS platforms.
Can you migrate a legacy backend?
Yes — we handle full migrations from monoliths, outdated Java versions, or legacy enterprise stacks.
Related Services
Related Articles
More insights and best practices on this topic