Java Engineering & Modernization
JVM modernization, enterprise integrations, and secure backend engineering.
We build Java backend systems for teams modernizing JVM estates, integrating enterprise platforms, and operating security-sensitive business systems. This service is intentionally broader than Spring Boot delivery or microservices architecture: Java version upgrades, modular backend design, identity and integration layers, and long-lived system maintainability. If distributed service boundaries and event-driven architecture are the primary concern, use Java Microservices Development. If the main need is framework-first Spring implementation for APIs and business backends, use Spring Boot Backend Development.
Why Companies Choose Us
Experience with security-critical systems in finance, telecom, and enterprise environments
Deep expertise in JVM reliability, integration-heavy systems, and secure backend design
Strong understanding of EU requirements for security, data handling, and privacy
Ability to modernize legacy stacks without stopping business operations
Cost-efficient engineering with long-term maintainability in mind
Multilingual team accustomed to Mittelstand & international workflows
JVM Engineering & Modernization Scope
JVM Modernization & Modular Backend Architecture
- —Java 17/21 upgrades and dependency modernization
- —Modular systems using Spring Boot, PF4J, or OSGi
- —Monolith refactoring and service extraction where justified
- —Stable API and integration boundaries
- —DDD-informed module boundaries for long-lived systems
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
- —Outcome: audit-ready access control for enterprise workflows without workarounds.
Batch, Data & Workflow 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
- —Outcome: lower response times, fewer incidents, and predictable performance under load.
When You Need Java Development
Choose this service when you need:
Which service is the right fit?
Spring Boot Development
If you need framework-first delivery focused on Spring Boot APIs and business backends.
View serviceJava Microservices Development
If distributed boundaries, event-driven systems, and Kafka or messaging are the core focus.
View serviceBackend Development
If you need technology-agnostic backend delivery for APIs and integrations.
View serviceTools & 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
Founder-Relevant
Case Studies
PlayDeck - Powering Telegram's Gaming Ecosystem
How we built the backend architecture for Telegram's fastest-growing gaming platform.
VTB Bank
Real-Time Data Streaming Platform - High-performance data-streaming platform capable of processing millions of financial messages per second.
Societe Generale
Personalized Advertising & Credit Service Platform - Advanced financial services with real-time personalization.
Sber
Enterprise Data Analytics Platform - Comprehensive data processing and analytics solution for Russia's largest bank.
Togezzer - Social Commerce Platform
Creating a seamless social shopping experience with real-time recommendations.
Vulken FM
Inspection & Asset Management Platform - Internal survey and compliance system for facilities management with mobile inspection app and web-based admin platform.
FAQ
No. Spring Boot is one option inside this service, but the page is broader: JVM modernization, enterprise integrations, secure backend design, and long-lived Java systems.
Yes — monolith refactors, Java 8/11 → 21 upgrades, outdated deployments, SOAP services, etc.
Absolutely — we design systems for large SaaS platforms and high-throughput telecom and enterprise data pipelines.
Yes — ERP, CRM, payment systems, identity providers, & custom enterprise software.
Yes — DDD, CQRS, event-driven systems, integration architecture & migration roadmaps.
Java engineering and modernization for companies operating production backend systems. We support organizations with JVM upgrades, backend architecture, enterprise integrations, and secure Java systems based on the specific technical and regulatory context of each project. All services are delivered individually and depend on system requirements and constraints.