SOFTWARE ARCHITECTURE × ENTERPRISE AI

Intelligence,engineered.

From enterprise knowledge to intelligent products. From Java services to resilient platforms. Architecture that connects the whole system.

Fahri KayaSoftware Architect & Consultant
16+Years in enterprise engineering
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ONE CONNECTED ENGINEERING DISCIPLINE
JavaSpringSpring AIKafkaRedisKubernetes

01 / THE ARCHITECTURE MINDSET

Complexity is inevitable.Clarity is designed.

The architect’s work is to make the important decisions visible: where intelligence lives, how services communicate, who owns the data, and how the system behaves under pressure.

01 — AI

Intelligence with context

Spring AI, retrieval and governed tool use turn enterprise knowledge into useful application behaviour.

02 — SYSTEMS

Boundaries with purpose

Domain-led services, explicit API contracts and event flows make distributed systems understandable.

03 — PLATFORM

Operations by design

Delivery, security, resilience and observability are part of the architecture from the first decision.

02 / INTERACTIVE ARCHITECTURE STUDIO

See the system.Explore the decisions.

Three architecture patterns. Select a component to reveal its responsibility, technology and design decisions.

REFERENCE ARCHITECTURE

Knowledge → context → useful intelligence

Retrieval, model orchestration and governed tools within a secure application boundary.

Select a component to explore8 components · 7 connections

Compact view · component connections are listed in the inspector.

03 / INTELLIGENCE WITH ENTERPRISE CONTEXT

Your knowledge.A new interface.

SPRING AI / JAVA

A language model becomes valuable when it can retrieve the right information, respect access boundaries and connect to real business capabilities. Spring AI brings that orchestration into the Java ecosystem.

RAG / RETRIEVAL-AUGMENTED GENERATION

A grounded answer, step by step

  1. Prepare

    Parse, chunk and enrich enterprise content.

    DocumentReader · TokenTextSplitter
  2. Index

    Store embeddings with metadata and access scope.

    EmbeddingModel · VectorStore
  3. Retrieve

    Find relevant, authorized context for the question.

    Retriever · Metadata filters
  4. Generate

    Ground the prompt in retrieved source material.

    ChatClient · Advisors
  5. Evaluate

    Check source support, output structure and quality.

    Evaluation · Validation
Designed around relevance, provenance and control.

BEYOND ANSWERS

Intelligence that can work.

Tool calling and MCP connect the model to explicitly permitted business operations. Validate inputs, enforce authorization and keep consequential actions under control.

Tool callingMCPStructured outputs

DEPLOYMENT IS AN ARCHITECTURE CHOICE

Choose where intelligence runs.

Hosted model APIs, Ollama or vLLM through compatible endpoints. Select the model and serving approach around data boundaries, latency, cost and workload.

OllamavLLMModel APIs

04 / TECHNOLOGY ATLAS

[ 57 ]

Deep in the stack.Clear on the choices.

Explore the ecosystem by responsibility. Each technology has a place, a reason and a relationship to the rest of the system.

AI & INTELLIGENCE

From enterprise context to model-powered behaviour.

12

Spring AI

Java-native orchestration for chat models, retrieval, tools and structured responses.

Design note

Use ChatClient and Advisors to keep model interaction within application contracts.

AI & intelligence

Spring AI · RAG · Embeddings · Vector search · pgvector · Qdrant · Tool calling · Model Context Protocol · Structured outputs · AI evaluation · Ollama · vLLM

Java & backend

Java 17 / 21 · Spring Boot · Spring Data JPA · Hibernate

APIs & identity

REST · gRPC / Protobuf · GraphQL · SOAP · Spring Security · OAuth 2.0 · OpenID Connect · JWT

Spring Cloud

Spring Cloud Gateway · Spring Cloud Config · Spring Cloud LoadBalancer · Spring Cloud Stream · Spring Cloud CircuitBreaker · Resilience4j · Spring Cloud Sleuth

Data & caching

Oracle · MySQL · Sybase · MongoDB · PostgreSQL · Redis

Events & messaging

Apache Kafka · Apache ActiveMQ · Spring for Apache Kafka · Spring JMS

Delivery & quality

Docker · Kubernetes · Jenkins · Maven · Gradle · JUnit · Mockito · Apache JMeter · Git

Observability

Micrometer · Micrometer Tracing · OpenTelemetry · Prometheus · Grafana · ELK stack · Zipkin

05 / DECISIONS BEFORE CODE

The architectureis in the decisions.

A platform is more than its diagram. The quality is in the boundaries, contracts and trade-offs that make it work in production.

Service boundaries

Model business ownership, data boundaries and change frequency before dividing the deployment.

API or event?

Use REST or gRPC for direct interactions. Use events when workflows should progress independently.

Identity & access

Separate sign-in, API authorization and service identity. Enforce permissions at every relevant boundary.

Data consistency

Prefer owned transactions. Add outbox, idempotency and compensating workflows when the system needs them.

Resilience under pressure

Design timeouts, bounded retries, circuit breakers and isolation as a coherent failure strategy.

Grounded intelligence

Retrieve authorized context, preserve source references and validate model outputs before business use.

Where the model runs

Choose hosted or private inference around data boundaries, model fit, serving capacity and workload.

Evidence in production

Connect metrics, traces and logs with AI evaluations so decisions can be tested against real behaviour.

06 / YOUR ARCHITECTURE PARTNER

Software Architect & Consultant

Fahri Kaya.

I bring more than 16 years of enterprise software engineering experience to architecture, implementation and technical consulting. Through BNTech, I help teams connect established Java/Spring platforms with intelligent capabilities and a clear path to delivery.

“The best architecture makes the next decision easier.”
  • Architecture & technical direction
  • Hands-on engineering
  • Enterprise AI integration
  • Modernization & mentoring

07 / LET’S BUILD WHAT COMES NEXT

A complex challenge?Let’s architect it.

An AI initiative, a distributed platform, or a system ready for its next chapter. Tell me what you’re building.

PROJECT CONVERSATION

Give the idea a shape.

Capture the essentials, then download your brief or open an email draft addressed to Fahri.

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