11TH EDITION
SOFTWARE DEVELOPER CONFERENCE

10 May, 2025

FROM DEVELOPERS FOR DEVELOPERS

Java Day Istanbul is one of the most effective international community driven software conference of Turkey supported by Istanbul Java User Group. The conference helps developers to learn the newest technologies about Java, Web, Mobile, Big DATA, Cloud, DevOps, Agile and Future. Java Day Istanbul also helps developers, tech companies, and startups to establish a good network among them.

When

10 May, 2025

Where

Elite World Grand İstanbul Küçükyalı

11

17 550+

60+

EDITION

SPEAKERS

COMPANIES

ATTENDEES

Speakers

Speakers 2025

Get ready to join us in İstanbul to network with peers, learn about the latest industry trends, make new connections, and more #JDI25

Sander Hoogendoorn

CTO @ibood.com

Title: The Zen of Programming A Personal Journey Toward Writing Beautiful Code

Description: Discover "The Zen of Programming," where Sander Hoogendoorn shares insights from 40+ years of coding. Explore principles, intuition, beauty, and elegance in code while challenging paradigms such as DDD, TDD, TBD, OO, and FP. Find your path to writing beautiful, meaningful code.

Akın Kaldıroğlu

Co-Founder of BackendGuru

Title: Becoming Language, Becoming Functional

Description:

Mete Atamel

Developer Advocate @Google

Title: Beyond the Prompt: Evaluating, Testing, and Securing LLM Applications

Description: Evaluating and securing your LLM app is crucial. This talk explores:

Evaluation frameworks: Vertex AI, DeepEval, Promptfoo. Analyze LLM outputs with the right metrics.
Security frameworks: LLM Guard. Safeguard your app against prompt injections and harmful responses.

Kenan Sevindik

Software Architect @Udemy

Title: Building Reliable Microservices: Simplifying Functional Integration Testing with Ease

Description: Streamline functional integration testing for Kotlin microservices with our Acceptance Test Library! Test complete request-response flows with minimal mocks, real databases, and Kafka/Redis/ElasticSearch. Declarative setup, auto gRPC/REST/Kafka support—ensuring reliable, client-focused services!

Umut Ertürk

Principal Software Engineer @Udemy

Title: Building Reliable Microservices: Simplifying Functional Integration Testing with Ease

Description: Streamline functional integration testing for Kotlin microservices with our Acceptance Test Library! Test complete request-response flows with minimal mocks, real databases, and Kafka/Redis/ElasticSearch. Declarative setup, auto gRPC/REST/Kafka support—ensuring reliable, client-focused services!

Anshika Koul

Team Lead @Posten Bring AS

Title: Kotlin Multiplatform's Cross-Platform Brilliance at Norway's 377-Year-Old National Postal Service

Description: This session highlights KMP’s practical implementation,sharing lessons learnt, successes & key takeaways for developers facing cross-platform headaches. With playful storytelling & technical insights, attendees will gain basic knowledge to start POC, inspiring them to tackle unruly complex ruleset.

Pasha Finkelshteyn

Developer Advocate @BellSoft

Title: CRaCing Java Snapshots

Description: Java is not slow, but sometimes applications might take a long time to start. CRaC might solve this issue - imagine a Spring application starting in milliseconds! But of course, it has a price tag on it. In this talk, I want to talk about supporting CRaC in your application.

Jonathan Vila

Developer Advocate @Sonar

Title: Code Quality in the AI Era, Needed More Than Ever

Description: He will show how to implement Code Quality and Security in a frictionless way.

Andddd !!!! Now with all the GenAI generated code, can we rely on it? Is it save? Performant? I will show which is the reality of it and how to properly use it.

Reza Rahman

Principal Program Manager @Microsoft

Title: Effective Kubernetes for Java/Jakarta EE and MicroProfile Developers

Description: There are several key techniques to understand while using Kubernetes with Java EE, Jakarta EE, and MicroProfile applications. Examples include:

* How Kubernetes primitives (such as deployments and services) align with application server administration, clustering, auto-discovery, and load-balancing.
* How to add self-healing capabilities using Kubernetes probes and monitoring with open source tools like Prometheus/Grafana.
* How the CI/CD pipeline of your application can be adapted to Kubernetes.
* How Kubernetes can be extended using Operators to effectively manage application server clusters.

This entirely slide-free, demo-driven session walks through each of these considerations in turn. At the end of the session, you will have all the demos on GitHub so you can explore them on your own.

Ayşenur Külünk

Principal Data Scientist @Hepsiburada

Title: Optimizing Deduplication and Matching Processes for Millions of Products Using AI and Advanced Infrastructure in E-commerce

Description: Duplicate products negatively affect user experience and lead to operational errors on e-commerce platforms.

We optimize deduplication and matching processes for millions of products using artifcial intelligence, Milvus vector db, Java infrastructure, making our platform more efficient.

İlay İlter Kara

Senior Software Engineer @Hepsiburada

Title: Optimizing Deduplication and Matching Processes for Millions of Products Using AI and Advanced Infrastructure in E-commerce

Description: Duplicate products negatively affect user experience and lead to operational errors on e-commerce platforms.

We optimize deduplication and matching processes for millions of products using artifcial intelligence, Milvus vector db, Java infrastructure, making our platform more efficient.

Juarez Barbosa Junior

Developer Relations @Oracle

Title: Langchain4J - An Introduction for Impatient Developers

Description: LangChain4J is a Java-based library inspired by the popular Python library LangChain. It is a framework for Generative AI applications, allowing developers to connect various building blocks easily to create powerful AI applications.

Cristian Schuszter

Solutions Architect @CERN

Title: Identity Crisis: Bending Spring Security to Your Advanced Use-Cases

Description: Configuring Spring Security for an application is often quite a painful topic for development teams, and it's easy to get wrong.

It's going to be a wild ride of amazing Spring Security patterns, culminating with how to properly do user impersonation in your apps.

Altuğ Bilgin Altıntaş

Software Architect@ING Türkiye

Title: Effective Java Workshop

Description: Java is a great programming language but has some known flaws, common pitfalls. This workshop is based on Joshua Bloch’s “Effective Java.” 3rd edition book. It contains 40 sections, called “Items”, that give the attendees valuable advice on different aspects of the language.

This workshop consists of several “items,” each presented in the form of a short, stand-alone essay that provides specific advice, insight into Java platform subtleties, and updated code examples. The comprehensive descriptions and explanations for each item illuminate what to do, what not to do, and why.

Laurent Doguin

Developer Relation @Couchbase

Title: Building Ai Agents with Shell Scripts

Description: When considering an AI agent in its simplest form, it can be understood as a system with one or more inputs that takes action(s) based on those inputs, produces outputs for other actions, and continues this process iteratively.

For developers, there are various approaches to building such systems, including workflow engines, no-code solutions, or simply coding. However, one of the most familiar concepts for devs is shell scripting, where CLI output is piped to other CLI tools using the "|" character. A powerful feature for one-liner, but devs can always do more thanks to flow control and variables supported in most shell.

Over time, numerous shells have evolved, with new ones still being created from scratch,because devs still spend time in the terminal.

For example, shells like zsh and fish have become increasingly popular, and Nushell is one of the latest additions, offering a native way to manage tabular data - ideal for handling structured inputs and outputs.

This talk will explore AI agents from the perspective of a generalist developer, demonstrating how to build AI agents using Nushell and Couchbase as vector database.

Schedule

Attending Companies

Java Day Istanbul is one the the biggest software conference in Turkey, proudly announces its impressive lineup of companies participating in the 2025 event!

Akbank
Akbank Teknoloji
Allianz
Amadeus SAS
Assitt
Backendguru
Commencis
Emlak Katılım
Garanti

Migros TAS
Payten
Sahibinden
Siemens
Sisal
Tubitak YTE
Valueset

GEMFORCE
GG Tech
Havelsan
Hepsi Burada
Jmix
Kartezya
Kentkart
Mavidev
Meteksan

When

10 May, 2025