Hire the Best Java EE Developers in Istanbul, TR

Java Technologies Java SE, Java EE, JavaFX, Spring, Spring Boot, Spring Cloud, Vaadin, Hibernate, Restlet, Maven Android Programming, Ormlite, Eventbus, Butterknife ActiveMq, Kaazing Web Socket Server Apache Tomcat, Glassfish Jetty Javascript Technologies React, Redux, Redux Saga, Redux Thunk React Native IOS/Android Mobile App Development Angular Typescript Javascript (Ecmascript 6) Node.js C/C++ Technologies C/C++, STL, Boost, Nokia Qt, Emweb Wt (Webtoolkit), MFC System Programming Unix/Linux system programming (Posix and System V api) Linux kernel and device driver(kernel module) programming Windows system programming (Win32 Api) Database Technologies Oracle 10g, Oracle Forms&Reports, MariaDB, Mysql, MongoDB, CouchDB, CockroachDB Cloud Technologies Kubernetes, Google Cloud, Amazon Web Services CI/CD Technologies Gitlab-CI, Travis-CI, Jenkins Server Technologies Nginx Server (Nginx Module Development), Apache, G-Wan, Gdnsd dns server(gdnsd module development) Streaming Technologies Wowza Stream Server, Nginx Rtmp Module, Red5 Stream Server, Ffmpeg Reverse Engineering apktool, dex2jar, jdgui, jadx, ApkStudio for Android APK decompiling Gdb, Immunity Debugger, ollydbg, edb, x64dbg, Ida debugger, PEBrowse64, nasm Scitools Understand Vulnerability Scanner Tools Nessus, Netsparker Others Git (Gitlab, Github), Docker C# Programming Language, Net Framework, WPF x86 Assembly language (real mode, protected mode) Low-level network programming (libpcap, libnet) Shell programming (bash) Php Programming Language UML, Mindmapping IpTables, Netfilter, Mikrotik & Mikrotik Api, Network Analizing Tools (Wireshark, tcpdump etc.) Asterisk Xml-Rpc, Rpc, Xen Api, Xen Cloud Restful Api and Api Design Arduino, Raspberry PI etc. Adobe Flash, Actionscript 3 Adobe Photoshop Sketch UI/UX Design Machine and Robotic Design Adobe Audition Autodesk Fusion 360 Solidworks, Solidcam

I’m a Senior Software Engineer with 17+ years of experience designing, developing, and improving enterprise and large-scale software systems. My core expertise is backend engineering with Java and the Spring ecosystem, complemented by extensive experience in distributed systems, cloud technologies, data engineering, system architecture, and more recently, Generative AI. Most recently, I have been working with Omio, a global multi-modal travel platform, where I contribute to backend services and data-driven products operating at scale. My work spans Java/Spring Boot services, REST APIs, PostgreSQL, Couchbase, BigQuery, Google Cloud Platform, Docker, Kubernetes, and CI/CD infrastructure. At Omio, I have also been heavily involved in integrating Generative AI into production applications. I have designed and implemented OpenAI-powered content generation workflows, structured prompts, localization pipelines, bulk generation APIs, and validation processes. These solutions combine AI-generated content with large internal travel datasets to power features such as destination guides, station information, route content, and travel recommendations. A significant part of my work involves working with large datasets across searches, journeys, routes, carriers, stations, and bookings. I design data pipelines and aggregation processes, investigate data quality and coverage issues, optimize complex BigQuery workloads, and turn large volumes of travel data into information that can be consumed by customer-facing products. Before Omio, I spent many years developing enterprise applications in the financial services industry, primarily using Java, Spring, and JEE. I worked with global technology and consulting companies including Accenture and Ericsson, collaborating with both onshore and offshore teams and taking responsibilities as a Senior Developer and Team Lead. I also worked as a Team Lead at a fintech startup developing a robo-advisor platform. I redesigned significant parts of the application's core architecture to address performance and scalability issues, reduce the cost of future development and refactoring, and improve the overall user experience. I designed and developed backend services using Spring Boot, Spring Data, Spring Security, and Spring MVC. Throughout my career, I have worked across the full software development lifecycle—from architecture and technical design to implementation, code review, testing, deployment, monitoring, and production troubleshooting. I am comfortable working both independently and as part of cross-functional and distributed teams, collaborating with engineers, product managers, designers, data teams, and business stakeholders. My main areas of expertise include: • Java, Spring Boot, Spring Framework, WebFlux/Reactor and REST APIs • Backend architecture, distributed systems and microservices • PostgreSQL, Couchbase, BigQuery and large-scale data processing • Google Cloud Platform, Docker and Kubernetes • Generative AI, OpenAI APIs, prompt engineering and AI-powered applications • CI/CD, Jenkins, automated deployment and software quality • Prometheus, Grafana and production monitoring • System performance, scalability and architecture modernization • Technical leadership and cross-functional collaboration I’m particularly interested in projects where strong backend engineering meets data and AI—whether that means designing scalable services, modernizing an existing architecture, solving complex performance problems, building data-intensive applications, or integrating Generative AI into real-world products.

I have +20 years of professional experience and an MSc degree in Computer Engineering from the top university in Turkey. Currently continueing PhD. Expert in mobile software development, enterprise software development, web development, cloud, iot and microservices. I have built several mobile and web based platforms and IoT servers running in cloud as PaaS or using SaaS. I have also experience in Embedded Linux, kernel device driver development. I have built people finder service, vehicle tracking system, satellite navigation systems, location enabling server, GSM-R tools, mobile number portability platform, IPTV platform, service delivery platform, IMS platform, Vodafone etopup platform, revenue assurance system, CRM, customer provisioning & billing system, electronic cash register, battery management system, national ID card reader, fiscal sales platforms, IoT gateway, IoT devices etc. I have completed web based enterprise platforms used by millions of users deployed in core platforms in mobile operators. Technologies Used: Java SE, Java EE (JPA, EJB 3.0, JMS, JMX, JaxWS, CDI, JSF), Android, Ionic Framework, Electron Framework, Angular 5-9, C/C++, Embedded Linux, Yocto, Bitbake Spring Framework, Spring WS, Spring Security, Spring SAML, Spring Boot, Rest, Amazon AWS, Microsoft Azure Cloud Native Application Development Redis Cache, EHCache Apache Mina, Oracle 11g-12c, IBM Websphere, Oracle Weblogic, Rational ClearQuest and Clearcase, IBM Requisite Pro, HPQC, Gradle, Jenkins, Fusion Middleware, QT Deep product and technology expertise in wide range of areas such as Embedded Systems, Security VAS, CRM, BPM, Mobile, OSS/BSS, IN, ITIL - Common Criteria EAL Certification, Application Security Architectures - Architecture and development of custom software and hardware (POS applications, Linux drivers, Web based platforms, highly transactional IoT servers, Big Data and self service reporting eTOM – SID Expertise, Middleware, SOA Based and Micro services based design and development

I bring over 10 years of full-stack development experience in the Java-Spring-Web ecosystem and Node.js. My expertise extends to front-end development, where I utilize React, Angular and Flutter frameworks. With a strong background in Java and NodeJS, I have contributed to various projects in fintech, telecommunications, insurance, and e-learning industries. I’m passionate about system design and clean, maintainable architecture, and I enjoy working in agile teams where collaboration is important. I focus on building reliable and scalable solutions that deliver real value. I’m also always learning and exploring new technologies, especially in areas like AI, distributed systems, and modern backend development, and I try to apply them in practical ways to improve systems. I consistently adhere to SOLID principles in my work. Software patterns play a crucial role in my approach, as they effectively address various challenges in object-oriented design. I am confident that my skills align well with your business needs. If given the opportunity, I am certain that I can deliver successful projects and supports. Backend : ✔ Java/Android ✔ Maven/Gradle ✔ Spring - Spring Cloud - Spring Boot - Spring MVC ✔ Rest APIs ✔ Hibernate ✔ Docker ✔ Git - Github - Gitlab - Bitcbucket ✔ Junit - Mockito ✔ Elastic Search ✔ Node.js ✔ Express.js Frontend Skills : ✔ Javascript ✔ React - Redux ✔ Angular Mobile : ✔ Flutter - Dart ✔ Firebase/Firestore Business Flow: ✔Jira - Confluence - Miro Databases : ✔ Mysql - Mongo - Oracle - IBM DB2 - PostgreSql I also use Copilot and Claude Code to deliver the best solutions. ✔ LLM integrations (OpenAI, Claude, etc.) ✔ AI-assisted workflow automation ✔ Prompt engineering & optimization ✔ AI code acceleration using tools like Cursor

Main Experiences; 1️⃣ OpenAI&VoiceAI Chat bot on telegram&discord 2️⃣ Solana, ETH, Base, Tron, BSC, Ton bot development, Snipe and Copy bots 3️⃣ Binance/Bybit/Bitget/Kucoin etc exchanges API integrations 4️⃣ Expert Telegram Bot development 🌱 I’m currently learning Microservice arc patterns, Failover scenarios, High load transaction management, and also Algorithms. Also working on Crypto platforms, bots, trading strategies, etc. 💬 Ask me about Java, TypeScript, Spring, Mongo, Hazelcast, Microservices ⚡ Fun fact I enjoy meeting new people, feel free to message

I am working as Senior software developer for a leading e-commerce site in turkey for 5 years.I asses feasibility of features, make estimation and implementations.I monitor and maintain our applications in production environment. I am already experienced java developer and using microservice architecture for many years.