Ridvan Ozaydin

Loupe is a protocol-independent service monitoring tool aimed at high volume ethernet traffic. Loupe captures layer 2 messages and reconstructs application layer messages, using its DSL performs, rule checks, and reacts accordingly.

I implemented UCP, SIP, SMPP, Radius protocol stacks, and an underlying non-blocking multithreading structure that communicates with Linux Kernel to cope with very high volume network traffic.

Nortel's VOIP solution.

Worked closely with Nortel's worldwide customers, including AT&T, Verizon, and Orange, to identify and solve their software, hardware, configuration, and signaling issues on VOIP systems.

An AMR geo-redundancy solution for electric distribution companies. It collects meter readings periodically and feeds data to accounting software at the end of the month cycle. Thousands of m2m devices were deployed and integrated with the system.

An on-board combat management system for small-sized naval vessels, including coast guard boats and patrol boats.

It was designed to be a cost-effective all-in-one solution that fuses incoming data from ship sensors like radar, AIS, and electro-optic and creates and operational image for the operator.

Designed for use on naval platforms in case of a catastrophic power failure, provides auxiliary power to onboard systems, and works in tandem with sibling units located in different parts of the ship.

Uses very high capacity replaceable batteries and weighs over one metric tonne. It has its HMI and integration with an integrated bridge control system (EPKIS) deployed on naval vessels and uses SNMP to communicate with battery packs.

Provides predefined guidance with kill cards to personnel to sustain and extinguish the fire.

It calculates evacuation routes and displays them on screens for safe evacuation. It is designed for ships and buildings, using the 3D model of the structure, and real-time information is displayed and updated on multiple screens.

A closed-circuit video solution for naval platforms that enables monitoring of all onboard video sources, including cameras and consoles, and records 7/24 to NAS devices.

Users can monitor any video source and reflect a large screen display for better navigation or other purposes based on user privileges.

Societies around the Baltic, North, and Mediterranean seas face serious maritime problems as a result of increasing vessel traffic. These societies have the need and higher demand to preserve safety and security and to respond quickly to possible incidents.

In Europe, such incidents often affect multiple countries and societies. Therefore international cooperation is essential to resolve these problems. Currently, information and invaluable intelligence from various third-party sources are potentially available. The FedSS project aims to access and incorporate this tremendous amount of structured and unstructured data into security management systems.

The main goal is to provide all partners with a new information-handling capability disclosing data sources on a secure need-to-share basis that uses semantic information techniques instead of syntactic protocols and where the information-handling capability is visualised via rich internet applications (RIA) on tablets.

Authentication GW deciphers set-top box device credentials and queries set-top box privileges from a remote server.

Completed for Ericsson and deployed to their premises, surpassing their code coverage test and performance requirements.

Funded by the Ministry of Science, Industry, and Technology. The project involved designing both hardware and software. PLC Communication GW provides the ability for PLC maintainers to connect on-premise PLC devices from remote over a secure connection and check PLC device health status and updating software.

Batteries included a portal for health tourism, a mobile app, a back end, and an integration portal with hospitals delivered to an international customer.

It allows people around the globe to book health care services and any additional packages if desired, including transportation from the airport, hotel reservations, and trips to historical places, all in one place.

A work-from-home portal for stay-at-home moms.

Hosted on AWS Cloud. The portal provides a job listing platform for home-staying mothers where they can continue working from home while nursing their children.

An automation platform to auto-accept Uber rides requests.

It's delivered to Uber car companies in Germany, allowing owners to create separate branches, thus letting them rent the solution and generate income.

An IoT operating system developed using microservices and Java technology stack along with Python, JavaScript, and AWS.

Mindsphere allows various agents to connect, store data, and get analytics services, alarms, and everything they would need

Media Server is a very high-performance SIP back-to-back user agent written with C++.

It performs basic calls, call transfer, blind transfer, and music on hold. Crafted explicitly for custom hardware with many parallel cores.

The Chat Feature Server is a communication channel that integrates messaging using XMPP with Afiniti's MegaACD solution and provides an API set for integrators to easily integrate messaging from mobile and web.

Mega ACD is the reinvention of call center software. It is an Avaya and Afiniti product.

Mega ACD aims to be very high performant with high throughput. Written in C++ with microservices architecture communication over shared memory queues. It is unique in the way services are connected to each other to achieve low latency.

A suite of comprehensive BDD tests to validate Handshake wallet behavior. Written with Gherkin and GoLang. Due to the sensitivity of the changes involving people's money, the heavy customizations we were doing to wallet software needed automatic validation. This comprehensive test suite provided some level of security.

Handshake is a decentralized, permissionless naming protocol where every peer validates and manages the root DNS naming zone.

The goal is to create an alternative to existing certificate authorities and naming systems. Namebase is a handshake exchange and NFT auction site.

Modified existing open source Handshake crypto wallet that provides primary functionality to interact with HNS blockchain.

Added further functionality to handle high-volume transactions and batched transactions to optimize bandwidth.

A Proxy for all deployed Handshake wallets that provides an API abstraction and presents the wallet farm as a single entity to the consuming back end.

HSD Proxy was the primary means to scale back-end wallets to handle the volume. It abstracted the complexity of managing multiple wallets away from the main application.

Call Manager is a comprehensive interaction recording solution for quality assurance, security, and customer service environments.

It easily adapts to the unique operational requirements of various call centers, supports any telephony environment, provides comprehensive multi-site call recording, and separates customer and agent speech through stereo recording.

It includes IP and phone number-based agent filtering and blocking features. It supports multiple UC/PBX vendors, including call centers and enterprises.

Starling is the next-generation Guest WiFi analytics, social WiFi, mobile engagement, and RTLS platform. The name was influenced by the movement of a group of starling birds that are both agile and flexible to adapt to the changes while providing a unique experience from different angles.

The Starling platform consists of use-cases that help venues enhance digital transformation by providing a seamless guest experience and enabling actionable location analytics.

Migrated the Ipera Starling Solution from AWS (non containerized, EC2-based solution ) to Azure AKS. The migration involved: containerization of the solution and creation of initial infrastructure with Terraform on Azure (AKS and external services creation); creation of Terraform scripts for the Starling solution; SSL certificate integration with Let's Encrypt; auto-renewal of certificates; NGINX Ingress controllers; TLS rules; and hared drives mounted to pods using Azure Object Storage. AWS ECR was used as a container repository and a cron job was created to inject ECR credentials to deployment.

A document/file management system built on top of AWS S3. The system provides a fine-level access control and permissions system. It also permits customers to access their audit records/results over the system using their provided access credentials. Notable features are that it is a role-based authorization system that uses AWS S3 as the backing storage solution. The system is cost-optimized (an API server runs on a single server), and it has a progressive web application design, low maintenance requirements, and full CI/CD integration.

Tellme is an internal feedback collection tool that allows employees to ask for feedback from their teams and colleagues.

It consists of a web application and mobile apps for iOS and Android. The mobile application was created using the Ionic framework, and the web application was made using AngularJS. The project back end resides in Azure Kubernetes Service (AKS).

The Order Book Management System is a collection of services that provide an exchange to alter/manipulate the order book. The system consists of several microservices communicating over a service bus (NATS) and a central management console. It provides configurable trade bots and integrates with a liquidity provider over the FIX protocol.

Designed and developed a smart garbage chute management system comprising electronic control cards and a centralized server. The system seamlessly integrates across multiple apartment flats, enabling rule-based control of garbage chute hatch doors. Leveraged WiFi communication to eliminate additional wiring, ensuring cost-effective installation and scalability. Delivered a user-friendly progressive web application (PWA) accessible via mobile devices and web browsers, providing streamlined management and monitoring capabilities.