Yordan Pavlov

A complex, modular, business to business product. It is used to describe the flow within a telecommunication network. Based on it, a telecom can offer various services to its users. The services can be described either as code or generated through a web interface. The technical implementation includes a parsing engine, various grammar analysis, modular architecture which connects it to the network through connectors.

The product is a communication layer between the company's service logic products and the company's voice products. It is a mediator between the complex telecom service flow and the relatively straightforward voice hardware. The technical challenges lay in overcoming hardware limitations and presenting a consistent and useful API to the upper layers.

A relatively small but smart library which does fast and robust logging. It offers the performance benefits of asynchronous file logging along with the consistency guarantees of synchronous logging. The implementation is multi-threaded and lock-free with various performance benefits.

A complex search engine with multi-million lines of code for airfares, flights, and auxiliary services. The product is among the very few of its class in the world. It offers sub-second searches among multi-gigabytes of air travel data. The technical challenges are various. Mostly performance and scalability related but also compliance with complex business logic.

A start from scratch product which specializes in searches related to merchandising and auxiliary products. Among the various performance challenges typical of such type of product, also some start-up specifics had to be handled. I was chosen among the lead developers to start on this project due to my extensive knowledge in the domain.

A library used for connecting proprietary as well as third-party systems. The library implements standard telecom protocols for connecting to the outside world. It also implements propriety internal protocols for connecting between in-house products. It needs to handle various requirements like of latency, handling connection problems, through output and others. The implementation is done in C++ on top of Linux POSIX sockets.