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• Developed APIs for developers which provides information about places in TomTom-powered maps, libraries, applications, and services worldwide which are published at Developer.tomtom.com/search-api.
• Successfully developed four new microservices from scratch including parking spaces, fuel prices, Rich POI, and charging availability services.
• Improved data release duration from more than eight hours to two hours by optimizing the data storage method, storing data in an embedded database (RocksDB) instead of a file system-based structure.
• Successfully switched the infrastructure from an Azure VM-based custom solution to an AKS (Azure Kubernetes Service) based one which decreases cost and improves the reliability of the services.
• Designed a processing pipeline for regularly fetching and parsing Foursquare data and incorporating it in the TomTom Rich POI service.
• Supported the product owner with the design of API fields in order to maintain the readability of the response and flexibility for further changes.

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• Managed the software development activities in a team of 5-7 developers utilizing Agile software development methodologies for the projects executed in several countries including Turkey, Austria, Saudi Arabia, Spain, and Norway.
• Developed an outage management system that detects and manages electricity outages in smart grid networks and also integrates with electricity distribution company ERP systems.
• Guided the software development team that developed the core components (outage management, mobile oms) and also built the integration with customer systems including SAP PM, SAP WFM, and SAP CRM.
• Actively participated in technical customer-facing meetings in order to collect requirements and decide on design approaches.
• Supported external projects in other countries, e.g., requirements collection in Spain and for implementation of the outage management module in Norway.
• Proposed new ideas to deal with customer requests in modeling low voltage network model of utility companies which has more than 2 million customer feeding points.
• Introduced innovative extensions to an outage management system such as a mobile application for customers. The source code for a simple prototype can be found here: Github.com/halilayyildiz/outagetracker.

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• Developed a data augmentation engine that augments any given text content by utilizing linked data sources and semantic web technologies.
• Implemented linked data vocabulary, information extraction, text mining algorithms (NER, WSD, and so on), and recommendation system algorithms (collaborative filtering).
• Contributed to an open-source software project, DBpedia, by implementing mappings for Turkish Wikipedia: http://mappings.dbpedia.org/index.php/Mapping_tr.
• Published a whitepaper and presented at Proceeding SWIM ‘11 Proceedings of the International Workshop on Semantic Web Information Management in Athens, Greece (Dl.acm.org/doi/10.1145/1999299.1999305).

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• Contributed to the Vitamin project back-end team which serves online educational content (animations, learning objects, games, exams, and so on) to a vast number of users (800,000+).
• Implemented an online testing platform where 100,000+ students take online tests concurrently and calculates the results afterward.
• Developed web-based online education components on the top of a distributed, scalable, and fault-tolerant infrastructure.