# Kagan T. > Software Engineer Location: San Francisco, California, United States Profile: https://flows.cv/kagan - Wizard, hand-on software architect: committer to open source projects: Apache Spark / Salesforce - Expert in functional programming with Scala. Github: https://github.com/kturgut/ - Passionate about aggressively scalable distributed systems, big data analytics, machine learning - Verifiable track record of delivering industry leading products from inception to market penetration. - Results oriented execution, and resourceful, innovative leadership whether working with small growth oriented startups or large corporations with omni-channel presence. Technology Expertise: - High performance big data processing and analytics: Spark, Redshift, Cassandra, Neo4J - Algorithms: Entity Linking, Deduplication, Locality Sensitive Hashing, DBScan - AutoML, Spark ML, Recommender systems, - Micro Services, API Management, Containers, Eclipse, OSGI - AKKA, Scala, Kafka, Reactive, Distributed Cloud computing, (SaaS- PaaS) - Enterprise Data Architecture, Data Security and Governance, TOGAF - Model driven Software, Domain Specific Lang (DSL), Functional programming ## Work Experience ### Software Engineer @ Tubi Jan 2022 – Present Responsible for the heaviest hit Tubi service "FeatureStore" serving as the backbone of the machine learning infrastructure. (Tech stack: Akka; Scala; Scylla) Within a few months stabilized the service experiencing frequent service degradations and occasional meltdowns with latencies measured in seconds. Now it handles up to 300K requests/sec with ultra low latencies (<~15ms) under 2x load. These improvements came perfectly in time for the world cup Tubi proudly broadcasted without any technical hick-ups. ### Sr Staff Software Engineer @ Conviva Jan 2021 – Jan 2022 Hands-on, lead engineer in big data processing, performance engineering, analysis and machine learning. Processing measurements of 500 million unique viewers watching 150 billion streams per year with 1.5 trillion real-time transactions across more than 180 countries ### ML Engineer @ dotData Jan 2019 – Jan 2020 | San Mateo Develop and enhance core AutoML engine where we automatically analyze customer data and extract thousands of features and feed to our model factory and then auto produce the best models leveraging the best features are presented to our customers - without writing any custom code.. - Develop operators for time oriented features, histogram, target encoding; distributed geolocation matching with dbscan etc. - Improve the architecture for better performance and scalability, extensibility ### Principal Consultant @ Brane Analytics / TIBCO - Data Science Platform Jan 2018 – Jan 2019 Lead architect for Tibco's flagship Data Science platform, that is unique in its ability to deploy machine learning models across various execution environments such as relational systems, R, Spark, and Cloudera etc. Define the architectural roadmap to upgrade it to work with Spark 2 with AKKA messaging as well as prepare it to run on the Cloud. ### Sr. Enterprise Data Architect @ Change Healthcare Jan 2017 – Jan 2018 | San Francisco Bay Area Change Healthcare processes ~80% of US healthcare data.  Reporting to the CTO and 2 SVPs, responsible for architecture of the data platform architecture addressing: acquisition, data processing, and publishing to consumers and analytics apps; porting the data platform to AWS. Provide technical leadership to teams collaborating during AWS data lab summit. 
Prototyped patient de-duplication POC using locality sensitive hashing algorithm from Spark ML which demonstrated 25x performance improvement over existing implementation at 1/10th hardware. Developed a policy driven access management platform using micro-services architecture with AKKA to support 10B authorizations per day, leveraging AWS IAM. ### VP Technology @ Oolong Jan 2016 – Jan 2017 | San Francisco Bay Area Build technology infrastructure of Oolong, to automatically pre-qualify leads, match buyers and sellers using sophisticated machine learning algorithms; and reach decision makers with marketing campaigns. Data model contains a graph of all manufacturing assets around the world, contact information of the decision makers and hierarchies of exhaustive list of models, parts, and they map to manufacturing processes. - Single handedly developed ETL pipeline for data transformation libraries for Spark and Salesforce, which were later contributed to open-source. They enabled spark developers to seamlessly interoperate with very large (10s of millions of rows) SalesForce objects as though they were regular Spark datasets, using SalesForce Bulk API. ### Architect @ Macys.com Jan 2013 – Jan 2016 | San Francisco Bay Area Provide technical leadership to group of modules developed under "Selection" domain that provide detailed, personalized information about the products that customers are interested in, driving them to the next phase of the purchase tunnel, playing a mission critical role for Macys.com’s generation of $4B annual revenue making it the 6th largest online retailer in the world. As the chief architect of the domain, some of the modules I am responsible are product recommendation engine, wish list, registry, product reviews,, social media integration, promotions, etc. as well as some of the highest visited pages such as the home page, the product details page etc. ### Lead Architect, Cloud PaaS @ Cisco Systems Jan 2011 – Jan 2013 | San Jose, CA Lead Architect for Cloud Service Platform that supports vertical applications with scalability requirements of up to 500K concurrent users Cisco Systems: As architect for the Cisco Virtual Service Exchange Cloud platform (PaaS), prototype new features and implement core components like Service Management, Service Registry, domain specific language compiler, as well as overall performance and high availability of the platform targeting 100K concurrent users / minute. Designed and implemented new domain specific language which unifies and simplifies existing APIs 5 times. Delivered a brand-new turn-key IDE complete with efficient Parsers, DSL Editors, Model2Model Transformers. ### Consulting Software Architect @ Brane Corporation Jan 2008 – Jan 2013 | San Francisco Bay Area Provide consulting services with demonstrated result oriented execution, whether working with small growth oriented startups or large corporations with Omni-channel presence. • Deliver turn-key enterprise applications as well as infrastructure software leveraging best of breed open-source technologies • Scala expert. Open source committer: Spark / Salesforce / Redshift Technology Management: - Partnering with business stake holders in formulating KPI driven technology roadmap - Applying lean startup principles to traditional corporate structures, empowering teams, idea labs, experimentation, KPI metrics driven feature development - Forming and leading distributed teams handpicking world class experts wherever they may be Highlights: Fiksu: Defined architectural roadmap for this Mobile Application Advertisement pioneering startup that helped it scale to 7B event processing per month, a 150x improvement. Defined realtime analytics and pricing infrastructure with no-sql. Google People Analytics (PAL): Developing the Google Business Intelligence Suite leveraging SOA, and Google Cloud and SDC architecture. Google HR: Define Dimensional Model. Automate the Extract Transform Load (ETL) cycle with 100x efficiency. Designed OLAP DSL on No-SQL EBay: As chief consulting architect responsible for EBay tooling infrastructure ### Architect @ TXE Systems Jan 2004 – Jan 2007 Developed MDA platform for model driven custom e-business applications, generating rich Web 2.0 and Eclipse RCP applications from declarative models.  TXE Platform leverages Eclipse and OSGI and is fully extensible. to the point that TXE itself is a product of the TXE Platform.  Context aware rule engine operates in either generated or interpreted mode. ### Data Warehousing & Tools Architect @ Oracle Corporation Jan 1998 – Jan 2003 Architected and lead the development of Oracle Warehouse Builder product from its inception into a world market leader in Data Warehousing.  Designed Common Warehouse Metadata (CWM) as a metadata management and interchange standardized by OMG  Designed and lead the migration of Oracle Applications and Oracle Express OLAP engine to use the CWM model ### Senior Software Engineer, Architect @ Prism Solutions Jan 1993 – Jan 1998 @ Prism Solutions, we delivered the first Data Warehousing product in the market which lead to successful public IPO. Lead design and architecture of next generation product suite working closely with stake-holders. ## Education ### BS in Computer Science Orta Doğu Teknik Üniversitesi / Middle East Technical University ## Contact & Social - LinkedIn: https://linkedin.com/in/kagan-t-05855a1 - Portfolio: http://www.brane.com --- Source: https://flows.cv/kagan JSON Resume: https://flows.cv/kagan/resume.json Last updated: 2026-04-11