{"id":"dmitry-zhelezov","title":"Dmitry Zhelezov","content":"**Dmitry Zhelezov** is the cofounder and CEO of [SQD](https://iq.wiki/wiki/sqd), a company that develops a decentralized data indexing platform for [Web3](https://iq.wiki/wiki/web3) applications. His work focuses on creating scalable solutions for [blockchain](https://iq.wiki/wiki/blockchain) data extraction and transformation, enabling developers to build more efficient [decentralized applications](https://iq.wiki/wiki/decentralized-application). [[4]](#cite-id-2HjdGrrMwF)\n\n## Overview\n\nDmitry Zhelezov has established himself as a notable figure in the [blockchain](https://iq.wiki/wiki/blockchain) technology space, particularly in the area of data indexing and processing. At [SQD](https://iq.wiki/wiki/sqd), he leads the development of technology that allows for high-performance data indexing while maintaining decentralization principles. The platform aims to replace traditional RPC (Remote Procedure Call) methods with more [permissionless](https://iq.wiki/wiki/permissionless) and trustless approaches to data access, enhancing [Web3](https://iq.wiki/wiki/web3) scalability. Under his leadership, SQD has developed innovative solutions including a decentralized data lake and the SQD Portal (formerly Gateway 2.0), which provides developers with tools for streaming, decoding, and aggregating blockchain data [[1]](#cite-id-IwZHnLu1MW).\n\n## Education\n\nZhelezov holds a PhD in Mathematics from Chalmers University of Technology, which he earned between 2011 and 2016. Prior to his doctoral studies, he obtained a Master of Science degree in Financial Mathematics from Halmstad University (2010-2011). He also holds both a Master's degree (2008-2011) and a Bachelor's degree (2004-2008) in Physics, Mathematics, and Computer Science from Saint Petersburg State University. [[2]](#cite-id-09k976NxMz) [[4]](#cite-id-2HjdGrrMwF)\n\n## Career\n\nZhelezov began his professional career in software development, working as a Java Developer at DataArt from 2007 to 2008. He then moved to GGA Software Services, where he served as a Senior Java Developer from 2008 to 2011. During this period, he gained experience in developing pharmaceutical and web applications, which served as a basis for later work with [blockchain](https://iq.wiki/wiki/blockchain) technology [[3]](#cite-id-HoEg2xFRXB).\n\nFollowing his early software development roles, Zhelezov transitioned to academic research. From 2011 to 2016, he worked as a PhD Researcher at Chalmers University of Technology. Later, from 2017 to 2019, he served as a Wallenberg Research Fellow at the Renyi Institute of Mathematics, where he conducted research in arithmetic combinatorics and graph theory [[3]](#cite-id-HoEg2xFRXB).\n\nZhelezov's entry into the [blockchain](https://iq.wiki/wiki/blockchain) space began with his role as a Full Stack Developer at Purple Scout in 2016-2017, followed by a brief stint as a Trading Analyst at KapitalTrading in 2016. His deeper involvement in [blockchain](https://iq.wiki/wiki/blockchain) technology started when he joined Helix Cognitive Computing GmbH as Chief Scientist from 2018 to 2020, where he led the development of a distributed messaging protocol [[3]](#cite-id-HoEg2xFRXB).\n\nFrom 2020 to 2021, Zhelezov worked as a Hydra Core Developer at Jsgenesis, focusing on a query [node](https://iq.wiki/wiki/node) framework for Substrate-based blockchains. This experience further solidified his expertise in [blockchain](https://iq.wiki/wiki/blockchain) data processing and indexing solutions [[2]](#cite-id-09k976NxMz).\n\n### SQD\n\nIn May 2021, Zhelezov co-founded [SQD](https://iq.wiki/wiki/sqd) (formerly known as Subsquid), where he initially held the position of Philosopher before becoming CEO. At SQD, he has been instrumental in developing the company's vision for a decentralized data indexing platform that addresses the scalability and efficiency challenges faced by [Web3](https://iq.wiki/wiki/web3) applications.\n\nUnder his leadership, [SQD](https://iq.wiki/wiki/sqd) has developed several key technologies, including:\n1. A decentralized data lake that serves as a repository for various types of [blockchain](https://iq.wiki/wiki/blockchain) data;\n2. SQD Light Clients, which aim to bring SQLite-like functionality to [Web3](https://iq.wiki/wiki/web3);\n3. SQD Portal, a comprehensive ecosystem of data tools built on top of the SQD Network's low-level interface.\n\nIn May 2024, [SQD](https://iq.wiki/wiki/sqd) launched its native token, which is designed to incentivize network participation and ensure the decentralization of the platform. [[1]](#cite-id-IwZHnLu1MW) [[4]](#cite-id-2HjdGrrMwF) [[3]](#cite-id-HoEg2xFRXB) [[5]](#cite-id-px4IiX8dnt)\n\nZhelezov is based in Landerneau, Bretagne, France. He co-founded [SQD](https://iq.wiki/wiki/sqd) with [Marcel Fohrmann](https://iq.wiki/wiki/marcel-fohrmann), who serves as a co-founder of the company. SQD is headquartered in Zug, Switzerland, and operates in the [blockchain](https://iq.wiki/wiki/blockchain) and [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) industries [[3]](#cite-id-HoEg2xFRXB).\n\n$$widget0 [YOUTUBE@VID](https://www.youtube.com/watch?v=7ARGjvBOi4w)$$\n\nIn addition to his technical work, Zhelezov has contributed to the [blockchain](https://iq.wiki/wiki/blockchain) community through writing and speaking engagements. His approach to blockchain data indexing emphasizes the importance of decentralization without sacrificing performance, focusing on creating solutions that align with [Web3](https://iq.wiki/wiki/web3) values while addressing practical challenges faced by developers. [[4]](#cite-id-2HjdGrrMwF) [[6]](#cite-id-SIGSdm8CQ5) [[7]](#cite-id-FmLfXC1jmo) [[8]](#cite-id-AYFOJIk1OC)\n\n## Interviews\n\n### BlockHash Podcast Interview #01\n\nOn November 29, 2024, Dmitry Zhelezov participated in an episode of the BlockHash Podcast, where he provided an overview of his professional background and discussed the development of [SQD](https://iq.wiki/wiki/sqd), a data infrastructure initiative within the [Web3](https://iq.wiki/wiki/web3) sector.\n\n$$widget0 [YOUTUBE@VID](https://www.youtube.com/watch?v=1z6pcw-9jWE)$$\n\nDuring the discussion, Zhelezov recounted his initial involvement with [cryptocurrencies](https://iq.wiki/wiki/cryptocurrency), which began in 2014 through the purchase of [Bitcoin](https://iq.wiki/wiki/bitcoin). This experience led to further exploration of [blockchain](https://iq.wiki/wiki/blockchain) technology and subsequently to the creation of [SQD](https://iq.wiki/wiki/sqd). He explained that the project was conceived to address perceived limitations in the Remote Procedure Call (RPC) model traditionally used for accessing blockchain data. The proposed alternative, as described by Zhelezov, involves a decentralized and scalable data layer designed to improve data access efficiency and reliability.\n\nZhelezov elaborated on the technical structure of [SQD](https://iq.wiki/wiki/sqd), outlining its emphasis on maintaining a balance between security, scalability, and decentralization. He introduced the SQD Software Development Kit (SDK), which provides tools intended to facilitate the development of applications that utilize on-chain data. Additionally, he mentioned that future updates planned for 2025 would focus on enabling real-time data access through a specialized portal.\n\nThroughout the interview, Zhelezov discussed various challenges and considerations relevant to the [blockchain](https://iq.wiki/wiki/blockchain) industry, including the necessity of technical proficiency, the increasing demand for streamlined data retrieval methods, and the complexities involved in aligning decentralization with performance requirements. He also referenced the importance of community involvement in the ongoing development of blockchain-based solutions.\n\nLooking forward, Zhelezov stated that [SQD](https://iq.wiki/wiki/sqd) plans to incorporate on-chain metadata capabilities, improve interoperability with external data systems, and explore a framework for token-based incentives. These developments, according to Zhelezov, are intended to support the project’s continued adaptation to the requirements of the [Web3](https://iq.wiki/wiki/web3) environment. 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