Alexander Papageorgiou
Head of Security Services at Omniscia- Claim this Profile
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Greek Native or bilingual proficiency
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English Full professional proficiency
Topline Score
Bio
Credentials
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ECPE
Michigan State UniversityMay, 2013- Sep, 2024
Experience
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Omniscia
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Belgium
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Blockchain Services
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1 - 100 Employee
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Head of Security Services
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May 2022 - Present
Omniscia is an existing and established security company providing blockchain-related cybersecurity services to a wide array of clients all across the DeFi spectrum ranging from DEXes, NFTs, cross-chain bridges and more. My role within the company is to manage a team of security engineers to produce audit reports for our clients, ensuring that a rigorous quality and security standard is applied to their codebases. Direct responsibilities include preforming a review of all preliminary and final audit reports produced by our team as well as performing security audits myself for our esteemed clients. Show less
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Self-Employed
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Real Estate
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1 - 100 Employee
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Blockchain Consultant
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Jan 2022 - May 2022
I provided consultation services to various DeFi projects with regards to how they should shape their development practices and bring their innovative visions to reality. Key responsibilities in this role were managing personalized client relations and ensuring a consistent throughput to the various concurrent projects that I engaged in. Notable responsibilities included rigorously optimizing complex code and ensuring that code performs up to its specification. In this period I also began contributing to the Ethereum ecosystem by devising my own EIPs, contributing to other EIP discussions, performing independent analysis of security incidents, and developing a personalized toolkit for working with blockchain projects. My intentions are to publish these tools of my toolkit under an open-source license as soon as they become production-ready. I have also contributed to open-source Solidity libraries in the optimization area via pull-requests showcasing the capability to optimize well-known implementations a step further via in-depth knowledge of how the EVM operates. Show less
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Ourovoros.io
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Strategic Management Services
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1 - 100 Employee
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Senior Software Engineer
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Jul 2021 - Jan 2022
At Ourovoros, our aim was to provide a novel combination of security, code optimality, and best-of-class software development to our clientele. During my period, I directly managed the overall development of two separate projects; a novel decentralized insurance protocol as well as infrastructure expansion of an existing DeFi project that desired to integrate a new DEX implementation based on the Thorchain notions. The most challenging aspect of these engagements was ensuring that the security guarantees of the systems remain unbroken under a variety of circumstances including flash-loans, transaction ordering attacks (i.e. sandwhich arbitrage), and code-related vulnerabilities such as mathematical truncations. Show less
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CertiK
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United States
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Computer and Network Security
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100 - 200 Employee
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Senior Security Engineer
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Apr 2020 - Jul 2021
My responsibilities at CertiK involved auditing the smart contract source code of high profile blockchain companies and enterprises from a security as well as efficiency perspective. Key responsibilities included delegating auditing work to an internal team of Solidity auditors, conducting quality control on all produced material for Solidity as well as conducting auditing work myself in Solidity and Golang for clients of various backgrounds with a focus on decentralized finance (DeFi). My responsibilities at CertiK involved auditing the smart contract source code of high profile blockchain companies and enterprises from a security as well as efficiency perspective. Key responsibilities included delegating auditing work to an internal team of Solidity auditors, conducting quality control on all produced material for Solidity as well as conducting auditing work myself in Solidity and Golang for clients of various backgrounds with a focus on decentralized finance (DeFi).
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Interfima
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Luxembourg
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Financial Services
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1 - 100 Employee
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Software Engineer
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Nov 2018 - Jun 2020
Within Interfima, I am in charge of developing software for their clients which wished to digitally transform their internal operations. Software developed primarily consists of PoCs and full solutions in the form of web, mobile and desktop applications. Clientele mainly consists of Fintech and Healthcare parties while internal tools were also developed when necessary for the company. Peer to peer protocols have also been utilized for streaming data securely in a local network between its peers. Show less
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INLECOM
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Belgium
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IT Services and IT Consulting
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1 - 100 Employee
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Blockchain Specialist
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Feb 2018 - Apr 2020
My primary responsibility is to bring blockchain consulting and development within the various European funded projects the company handles as well as lead any blockchain related initiatives in in-house development. Feb 2018 - Ongoing ~ Leading the blockchain integration & development on the CHARIOT (Cognitive Heterogeneous Architecture for Industrial IoT) Horizon 2020 project. The project requires a Public Key Infrastructure to be created within a blockchain instance that will facilitate the verification of sensors within an IoT network as well as ensure data transmitted between the various nodes of the IoT network (Gateways, sensors etc.) is integral by utilising cryptographic signature techniques. Dec 2018 - Ongoing ~ Leading the blockchain research & innovation aspect on the ICONET (New ICT infrastructure and reference architecture to support Operations in future PI Logistics NETworks) Horizon 2020 project. Within this project, the applicability of blockchain technology in the Physical Internet infrastructure will be investigated. Specifically, the physical flows of the PI network will be replicated within a blockchain context and certain commercial processess will be automatically triggered on the blockchain depending on where a PI packet is currently being transported. Additionally, the potential of integrating Ricardian contracts that are dynamically generated will be investigated, along with their automated enforcement via the rules set forth by the smart contracts depicting SLA guarantees. Show less
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Eriden LLC
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Technology, Information and Internet
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1 - 100 Employee
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DLT Technician
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Jul 2018 - Apr 2019
I have been assigned to the development team of financial services offered by a banking institution client of Eriden. Within this project, I integrate various distributed ledger technologies (DLT) into their payment infrastructure, supporting the provision and complete management of cryptocurrency accounts. Additionally, I develop software utilizing state-of-the-art cryptography to retain accounts secure via a complex multi-party protocol. I have been assigned to the development team of financial services offered by a banking institution client of Eriden. Within this project, I integrate various distributed ledger technologies (DLT) into their payment infrastructure, supporting the provision and complete management of cryptocurrency accounts. Additionally, I develop software utilizing state-of-the-art cryptography to retain accounts secure via a complex multi-party protocol.
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Frantic Web
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Greece
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Developer / Blockchain Specialist
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Jan 2018 - Dec 2018
Currently working as a third-party contractor for Frantic Web, a website development and blockchain oriented company based in Greece. In charge of blockchain related website implementations, smart contract development & blockchain integration on front-end & back-end as well as DApp creation & idea conception. Currently working as a third-party contractor for Frantic Web, a website development and blockchain oriented company based in Greece. In charge of blockchain related website implementations, smart contract development & blockchain integration on front-end & back-end as well as DApp creation & idea conception.
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Arctus X
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United Kingdom
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Financial Services
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Co-Founder and Software Lead
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Apr 2018 - Aug 2018
I conceived and carried out the software development of a blockchain idea revolving around cryptocurrency wallets. Specifically, I wrote a white-paper that detailed the operation of a multi-signature wallet over a distributed network of peers with an adaptation of Shamir's Secret Sharing Algorithm that allows the usage of pre-determined shares to compute new ones. Created Proof-of-Concept smart contracts in Solidity that would be able to support the aforementioned scheme and relay information to a backend service and subsequently a dashboard via the use of blockchain events logged by blockchain probes as digital notaries. Conceptualized the SeRP (Segmented encrypted Retrieval Protocol) for the multi-signature wallets which acts as a doomsday-scenario failsafe where the private key could be re-assembled even in the case of operational failure of the Arctus X wallet service. Coded a web interface via which one is able to generate fully deployable Solidity smart contract code for an ERC-223 & ERC-20 compliant token parameters such as decimals, total supply and abbreviation are fully configurable. While the company has since disbanded, certain pieces of software have been re-iterated & resold. Negotiations for a total buy-off of the software are also underway. Show less
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Multisignio
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Greece
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Software Development
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Co-Founder and Software Lead
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Jan 2018 - Apr 2018
Brainstormed & formulated a blockchain idea revolutionizing the cryptocurrency wallet industry. Wrote a white-paper in LaTeX detailing the application of a AI powered node blockchain network acting as a side-chain wallet provider for all current cryptocurrencies supporting seed-derived BIP44 wallet creation. Created Proof-of-Concept smart contracts that will facilitate the operation of the Multisignature Wallet network & relay the key holders' decisions to the various mainnets via the use of Events logged by blockchain probes. Concept & development of SeRP (Segmented encrypted Retrieval Protocol), which makes Multisignio's multisignature wallets powered by an actual ECA (Externally Controlled Account), meaning the funds will constantly be retrievable by the private key on each blockchain's perspective network. Contributed to the development of the Multisignio website via the use of a Javascript framework. Show less
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Team Leader & Blockchain Developer
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Nov 2017 - Jan 2018
Reformulated the idea presented at the crowdhackathon into a payment tokenizing system taking advantage of the Elliptic Curve Digital Signature Algorithm (ECDSA) used by several blockchains. Purposed a new payment gateway system via the use of a plugin that tokenizes payment requests off-line with ECDSA via a generated private key from the user's credit card along with a 4-digit pin code, rendering all forms of phising attacks completely useless & bringing blockchain-grade encryption security to the traditional banking system. The plugin, along with allowing users to tokenize their payment requests, enables merchants to allow one-click purchases with the use of the plugin's API & with data optionally retrieved from a blockchain database. Bootstrapped a Proof-of-Work website in HTML, CSS & Javascript that showcases the private key, public key & public address generation from a supplied credit card number & utilizes the underlying library's API to enable a one-click purchase. Show less
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Full-Stack Blockchain Developer
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Nov 2017 - Dec 2017
Created a combination of the ERC-20 & ERC-223 standards for the company's smart contract powered casino. Found an ERC-223 attack vector and reported it to the creator of the standard. Discussed with various blockchain developers on public channels regarding gas-stipends & gas-efficient code and helped other developers with Solidity snippets. Experimented with hybrid blockchain & off-chain solutions for a dividend function & created the first fully on-blockchain dividence function. Integrated blockchain interaction on the back-end (Node.JS, MongoDB & Express JS) & on the front-end (Angular.JS) with the use of various Ethereum libraries such as web3, EthereumJS Utils & more. Created a secure one-click sign in feature by taking advantage of public address retrieval from a Keccak-256 signed message. Show less
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Team Leader & Blockchain Developer
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Oct 2017 - Oct 2017
Presented & created wtihin 48-hours a private blockchain to facilitate & automate inter-bank transactions by keeping them on a public ledger powered by the banks participating in the network. The blockchain used utilized a Proof-of-Authority protocol akin to that of J. P. Morgan's Quorum blockchain. Coded smart contracts in Solidity that track the interbank transactions and emit events to blockchain probes as to what transactions have taken place. Guided team members as to the tasks that were required of them as well as provided the necessary resources for them to study. Handled web3 integration to the front-end developed by another team member. Successfully passed to the next phase of the competition, the be-finnovative business accelerator & won a sponsored Business-Erasmus scholarship. Show less
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Ether Battle
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United States
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Medical Practices
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Full-Stack Blockchain Developer
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Oct 2017 - Oct 2017
Kickstarted a personal project utilizing Ethereum's scripting language to work as the back-bone for a simplistic online vide-game. Coded a complex smart-contract handling the 3 main mechanisms of the game, a Random Attack, a Targeted Attack & a Revenge Attack. Experimented with TRNG on blockchain via the use of a TLS Notary & with fair RNG based on game-theory regarding miner manipulation of blockchain data on run-time. Created a WP website for the game & a fully functional DApp interface able to run even locally via the MetaMask plugin with support for all types of wallets partially implemented. The DApp interface was coded in pure HTML, CSS & Javascript without the use of any kind of framework. Studied in depth how to completely secure a contract against various attack vectors, created a variation of the ERC-20 standard resistant to the transferFrom() double-spend attack & created a custom comprehensible comment format for Solidity. Show less
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Education
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2016 - 2020
Athens University of Economics and Business
Informatics
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