eftychis

Designed and implemented a system to allow multiple data owners to train or fine-tune models into an encrypted co-permissioned ML transformer model while keeping their data private and auditable (patent pending). Worked on ZK SNARK proofs for large data to proffer data quality prior to training and data audits.

Developed prototypes in Rust and Python fine-tuning LLMs to extract metrics and business insights from user data on the fly (including GUI/user interface with graphs). Implemented local inference via Llama2/3, BERT, and other LLM (in Rust/Candle running on Metal & CUDA, with high performance as a goal). Implemented local live video/audio transcription using Whisper.cpp model (Rust implementation). Talked with customers, investors, aggregated data. Negotiated Multiple Design Partnership Contracts.

Developed a multi-chain low latency (<200ms US) Byzantine Fault Tolerance prototype (2-phase commit) in Rust.

Built a Decentralized Computing Platform (based on Byzantine Fault Tolerance protocol) (Processed Billions of USD daily volume). Second founding person on the consensus team (co-designed and co-implemented the initial Consensus Protocol). Out of two individuals picked out of ~100 engineers to form the replica team – responsible for the whole system. Owned replica (overall system) architecture in 2020-21 - delivered 5x speedup. Coordinated and led multiple engineering teams across EU, US, and Asia on 3 projects. Single-handedly re-architected and refactored replica code to improve performance and guarantee security properties. Responsible for User Identity and flow architecture and security; launched in a matter of months in 2019. Designed and implemented validation pipeline; responsible for security against maliciously constructed user messages and user interaction. Designed and implemented the consensus layer memory management and persistence, ensuring consistency (both Rust + Haskell). Formalized and Verified consensus properties. Designed & Implemented Interactive Distributed Key Generation. Introduced code quality standards for Rust. Led and oversaw security code audits involving multiple cryptographers/engineers.

Cloud Orchestrator/precursor to the Kubernetes Platform. Designed and Implemented the main parts of the Distributed Key Management Mechanism, Secure Bootstrapping, and Secret Storage Integration (Go & C throughout). Implemented Consensus Protocol for Policy Distribution (Hybrid Gossip Protocol ascertaining Liveness constraint of Strong Eventual Consistency with minimal bandwidth cost). Designed and Implemented Authentication/Authorization mechanisms (LDAP-based). Responsible for OpenSSL/TLS, in-house security expert (Cryptography reviews, Unix Process Internals), Responsible/Oversaw Security Assessment and Penetration Testing, incl. NGINX custom patching.

Analysis, Modeling, and Designed Protocols for the Consensus Problem on Distributed Storage. Implemented Simulator and Optimizer (Synthesis under given Constraints). Worked on optimization and analysis around Distributed System, Liveness and Consistency Constraints.