Sergei Vorobev
Blockchain Architect & Protocol Engineer
14+ years of engineering. From embedded systems to L1 protocol design.
About
Blockchain Architect and Protocol Engineer with 14+ years of engineering background, specializing in Cosmos SDK, EVM, and cross-chain protocol design.
At HAQQ Network — an EVM-compatible L1 blockchain serving 6.9M+ on-chain users — I lead architecture and hands-on development of blockchain infrastructure across Cosmos and EVM ecosystems, combining system design ownership with direct Go and Solidity engineering.
My work spans the full protocol stack: Cosmos SDK module architecture, EVM precompiles, IBC and L1/L2 interoperability, token mechanics, on-chain identity frameworks, and blockchain-native AI integrations.
I bring a rare combination of deep distributed systems foundations — Master's in distributed computing, embedded and real-time systems background — with applied blockchain engineering at production scale. This allows me to approach protocol design not just as an architect, but as an engineer who understands the full execution stack.
14+
Years of engineering
6.9M+
On-chain users served
20+
Engineers led
Skills & Expertise
Protocol & Blockchain
Cosmos SDK modules, EVM precompiles, IBC & cross-chain interop, Solidity, OP Stack L2
Infrastructure & Systems
Go, Blockchain indexing, Oracle infra, CI/CD & observability, IPFS
Architecture & Design
Protocol specs, DeFi infrastructure, On-chain identity, ENS naming, AI agents
Foundations
Distributed systems (MSc), Embedded & RTOS, Real-time algorithms, HF data pipelines
Experience
Lead Blockchain Architect
HAQQ Network
Oct 2023 — Present · Dubai, UAE
EVM-compatible L1 on Cosmos SDK, 6.9M+ users. Led 20+ engineer team; shipped L2, precompiles, DeFi infra, identity systems.
Senior System Analyst
HAQQ Network
Nov 2022 — Oct 2023 · Dubai, UAE
Technical analysis, protocol specs, architecture documentation. Designed on-chain services across Cosmos SDK and EVM layers.
Systems Analyst / Solution Architect
Astrolabia
Apr 2022 — Nov 2022
Blockchain solutions for financial, insurance, healthcare. Japanese DEX ecosystem, NeoCryptoBank architecture.
Solution Architect
Damoov
Aug 2019 — Apr 2022
Android/iOS SDK architecture redesign. HF sensor data processing pipeline. Solana/Near blockchain reward integrations.
Embedded Systems Engineer
Raxel / Pampela
Jul 2012 — Aug 2019
Firmware, microcontrollers (AVR, Cortex M3/M0), RTOS. GNSS/CAN/GSM drivers, real-time algorithms. 4000+ devices produced.
Services
Blockchain Architecture & Protocol Design
End-to-end L1/L2 architecture design, from protocol specification through production deployment. Cosmos SDK module development, EVM execution layer integrations, and comprehensive protocol specifications backed by hands-on engineering experience.
Smart Contract Development
Production-grade Solidity contracts, custom EVM precompiles, and DeFi protocol development. Token mechanics design including issuance curves, stablecoin mechanisms, and Uniswap V3 pool lifecycle orchestration.
Cross-Chain Interoperability
IBC protocol integration, L1/L2 bridge architecture, and cross-chain token messaging. Design and implementation of communication primitives across Cosmos and EVM ecosystems, including ENS-compatible naming services via CCIP Read.
Technical Advisory & Consulting
Architecture reviews, protocol feasibility analysis, and technical due diligence for blockchain projects. Translating complex blockchain concepts for non-technical stakeholders and aligning solutions with business goals.
Infrastructure & DevOps
Blockchain node operations, indexing systems, and data pipelines across EVM and Cosmos. CI/CD automation, containerization, monitoring, logging, and production observability for blockchain infrastructure.
Let's Talk
Open to protocol engineering, smart contract development, blockchain architecture, and technical advisory engagements. Based in Dubai, UAE.