$ whoami

Nahem Seguias

AI & Blockchain Engineer

I solve problems and turn ideas into products by breaking them into small pieces that I can plan, build, test, and iterate on quickly. Whatever I ship, privacy and security come by default.

My experience spans 15+ years of engineering across AI, high-frequency trading, stock exchanges, telecom, and blockchains.

Whether working alone or in a team, I take ownership and don't wait to be asked. My old teammates can vouch for me, most of them are still friends.

Based in Madrid 🇪🇸 · Remote · English & Spanish

[email protected] github.com/nseguias linkedin.com/in/nseguias +34 665 780 125
15+Yrs Engineering
6+Yrs AI & Web3
100+Contracts
15+Apps Shipped

$ ls ~/tech-stack/

// languages

RustSolidity TypeScriptPythonBash

// ai & agents

ClaudeCodex OpenCodeLangChain MCPMulti-Agent Orchestration EvalsPrivate LLMs

// blockchain

EVM SolanaBitcoin DeFiDEXs VaultsTrading Bots Prediction MarketsRWAMEV

// tooling & hardware

Claude CodeDocker llama.cppNext.js AnchorFoundry GitEmbedded Hardware

$ cat services.txt

Agentic Engineering

I orchestrate multi-agent workflows (Claude Code, MCP) and review everything they produce. Robust beats clever.

AI Adoption Consulting

I help companies bring AI into their business: picking the right models, automating workflows, and training teams to use it well.

Private AI & Hardware

I run self-hosted LLMs so sensitive data stays private, on infrastructure you control — and I build hardware too, like the Faraday signer.

Smart Contracts

I design, build, and audit smart contracts across Cosmos, Ethereum, and Solana.

$ cat experience.log

AI Engineer & Blockchain Developer

2023 – Present
Freelance · Remote
  • I build products and solve problems using AI, reviewing every line before it ships.
  • I help companies adopt AI as a consultant: model selection, workflow automation, private LLM deployments, and team training.
  • I build across the DeFi stack: DAOs, vaults, streaming payments, and trading tooling on Cosmos (Rust/CosmWasm); RWA tokenization on Ethereum; event ticketing on Solana.
  • I audit smart contracts for teams across Cosmos, Ethereum, and Solana.
  • I build hardware too: I designed and built Faraday, an air-gapped Solana hardware signer with Rust firmware.

Smart Contracts Developer

2022 – 2023
Terraform Labs (Terra) · Remote
  • Built core protocol infrastructure in Rust & CosmWasm: an automated task scheduler for conditional execution and a prediction markets platform.
  • Owned the full lifecycle — design through deployment, working side by side with external security auditors.

System Engineer

2018 – 2022
SIX Swiss Stock Exchange · Zurich
  • Ran mission-critical infrastructure connecting banks, brokers, and exchanges at 99.99% uptime.
  • Led integration projects for trading systems.

NetOps Engineer

2015 – 2017
Jump Trading · London
  • Sub-microsecond network optimization for one of the world's largest HFT firms — billions in daily volume.
  • Built monitoring and automation for ultra-low-latency infrastructure.

Network Engineer

2017 – 2018
SICE (ACS Group) · Madrid
  • Architected network infrastructure for smart-city traffic systems.

Support Engineer

2013 – 2015
Cambridge Broadband Networks · Cambridge
  • Designed wireless backhaul solutions for telecom clients worldwide.

$ ls ~/projects/

StreamWeave

→

Real-time crypto streaming payments platform. Money that flows by the second instead of arriving by the month.

RustCosmWasm Streaming PaymentsNext.js

Faraday

→

Air-gapped hardware signer for Solana, built from ~$35 of off-the-shelf parts. No WiFi, no Bluetooth — transactions travel by QR code, and keys live in RAM only.

SolanaRust HardwareAir-Gapped

$ cat education.md

MSc AI for Financial Markets — Madrid Stock Exchange (BME)
2021
MSc Telecommunication Engineering — UCAB · honours, top 5%
2011
Server Administration — 360 GSP College, London · CCNA, MCSA, VMware
2014