I design and ship
trustless financial systems

I'm Paul Arbic, a blockchain & solutions architect, full-stack engineer, consultant, and quantitative market analyst with an M.S. in Operations Research. I build systems that are secure by design, both operationally and technically, with game-theoretic incentives that keep every participant honest, from whiteboard math to audited, production-ready code.

Discuss your project View selected work
  • Ethereum
  • Polygon
  • Avalanche
  • Base
  • Kava
  • Multi-chain / Omni-chain
In crypto since
2017
Years shipping production applications
6+

01 / Services

Four disciplines, one accountable partner

Most teams hire an architect, a developer, a consultant, and an analyst separately, then spend months keeping them aligned. I do all four, so the design, the code, and the economics stay consistent with each other.

Blockchain & Solutions Architecture

Protocol designs that hold up under adversarial conditions, from contract topology and upgrade paths to oracle strategy and cross-chain messaging.

  • DeFi protocol design: CDPs, stablecoins, lending & credit
  • Omni-chain & multi-chain system architecture
  • Trust-minimized identity, KYC & ZK-proof integrations
  • Threat modeling, invariants & security reviews
  • Operational security: multisig, key management & access control

Full-Stack & Smart Contract Development

Production code end to end: defensively written Solidity with unit, fuzz, and invariant test suites, indexers and APIs, and fast, polished front-ends that wallets and users trust.

  • Solidity / EVM smart contracts (ERC-20, ERC-721, custom)
  • dApp front-ends in React, Next.js, Angular & vanilla JS
  • Node.js / Python back-ends, indexers & REST APIs
  • Automation with Chainlink Keepers, bots & scripts
  • Marketing & corporate websites, including multilingual sites

Technical Consulting & Leadership

Senior guidance when you need it: fractional CTO work, team direction, architecture reviews, and roadmaps that connect engineering effort to business outcomes.

  • Fractional CTO / technical co-founder engagements
  • Directing cross-functional development teams
  • Security due diligence & code / architecture audits
  • Build-vs-buy, chain selection & vendor strategy
  • AI-assisted engineering workflows for faster delivery

Market, Protocol & Quantitative Analysis

Analysis backed by a graduate degree in optimization and statistics. I model token economies, test protocol health under stress, and build systematic strategies.

  • Game-theoretic tokenomics & incentive-mechanism design
  • On-chain data analysis & protocol health reports
  • Algorithmic / quantitative trading strategies & bots
  • Stress testing, simulation & risk modeling
  • Research reports for funds, DAOs & founders

02 / Security & Incentives

Secure by design. Honest by incentive.

Every system I've worked on moves real money, so I treat security as a design constraint from day one rather than a phase at the end. I look at it from three angles: how the team operates, how the code behaves, and how rational participants will act once there's money on the line.

01

Operational Security

Most large exploits start with a compromised key, a rushed deployment, or a phished team member, not a clever bug. I secure the people and processes around the code.

  • Multisig, hardware-wallet & key-management strategy
  • Least-privilege roles, timelocks & admin minimization
  • Hardened deployment pipelines & secrets handling
  • Monitoring, alerting, pause/guardian mechanisms & incident playbooks
  • Team hygiene: phishing resistance, device & account hardening
02

Technical Security

Contracts and infrastructure built to hold up against attackers. I define threats and invariants first, write defensive code, then try to break it before anyone else does.

  • Threat modeling & protocol invariants before implementation
  • Defenses against reentrancy, oracle manipulation, flash-loan & MEV attacks
  • Unit, fuzz & invariant testing with Foundry
  • Access-control & upgrade-safety reviews
  • Audit preparation, auditor coordination & remediation
03

Game-Theoretic Incentives

Code can be correct and the protocol can still fail if the incentives are wrong. I design mechanisms where the honest strategy is also the most profitable one.

  • Mechanism design & equilibrium analysis
  • Liquidation, keeper & stability-pool incentive modeling
  • Sybil- and farm-resistant emissions, staking & referral systems
  • Attacker cost-vs-profit & economic-exploit simulation
  • Governance design resistant to bribery & vote capture
  • Assume adversariesEvery input, oracle, and counterparty may be hostile.
  • Minimize trustFewer keys, fewer admins, smaller blast radius.
  • Align incentivesMake honest behavior the dominant strategy.
  • Verify, then shipInvariants, tests, and review before mainnet.

03 / Market Analysis

Quantitative analysis, with the math shown

My training is in operations research: optimization, stochastic models, numerical analysis, and machine learning. I use it to answer the questions founders and funds care about before money is committed.

Game-theoretic tokenomics

Supply schedules, emissions, staking and referral mechanics modeled as strategic games, built for long-term sustainability rather than a short-lived TVL spike.

Protocol health & risk

Collateral ratios, liquidation cascades, peg stability, and liquidity depth, monitored from on-chain data and stress-tested in simulation.

Systematic trading

Arbitrage, market-monitoring, and execution bots that pair on-chain contracts with real-time Python analytics across DEXs.

Research for decision makers

Clear written reports for funds, DAOs, and founders that cover methodology, assumptions, findings, and recommended next steps.

Protocol Health Monitor

live model
System CR212%
Peg deviation0.08%
Liquidations0
liquidation threshold
Illustrative visualization of the kind of monitoring and reporting I deliver.

04 / Engagement

Ways to work together

Every project is scoped individually. Pick the model that fits your stage and I'll send a tailored proposal.

Hourly

Advisory Session

Focused expert time for architecture reviews, tokenomics feedback, code review, or a second opinion before a major decision.

  • Live calls or async written review
  • Actionable written summary
  • Ideal for early-stage validation
Request a quote

Monthly retainer

Fractional Partner

Ongoing capacity as your fractional CTO, lead architect, or in-house analyst, embedded with your team and roadmap.

  • Reserved monthly hours
  • Team leadership & roadmap ownership
  • Recurring market & protocol reports
Request a quote

05 / Selected Work

Protocols, products & research

A selection of systems I've led, architected, or built, from DeFi credit primitives to peer-reviewed research.

Product & Architecture Lead

Fuero.xyz: undercollateralized DeFi credit

Led product architecture and smart contract development for a DeFi primitive that offers uncollateralized and undercollateralized credit lines to prime borrowers. It uses real-world credit profiles, KYC verification, and privacy-preserving zero-knowledge proofs. I also designed user-owned on-chain identity profiles and seamless crypto payouts.

  • Solidity
  • ZK proofs
  • On-chain identity
  • Credit risk
fuero.xyz

Co-Founder & CTO

Bit Protocol: omni-chain CDP stablecoin

Co-founded and technically led a Liquity-derived collateralized debt position platform that mints the universal stablecoin $bitUSD against diverse assets across chains. It built strong TVL with zero liquidations and capital-efficient borrowing.

  • CDP
  • Omni-chain
  • Vaults
  • Liquidity engine
bitusd.finance

Core Smart Contract Engineer

Nuon.fi: inflation-protected flatcoin

Designed and developed core contracts for a yield-bearing "flatcoin" that tracks the Truflation index to preserve purchasing power. It earns yield automatically through Morpho, Curve, and other strategies, with multi-layered risk management and steward accountability built in.

  • Truflation oracle
  • Yield strategies
  • Risk management
nuon.fi

Solo engineer · 2022

Flash-loan arbitrage engine

A Solidity contract that borrows via flash loan and executes multi-hop arbitrage across Uniswap V2-style DEXs. It is paired with Python monitors that scan exchange rates across venues and currencies and trigger profitable trades in real time.

  • Flash loans
  • Python
  • MEV-aware execution

Client web engineering

Ascendra Therapeutics: corporate website

A fast, dependency-free marketing site for a clinical-stage biopharma company. It supports 9 languages with RTL, has a flash-free light/dark theme with View Transitions, uses accessible ARIA patterns, and includes a privacy-compliant contact pipeline.

  • i18n · 9 languages
  • Accessibility
  • Performance
ascendratherapeutics.com

Master's thesis · peer-reviewed

Electrical impedance tomography for cancer detection

Developed discrete and analytical methods in MATLAB, FreeFem++, and C++ to simulate and classify electrical readings for early detection of cancerous growth. Co-authored with Prof. Vladislav Bukshtynov and published in the International Journal of Computer Mathematics.

  • Inverse problems
  • Numerical PDEs
  • C++ / MATLAB
Read publication

Undergraduate research

Genetic algorithms for the traveling salesman problem

Built a full-stack web application that solves the TSP with genetic algorithms, ran large-scale simulations, and performed in-depth statistical analysis of solver performance.

  • Optimization
  • Simulation
  • Statistics

06 / Experience

Where I've built

  1. May 2024 – Jul 2026

    Blockchain Architect, Project Manager, Full-Stack Engineer & Data Analyst

    Protofire · Web3 development DAO

    • Directed cross-functional development teams building secure, trustless, and trust-minimized protocols.
    • Designed user incentive structures and analyzed macro-level system behavior to drive adoption and long-term sustainability.
    • Formulated scalable dApp architectures balancing security, performance, and regulatory alignment.
  2. Jan 2023 – Oct 2023

    Full-Stack, Web3 & Smart Contract Developer / Data Analyst

    Oiga Technologies · AI & tech development

    • Shipped production Solidity contracts and full-stack Web3 social platforms.
    • Designed incentive mechanisms and custom proprietary blockchain infrastructure.
    • Integrated data-analysis workflows to drive platform optimization and decisions.
  3. Sep 2022 – Dec 2022

    Full-Stack, Web3 & Smart Contract Developer

    WiseSoft · Ethereum DAO

    • Built and deployed web apps and Solidity contracts that expanded the WISE ecosystem.
    • Co-designed new protocols to increase functionality and user engagement.
  4. Mar 2022 – Sep 2022

    Full-Stack, Web3 & Smart Contract Developer

    Avalanche DeFi DAO

    • Delivered responsive dApps and Solidity contracts with seamless wallet integration.
    • Managed Moralis database infrastructure and external API integrations.
  5. Aug 2020 – Mar 2022

    Blockchain Architect / Consultant

    Independent

    • Advised protocols on tokenomics and design.
    • Assisted in the creation and deployment of ERC-20 tokens, DeFi protocols, and NFTs.
  6. Aug 2019 – May 2020

    Graduate Student Assistant, School of Science & Mathematics

    Florida Institute of Technology

    • Taught Pre-Calculus and Calculus. Tutored differential equations, PDEs, numerical analysis, linear algebra, stochastic models, and neural networks.

07 / Expertise

The toolkit

Blockchain & Web3

  • Solidity
  • EVM
  • Foundry
  • Ethers.js
  • Web3.js
  • ERC-20 / ERC-721
  • CDP & stablecoins
  • Lending & credit
  • Flash loans
  • Chainlink
  • Uniswap
  • Curve / Morpho
  • IPFS
  • ZK identity
  • Smart contract security
  • Fuzz & invariant testing

Software engineering

  • JavaScript / TypeScript
  • Python
  • Node.js
  • React
  • Next.js
  • Angular
  • Vite
  • Express
  • PHP
  • Java
  • C++
  • HTML / CSS
  • REST APIs
  • i18n & accessibility

Quant, data & AI

  • Nonlinear optimization
  • Operations research
  • Stochastic models
  • Machine learning
  • Neural networks
  • Genetic algorithms
  • Numerical analysis
  • Statistics
  • R
  • MATLAB
  • FreeFem++
  • On-chain analytics

Leadership, ops & tooling

  • Operational security
  • Multisig & key management
  • Threat modeling
  • Game theory
  • Mechanism design
  • Protocol architecture
  • Incentive design
  • Macro system analysis
  • Team direction
  • Project management
  • Linux
  • Apache
  • Git
  • Claude Code
  • Antigravity
  • OpenClaw
  • AI agent workflows

08 / Process

From first call to live in production

  1. 01

    Discover

    Goals, constraints, users, and market context, captured in a shared brief.

  2. 02

    Model

    Threat modeling plus game-theoretic and economic modeling of incentives, attack paths, and stress scenarios.

  3. 03

    Architect

    System design, specs, and a milestone plan you can hold me to.

  4. 04

    Build & verify

    Defensive, test-driven code with fuzz and invariant testing, security review, and audit preparation.

  5. 05

    Launch & measure

    Secure deployment behind multisigs and timelocks, live monitoring, and post-launch market analysis.

09 / Education

Grounded in mathematics

The math behind my architecture and analysis work comes from formal training in optimization, statistics, and numerical methods.

2018 – 2020

M.S. Operations Research

Florida Institute of Technology · GPA 4.0

Phi Kappa Phi. Thesis on electrical impedance tomography, published in a peer-reviewed journal.

2015 – 2019

B.S. Mathematical Sciences

Florida Institute of Technology

Lakshmikantham Math Scholarship recipient. Elected Student Government Senator who helped allocate a $250K activities budget.

10 / Contact

Let's build something that lasts

Tell me about your protocol, product, or market question. I usually reply within one business day.

Email me about your project