Blockchain Security • Sanctions • Legal Systems

Cross-border blockchain risk, turned into usable legal systems.

Turkiye-based attorney focused on sanctions, AML/CFT, blockchain security, and productized compliance workflows.

OFAC risk Smart contracts Compliance systems

Signal surface

Solidity, sanctions, legal review

Live
Risk OFAC screening + escalation
Build Solidity contracts & analysis
Output Workflow legal + technical
Review loop Productized compliance
Wallet / entity signal triage
Sanctions + legal context review
Decision handoff escalate

About Me

Osman Sönmez portrait

I help organizations navigate sanctions, AML/CFT, and emerging crypto regulation with practical systems. My work stays grounded in legal execution, cross-border coordination, and clear outcomes.

My background combines legal practice, research, and product building. I publish on sanctions and blockchain regulation while developing SanctionFlow and open-source screening tools that turn research into operational workflows.

I work as a licensed attorney in Turkiye and maintain a technical focus on Solidity smart contract auditing, supporting legal teams and product teams across Turkiye and international markets.

Areas of Expertise

Blockchain Security

Smart contract auditing, vulnerability assessment, and security architecture for DeFi protocols and blockchain applications.

Smart Contract Auditing

Comprehensive Solidity code review, gas optimization, and security best practices for Ethereum and EVM-compatible chains.

AML/CFT Compliance

Cryptocurrency anti-money laundering frameworks, FATF compliance, sanctions screening, and Travel Rule implementation.

Regulatory Technology

Building compliance tools for VASPs, sanctions screening APIs, and regulatory reporting solutions.

Legal Advisory

Cross-border cryptocurrency regulations, token classifications, DAO governance structures, and regulatory filings.

Research & Development

Open-source compliance tools, sanctions evasion detection algorithms, and blockchain analytics research.

Professional Experience

Sonmez Consulting

International

Principal Consultant

Providing strategic blockchain security consulting and cryptocurrency compliance advisory to international enterprises and financial institutions. Specializing in sanctions compliance, AML program development, and smart contract security assessments.

Sonmez Partners Law Firm

Turkiye

Founder & Managing Partner

Leading a boutique law firm specializing in fintech regulation, blockchain law, and corporate compliance. Advising cryptocurrency exchanges, DeFi protocols, and traditional financial institutions on regulatory compliance across multiple jurisdictions.

Selected context

Licensed by the Istanbul Bar Association in Turkiye; member of ABA and ACAMS where relevant; research and product work centered on sanctions, blockchain regulation, and compliance systems.

Selected Work

Three pillars define my public work: open-source compliance tooling, a live sanctions-intelligence product, and legal research on blockchain regulation.

Selected proof of work

Short case-study style notes on the kinds of work I publish, build, and advise on.

Open-source tooling

From policy language to repeatable checks.

Challenge: compliance teams need clearer, faster screening workflows.

Approach: build small, legible tools that turn sanctions logic into practical steps.

Output: open-source utilities and workflow ideas that can be reused or adapted.

SanctionFlow AI

A live product, not a static portfolio piece.

Challenge: review cycles move slowly when legal and technical signals live in separate places.

Approach: connect screening, risk scoring, and case review into one operating surface.

Output: a product narrative around live sanctions intelligence and structured handoff.

Research & publications

Analysis that outlives a single project.

Challenge: legal and policy questions around blockchain move faster than most formal references.

Approach: publish on sanctions, regulation, and enforcement-sensitive workflows.

Output: SSRN-backed writing that supports both client work and product thinking.

Context I work from

The site is intentionally compact: the goal is to show the legal, technical, and research context without turning it into a badge wall.

Jurisdiction

Turkiye-based practice

Licensed attorney in Turkiye, focused on cross-border digital asset risk.

Memberships

ABA • ACAMS

Membership context kept factual, without overstated credentials.

Research

SSRN publications

Writing on sanctions, blockchain regulation, and enforcement.

Build

SanctionFlow + OSS

Live product work and open-source tooling for operational workflows.

Selected topics

Blockchain security Sanctions OFAC AML/CFT Smart contracts Regulatory technology Legal research

Get in Touch

If you'd like to talk about sanctions compliance, legal research, product design, or a potential collaboration, start with one of the links below.