c# Pylyp Radionov
**Fullstack Engineer & Product Architect**
Remote (Europe Timezones) | [me@mr13.tech](mailto:me@mr13.tech)
[🌐 mr13.tech](https://mr13.tech) | [linkedin.com/in/mr13tech/](https://linkedin.com/in/mr13tech/) | [github.com/mr13tech](https://github.com/mr13tech)
+380932610010 (telegram, whatsapp, signal)
---
# PROFILE
Fullstack engineer with 7+ years building at the intersection of blockchain, big data, and distributed systems. Built the first Ethereum internal transaction indexer in the AML/compliance industry (2017) — a C++ solution that processed 4M blocks in 6 hours on 256MB RAM.
Currently focused on **AI-augmented engineering**, utilizing Spec-Driven Development to accelerate architecture and delivery. Comfortable across the full stack, from low-level protocol work and ZK circuits to high-conversion React frontends. I enjoy mentoring engineers and owning product outcomes, blending technical execution with strategic decision-making.
---
# SKILLS
**Advanced AI Workflows**
* **Spec-Driven Development (SDD):** Utilizing LLMs to architect rigorous technical specifications before implementation, ensuring edge-case coverage and reducing architectural debt.
* **Agentic Coding:** Expert in controlling AI coding agents (**Aider, Claude Code, Gemini CLI**) to automate complex refactoring, unit test generation, and documentation maintenance.
* **Rapid Prototyping:** Leveraging generative workflows to shorten the "Idea-to-Prototype" cycle, allowing for faster validation of product hypotheses.
**Technical Stack**
* **Languages:** Solidity, TypeScript, C++, Java, Python, Golang
* **Frontend:** React, Next.js, Tailwind, Shadcn UI, TanStack Query, Figma
* **Blockchain:** EVM internals, Hardhat, Foundry, Viem, Ethers.js, IPFS/Filecoin, Circom (ZK circuits)
* Other: Apache Spark, MapR, Hadoop, Neo4j, SQL/NoSQL, GCP, Docker, Linux
---
# EXPERIENCE
## SmartMerchant | Remote
**Product Engineer (Frontend Lead)** | Sep 2025 – Feb 2026
*Acting as the bridge between Engineering, Design, and Product for a B2B platform connecting shop owners with wholesalers.*
* **Legacy Migration & Modernization:** Orchestrated the strategic migration of the platform from a legacy PHP solution to a modern **Next.js** architecture. Re-engineered the frontend using **Tailwind**, **Shadcn UI**, and **TanStack Query**, resulting in measurable improvements in load times, responsiveness, and user feedback loops.
* **Product Ownership & UX Strategy:** Owned the V2 Product Vision and user flow architecture. Transformed high-level business requirements into seamless technical specifications. Led data-driven decision-making regarding user journeys, directly optimizing the UI for higher conversion rates and retention.
* **Technical Leadership:** Led frontend delivery for a 4-person agile squad. Established a component-driven development environment that reduced feedback times and allowed the team to iterate rapidly on new features.
---
## Copernic Space | Remote
**CTO** | Jan 2021 – Dec 2023
**Independent Contractor** | Jan 2024 – July 2025
*Web3 marketplace for tokenizing space industry assets — satellites, payloads, mission capacity.*
* Architected EVM smart contract protocol using Factory patterns and recursive ERC-1155 token relationships for representing hierarchical space assets.
* Designed gas-optimized contracts with comprehensive fuzz testing coverage.
* Built custom Subgraph indexer for real-time on-chain data and IPFS/Filecoin integration for decentralized metadata storage.
* Developed full-stack React/Next.js application with Sign-In with Ethereum (SIWE) and Firebase.
* Led technical decisions and mentored a team of 3-5 engineers across distributed timezones.
* Company raised $1M total funding.
---
## Zee Kaptcha | Remote
**Zero-Knowledge Protocol Engineer (Contract)** | Jan – Mar 2024
*Privacy-preserving CAPTCHA verification using zero-knowledge proofs.*
* Developed Circom circuits for on-chain CAPTCHA verification without exposing user data.
* Built proof generation and verification infrastructure from scratch — implemented custom Powers of Tau ceremony setup, proof generator, and verifier smart contract.
* Prepared open source release of the solution.
---
## Firelabs | Remote
**Tech Lead** | May – Aug 2021
*Mirror trading platform for fintech client.*
* Led team of 4 engineers delivering full-stack Web3 trading platform.
* Built Golang backend and React frontend supporting high-concurrency transactions.
* Structured Agile workflows and delivery milestones under tight deadlines.
---
## Coinfirm | Warsaw, Poland
**Software Engineer — Big Data & Blockchain Analytics** | Apr 2017 – Dec 2020
*Blockchain analytics platform for AML compliance.*
* **Performance Engineering:** Built the first Ethereum internal transaction indexer in the AML/compliance industry (2017). Wrote a C++ indexer processing the full chain (4M blocks) in 6 hours using only 256MB RAM on a standard laptop.
* **Data Pipeline Architecture:** Designed ETL pipelines mapping Ethereum data to SQL and Neo4j graph databases, enabling relationship analysis for compliance investigations.
* Extended indexing infrastructure to Bitcoin and UTXO chains (Litecoin, Dash).
* Engineered MapR and Apache Spark clusters for historical blockchain analysis and automated node operations to handle peak network activity.
---
# HACKATHONS & OPEN SOURCE
* **Decentralized Cleanup(open-source):** Contributing infrastructure to verify real-world environmental cleanups on-chain via impact NFTs.
* **12h.finance (ETHGlobal StarkHack 2024):** RWA collateral engine linking stock markets to crypto borrowing.
* **[unid.store](https://ethglobal.com/showcase/unid-store-2yukr) (ETHGlobal HackFS 2023):** **Winner: 🥇 IPFS — Best Use** — Decentralized file sharing on Filecoin.
* **0xKYC (ETHWarsaw 2022):** Co-founder/CTO — Decentralized identity; secured pre-seed funding and VC accelerator.
---
## **EDUCATION**
**B.Sc. Computer Science** — Polish-Japanese Academy of Information Technology, Warsaw, Poland
**M.A. International Economic Relations** — Odesa I.I. Mechnikov National University, Odesa, Ukraine