💻 Software Engineer | Blockchain Security Researcher | Open-Source Contributor
Architecting and developing high-performance microservices using Java, Spring Boot, and RESTful APIs — focusing on scalability, clean architecture, and performance optimization. My work spans backend systems, frontend interfaces, smart contract development, and security analysis — with a focus on creating Web2/Web3 products that are both robust and user-friendly.
I actively contribute to open-source ecosystems, audit and secure Solidity-based protocols, and volunteer in initiatives that empower developers across Africa through mentorship, education, and community building.
| Domain | Expertise |
|---|---|
| 🧩 Software Engineering | Java, Spring Boot, Node.js, Express, REST APIs, Microservices |
| 🖥 Frontend Development | React, Next.js, TypeScript, TailwindCSS |
| 🔗 Blockchain Development | Solidity, Foundry, Hardhat, Lisk SDK, IPFS, Chainlink, Cairo |
| 🧪 Smart Contract Security | Static + Dynamic Analysis, Slither, Echidna, Manticore, MythX, Scribble |
| 🔬 Formal Verification & Testing | Property-based testing, invariant checks, fuzzing, symbolic execution |
| 🧰 DevOps & Tooling | GitHub Actions, Docker, CI/CD, Netlify, Render, Vercel |
| 💡 Open Source & Research | Contributor to Web3, security, and educational repositories |
| Project | Description | Stack |
|---|---|---|
| ScanPay | Web3 QR-based crypto payment dApp for merchants | Solidity, Foundry, Next.js, wagmi |
| HostX | Decentralized event planning & NFT ticketing platform | Solidity, Lisk SDK, IPFS, React |
| lenFi | Lending and borrowing protocol with on-chain yield optimization | Solidity, Hardhat |
| StreamWatch | Livestream-to-earn platform rewarding streamers with native tokens | Solidity, React |
| CrowdfundX | On-chain crowdfunding system with IPFS-backed metadata | Solidity, Foundry |
| InsureWell | Parametric insurance smart contract for decentralized coverage | Solidity |
| DecentraLogix | Decentralized logistics network linking travelers and carriers | Solidity, Node.js |
I participate in smart contract security contests and perform private audits to strengthen blockchain protocols.
My focus is on vulnerability discovery, threat modeling, and secure architectural design.
| Platform | Contest / Protocol | Findings | Rank / Team | Report |
|---|---|---|---|---|
| Cantina | Telcoin | 1 High | 3 Low | Report |
| Cantina | Citrea | 0 High | 3 Low | Report |
| Cantina | Clementine | 0 High | 2 Low | Report |
| Private Audits | Escrow, Insurance, DAO Systems | 10+ findings | Independent | Reports |
Code4rena Profile: Proper
Sherlock Profile: Proper
Cantina Profile: IchieWeb3
- 🧑🏫 Mentor, Women In Blochain Africa (WIBA) — Training new female smart contract developers accross Africa
- 💬 Speaker, Local Blockchain Developer Meetups — Topics: Security, Architecture, DevOps
- 🧱 Contributor, OnlyDust Open-source contributor for Solidity, Rust, Java, DevOps
- 💡 Advocate, Blockchain for Education — Empowering students to learn decentralized tech
| Repository | Type | Contribution |
|---|---|---|
| Akkuea | Smart contract | open-source technology, AI, and blockchain |
| StarkWager | Frontend | Added vulnerability pattern examples |
| Tutor-Pal | Frontend | Added IPFS, active contributor |
| AssetsUp | DevOps | CI/CD |
| OnChain Sage | Frontend | AI-driven, decentralized trading assistant that combines real-time social sentiment analysis with on-chain market data |
| ScanPay | dApp | Author |
| HostX | dApp | Author |
| Category | Count |
|---|---|
| 🧩 Projects Built | 15+ |
| 🧠 Smart Contracts Deployed | 50+ |
| 🛡️ High / Medium Vulnerabilities Found | 40+ |
| 🌍 Mentorships / Talks | 20+ |
| 💚 Open Source Contributions | 100+ commits |
| Platform | High | Medium | Low | Reports |
|---|---|---|---|---|
| Code4rena | 0 | 0 | 0 | View |
| Sherlock | 6 | 5 | 2 | View |
| CodeHawks | 4 | 3 | 2 | View |
| Cantina | 2 | 3 | – | View |
| Private Audits | 12 | 9 | 3 | View |
Always open to collaborations — whether it’s software engineering, security research, protocol design, or educational initiatives.
Let’s build something impactful together 🚀
- Email: properumunna@gmail.com
- Twitter: @Proper_Progress
- Telegram: @ProperDev
- LinkedIn: Proper Umunnakwe
- GitHub: ProperProgress
🧩 "Building secure systems isn’t about trust — it’s about verification."
— Proper-Progress Umunnakwe