Senior Systems, Mobile & Web3 Engineer
Specializing in High-Performance Systems: Rust, Stellar Soroban, Solana, Native Android & React Native

I am a senior systems and software engineer with over a decade and a half of engineering experience (GitHub member since 2011). My background bridges low-level systems programming, smart contract protocol architecture, native mobile operating systems, and mission-critical cloud infrastructure.

Today, my primary technical focus centers on three disciplines:

• 🦀 Web3 Protocols & Smart Contracts: Production smart contract engineering in Rust on Stellar Soroban (state persistence, instance TTL extension, decentralized escrow primitives) and Solana (Anchor framework, PDA validation, in-memory transaction AST analysis).
• 📱 Mobile & Embedded Systems: Native Android development (Kotlin, Jetpack Compose, Android Auto / CarAppService) and cross-platform enterprise applications with React Native & TypeScript.
• ⚡ High-Throughput Full-Stack & Distributed Systems: Scalable web applications with React, Next.js, Node.js, and relational databases (PostgreSQL, Row Level Security, transactional advisory locks).

Languages:           Rust, TypeScript, JavaScript, Kotlin, SQL
Smart Contracts:     Soroban (Stellar SDK, RPC, TTL Rent Management), Solana (Anchor, Web3.js)
Mobile & Frontend:   React Native, Android (Jetpack Compose, Android Auto), React, Next.js, Tailwind CSS
Backend & Systems:   Node.js, Express, PostgreSQL (Advisory Locks, RLS), Prisma, Redis, REST / GraphQL
Testing & CI/CD:     Cargo Test, Vitest, Jest, GitHub Actions, Docker, ESLint

Soroban multi-party funding and pro-rata settlement primitive for Trustless Work escrows on Stellar.

• Tech: Rust, Soroban SDK, Stellar Testnet, GitHub Actions.
• Architecture: Implements decentralized, non-custodial milestone-based escrows with mathematical pro-rata distribution algorithms, invariant validation, and automated ledger TTL management.
• Impact: Engineered as a foundational financial primitive for the Stellar ecosystem and submitted to the Stellar Community Fund (SCF).
• 🔗 Repo: camesenin/kallpa-protocol

Autonomous pre-flight security agent & AST firewall for Solana Actions (Blinks) and autonomous AI trading agents.

• Tech: Rust, Solana Anchor, TypeScript, Next.js 14, Tailwind CSS, Vercel.
• Architecture: Deconstructs transaction Abstract Syntax Trees (AST) in memory to intercept malicious SetAuthority wallet drainers and unlimited token allowances before signing.
• Performance: Benchmarked at 0.028 – 0.038 ms in-memory evaluation latency with zero false positives.
• 🌐 Live Demo: solagent-sentinel.vercel.app | 🔗 Repo: camesenin/solagent-sentinel

Real-time Bluetooth OBD-II automotive telemetry & ECU diagnostic dashboard for Android Auto.

• Tech: Kotlin, Android Jetpack Compose, Android Auto Car App Library, Bluetooth Classic / BLE, Room SQLite, Coroutines.
• Architecture: Interfaces directly with motorcycle ECUs via ELM327 OBD-II protocols. Implements exponential moving average (EMA) noise filters and foreground services with SQLite trip logs.
• 🔗 Repo: camesenin/MotoECU

Rather than superficial commits, my open-source work focuses on solving complex architecture, concurrency, and security challenges:

• drydocs/meridian: Architected the complete Strategy Composition Guide and multi-asset apportionment algorithms for Meridian's Soroban yield aggregation SDK (PR #1208).
• Micopay/micopay-protocol: Engineered decentralized fallback routing for P2P agent exchange contracts, eliminating dead-end states when off-ramp liquidity is unavailable (PR #436).
• OFFER-HUB/offer-hub-monorepo: Enhanced documentation engine with line highlights, aria-live accessibility feedback, and native View Transitions typing (PR #1677).
• Expensify/App: Active contributor to Expensify's next-generation financial platform built on React Native, TypeScript, and Onyx state management. Focused on cross-platform UI synchronization and root-cause analysis.
• Talenttrust: Implemented cryptographic verification between REST API escrows and on-chain Soroban escrow contracts (PR #1607).

• 💼 Upwork: Carlos M. Profile (Top Rated)
• 🐙 GitHub: @camesenin
• 🌐 Live Demo: SolAgent Sentinel
• ✉️ Email: camesenin@gmail.com