Senior Software Engineer working at the intersection of systems-level Rust, blockchain engineering, and correctness-driven design.

I’ve spent 10+ years building and shipping production systems (microservices, integrations, CI/CD, reliability). My current focus is going deeper into the engineering that powers protocols and distributed systems: deterministic state modeling, concurrency, performance, and security tradeoffs.

• Systems-level Rust: ownership/lifetimes, memory model, concurrency
• Deterministic state machines and invariant enforcement
• Blockchain program architecture (Solana / EVM ecosystems)
• Performance-aware and safety-oriented engineering

A structured lab for exploring Rust as a systems language: mechanics, constraints, and experiments around correctness and concurrency.

https://github.com/arkgast/rustylab

Hands-on Anchor/Solana work with small programs and TypeScript tests, focusing on account constraints, safe arithmetic, and runtime realities.

https://github.com/arkgast/solana-course

Solidity + Foundry project exploring testing, deployment scripting, and secure smart contract patterns (CEI, validation, edge cases).

https://github.com/arkgast/foundry-lottery

• Make invalid states unrepresentable.
• Prefer compile-time guarantees over runtime checks when possible.
• Design explicit state transitions.
• Measure performance instead of assuming it.
• Treat documentation and tests as part of the system.

• Senior Software Engineer – Orangepill
• Software Engineer – Minka (Fintech)

• LinkedIn: https://www.linkedin.com/in/arkgast
• Email: arnoldgandarillas@gmail.com
• Location: Bolivia (remote-friendly)