Staff Engineer (Rust, Fintech)

TL;DR

Staff Engineer (Rust/Fintech): Designing and building core financial infrastructure for credit card operations with an accent on authorization, clearing, and ledgering. Focus on developing low-latency, high-reliability distributed systems and ensuring transaction correctness at real-world scale.

Location: Remote (São Paulo, Brazil)

Company

hirify.global is building the core infrastructure for credit card operations, handling high-scale real-world financial transactions.

What you will do

• Build and operate high-performance services using Rust.
• Own critical paths in the issuing flow, including authorization, clearing, and ledgering.
• Design systems for low latency, high reliability, and fault tolerance.
• Debug complex production issues involving real-time financial transactions.
• Drive architectural decisions across engineering teams.
• Leverage AI tools and automation to accelerate development and improve workflows.

Requirements

• Strong experience with distributed systems.
• Solid understanding of concurrency, consistency, and fault tolerance.
• Experience with Rust or a strong willingness to go deep into the language.
• Background in high-reliability systems (e.g., fintech or infrastructure).
• Hands-on mindset with strong debugging skills.

Culture & Benefits

• Opportunity to move real money and operate under strict latency constraints.
• Engineering environment where correctness and system integrity are critical.
• AI-driven development culture using automation and agents to increase throughput.
• Security-first approach to building systems handling sensitive financial data.
• Work at a real-world scale with significant technical impact.