Staff Engineer – Issuing

• At CloudWalk, we are building the core infrastructure behind our credit card operation — from authorization to clearing — handling real-world financial transactions at scale.
• This is not a typical backend role.
• You will work on systems where latency matters, correctness is critical, and failures have real impact.

The Role

• You will design and build the systems that authorize, process, and reconcile transactions in real time — ensuring performance, correctness, and security at every step.
• Our stack is heavily based on Rust, and we operate with full ownership of the issuing flow, including authorization, clearing, and ledgering.

What You'll Do

• Build and operate high-performance services in Rust
• Own critical paths in the issuing flow (authorization, clearing, ledger)
• Design systems for low latency, high reliability, and fault tolerance
• Debug complex production issues involving real money
• Ensure system integrity and correctness across all transaction flows
• Drive architecture decisions across teams

What We're Looking For

• Strong experience with distributed systems
• Solid understanding of concurrency, consistency, and fault tolerance
• Experience with high-reliability systems (fintech, infra, etc) is a plus
• Experience with Rust, or willingness to go deep into it
• Hands-on mindset and strong debugging skills

• AI as a Multiplier
• We use AI as part of how we build.

• Leverage AI tools to accelerate development and debugging
• Improve engineering workflows using automation and agents
• Increase team throughput without compromising quality

• Security by Design
• Security is not a separate layer — it is part of how we build systems.

• Design systems that are secure by default
• Handle sensitive financial data with strict guarantees
• Ensure integrity and correctness across all transaction flows
• Build systems where incorrect behavior is not acceptable

Why This Role

• move real money
• run under strict latency constraints
• must be correct all the time
• operate at real-world scale

This is engineering where things actually matter.