Staff Engineer – Issuing
Job Description
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.
Requirements
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.
About CloudWalk
CloudWalk is a pioneering force in the blockchain industry, headquartered in Brazil and dedicated to revolutionizing the future of digital payments. We are building a robust and inclusive financial ecosystem powered by cutting-edge Web3 technologies, empowering businesses and individuals with secure, efficient, and transparent transaction solutions. Our flagship products leverage decentralized ledger technology to solve real-world payment friction, driving financial inclusion and innovation across Latin America and beyond. We are committed to shaping a more open and accessible global economy. At CloudWalk, our culture thrives on innovation, collaboration, and a relentless pursuit of excellence. We champion a flat organizational structure, encouraging every team member to contribute ideas and take ownership of their work. We believe in fostering an environment where bold ideas are celebrated, continuous learning is paramount, and challenges are met with creative, blockchain-native solutions. Our diverse team comprises passionate engineers, designers, and strategists united by a shared vision for a decentralized future. Join CloudWalk and become a key architect of the next generation of financial infrastructure. If you're eager to work at the forefront of Web3, contribute to impactful projects, and grow your career within a dynamic, fast-paced crypto-native environment, CloudWalk offers an unparalleled opportunity. We seek individuals who are not just looking for a job, but a mission to build a more equitable and efficient world through blockchain technology. Come innovate with us and leave your mark on the decentralized revolution.
Ready to Apply?
To submit your application for this position, please visit CloudWalk's official website and follow their application process.