Block
Staff Software Engineer, Financial Platform - Issuing
Melbourne, Australia +1 · Remote · Staff · Full-time · Posted Sep 10, 2026
- Location
- Melbourne, Australia
US - CA - Bay Area - Remote - Experience
- 12 years with a Bachelor’s degree; or 8 years with a Master’s degree; or a PhD with 5 years of experience; or equivalent experience.
- Education
- Bachelor’s degree; or Master’s degree; or PhD; or equivalent experience.
About the job
Build and operate Block’s card-issuing platform, providing hands-on expertise in card-network integrations, certification, and production systems.
What you'll do
- Lead complex engineering work at card-network boundaries and collaborate across teams to shape platform solutions.
- Build production systems and certification/conformance tooling; analyze network messages and debug protocol-level issues.
- Drive network certification and mandatory release cycles, establish reusable engineering practices, mentor engineers, and support on-call operations.
What they ask for
- Deep, current expertise with at least one major card network and experience personally building, certifying, or operating a live direct network connection.
- Experience working directly with card networks to achieve concrete outcomes.
- Strong hands-on software engineering experience with reliable financial or payments systems at scale.
- Fluency with AI-assisted engineering workflows and willingness to participate in an on-call rotation.
Nice to have
- Visa expertise is preferred; working knowledge of Mastercard and American Express is also sought.
- Broad card-lifecycle understanding, including areas such as issuance, authorization, settlement, disputes, or fraud.
Tools
ISO 8583, Visa, Mastercard, American Express
AI focus
Apply AI-powered tools throughout the engineering lifecycle to improve velocity and quality, establish effective team practices, and evaluate AI-generated output.
Model-written summary · the original posting is authoritative