Principal Architect
KAST enables global spending of stablecoins through payment cards connected to traditional merchant networks and ATMs worldwide.
Maintainer signals as of 8/23/2026
Funding history
About KAST
KAST lets users spend stablecoins at merchants worldwide through payment cards connected to traditional networks. The platform supports multiple stablecoins within a custodian wallet system. Users can create digital cards for immediate use with mobile payment systems or request physical cards in various tiers. The service operates in multiple countries to facilitate cross-border digital asset spending.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
KAST is seeking a seasoned Principal Architect or Architecture Lead to serve as the primary technical authority for its transactional infrastructure. The role focuses on resilient microservices, payment processing, ledger systems, AWS cloud strategy, engineering standards, and security-by-design across a global fintech platform.
Requirements
- 10+ years of software engineering experience architecting large-scale payment platforms, ledger systems, or high-volume financial infrastructure.
- Deep expertise in microservices architecture, event-driven design, and distributed-systems trade-offs.
- Extensive experience designing and operating complex, high-traffic applications on AWS.
- Strong understanding of database patterns for financial data, transaction atomicity, and consistency models.
- Ability to influence technical direction across multiple teams and drive consensus on architectural trade-offs.
- Knowledge of security design within a regulated industry.
- Ability to balance immediate delivery needs with long-term architectural debt management.
Responsibilities
- Define and drive KAST’s long-term technical architecture.
- Lead distributed-systems design for fault tolerance, high availability, and scalability on AWS.
- Architect payment processing, ledger management, and financial data consistency systems.
- Define architecture principles, coding standards, and CI/CD and IaC deployment patterns.
- Lead AWS strategy while optimizing resource utilization, latency, and cost.
- Integrate security-by-design principles to meet PCI-DSS and SOC2 standards.
- Mentor senior engineers, lead architecture review boards, and guide major technical decisions.