Senior Backend Engineer
KAST is a stablecoin-powered financial platform for storing, earning, moving, and spending digital dollars globally.
Funding history
Investors
About KAST
KAST provides stablecoin-enabled financial services including global USD and EUR accounts, transfers, yield products, and Visa payment cards accepted worldwide. It operates through licensed financial partners and is explicitly described by its official site as a financial technology company rather than a bank.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
Build and scale KAST's LATAM domestic payment rails by developing resilient backend services, integrating payment providers, and delivering reliable, auditable, secure, and observable transactional systems.
Requirements
- 5+ years of software engineering experience
- Backend engineering expertise with Go
- Experience building production-grade APIs and distributed systems
- Experience with event-driven or webhook-based third-party integrations
- Knowledge of reliability, security, and auditability for transactional systems
- Ability to reverse-engineer existing flows, define interfaces, and design for parallel delivery
- Cross-functional collaboration with product, compliance, operations, and external partners
- Cloud infrastructure and modern engineering workflows including AWS, containers, relational databases, and streaming or messaging
Responsibilities
- Design and build production-grade backend microservices and APIs in Go
- Implement provider fallback and routing logic with feature-flagged rollouts and safe rollbacks
- Support fraud detection and onboarding or KYC integrations
- Create functional specifications, technical design documents, and delivery estimates
- Design reliable, auditable, secure, and observable systems
- Review code, provide technical guidance, and mentor squad members
