Senior Backend Engineer
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.
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
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