Square is looking to improve onboarding and engagement for its sellers by building and maintaining backend infrastructure that guides sellers from signup through their first payment and beyond. The goal is to increase new volume and seller success by simplifying, automating, and graduating seller experiences.
Requirements
- 8+ years of hands-on experience building Java/Kotlin microservices and APIs at meaningful scale (exceptional candidates with less experience but proven track record will be considered)
- Strong expertise in distributed systems design and implementation, including experience with event-driven architectures, data consistency, workflow orchestration, and automation platforms
- Strong API design skills for both internal and external consumption (REST/gRPC) with focus on reliability, extensibility, and supporting high-conversion user experiences
- Production ownership experience including incident response, SLO management, and operational excellence in high-traffic environments
- Technical leadership track record on multi-person, cross-team projects with demonstrated ability to mentor and guide other engineers
- Experience with modern cloud infrastructure (AWS, Kubernetes, containerization) and CI/CD practices
- Experience in growth engineering, conversion optimization, or funnel analysis
Responsibilities
- Drive onboarding and engagement improvements by designing and building highly available backend services that power critical seller experiences, including setup guides, onboarding checklists, automated workflows, and engagement features
- Build scalable distributed systems to handle millions of seller interactions across web, mobile, and international platforms while maintaining high reliability SLOs
- Lead cross-team technical initiatives spanning multiple engineering organizations, coordinating architecture decisions to support Growth Product's strategy of simplification and automation
- Own the full feature lifecycle from requirements analysis through API design, implementation, testing, deployment, monitoring, and production support with direct impact on growth metrics
- Mentor and guide engineers across the team and broader organization through code reviews, technical discussions, and knowledge sharing
- Act as a technical leader for ambiguous, complex projects that require coordinating multiple stakeholders and driving to resolution
- Enable extensibility and automation by building systems that outside engineers can easily understand, diagnose, and extend, supporting Growth Product's principles of rapid iteration and empowerment
Other
- Growth mindset and bias toward action with accountability for business outcomes and passion for moving fast while maintaining quality
- Excellent communication and collaboration skills with proven ability to influence teams beyond your immediate scope and work effectively in a fast-paced, outcome-driven environment
- Background with payments, onboarding/activation, user engagement, or fintech domains
- Experience building automation platforms or workflow orchestration systems
- Knowledge of A/B testing frameworks and experimentation platforms
