Staff Backend Engineer: Digital Asset Custody Core

SoFi; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

SoFi is seeking a Staff Backend Engineer in San Francisco to design and build the core services powering our digital asset custody platform. You will work on secure transaction processing, wallet infrastructure, and integrations with custody providers and blockchain networks.

The role requires solving distributed systems challenges, building resilient APIs, and maintaining strict security and reliability across high-volume financial systems.

Qualifications

• 7+ years of backend software engineering experience.
• Distributed systems and cloud-native architectures.
• Experience building highly available production services.
• Strong understanding of REST APIs, asynchronous messaging, and event-driven systems.
• Experience with AWS or comparable cloud platforms.
• Experience with PostgreSQL, Redis, Kafka, or similar technologies.
• Strong understanding of CI/CD and modern software development practices.
• Excellent debugging and production incident response skills.

Responsibilities

• Design and build backend services for the digital asset custody platform.
• Develop secure transaction orchestration services for deposits, withdrawals, transfers, staking, and treasury operations.
• Build integrations with custody providers, blockchain infrastructure, and institutional settlement networks.
• Design APIs supporting retail and institutional crypto products.
• Develop services supporting wallet lifecycle management and blockchain interactions.
• Improve platform resiliency through redundancy, disaster recovery, observability, and automated recovery mechanisms.
• Optimize transaction throughput while maintaining strict security controls.
• Build scalable event-driven architectures supporting blockchain state changes and transaction processing.
• Partner closely with Security Engineering to implement cryptographic controls and authorization workflows.
• Collaborate with Product and Infrastructure teams to deliver new digital asset capabilities.

Skills

Backend engineering

Distributed systems

Cloud-native architectures

REST APIs

CI/CD

Incident response

Production services

Security-conscious design

Tools

AWS

PostgreSQL

Redis

Kafka

Job description

SoFi is seeking a Staff Backend Engineer in San Francisco to design and build the core services powering our digital asset custody platform. You will work on secure transaction processing, wallet infrastructure, and integrations with custody providers and blockchain networks.

The role requires solving distributed systems challenges, building resilient APIs, and maintaining strict security and reliability across high-volume financial systems.