Coinflow Labs
Senior Software Engineer
$140K–$190K
Chicago · On-site · Senior · Full-time · Posted Jan 8, 2026
- Experience
- 5+ years of professional software engineering experience.
About the job
Build and scale payment infrastructure, merchant APIs, and real-time settlement systems that process high volumes of transactions.
What you'll do
- Design and implement reliable, high-throughput payment systems, APIs, and SDKs.
- Develop fraud and risk features; improve platform performance, observability, and production reliability.
- Ship features end to end, contribute to architecture and engineering practices, and mentor engineers.
What they ask for
- 5+ years of professional software engineering experience.
- Strong proficiency in TypeScript and Node.js.
- Understanding of REST API design, relational and document databases (especially MongoDB), and distributed systems.
- Experience with high-volume or correctness-critical systems, cloud infrastructure, containerized deployments, and production systems.
Nice to have
- Experience with React.
- Experience in payments, fintech, or blockchain/crypto.
Pay
$140,000 to $190,000 USD (base salary)
Tools
TypeScript, Node.js, React, REST API, MongoDB, AWS, GCP
AI focus
Develop fraud detection and risk management features using real-time data analysis.
Model-written summary · the original posting is authoritative