Sr. Software Engineer

Job Summary: Coinflow is a next-generation payments company headquartered in Chicago, pioneering the way money moves globally. The Senior Software Engineer will help build the core infrastructure for global payments, designing and implementing systems that process billions of dollars in transactions while collaborating closely with Product and other engineers. Responsibilities: • Build Core Payment Infrastructure Design and implement payment processing systems that handle high throughput and strict reliability requirements • Build APIs and SDKs that merchants use to integrate Coinflow into their platforms • Develop fraud detection and risk management features using real-time data analysis • Scale Our Platform Architect systems for performance, reliability, and observability at scale • Optimize database queries, caching strategies, and service communication patterns • Instrument services for monitoring, alerting, and debugging production issues • Ship Product Features Work end-to-end on features from technical design through deployment and iteration • Collaborate with Product and Design to translate requirements into elegant technical solutions • Balance speed of delivery with code quality and long-term maintainability • Improve How We Work Contribute to technical decisions around architecture, tooling, and best practices • Mentor other engineers through code review, pairing, and knowledge sharing • Help shape engineering culture as the team grows Qualifications: Required: • 5+ years of professional software engineering experience • Strong proficiency in TypeScript and Node.js; experience with React is a plus • Deep understanding of REST API design, relational and document databases (especially MongoDB), and distributed systems concepts • Experience building systems that handle high transaction volumes or strict correctness requirements • Comfortable with cloud infrastructure (AWS, GCP, or similar) and containerized deployments • Track record of shipping and maintaining production systems • Clear communicator who can discuss technical tradeoffs with engineers and non-engineers alike Preferred: • Experience in payments, fintech, or blockchain/crypto Company: Coinflow (fka Coinflow Labs) is the next-generation payment service provider revolutionizing global financial infrastructure with stablecoins, AI-driven fraud prevention, and instant settlement. Founded in 2022, the company is headquartered in Chicago, USA, with a team of 11-50 employees. The company is currently Early Stage.

Created: 2026-03-05