Senior Software Engineer

About the role

Coinflow is building the next‑generation payment infrastructure that powers global commerce. As a Senior Software Engineer you will join a fast‑growing fintech team and help design, develop, and operate the core systems that process billions of dollars in transactions every day.

Key responsibilities

• Design and implement high‑throughput payment processing services with strict reliability and latency requirements.
• Build and maintain merchant‑facing APIs and SDKs that enable seamless integration with Coinflow’s platform.
• Develop fraud detection and risk‑management features using real‑time data analysis.
• Architect, scale, and monitor the platform for performance, observability, and fault tolerance.
• Collaborate with product, design, and other engineers to ship end‑to‑end features from concept to production.
• Contribute to technical decisions, tooling, and best‑practice guidelines while mentoring junior team members.

Required profile

• 5+ years of professional software engineering experience.
• Strong proficiency in TypeScript and Node.js; React experience is a plus.
• Deep understanding of REST API design, relational databases, and document databases (especially MongoDB).
• Solid grasp of distributed‑system concepts and experience building high‑transaction‑volume services.

Required skills

• TypeScript
• Node.js
• React (optional)
• REST API development
• SQL / relational databases
• MongoDB
• Distributed systems design