Senior Full Stack Engineer

The fintech platform helps businesses reduce payment processing costs. The role involves joining a small senior engineering team to build and scale the platform, covering full stack from payment data ingestion to customer-facing React applications.

• Build asynchronous pipelines for payment transactions and fee data
• Integrate with payment processors via APIs, webhooks, and SFTP
• Analyze Visa and Mastercard rules using AI-assisted document processing
• Detect interchange downgrades and improve transaction data quality
• Build and maintain Node.js backend services and React dashboard features
• Deploy and operate services on AWS using ECS and Docker
• Own features from implementation through testing and production delivery
• Work directly with the Product Owner on requirements and technical solutions

• 8+ years of professional software engineering experience
• Strong Node.js experience
• Experience with React
• Experience with payments, fintech, or financial integrations
• Solid understanding of asynchronous/event-driven systems and data processing
• Strong AWS, Docker, and PostgreSQL experience
• Experience with API and SFTP-based integrations
• Strong ownership and ability to work independently
• Proactive communication and willingness to ask questions and clarify assumptions
• Comfortable working in a small team and an evolving product
• Intermediate spoken English or higher