Senior Software Engineer (Billing and Payments) - Remote

Overview

Qdrant is a fully remote cutting-edge technology company specializing in open-source Vector Search designed for next-generation AI applications. Our platform enables high-performance vector similarity search, allowing businesses to unlock deep insights from unstructured data. By offering both open-source software and managed cloud solutions, we empower developers and enterprises to build scalable, AI-driven search and recommendation systems with ease. Our offering runs on major cloud providers in regions worldwide.

In Short

• Design, develop, and maintain billing and payment systems with high precision and attention to detail.
• Extend integrations with payment gateways (e.g., Stripe, Adyen, PayPal, Braintree) and marketplaces (e.g., Amazon, eBay, Shopify, App Stores).
• Design and implement user-friendly interfaces and interaction flows for billing and payment systems, ensuring accessibility for non-technical users such as accounting staff, customer support, end users or growth teams.
• Extend monitoring and alerting.
• Implement fraud detection mechanisms, chargeback handling.
• Collaborate closely with product managers, frontend engineers, and other backend engineers to create user-friendly and frictionless payment experiences.
• Ensure regulatory compliance (e.g., PCI-DSS, GDPR) in payment implementations.

Requirements

• Strong product mindset, with a deep understanding of how payments impact user experience and business success.
• Strong problem-solving and expression skills, to work in a remote environment.
• Proficiency in Python (FastAPI, Django, Flask, or similar).
• Strong understanding of relational databases, in particular PostgreSQL.
• Excellent sense for sustainable code.
• Understanding of transaction lifecycles, refunds, chargebacks, and fraud detection.
• Experience with at least two of: event sourcing, billing systems, payment processing systems, payment gateways, and marketplace integrations.
• Participation in collaborative, test-driven development.
• Capability to visualize data.
• Familiarity with Kubernetes, Docker, and cloud platforms (AWS, GCP, or Azure).
• Understanding of distributed systems and high-volume transaction processing.
• Ability to extend a reactive frontend stack is not frequently required, but should be possible.
• Experience with Go is a plus.

Nice-to-Have

• Exposure to machine learning for fraud detection.
• Experience in eCommerce, fintech, or large-scale SaaS platforms.
• Knowledge of real-time payments (RTP), open banking, or crypto payment solutions.
• Familiarity with vector databases or search engines (not required but a plus).

Benefits

• Competitive salary and benefits package.
• Fully remote work environment with flexible working hours.
• Opportunity to work on cutting-edge technology with a team of highly skilled engineers.
• Career growth and learning opportunities in a fast-growing industry.
• Collaborative and inclusive company culture.