Full-Stack Engineer (Backend Leaning) - Payments Engineering

Accountabilities

• Design, develop, and maintain reliable payment and billing systems that support customer transactions, pricing models, and revenue operations across self-service and enterprise offerings.
• Build and improve usage-tracking and metering systems to ensure accurate measurement of customer activity while minimizing performance overhead and latency.
• Lead and contribute to the migration and modernization of enterprise pricing and usage-processing infrastructure, including the development of stream-processing services for usage events.
• Improve payment experiences by simplifying customer upgrades and transactions, supporting payments through different legal entities, and integrating additional payment providers.
• Collaborate with Finance and Tax teams to meet compliance, auditing, reporting, and financial accuracy requirements.
• Partner with Product and Growth teams to implement pricing changes, support experimentation, and enable new commercial strategies.
• Investigate and resolve complex billing issues by analyzing customer journeys, application logs, system behavior, and code to identify root causes and implement lasting solutions.
• Design and implement secure, scalable APIs, backend services, data storage solutions, and supporting infrastructure.
• Plan and execute migrations and system changes carefully, ensuring backward compatibility, minimizing disruption, and protecting customers from billing errors or payment interruptions.
• Work cross-functionally with engineers, Sales teams, Forward Deployed Engineers (FDEs), Finance specialists, and other stakeholders to deliver robust payment solutions.
• Maintain high standards for testing, security, code quality, observability, and operational reliability across systems that process financial transactions.
• Take ownership of technical challenges from investigation and design through implementation, deployment, monitoring, and continuous improvement.

Requirements

• Strong Python expertise: Demonstrated proficiency in Python and the ability to build maintainable, reliable, and efficient software.
• Backend engineering experience: A strong background in backend development, including designing and operating production systems.
• Software and system design: Solid understanding of common software architecture and design patterns, APIs, cloud infrastructure, storage technologies, and data structures.
• Testing and security: Strong fundamentals in test design, automated testing, application security, and building dependable production systems.
• Production debugging: Ability to investigate complex technical issues, analyze logs and application behavior, identify root causes, and implement effective solutions.
• System adaptability: Ability to quickly understand a large existing codebase and navigate complex infrastructure, legacy components, and interconnected services.
• Financial accuracy and attention to detail: A careful, methodical approach to modifying live systems that handle payments, pricing, usage data, and revenue.
• Migration and reliability mindset: Ability to plan and execute system changes safely, manage technical risks, and minimize disruption to customers and business operations.
• Ownership and problem-solving: A proactive, independent approach to solving challenging engineering problems, making sound technical decisions, and delivering measurable results.
• Cross-functional collaboration: Strong communication skills and the ability to work effectively with engineering, product, growth, finance, tax, and commercial teams.
• Flexible qualifications: No formal degree, certification, or specific length of professional experience is required. Demonstrated ability to solve difficult technical problems through previous projects, open-source contributions, or GitHub work is valued.

Preferred Qualifications

• Experience integrating payment-processing providers or developing billing, subscription, and usage-based pricing systems.
• Familiarity with stream processing, event-driven architectures, or high-throughput event pipelines.
• Experience working with financial operations, tax requirements, compliance processes, or audit-related systems.
• Experience deploying and operating applications in Kubernetes environments.

Benefits

• Remote-first flexibility: Work remotely from Germany or other eligible locations across Europe, the United Kingdom, Ireland, and the United States, subject to hiring eligibility.
• International office access: The option to work from offices in Dublin, London, New York, San Francisco, or Warsaw.
• Professional development budget: Access to an annual discretionary stipend to support learning, training, and professional growth.
• Coworking allowance: Receive a monthly coworking stipend if you are not located near one of the main office hubs.
• Team connection and travel: An annual discretionary stipend to meet and spend time with colleagues in person.
• Annual company offsite: Participate in a company-wide gathering at a different destination each year.
• Innovative engineering culture: Work in an AI-first environment that emphasizes rapid experimentation, technical excellence, autonomy, and minimal bureaucracy.
• Career growth opportunities: Take on challenging projects and expand your impact beyond the immediate scope of your role.
• Meaningful technical ownership: Help shape critical payment infrastructure and solve complex problems with direct effects on customers and business performance.
• Collaborative international team: Work alongside talented engineers, researchers, and operators across multiple countries and disciplines.