Senior Fullstack Engineer (Payments)

About the role

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Engineer (Payments) based in the United States.

Responsibilities

• Design, build, and operate scalable cloud-native fullstack applications supporting payments and purchasing flows with a strong focus on reliability and performance.
• Develop and maintain backend services and APIs using TypeScript, alongside modern frontend interfaces using React-based frameworks.
• Contribute to the architecture of distributed systems, including event-driven workflows, messaging systems, and consistency handling across services.
• Implement strong engineering practices around testing, observability, monitoring, and safe deployment strategies across the stack.
• Collaborate with product and engineering teams to deliver high-quality features while improving system stability and scalability.
• Identify performance bottlenecks and production issues, proactively driving improvements in system reliability and efficiency.
• Help define coding standards, engineering best practices, and scalable patterns used across multiple teams.

Requirements

• 5+ years of experience building and operating production-grade systems with user-facing APIs in high-scale environments.
• Strong fullstack expertise with TypeScript, including backend APIs (REST and/or GraphQL) and frontend development using React or similar frameworks.
• Deep understanding of distributed systems concepts such as event-driven architecture, message queues, eventual consistency, and concurrency challenges.
• Solid database experience with PostgreSQL or SQL Server, including schema design, indexing, migrations, and query optimization.
• Strong production mindset with experience in observability tools such as logging, metrics, tracing, and on-call support.
• Ability to communicate complex technical ideas clearly to both technical and non-technical stakeholders.
• Strong problem-solving skills with a bias toward ownership, action, and end-to-end delivery.

Benefits

• Competitive annual base salary ranging from $157,000 to $193,000
• Performance-based bonus eligibility
• Health, dental, and vision insurance for employees
• 401(k) retirement plan with company matching
• Flexible hybrid/remote-friendly work environment
• Generous paid time off, including company-paid holidays and front-loaded vacation days
• Family leave benefits and parental support
• Wellness, food, and grocery stipends
• Encouragement and bonus incentives for taking extended time off
• Collaborative engineering culture with strong communication practices and modern tooling