[Remote] Senior Fullstack Engineer (Payments)

Note: The job is a remote job and is open to candidates in USA. Topstep is a company that focuses on enhancing the trader experience through innovative technology solutions. As a Senior Full Stack Engineer, you will be instrumental in building and evolving the architecture of their payments platform, ensuring it remains reliable and scalable while collaborating with product engineering teams to implement best practices.

Responsibilities

• Design, build, and operate cloud-native applications with an emphasis on reliability, safe deployments, and operational simplicity
• Embed automated testing, observability, and operational ownership into every stage of feature delivery
• Proactively identify and resolve issues, helping ensure our platform remains stable, performant, and ready to grow
• Collaborate with product engineering teams to champion event-driven best practices and deliver scalable, resilient solutions

Skills

• 5+ years of experience building and operating production-grade systems with user-facing APIs, with demonstrated impact on scalability and reliability
• A solid full-stack foundation, with strength in backend API design (TypeScript, GraphQL, REST) and modern frontend development (React, Next.js, TypeScript)
• Deep expertise in designing and operating scalable, distributed systems, including event-driven architectures, message queues, eventual consistency, and race condition handling, with a strong focus on performance, security, and maintainability
• Strong database fundamentals, including experience with PostgreSQL or SQL Server—schema design, migrations, indexing, and query optimization
• Excellent communication skills, with the ability to distill complex technical concepts for a range of audiences
• A production mindset and bias toward action—embracing metrics, logging, tracing, on-call participation, and end-to-end ownership of delivery

Benefits

• 7 Company-paid Holidays and generous Family Leave. Paid time off is front-loaded.
• Competitive 401(k) matching, health, dental, and vision insurance are offered for full-time employees.
• Vacations are encouraged with a bonus for taking 5 consecutive days.
• Topstep offers a food and groceries budget and contributes towards health and wellness.
• Bonus: This position is eligible for a performance-based bonus as provided by the plan terms and governing documents.

Company Overview