Software Engineer

Summary

Topstep operates a trading platform that supports real-time trading, market data delivery, and brokerage integrations for active traders. The Mid-Level Software Engineer will build and ship production services and APIs using a modern .NET stack, own features through deployment, and contribute to trading platform systems. The role also involves collaborating across engineering and product, participating in on-call rotations, improving observability and reliability, and occasionally contributing to the React/TypeScript frontend.

Responsibilities

• Build and ship features for services and APIs that power core trading platform capabilities
• Own your features from design through deployment, with support from senior engineers
• Collaborate with product and design to translate requirements into maintainable technical solutions
• Learn and apply the architectural patterns and practices used across the engineering organization
• Write clean, well-tested code with a focus on reliability and performance
• Participate in on-call rotations and respond to incidents, with support from senior team members
• Help instrument your services with metrics and logging, and grow your skills in observability
• Occasionally work across the stack, contributing to the React/TypeScript frontend as features require
• Participate in code reviews, giving and receiving feedback to improve code quality
• Help maintain and improve existing systems through bug fixes, refactoring, and performance improvements
• Contribute to team documentation and knowledge sharing

Skills

• 3–4 years of software engineering experience building and shipping production features
• Solid proficiency in C# and .NET, with experience building production services
• Understanding of RESTful API design and service integration patterns
• Working knowledge of databases including SQL, basic schema design, and query fundamentals
• Experience writing automated tests and an understanding of testing best practices
• Ability to debug issues in production systems with guidance
• Strong problem-solving skills and drive to take on increasing scope and responsibility
• Good communication skills, with the ability to collaborate effectively across engineering and product
• Comfort working in agile environments with iterative development and changing requirements
• Experience with React, TypeScript, or other modern frontend frameworks
• Exposure to distributed systems, microservices, or event-driven architectures (Redis, NATS, Kafka, SignalR/WebSockets)
• Familiarity with PostgreSQL or SQL Server in production environments
• Understanding of observability tools (metrics, logging, tracing)
• Familiarity with container technologies (Docker) or cloud platforms (AWS)
• Prior on-call or incident-response experience
• Previous work in financial services, fintech, or other compliance-regulated environments
• Understanding of trading systems, market data, or brokerage operations

Qualifications

Must Haves

• 3–4 years of software engineering experience building and shipping production features
• Solid proficiency in C# and .NET, with experience building production services
• Understanding of RESTful API design and service integration patterns
• Working knowledge of databases including SQL, basic schema design, and query fundamentals
• Experience writing automated tests and an understanding of testing best practices
• Ability to debug issues in production systems with guidance
• Strong problem-solving skills and drive to take on increasing scope and responsibility
• Good communication skills, with the ability to collaborate effectively across engineering and product
• Comfort working in agile environments with iterative development and changing requirements

Nice to Haves

• Experience with React, TypeScript, or other modern frontend frameworks
• Exposure to distributed systems, microservices, or event-driven architectures (Redis, NATS, Kafka, SignalR/WebSockets)
• Familiarity with PostgreSQL or SQL Server in production environments
• Understanding of observability tools (metrics, logging, tracing)
• Familiarity with container technologies (Docker) or cloud platforms (AWS)
• Prior on-call or incident-response experience
• Previous work in financial services, fintech, or other compliance-regulated environments
• Understanding of trading systems, market data, or brokerage operations

Benefits

• Topstep is an engaging working environment which ranges from fully remote to hybrid.
• Seven Company-paid Holidays and generous Family Leave. Paid time off is front-loaded.
• Competitive 401(k) matching, health, dental, and vision insurance is offered for full time employees.
• Vacations are encouraged with a bonus for taking 5 consecutive days.
• Employee referrals are bonused.
• Topstep offers a food and groceries budget and contributes towards health and wellness.