Sr. Software Engineer II Fullstack - NT Connect

What you'll do:

NinjaTrader is building NT Connect — our API-based brokerage integration layer that powers connections with introducing brokers fintech partners and third-party platforms. We're looking for a Sr. Fullstack Engineer to join the NT Connect team and help us design and build the services APIs and developer experience that make our platform a joy to integrate with. If you're passionate about crafting high-quality full-stack systems in a fintech environment where your work directly shapes partner outcomes and trading experiences this is your opportunity. You'll work across the entire stack — backend services API architecture web tooling and partner integration workflows — to create a scalable secure high-throughput platform. As a senior engineer on the NT Connect team your contributions will significantly impact the developer experience product roadmap and overall business outcomes.

In this role you will:

• Contribute to the development optimization and operational health of NT Connect's web-based platform building new features and maintaining existing ones across the full stack
• Design and implement scalable efficient backend services and APIs using Node.js and TypeScript deployed on cloud-based infrastructure (e.g. Google Cloud Platform)
• Collaborate closely with UX/UI designers to translate design prototypes into high-quality scalable frontend code that adheres to NinjaTrader's design system and branding guidelines
• Ensure seamless integration of frontend components with backend systems including account management tools partner onboarding flows and real-time market data feeds
• Develop and maintain real-time performance monitoring and logging solutions to ensure the platform remains responsive observable and production-ready
• Collaborate with other engineering teams QA and Product Managers to deliver end-to-end partner solutions that meet reliability compliance and usability standards
• Leverage AI coding agents (e.g. GitHub Copilot Cursor Claude Code) and modern developer tooling to accelerate delivery improve code quality and raise the team's engineering velocity

What you'll need:

• Bachelor's or Master's degree in Computer Science Software Engineering or a related field (or equivalent practical experience)
• 8+ years of professional software development experience with strong depth across both frontend and backend systems
• Strong backend engineering skills with Node.js and TypeScript including building production-grade APIs authentication flows and API versioning strategies
• Proven experience designing RESTful and WebSocket APIs for external partners or B2B platforms
• Strong frontend engineering skills with a modern framework (React preferred); ability to deliver complex data-driven UIs with high attention to design fidelity
• Hands-on experience with cloud-native environments: Docker Kubernetes and GCP
• Strong SQL and database knowledge including schema design query optimization and migrations
• Experience with performance optimization caching strategies and event-driven architectures
• Demonstrated use of AI coding agents (e.g. GitHub Copilot Cursor Claude Code) to meaningfully improve personal and team productivity — treating AI-assisted development as a standard part of the modern engineering workflow
• Strong written and verbal communication skills; comfortable working with partner-facing and cross-functional teams with the ability to take full ownership of projects from design through deployment maintenance and iteration

Bonus points for:

• Familiarity with OAuth2 JWT API key systems or signed request authentication patterns
• Experience with financial brokerage or trading systems
• Experience with message queues or streaming platforms (e.g. Pub/Sub Kafka)
• Experience building SDKs or developer toolchains for external integrators
• Familiarity with infrastructure-as-code tools such as Terraform
• Experience working in a regulated fintech trading or brokerage environment

Compensation:

The salary range for this role will be $140000.00 - $190000.00 USD. In addition this position will also receive an annual target bonus of 10%. Bonus pay at NinjaTrader is based on individual performance (50%) as well as company/team performance (50%). Salary and bonus earnings are only two components of the total compensation package offered by NinjaTrader. NinjaTrader offers a 401K plan through ADP under which the company will match up to 3.5% of employee contributions. Annual paid time off allowance accrues at a rate of 18 days per year (some positions may qualify for more) plus seven paid holidays.

Location:

This role is based in Chicago IL. We are not open to remote candidates for this role

Hybrid:

For Chicago-based employees we follow a hybrid work schedule: In-office Tuesday through Thursday with remote work on Mondays and Fridays. In addition to these weekly remote days we offer:

• 20 additional flex remote days annually
• 5 Company Wide Office-Optional weeks tied to major holidays

What We Do

More than 2 million futures traders trust NinjaTrader's award-winning software and brokerage services to help them trade smarter. Since 2003 we've been building better futures for all traders by making futures trading more accessible scalable and user-friendly. As a bold innovative thought leader in the trading space we build products and services that empower active futures traders to easily analyze and react to data from the world's leading financial markets. Veteran and new futures traders alike look to us for our always-on support daily free education and analysis access to developer apps and much more. We believe in the power of innovation to drive futures trading forward. Together we continue to redefine what's possible in trading advocate for our customers and provide the best tools support and experiences to the fast-growing retail futures trading community. Located in Chicago our entrepreneurial employee-centric culture is inspiring innovative and inviting. We're committed to diversity equity and inclusivity so our team members feel at ease to be themselves and empowered to deliver the work they do best.

Why Work With Us

Our team members are our #1 asset and the signature ingredient to our success. When you join NinjaTrader you become part of an innovative forward-looking community that encourages creativity collaboration and camaraderie to deliver the best futures trading experience possible to our more than 1.8 million users. See why better futures start here.

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