Sr. Software Engineer II, Backend - NT Connect

Sr. Software Engineer II, Backend - NT Connect

What you'll do: NinjaTrader is seeking a Sr. Software Engineer II to join our NT Connect team—our API-based brokerage integration layer that powers connections with introducing brokers, fintech partners, and third-party platforms. In this pivotal role, you will help design, build, and evolve the backend services that underpin our partner integrations, brokerage APIs, and trading infrastructure. As a senior engineer on the team, your work will have a direct impact on partner success, trader outcomes, and revenue growth.

You will collaborate closely with Engineering, Product, QA, and cross-functional partners to deliver high-quality, scalable solutions for our broker partners. If you are passionate about distributed systems, real-time systems, API platforms, and the intersection of technology and financial markets, this is an outstanding opportunity to make a meaningful impact.

In this role you will: Design, develop, and maintain high-quality backend services that power the NT Connect brokerage API platform, ensuring scalability, reliability, and low-latency performance

Architect and implement RESTful and WebSocket APIs for partner integrations, including introducing brokers, fintech partners, and third-party trading platforms

Deploy and manage backend services in a Kubernetes/GCP environment, with a focus on availability, resilience, and observability

Implement robust monitoring, logging, and alerting solutions using industry-standard observability tooling (e.g., OpenTelemetry) to track and analyze system performance in real time

Collaborate with cross-functional teams and stakeholders to deliver end-to-end solutions that meet partner requirements, compliance standards, and business goals

Uphold and elevate engineering quality through code reviews, test coverage, CI/CD pipelines, release readiness, and incident response

Drive architectural decisions and technical roadmap planning, helping shape the evolution of the NT Connect platform

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 software development experience with distributed, backend systems, preferably in a high-performance or near real-time environment

Strong proficiency in one or more JVM-based languages (Scala, Java, or Kotlin); experience with reactive, message-driven frameworks is highly valued

Proven experience designing and building RESTful APIs and WebSocket services for external partners or B2B platforms

Experience with Kubernetes and cloud infrastructure (preferably GCP), with a focus on scalability and high availability

Deep understanding of modern distributed systems and ability to troubleshoot across the full stack (HTTP/HTTPS, WebSockets, TLS, TCP/IP, DNS)

Strong understanding of security best practices for exposed APIs and backend services: authentication, authorization, data isolation, encryption, and audit logging

Strong problem-solving skills with the ability to take full ownership of projects—from design through deployment, maintenance, and iteration

Excellent written and verbal communication skills; a collaborative team player who seeks feedback and drives continual improvement

Demonstrated use of AI coding agents and tools (e.g., GitHub Copilot, Cursor, Claude Code, or equivalent) to meaningfully improve personal and team productivity — treating AI-assisted development as a standard part of the modern engineering workflow

Bonus points for:

NinjaTrader is hiring for this role on CareerPlace.

Apply on the company website through NinjaTrader.

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