Hiring: Sr. Software Engineer I, Evaluation Services Company: NinjaTrader Location: Chicago, IL Job Posted Time: 2026-09-10 11:55:56 Employment Type: Remote Target Skills & Keywords : Capital Markets, Derivatives, JavaScript, Node.js, OAuth, OpenAPI, Postman, Python, REST, React, Swagger, TypeScript, WebSocket About the job Experience: •5+ years of software engineering experience, with deep hands-on expertise in API development, system integrations, and building or supporting partner-facing platforms Required Skills: •Serve as the senior technical point of contact for partners integrating with NinjaTrader APIs, providing expert guidance on authentication, endpoints, data models, and architectural best practices •Partner directly with external engineering teams to debug complex integration issues, conduct code reviews of their implementations, and accelerate time-to-production •Collaborate closely with Technical Account Managers to deliver a seamless partner experience, translating business requirements into technical solutions and providing real-time support during critical integration milestones •Diagnose and resolve complex API issues spanning WebSocket connections, REST endpoints, and real-time data feeds, often under time pressure with high-value partners •Own the quality standard for API support, establishing best practices for troubleshooting, documentation, and partner communication that the broader team can follow •Build and enhance internal tools, scripts, and diagnostic utilities that improve support efficiency and enable faster issue resolution •Drive continuous platform improvement by synthesizing partner feedback into actionable recommendations for Product and Engineering, influencing the API roadmap •Mentor junior team members on technical troubleshooting, partner communication, and maintaining composure in high-stakes situations Compensation: •$125,000 - $175,000 / year •Flexible work environment (work from home / hybrid options) •In addition, this position will also receive an annual target bonus of 12% Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!