Senior Software Engineer I, Evaluation Services

NinjaTrader

Sr. Software Engineer managing API integrations and technical support for NinjaTrader's Evaluation Services team.

Posted 7/16/2026full-timeChicago • California, Colorado, District of Columbia, Florida, Illinois, Minnesota, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Wisconsin • 🇺🇸 United StatesSenior💰 $125,000 - $175,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates deep expertise in API development, system integrations, and partner-facing platforms, with a strong focus on troubleshooting and enhancing partner experiences. Capable of mentoring team members and driving continuous improvement through effective communication and collaboration.

Highest-signal resume keywords

API DevelopmentREST APIsWebSocketsTypeScript/JavaScriptTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

API DebuggingSystem IntegrationJSONOAuthScriptingTroubleshootingCode ReviewArchitectural Best PracticesLog AnalysisDistributed Systems

Soft Skills

CommunicationMentoringAdaptabilityProblem-SolvingAttention to Detail

Tools & Technologies

PostmanCurlBrowser Developer ToolsNetwork Analyzers

Industry Keywords

NinjaTraderTrading SystemsPartner IntegrationTechnical Account Management

Tech Stack

Tools & technologies

Distributed SystemsJavaScriptPythonTypeScript

About the role

Key responsibilities & impact

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
Develop deep expertise in NinjaTrader's evaluation platform, trading systems, and API architecture to provide authoritative technical leadership

Requirements

What you’ll need

5+ years of software engineering experience, with deep hands-on expertise in API development, system integrations, and building or supporting partner-facing platforms
Proven track record of working alongside Technical Account Managers and cross-functional teams to deliver successful partner outcomes in a fast-paced environment
Strong proficiency with REST APIs, WebSockets, JSON, OAuth, and API debugging tools (Postman, curl, browser developer tools, network analyzers)
Hands-on experience with TypeScript/JavaScript, Python, or similar languages for scripting, debugging, and building reference implementations
Demonstrated ability to work directly with partner engineering teams by reviewing code, pair debugging, and guiding architectural decisions
Excellent troubleshooting skills with the ability to analyze logs, trace API calls, and isolate issues across distributed systems under pressure
High quality standards with attention to detail in documentation, communication, and technical deliverables
Ability to think on your feet and adapt quickly when priorities shift or unexpected issues arise
Outstanding written and verbal communication skills with the ability to translate complex technical concepts for both technical and non-technical audiences
Self-starter who thrives in ambiguity and can manage multiple high-priority partner engagements simultaneously.

Benefits

Comp & perks

Generous PTO
7 Paid Holidays Annually + 5 Conditional Holidays Annually
1 Service Day Annually
401k with 3.5% Company Match
Paid Parental Bonding Leave
Health, Vision, Dental Coverage
Life and Disability Insurance Covered 100% by NinjaTrader