What you'll do:

In this pivotal role on our Trading Services team, you will architect, evolve, and optimize the distributed systems powering NinjaTrader’s real-time trading platform. As a Principal Software Engineer, you will lead the long-term technical direction of mission-critical trading infrastructure operating in high-volume, low-latency, globally distributed environments. You will play a key role in modernizing our trading architecture, driving scalability and resiliency initiatives, and shaping the future of our platform as we continue to grow in the retail futures trading space.

This role requires deep technical expertise across distributed systems, trading infrastructure, and real-time system design. You will serve as a technical leader on the team, influencing architecture, engineering standards, and platform strategy while mentoring engineers and partnering closely with product, operations, and executive stakeholders.

In this role you will:

• Design, develop, and optimize our Scala-based trading services for high-volume, low-latency, globally distributed 24x7 environments
• Optimize system performance, with focus on JVM tuning and distributed systems performance for Scala/Akka-based services
• Define and lead the long-term architectural strategy for NinjaTrader’s trading systems and distributed infrastructure
• Drive modernization initiatives focused on scalability, resiliency, fault tolerance, and operational excellence
• Lead service decomposition and platform decoupling efforts to enable polyglot development, isolated deployments, and improved system agility
• Serve as a technical leader and trusted advisor across engineering teams, driving best practices and engineering excellence
• Mentor and guide engineers through architecture reviews, technical design discussions, and operational leadership
• Collaborate cross-functionally with product, engineering, operations, and security teams to translate business requirements into robust and secure technical solutions
• Improve observability, monitoring, distributed tracing, and operational transparency across critical trading services
• Ensure compliance with security policies, regulatory standards, and industry best practices
• Lead technical decision-making during high-severity production incidents and real-time operational events
• Evaluate and introduce emerging technologies, frameworks, and architectural patterns to improve platform capabilities and engineering efficiency

What you'll need:

• Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience)
• Experience in Java/Kotlin/Scala/Rust/C++ or functional programming languages within exchange/trading environments
• Extensive experience designing and operating high-performance, high-concurrency distributed trading systems
• Deep expertise in low-latency system architecture, distributed systems design, and real-time event processing
• Proven experience leading technical strategy and architectural direction for mission-critical platforms
• Strong expertise in JVM internals, performance tuning, and optimization for high-performance environments
• Experience supporting highly available 24/7 production systems in trading or financial services environments
• Deep understanding of networking and protocols including HTTP/HTTPS, WebSockets, DNS, TCP/IP, and distributed communication patterns
• Proven ability to diagnose and resolve complex distributed systems, concurrency, and production performance issues
• Experience designing scalable, fault-tolerant microservices and event-driven architectures
• Excellent communication and leadership skills, with the ability to clearly articulate technical concepts to engineers, leadership, and cross-functional stakeholders
• Deep understanding of trading infrastructure, order lifecycle management, market connectivity, and real-time system reliability

Bonus points for:

• Background in capital markets, brokerage, or futures and derivatives technology
• Experience with real-time trading systems such as OMS, EMS, exchange connectivity, or market data infrastructure
• Experience leveraging AI/ML tools or technologies to enhance software development, system performance, or automation
• Experience in low-latency, lock-free development and design
• Strong experience with multithreading and concurrency in high-performance environments
• Deep understanding of order handling and matching engines
• Extensive experience with FIX or other market data/order-entry protocols
• Practical hands-on experience with cloud-native technologies including Kubernetes and Docker
• Experience designing highly available, resilient distributed systems in cloud-native environments

Compensation:

The salary range for this role will be $210,000.00 - $230,000.00 USD. In addition, this position will also receive an annual target bonus of 15%. 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 23 days per year plus seven paid holidays.

All offered compensation will be based on assessed experience and is subject to change at the offer stage.

Location:

This role is based in Chicago, IL. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin.

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 you'll do:

We are looking for a Staff Engineer to serve as the technical domain owner for the Transaction Ledger & Treasury system within our FCM platform, accountable for the financial correctness, reconciliation integrity, and system-of-record architecture of our brokerage systems. This role will lead the evolution of our architecture, modernizing and consolidating ledger, fund movement, and reconciliation logic into a coherent, cloud-native foundation. You will also drive the thoughtful use of AI-assisted development and operational tooling to increase engineering leverage, improve review quality, and accelerate modernization without compromising financial correctness or regulatory integrity. These are mission-critical systems where every state transition must be financially correct, auditable, and resilient under failure—because design flaws directly impact customer funds, regulatory standing, and firm capital.

As a Staff Engineer, your work will have a profound impact on our core FCM infrastructure, directly influencing our business’s bottom line. You will set the technical standard for the FCM engineering organization: defining architecture patterns, establishing engineering best practices, mentoring and elevating the engineers around you, and making high-stakes design decisions that determine whether our platform scales to meet the demands of a rapidly growing, globally distributed customer base. You will partner closely with engineering leadership, product management, compliance, and brokerage operations to ensure that every system you design is auditable, resilient, and built to serve both customers and regulators.

In this role you will:

• Define and own the foundational architecture of NinjaTrader’s cloud-native FCM platform on GCP/Kubernetes, including concurrency models, data consistency guarantees, service boundaries, and integration contracts across clearing, risk, and reporting systems
• Architect systems that process high-throughput trade flows with deterministic behavior under concurrency, partial failure, and asynchronous clearing acknowledgments across a 24/7 trading window
• Serve as the technical north star for the FCM engineering team by conducting deep, meaningful code reviews, pairing on complex problems, and leading architecture and design sessions that elevate the engineering bar
• Establish and enforce best practices across the FCM platform, including API design standards, testing strategies (unit, integration, contract, chaos), observability and SLI/SLO frameworks, CI/CD standards, and infrastructure-as-code patterns
• Define what excellence looks like for regulated financial systems and hold the team accountable to those standards
• Champion the responsible use of AI-assisted coding, testing, and code review workflows to increase velocity and reduce defects while preserving strict financial and audit constraints
• Design compliance-critical systems where regulatory requirements are treated as first-class architectural constraints, embedding audit trails, segregation controls, and compliance checkpoints directly into platform design
• Partner with engineering leadership, including the CTO and Director of Engineering, to shape broader technical strategy and govern system-of-record architecture, ledger data models, fund movement APIs, reconciliation workflows, and cross-service balance interactions
• Represent the FCM platform in cross-functional architecture forums and drive alignment across teams
• Take ownership of the most complex and high-impact technical challenges, transforming ambiguous problems into well-defined, executable plans

What you'll need:

• 8–12+ years of progressive software engineering experience, with demonstrated impact at the Staff level or equivalent scope of influence
• Deep expertise designing, building, and operating large-scale distributed systems in cloud environments (GCP strongly preferred; AWS or Azure acceptable)
• Hands-on experience with Kubernetes, event-driven architectures, and infrastructure-as-code tools such as Terraform
• Strong proficiency in modern backend languages such as Python, C++, Go, or similar, with the ability to make thoughtful technology decisions grounded in trade-offs
• Experience leveraging AI-assisted development tools, including code generation, static analysis, and automated test synthesis, to increase productivity and system quality in production environments
• Experience in financial services, capital markets, or brokerage technology, including trade lifecycle systems, clearing and settlement, and building systems where correctness and auditability are non-negotiable
• Proven track record as a technical authority and mentor who has raised the engineering bar of their teams
• Experience designing distributed systems where financial correctness, reconciliation, segregation of funds, and audit integrity are non-negotiable architectural constraints
• Excellent communication skills with the ability to clearly articulate complex technical concepts to engineers and non-technical stakeholders
• Demonstrated ownership of initiatives end-to-end, from problem framing and design through implementation, deployment, and operational maturity

Bonus Points for:

• Direct experience at a futures commission merchant (FCM), clearing firm, or broker-dealer operating under CFTC/NFA or SEC/FINRA regulatory frameworks
• Experience with CME clearing operations or self-clearing implementations
• Familiarity with treasury and money movement systems, including ACH, wire transfers, fund hold logic, and account segregation
• Track record of leading successful platform modernization or cloud migration programs in regulated financial environments
• Passion for futures, derivatives, and trading technologies and for democratizing access to these markets for retail traders

Compensation:

The salary range for this role will be $160,000.00 - $210,000.00 USD. In addition, this position will also receive an annual target bonus of 12%. 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 23 days per year (some positions may qualify for more) plus seven paid holidays.

Location:

This role is based in Chicago, IL. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin.

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 you'll do:

Mobile is central to how NinjaTrader reaches the next generation of retail traders. Our Flutter-based platform runs on iOS and Android, and the bar for quality is high — traders make real financial decisions on it. As a Sr. Software Engineer in Test on the Mobile team, you will own automation and quality for our mobile applications, working as a peer to Flutter engineers and product managers. You will shape how our apps are built to be testable, not just verify what ships.

In this role you will:

• Architect, build, and maintain a scalable end-to-end mobile automation framework for our Flutter-based iOS and Android applications
• Lead automation efforts across both platforms, with a focus on long-term framework stability and coverage
• Implement and enhance mobile automation using Appium, WebdriverIO, or similar automation frameworks
• Design and enforce a Screen/Page Object Model architecture and project structure that scales with the mobile team
• Write maintainable automation code in TypeScript/JavaScript, establishing standards others build on
• Partner with Flutter engineers on application architecture to identify testability gaps and make automation-friendly design decisions early — before they become late-stage problems
• Own CI/CD integration for mobile test pipelines: tagging strategies (e.g., smoke, regression), automated reporting, and pipeline reliability
• Identify, analyze, and eliminate test flakiness — treating automation reliability as a product quality concern
• Apply AI-assisted development tools — code generation, test generation, failure analysis — to improve coverage and productivity
• Drive improvement in mobile testing tooling and documentation
• Contribute to junior QA team members' growth through code reviews, pairing, and direct feedback
• Uphold NinjaTrader SDLC and information security standards

What you'll need:

• 7+ years of experience in QA engineering and test automation, with significant mobile automation experience
• Proven experience building and scaling mobile E2E automation frameworks for iOS and Android
• Strong hands-on experience with Appium, WebdriverIO, or comparable mobile automation tools
• Demonstrated experience working with mobile engineers on testability-by-design
• Deep understanding of Screen/Page Object Model or equivalent patterns for mobile test architecture
• Strong proficiency in TypeScript or JavaScript
• Experience with CI/CD tooling for mobile delivery, including GitHub Actions
• Experience designing test strategies that integrate into automated pipelines at scale
• Proven proficiency with AI-assisted engineering tools applied responsibly in a mobile QA context
• Track record of improving automation stability and reducing flakiness
• Strong communication and collaboration skills — comfortable as a peer to Flutter engineers and product managers

Bonus points for:

• Hands-on experience with Flutter-native testing tools (flutter_test, integration_test package)
• Familiarity with iOS and Android internals, simulators, and emulators
• Experience with cloud device labs (e.g., Sauce Labs, BrowserStack, or similar)
• API automation testing experience
• Accessibility testing awareness (WCAG or mobile platform standards)
• Financial trading systems or fintech experience

Compensation:

The salary range for this role will be $100,000.00 - $150,000.00 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 you'll do:

• Design, architect, and maintain a scalable, extensible Python-based test automation framework using PyTest  
• Define automation strategy and quality gates for back-office services and workflows  
• Write and maintain robust functional test suites for backend and service-layer applications  
• Evaluate existing test coverage, identify systemic gaps, and implement additional functional and integration tests 
• Develop integration tests across Python-based services, GCP Pub/Sub messaging systems, and Oracle databases  
• Design test data management strategies for complex distributed workflows  
• Implement mocks and stubs for middleware, databases, and third-party dependencies to enable isolated and deterministic testing  
• Partner with developers to build automation-friendly services and improve system observability and testability 
• Improve overall test reliability by identifying, debugging, and eliminating flaky tests  
• Lead code reviews for automation and proactively drive improvements in test coverage, maintainability, and engineering standards  
• Integrate automated test execution into CI/CD pipelines with single-click batch execution and automated reporting  
• Define and implement build certification and deployment validation processes across environments  
• Debug production issues using logs, database traces, and service telemetry to enhance test coverage and prevent regressions  
• Contribute to performance, resilience, and fault-tolerance testing strategies for distributed systems  
• Mentor QA engineers and developers on automation design principles, framework usage, and best practices  
• Enforce adherence to NinjaTrader SDLC and information security standards  
• Work ahead of feature delivery to ensure test architecture evolves alongside system complexity  

What you'll need: 

• 5+ years of experience in QA automation and software testing, with demonstrated senior-level ownership of automation initiatives
• Strong expertise in Python test automation frameworks such as PyTest (Robot Framework experience is a plus)  
• Proven experience designing automation frameworks from the ground up  
• Deep experience testing backend services, REST APIs, and distributed systems  
• Hands-on experience validating event-driven architectures using messaging platforms such as GCP Pub/Sub  
• Strong experience with relational databases (Oracle preferred), including data validation and complex query verification  
• Solid understanding of system testing methodologies, SDLC/STLC, and automation best practices  
• Experience designing and implementing integration testing strategies across asynchronous systems  
• Proficiency with Linux command-line tools and log analysis  
• Experience integrating automation into CI/CD tools such as Jenkins or GitHub Actions 
• Familiarity with infrastructure-as-code tools such as Terraform or Ansible  
• Experience testing cloud-native applications (GCP preferred)  
• Exposure to performance, load, or resilience testing in distributed systems 
• Financial trading systems experience is a plus  
• Excellent communication, collaboration, and analytical problem-solving skills  
• Demonstrated ability to mentor engineers and influence quality practices across teams 

Compensation:

The salary range for this role will be $100,000.00 - $150,000.00 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 you'll do:

We are seeking a Sr. Platform Engineer I to join our Platform Engineering team, focused on Developer Experience. In this role, you will design and build the tools, workflows, and golden paths that make engineers across the organization more productive. Your work will directly shape how teams build, test, ship, and operate software, removing friction, codifying best practices, and enabling self-service at scale. You will collaborate closely with product engineering, infrastructure engineering, and technical leadership to establish platform standards, create reusable service templates, and build internal tooling that accelerates delivery while maintaining quality and consistency across our web, mobile, desktop, and trading platforms.

In this role you will:

• Define and maintain golden paths for service creation, including service templates, starter kits, and scaffolding tools that let teams go from zero to production-ready with minimal friction
• Own developer onboarding workflows and maintain high-quality platform documentation
• Establish and evolve CI/CD pipeline standards across the organization
• Design release automation patterns, including rollout safety mechanisms such as canary deployments, progressive delivery, and automated rollbacks
• Build and maintain internal platform portals, reusable infrastructure modules, and paved-road workflows
• Enable product engineering teams to provision resources, configure environments, and ship features independently without reliance on other teams
• Champion platform adoption through clear documentation, enablement sessions, and a consultative approach
• Measure developer satisfaction and platform adoption metrics to continuously improve the experience
• Partner with product engineering, infrastructure, and operations teams to ensure platform tooling meets cross-platform needs
• Translate engineering pain points into scalable platform capabilities• Embed security and compliance requirements such as SOC2 and PCI-DSS into platform tooling and CI/CD pipelines

What you'll need:

• 8+ years in platform engineering, DevOps, or developer tooling roles with a strong focus on developer experience
• Deep experience building and maintaining CI/CD pipelines such as GitHub Actions, including release automation and deployment safety patterns
• Strong expertise with Kubernetes, Docker, and container orchestration in the context of self-service abstractions
• Proficiency in Python, Go, or Bash with experience building internal tools and automation
• Hands-on experience with Infrastructure as Code tools such as Terraform and Helm
• Experience with cloud platforms such as AWS, GCP, or Azure, including designing developer-facing abstractions
• Strong collaboration, communication, and documentation skills with a focus on internal developer experience

Bonus Points for:

• Experience building or contributing to internal developer portals such as Backstage
• Familiarity with platform engineering frameworks and a platform-as-a-product mindset
• Trading or financial services industry experience
• Contributions to open-source projects

Compensation:

The salary range for this role will be $165,000 - $180,000 USD. In addition, this position will also receive an annual target bonus of 12%. 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 allowanceaccrues 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. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin.

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 you'll do:

As VP of Product Engineering, you will own end-to-end engineering accountability for the platforms and systems that over 2.5 million traders depend on every day — including Desktop, Web, and Mobile trading applications, as well as the real-time backend infrastructure that powers them. Reporting directly to the CTO, you will lead a multi-director organization with a mandate to build a durable, high-performing engineering organization capable of predictable execution at scale while operating a 24x7 mission-critical trading platform. This role requires driving transformation while maintaining stability.

In this role you will:

• Lead a multi-director engineering organization spanning client platforms (Desktop, Web, Mobile) and real-time trading systems; set the tone for engineering culture, accountability, and craft
• Own performance management rigorously by establishing clear expectations, running structured calibrations, developing top performers, and addressing underperformance decisively
• Build leadership bench strength through strategic hiring and developing existing managers into senior leaders
• Partner with the CTO to translate business strategy into organizational design, headcount plans, and capability roadmaps
• Establish and enforce elevated engineering standards across code quality, testing rigor, deployment safety, incident response, and on-call excellence
• Drive measurable improvements in change failure rate, deployment frequency, and P1 incident trends to enable predictable execution
• Champion DORA metrics and SDLC best practices to ensure consistent quality across all teams
• Define and own the multi-year technical roadmap for client platforms and core trading systems including OMS, execution engine, market data, and exchange connectivity
• Lead platform modernization efforts, including retiring legacy infrastructure, evolving the Scala/Akka trading core, and expanding cloud-native capabilities on GCP while maintaining 99.95%+ uptime
• Enforce architectural guardrails and decision frameworks to ensure system coherence
• Achieve 80–90%+ roadmap execution through strong planning, prioritization, and delivery cadences
• Communicate engineering tradeoffs clearly to executive stakeholders and translate technical complexity into business terms
• Partner with Product, Design, Risk, and Compliance to align engineering investments with company priorities
• Champion AI-driven engineering initiatives including agentic development, AI-assisted code review, and debugging automation
• Measure and report on AI tooling impact across cycle time, defect rates, and developer experience

What you'll need:

• 15+ years of software engineering experience, including 5+ years leading organizations with multiple Directors or Sr. Engineering Managers
• Proven experience owning both client-facing platforms (web, mobile, or desktop) and backend distributed systems within the same role
• Demonstrated success improving engineering quality through reduced defect rates, improved deployment safety, and strong SDLC practices
• Experience in high-growth fintech, trading, payments, or similarly high-stakes environments where reliability has financial impact
• Deep expertise in distributed systems, event-driven architecture, low-latency systems, and cloud-native infrastructure (GCP or equivalent)
• Strong command of engineering delivery metrics such as DORA, change failure rates, and incident management
• Executive-level communication skills with the ability to translate technical complexity into business outcomes
• Bachelor’s or Master’s degree in Computer Science, Engineering, or equivalent experience

Bonus points for:

• Background in capital markets, brokerage, or futures and derivatives technology
• Experience with real-time trading systems such as OMS, EMS, exchange connectivity, or market data infrastructure
• Proficiency in C++, Java, Scala, Go, or similar programming languages
• Experience implementing AI-powered developer productivity tools at scale
• Experience navigating post-acquisition engineering integration

Compensation:

The salary range for this role will be $275,000.00 - $325,000.00 USD. In addition, this position will also receive an annual target bonus of 20%. 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 23 days per year (some positions may qualify for more) plus seven paid holidays.

Location:

This role is based in Chicago, IL. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin.

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 you'll do:

We are seeking a highly skilled and experienced Engineer specializing in Flutter to join our Mobile Engineering Team. As a Sr. Mobile Engineer II, you will lead mobile architecture, mentor engineers, and deliver scalable, high-performance applications that power a seamless cross-platform experience. You will influence technical direction across teams, set a high standard for engineering excellence, and drive end-to-end quality and reliability in our mobile products.

In this role you will:

• Own the life cycle of features through testing, debugging, documenting, releasing, and monitoring
• Take part in daily standups and regular team-wide meetings to discuss current and upcoming tasks
• Participate in the technical roadmap for mobile architecture, frameworks, and tooling
• Participate in design reviews, architecture discussions, and performance optimization efforts across iOS and Android
• Implement robust, maintainable Flutter solutions that follow best practices for state management, dependency injection, and reactive programming
• Collaborate with Product and Design teams to iteratively improve the user experience on mobile platforms
• Investigate issues, mitigate them, and recommend preventative measures
• Improve observability, monitoring, and crash analytics to ensure product stability and quality
• Help foster a culture of technical excellence, innovation, and collaboration

What you'll need:

• 6+ years of professional software engineering experience
• 2+ years of hands-on Flutter and Dart experience in production environments
• Understanding of mobile architecture, state management, and design patterns (BLoC, MVVM, Clean Architecture)
• Experience maintaining testing strategies for Flutter applications, spanning unit, widget, integration, and end-to-end levels
• Familiarity with building CI/CD automation for mobile delivery
• Understanding of RESTful APIs, WebSockets, and offline data handling
• Familiarity optimizing performance, reliability, and user experience across diverse devices
• Ability to perform in a team environment adopting agile principles
• Strong written and verbal communication skills
• Strong grasp of OOP design principles

Bonus Points for:

• Knowledge of native iOS (Swift) and Android (Kotlin/Java) integration
• Experience with fintech or trading platforms
• Contributions to open-source frameworks or SDKs

Compensation:

The salary range for this role will be $140,000.00 - $190,000.00 USD. In addition, this position will also receive an annual target bonus of 12%. 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. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin.

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