> Markdown version of [/jobs/ext/2209349-principal-software-engineer-trading-systems](https://www.wearedevelopers.com/jobs/ext/2209349-principal-software-engineer-trading-systems). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer, Trading Systems - **Company:** NINJATRADER, LLC - **Location:** Denver, CO, United States (Remote available) - **Experience:** Expert - **Salary:** $195,000.0 - $220,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Akka (Toolkit), Algorithmic Trading, Computer Networks, Continuous Integration, Software Debugging, Distributed Systems, Domain Name System (DNS), Github, IP Multicasting, Java Virtual Machine (JVM), Messaging Application Programming Interface, Network Protocols, OAuth, Performance Tuning, RabbitMQ, Redis, TCP/IP, Transmission Control Protocol (TCP), WebSocket, Multithreading, Concurrency, Software Troubleshooting, Containerization, Kubernetes, Information Technology, Low Latency, Apache Kafka, Functional Programming, Restful APIs, Grpc, Docker, Jenkins - **Published:** August 24, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pelehs18sp ## About the Role * Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience) * Extensive experience with high-performance, high-concurrency distributed trading systems * Proven expertise in JVM and performance tuning for high-performance environments * Experience supporting 24/7 production systems, ideally in trading environments * Deep knowledge of networking and protocols (HTTP/HTTPS, WebSockets, DNS, TCP/IP) * Experience with CI/CD tools (Jenkins, GitHub Actions) * Strong troubleshooting and debugging skills in high-pressure, real-time conditions * Excellent communication skills, capable of clearly articulating technical concepts to diverse stakeholders * Experience in functional programming languages within exchange/trading environments Bonus Points for: * Experience in low-latency, lock-free development and design * Strong experience with multithreading and concurrency in high-performance environments * Familiarity with binary or custom trading protocols * Strong knowledge of messaging frameworks (Kafka, RabbitMQ) and network protocols (UDP, TCP) * Hands-on experience implementing HTTP/WebSockets, REST APIs, OAuth, gRPC, and Redis APIs * Deep understanding of order handling/matching engines * Extensive experience with FIX or other market data/order-entry protocols * Practical hands-on experience with cloud-native technologies (Kubernetes and Docker) * Solid grasp of network communications, particularly IP multicast and TCP protocols used in market data feeds ## Description In this pivotal role on our Trading Services team, you will design, evolve, and optimize our core trading infrastructure. You will help scale and enhance our highly scalable, low-latency trading system, ensuring it meets the highest standards of performance, scalability, and reliability. Your work will directly impact our ability to support rapid growth in the retail futures trading space. In This Role You Will * Design, develop, and optimize our Scala-based trading services for high-volume, low-latency, 24x7 environments * Lead architectural strategy for future-state scalability and performance optimization * Mentor and guide junior engineers, promoting best practices and technical excellence * Collaborate cross-functionally with product, engineering, operations, and security teams to translate business requirements into robust and secure technical solutions * Optimize system performance, with focus on JVM tuning for Scala/Akka-based distributed system * Enhance monitoring and observability of services for real-time trade execution and operational transparency * Ensure compliance with security policies, regulatory standards, and industry best practices ## Related Videos - [Exploring the Power of gRPC-Gateway for Writing RESTful Services](https://www.wearedevelopers.com/videos/2072-exploring-the-power-of-grpc-gateway-for-writing-restful-services) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Microservices architecture as a key element in building trading systems for global finance markets](https://www.wearedevelopers.com/videos/1196-microservices-architecture-as-a-key-element-in-building-trading-systems-for-global-finance-markets) - [Boosting OpenSearch Performance: gRPC Search in Action](https://www.wearedevelopers.com/videos/1964-boosting-opensearch-performance-grpc-search-in-action) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries)