Principal Software Engineer (Java, Trading, FIX Protocol)
About The Position
The Team Fidelity Wealth’s Trade Management Engineering group is responsible for building world-class electronic trading solutions for Fidelity’s Capital Markets division. We are a high-performing, fast-paced technology team working with cutting-edge tools to deliver low-latency, high-throughput trading platforms. Our work spans across internal and external teams to build seamless, end-to-end electronic trading workflows. The Role We are seeking a highly experienced software engineer to lead the design and development of next-generation trading systems. This is a hands-on technical leadership role focused on building scalable, resilient, and high-performance trading infrastructure. You’ll collaborate across teams, mentor engineers, and drive innovation in a mission-critical environment. Architect and develop distributed, event-driven trading systems optimized for low latency and high throughput. Design and implement asynchronous processing frameworks and resilient messaging services. Collaborate with internal and external teams to deliver robust, end-to-end trading workflows. Lead performance tuning and optimization efforts across the platform. Mentor junior engineers and promote engineering best practices. Support production and non-production environments, including participation in a weekly on-call rotation.
Requirements
- Bachelor’s degree in Computer Science, Engineering, Information Technology, or equivalent.
- 10+ years of hands-on software design and development experience.
- Expertise in Java, C/C++, Python, and Linux.
- Deep experience with low latency messaging systems (e.g., 29West, Kafka).
- Strong background in building scalable, distributed, asynchronous, and event-driven applications.
- Advanced knowledge of low latency design patterns and performance optimization techniques.
- Experience with Capital Markets or Brokerage systems, especially order management.
- Solid understanding of the FIX protocol and FIX engines.
- Experience with CI/CD tools such as GitHub, Maven, Jenkins, Artifactory, and uDeploy.
- Hands-on experience deploying applications to AWS or other cloud platforms.
- Ability to understand complex, end-to-end systems and identify performance, scalability, or resilience bottlenecks.
- Strong analytical, communication, and organizational skills.
- Ability to manage multiple tasks and thrive in a collaborative team environment.
- Self-driven innovation and comfort working with leadership.
- Willingness to support production systems and participate in on-call rotations, including occasional weekend support.
Nice To Haves
- Proficiency in KDB+ or other time-series databases preferred
- Familiarity with AI developer assist tools (e.g. GitHub Copilot).
Responsibilities
- Architect and develop distributed, event-driven trading systems optimized for low latency and high throughput.
- Design and implement asynchronous processing frameworks and resilient messaging services.
- Collaborate with internal and external teams to deliver robust, end-to-end trading workflows.
- Lead performance tuning and optimization efforts across the platform.
- Mentor junior engineers and promote engineering best practices.
- Support production and non-production environments, including participation in a weekly on-call rotation.
Benefits
- We offer a wide range of benefits to meet your evolving needs and help you live your best life at work and at home.
- These benefits include comprehensive health care coverage and emotional well-being support, market-leading retirement, generous paid time off and parental leave, charitable giving employee match program, and educational assistance including student loan repayment, tuition reimbursement, and learning resources to develop your career.
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What This Job Offers
Job Type
Full-time
Career Level
Principal
Number of Employees
5,001-10,000 employees
