Principal Software Engineer (Python, KDB+, Electronic Trading, AWS)

Fidelity will not provide immigration sponsorship for this position.

Job Description:

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 electronic trading systems optimized for low latency and high throughput.
• Design and implement complex algorithmic trading systems for equities and options.
• Collaborate with internal and external teams to deliver robust and resilient systems.
• Lead performance tuning and optimization efforts across the platform.
• Lead and mentor engineers and promote engineering best practices.
• Support production and non-production environments, including off hours or weekend support as needed.

The Expertise You Have:

• Bachelor’s degree in Computer Science, Engineering, Information Technology, or equivalent.
• 10+ years of hands-on software design and development experience in the electronic trading domain.
• Experience in building algorithmic trading or smart order routing systems for equities and options
• Experience with equities and options market data
• Expertise in C/C++, Python, and Linux.
• Deep experience with low latency messaging systems (e.g., 29West/Ultra-Messaging, Kafka).
• Background in KDB+ or other time-series databases.
• Strong background in building scalable, distributed, asynchronous, and event-driven applications.
• Advanced knowledge of low latency design patterns and performance optimization techniques.
• Experience in Capital Markets or Brokerage systems, especially order management.
• Solid understanding of the FIX protocol and FIX engines.
• Experienced with using GenAI developer assist tools (e.g. GitHub Copilot).
• Experience with CI/CD tools such as GitHub, Maven, Jenkins, Artifactory, and uDeploy.
• Experience with deploying applications and services in AWS

The Skills You Bring:

• 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 syst

Fidelity’s Onsite Working Model
Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.

The base salary range for this position is $107,000-216,000 USD per year.  

Placement in the range will vary based on job responsibilities and scope, geographic location, candidate’s relevant experience, and other factors.

Base salary is only part of the total compensation package. Depending on the position and eligibility requirements, the offer package may also include bonus or other variable compensation.   

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.  Note, the application window closes when the position is filled or unposted.

Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.

Certifications:

Category:

Information Technology