Hiring: Principal Full Stack Engineer Company: Fidelity Investments Location: Merrimack, NH Job Posted Time: 2026-09-10 11:24:04 Employment Type: Full-time / Remote Target Skills & Keywords : Agile, JMeter, Java, Linux, Performance Testing, Python, Root Cause Analysis, Spring About the job Experience: •8 years of software design, development and performance testing experience •Minimum 8 years of software design, development and performance testing experience Required Skills: •Note: Fidelity will not provide immigration sponsorship for this position. Qualifications: •Have at least a bachelor’s degree in Computer Science, Engineering, Information Technology or equivalent, with a preference for advanced study •Deep hands-on experience in Software Performance Engineering •Demonstrated skill in Java, Spring, Python, Linux •Hands on experience using tools like jMeter to build performance harness for software benchmarking •Willingness to guide and mentor junior team members on solid engineering practices •Previous exposure to trading systems or brokerage technology •Knowledge of the FIX protocol is a plus •Demonstrated capacity to understand end to end platform and identify issues that can cause performance, scalability or resilience issues •Effective analytical, communication, and organizational skills and a willingness to run with multiple tasks at a given time •Thrive in a team environment, collaborating openly and actively contributing Compensation: •Flexible work environment (work from home / hybrid options) Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!