> Markdown version of [/jobs/ext/2696234-principal-full-stack-engineer](https://www.wearedevelopers.com/jobs/ext/2696234-principal-full-stack-engineer). 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 Full Stack Engineer - **Company:** FIDELITY LLC - **Location:** Merrimack, NH, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Algorithmic Trading, Cloud Computing, Linux, Event-Driven Programming, Financial Information EXchange, Spring Framework, Apache JMeter, Python (Programming Language), Software Engineering, Trade Promotion Management, Performance Testing, Information Technology, Low Latency, Software Performance - **Published:** September 3, 2026 - **Apply:** https://www.themuse.com/jobs/fidelityinvestments/principal-full-stack-engineer-384708 ## About the Role * Have at least a bachelor's degree in Computer Science, Engineering, Information Technology or equivalent, with a preference for advanced study * Minimum 8 years of software design, development and performance testing experience * 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 The Skills You Bring * Ability 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 * Able to innovate independently and work with leadership * Familiarity with event driven and service-oriented processing is required * Demonstrated work experience with cloud technologies. Industry certifications are welcome, but hands on experience and expertise are better. Walking the walk is the most important thing * An eye for detail and a skill for root cause analysis in diagnosing and mitigating production problems as quickly as possible in a dynamic, high value environment ## Description We at Fidelity Trade Management Engineering (TME) group are responsible for building and maintaining Fidelity's brokerage platform order management and trade processing system. We are high functioning, fast paced technology group that work on cutting edge technologies to deliver low latency and high throughput trading solutions. We want to work with an engineer who is versatile, always eager to take on new problems and share solutions as we push the technology forward. Working independently as well as collaboratively, it is important for this person to have a positive approach to leadership, teamwork, and a drive to deliver groundbreaking solutions every day., * Work across organization and collaborate with teams to build highly scalable and resilient trading platform * Deliver high quality, timely, cost effective and maintainable software solutions in an agile environment to meet functional and non-functional business requirements * Actively contribute to the improvement of engineering practices such as code and design reviews, cloud strategy, and build and deployment pipelines * Work with squad lead and team tech lead on a frequent, recurring basis to design and implement novel solutions to complicated problems * Able to clearly present complex technical solutions, ideas, and plans to management, program teams, and less technical stakeholders as needed * Develop an understanding of the business domain you are working on and contribute to technology discussions with business partners and other external parties * Investigate creative practices and help decide how to apply them within the team. ## Related Videos - [How to Benchmark Your Apache Kafka](https://www.wearedevelopers.com/videos/76-how-to-benchmark-your-apache-kafka) - [Swapping Low Latency Data Storage Under High Load](https://www.wearedevelopers.com/videos/746-swapping-low-latency-data-storage-under-high-load) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [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) - [Java 21: The Revolution of Virtual Threads - A Deep Dive](https://www.wearedevelopers.com/videos/843-java-21-the-revolution-of-virtual-threads-a-deep-dive) - [Unleash the power of 5G in your code: transform your apps](https://www.wearedevelopers.com/videos/1567-unleash-the-power-of-5g-in-your-code-transform-your-apps) ## 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) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [How Much Does a Software Engineer Make? Realistic Software Engineering Salaries](https://www.wearedevelopers.com/magazine/425-how-much-does-a-software-engineer-make-realistic-software-engineering-salaries) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)