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# Principal Software Engineer

- **Company:** FIDELITY LLC
- **Location:** Jersey City, NJ, United States (Remote available)
- **Experience:** Expert
- **Salary:** $107,000 - $216,000
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Algorithmic Trading, Acceptance Test-Driven Development, Continuous Delivery, Continuous Integration, Database Development, Software Design Patterns, Digital Assets, Distributed Systems, Iterative and Incremental Development, PostgreSQL, Query Optimization, Software Engineering, WebSocket, Database Performance, Information Technology, Low Latency, Software Version Control, Microservices
- **Published:** November 9, 2026
- **Apply:** https://www.careerbuilder.com/job-details/principal-software-engineer-jersey-city-nj--2616c23c-ea03-4cc8-a0f4-23822c6f0880

## About the Role

Software Engineering, Software Engineering, Cryptography Software, Time Management, Algorithms, Cryptography, Continuous Integration, Continuous Deployment/Delivery, Blueprints, Productivity Management, · Bachelor's degree in computer science or related field required

· At least 10 years of software engineering experience

· Background in designing and developing low latency systems.

· Extensive experience with modern Java using zero GC pattern.

· Knowledge of WebSocket and FIX protocols

· Proficient in ultra-low latency design patterns and optimizing systems.

· Build and optimize PostgreSQL databases, including schema design, SQL development, and query tuning.

· Experience with designing APIs, distributed systems, asynchronous workers and resilient messaging services.

· Troubleshoot and resolve application and database performance issues.

· An understanding of microservice architecture and cloud-based deployments

· Ability to build reliable software that can withstand unreliable environments

· Can provide leadership and mentorship across small, agile teams in a very collaborative environment where your ideas are welcome

· Solid analytical, communication, and organizational skills

· An interest in and experience with cryptocurrencies and a passion for keeping up to date in the space.

· Have the drive and ability to deliver software with a high degree of automation

· Proficient with version control systems and can handle development for multiple releases in parallel

· Have the spirit and willingness to contribute to org level innovation

· Have a learning mindset and is able to demonstrate versatility in addition to your specialization

· Should have the ability to work effectively with both partners and project team members

· Have Knowledge of Agile methodologies or iterative development processes

· Have Knowledge of Acceptance test-driven development a plus.

· Have Ability to take ownership

· Coach team members and take accountability for the deliverables

· Excellent collaboration and Interpersonal skills

· Great attitude, being a mentor, team player and effective contributor

· You have Focus on productivity

· Nice to have experience in Capital markets or Crypto Currency specifically with exposure to Trading, Algo Trading.

· Nice to have experience in building matching engine,OMS/EMS or exchange-connectivity platform.

· Nice to have experience using kernel bypass e.g., Solarflare OpenOnLoad.

· Nice to have experience with low latency messaging products, such as Aeron, Solace and 29West.

· Nice to have Knowledge of FIX protocols

## Description

Principal Software Engineer will be working in development and delivery of high quality, timely and maintainable software solutions in an agile environment which meet functional and non-functional business requirements. This role will involve partner and stakeholder engagement, design and release support.

 * Designing and implementing technology solutions for the Fidelity Digital Asset business

 * High Performance algorithms for trading / crypto trading

 * Working closely with our business partners to contribute to business-critical initiatives

 * Demonstrate software engineering excellence through continuous integration, continuous deployment,

 * Keeps current with IT blueprint, frameworks and technologies that would benefit us and improve our productivity; guides junior team members on technology

 * Collaborate with multiple stakeholders/large cross functional teams as part of work delivery

 * Follows practices and contribute towards innovative solutions to increase productivity