Principal Full Stack Engineer

Fidelity

Fidelity

Software Engineering

Durham, NC, USA

Posted on May 7, 2026

Job Description:

Note: Fidelity will not provide immigration sponsorship for this position

Looking for an experienced .Net and Java tech stack capable Full Stack Engineer. Job role will include helping in Production Support, Platform Engineering for applications built in various tech stacks. Good interpersonal skills. Ability to switch context and multi-task, learn quickly with minimal support and guide other members of the team.

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A Principal Full Stack Engineer that thrives in an environment where we are using innovative technologies to provide first class digital experience for our clients and customers. You will be involved in building or enhancing existing capabilities that help millions of Fidelity’s customers prepare better for retirement while delivering industry best experiences.

The Team

As a member of the 401k or Defined Contribution (DC) Online Recordkeeping technology chapter within the Workplace Investing business unit of Fidelity, you will be responsible for design, development, testing, deployment and Production Support of scalable and innovative solutions that help Fidelity’s customers plan & invest for retirement, manage and transact from their DC retirement accounts. You will be part of an agile Platform engineering team working in a fast-paced environment, closely collaborating with product, architecture and other engineering teams.

Members of this team also regularly work to:

  • Provide Level 3 application support

  • Participate in weekly on call rotation

  • Troubleshoot issues and conduct root cause analysis

  • Work alongside other associates on the team to elevate technology and consistently apply best practices.

The Experience You Have

  • Bachelor’s or master’s degree in computer science or a related technology discipline

  • 10+ years of software development experience on business critical, enterprise-wide applications

  • Experience collaborating/working/leading a team of developers

  • Expertise in designing, developing and maintaining high-volume transactional systems

  • Expertise in building scalable, server-side enterprise applications, domain logic intensive RESTful APIs

  • Experience in developing cloud neutral applications in AWS/Azure

  • Ability to debug through legacy systems, C++ & COM, and capture current state to aid with modernization

  • Actively participates in and contributes to formal reviews of architecture, design, and code

  • Provide deployment support for software releases into production environments

  • Experience leading and mentoring junior software developers

  • Fosters teamwork and collaboration across global development teams, business and systems partners.

  • Experience building technology solutions in the financial services industry is preferred.

  • Experience with Agile and Scrum Methodologies is preferred.

  • Leverage available AI/Dev assist tools in speeding up delivery and contributions.

The Skills You Bring

  • Experience in working in medium to large sized projects.

  • RESTful API design and development using JAVA / Microsoft .NET Core frameworks (C#).

  • Experience in design patterns & principles such as OO, DD, SOA, Microservices etc.

  • CICD experience using Azure DevOps and Jenkins.

  • An understanding of Micro-services Architecture and domain driven design patterns

  • Developing and deploying 12-factor, containerized (Docker, Kubernetes) API’s to AWS/Azure

  • Collaboration with producers and consumer teams to implement end-to-end solutions in a customer obsessed

  • Experience developing software utilizing relational databases

  • Experience with Test automation for unit, functional and non-functional testing (SOATEST, SOASTA, Cucumber)

  • Ability to develop technical artifacts based on analysis of business and systems requirements

  • Aptitude to discover/document implementations from legacy systems, C++, Java. .NET, as part of re- platform.

  • Knowledge of the current technologies and evolving trends

  • Identify opportunities to leverage AI/Dev assist tools for faster delivery and reduce dependencies.

  • Detail oriented coupled with strong analytical and problem-solving skills

  • Possess strong organizational skills, effective written and verbal communication skills, ability to multi-task.

  • Strong Team player and collaborator

The Value You Deliver

Your primary focus will be to work/collaborate/lead a team of developers on an Agile/Scrum team that partners closely with a Business and Product. Aligned with business priorities, you will be focused on re-architecting a suite of DC domain specific web services spread across multiple technology stacks as RESTful APIs based on micro-services architecture and domain driven design for deployment to a cloud environment.

Certifications:

Category:

Information Technology

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.

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Benefits that balance life and work

From our fully paid parent leave to our on-site health and wellness centers, our benefits support the belief that more balance you have, the better you can achieve your goals.

Benefits

Company overview

Company overview

At Fidelity, we are passionate about making our financial expertise broadly accessible and effective in helping people live the lives they want. We are a privately held company that places a high degree of value in creating and nurturing a work environment that attracts the best talent and reflects our commitment to our associates. We are proud of our diverse and inclusive workplace where we respect and value our associates for their unique perspectives and experience.

Reasonable accommodations

Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process. To initiate a request for an accommodation contact the HR Accommodation Team by sending an email to accommodations@fmr.com, or by calling 800-835-5099, prompt 2, option 3.

Equal opportunity employer

Fidelity Investments is an equal opportunity employer. We believe that the most effective way to attract, develop, and retain a diverse workforce is to build an enduring culture of inclusion and belonging.

Applicant screening

At Fidelity, we value honesty, integrity, and the safety of our associates and customers within a heavily regulated industry. Certain roles may require candidates to go through a preliminary credit check during the screening process. Candidates who are presented with a Fidelity offer will need to go through a background investigation and may be asked to provide additional documentation as requested. This investigation includes but is not limited to a criminal, civil litigations and regulatory review, employment, education, and credit review (role dependent). These investigations will account for 7 years or more of history, depending on the role. Where permitted by federal or state law, Fidelity will also conduct a pre-employment drug screen, which will review for the following substances: Amphetamines, THC (marijuana), cocaine, opiates, phencyclidine.

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