hero

Mass Fintech Careers

Discover the opportunities across the Mass Fintech Community
Mass Fintech Hub
Search 
jobs
Explore 
companies
Join talent network
Talent
My job alerts

Principal Software Engineer

Fidelity

Fidelity

Software Engineering
Boston, MA, USA
Posted on Jun 27, 2025
Apply now

Job Description:

Fidelity Labs is looking for a Principal level engineer to help build out our API Platform. This project is still in early stages and has room for exciting greenfield development!

The Value You Deliver

  • Attention to detail: An eye for detailed code review, writing clean code, and thoroughly reading documentation.

  • Leadership: A track record of mentoring junior engineers and explaining to them not only what standard methodologies are, but why they exist. As a startup, we can't anticipate everything that needs to happen every sprint, and we're looking for developers who can see gaps and move to fill them, while still collaborating with the rest of the team. We also work with a lot of other teams within Fidelity, so we also need people with experience with cross-team collaboration.

  • Shipping features and debugging production incidents in event-driven distributed systems.

  • Excellent technical interpersonal skills and a desire to make existing documentation better both for fellow developers and external customers. We're interested in people who can take dry, abstract concepts and refine them into something even a non-technical audience can understand.

  • Curiosity: Interest in the tools and abstractions used and how they work. Looking for someone who loves to have a detailed understanding of the technology they depend on and are interested in continually improving processes, whether that be questioning whether the default index type on the relational database should be a B-tree or sharing a useful new keyboard shortcut in the team's text editor.

  • TypeScript expertise: A strong instinct for writing accurate and specific type annotations, and knowledge of features such as the distinction between classes, types, and interfaces. Candidates with experience in other languages such as Go, Java, Ruby, and Python are also welcome to apply, as long as there is a proven track record to learn new languages.

Experience and Skills You Bring

  • Technical Expertise: Deep expertise in software architecture, cloud services, microservices, and event-driven paradigms.

  • Production Expertise: Significant experience shipping features, debugging production incidents, and optimizing performance in event-driven distributed systems.

  • Experience with using logging and observability platforms like Datadog and Amazon Cloudwatch.

  • Experience: Minimum of 7 years in software development, with a focus on platform engineering or API development. Experience with AWS cloud services such as ALB, Aurora, and S3, and relational databases such as PostgreSQL desired. Experience with identity management platforms like Auth0 is a bonus

​The Team

We are Fidelity Labs, Fidelity Investments’ in-house software incubator and digital studio. Founded in 2005, Fidelity Labs has played a meaningful role in driving growth and innovation for the firm. The Fidelity Labs organization has a portfolio of new businesses and is constantly prototyping concepts for Fidelity’s next new ventures!

Fidelity Labs is a dynamic workplace that combines the best parts of startup life—building from scratch, adapting quickly, and moon-shot ambition—with the scale and stability of an industry leader. Learn more at labs.fidelity.com.

Certifications:

Category:

Information Technology

Fidelity’s hybrid working model blends the best of both onsite and offsite work experiences. Working onsite is important for our business strategy and our culture. We also value the benefits that working offsite offers associates. Most hybrid roles require associates to work onsite every other week (all business days, M-F) in a Fidelity office.

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.

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 experiences. For information about working at Fidelity, visit FidelityCareers.com. Fidelity Investments is an equal opportunity employer. Fidelity will reasonably accommodate applicants with disabilities who need adjustments to complete the application or interview process.

If you would like to request an accommodation, please contact us at:

accommodations@fmr.com

Apply

Join us

At Fidelity, you’ll find endless opportunities to build a meaningful career that positively impacts peoples’ lives, including yours. You can take advantage of flexible benefits that support you through every stage of your career, empowering you to thrive at work and at home. Honored with a Glassdoor Employees’ Choice Award, we have been recognized by our employees as a top 10 Best Place to Work in 2024. And you don’t need a finance background to succeed at Fidelity—we offer a range of opportunities for learning so you can build the career you’ve always imagined.

Fidelity's working model blends the best of working offsite with maximizing time together in person to meet associate and business needs. Currently, most hybrid roles require associates to work onsite all business days of one assigned week per four-week period (beginning in September 2024, the requirement will be two full assigned weeks).

We invite you to Find Your Fidelity at fidelitycareers.com.

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.

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.

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.

Benefits
Learning & development
Culture

Benefits that adapt to everything life sends your way

401(k) with company match

Medical, dental, vision and prescription drug coverage

16-week maternity leave & 12-week parental leave

Student loan assistance

Fidelity is invested in you

Committed to Professional Development

At Fidelity, we are constantly adapting to the changing needs of our customers, new technologies, and better ways of working. And we empower our employees to do the same, with an emphasis on developing skills and connections that will help propel you forward in your career while being able to make an impact for Fidelity’s customers around the world.

We offer a wide range of options for professional development including online, in-person, and mentor driven solutions. Special interest and networking groups are also part of our culture of empowerment, personal and professional enrichment, diversity and inclusion, and knowledge sharing.

Continuing Education & Training

  • Assess, build, and align your development plan through resources like our skill-building classroom and online courses.
  • Video-based training for technology, leadership, management & more.
  • Ongoing skills development and coaching opportunities.
  • Paid training with a facilitator who is dedicated to your onboarding and will track and evaluate your progress, giving you strategies to improve.
  • A range of talent development programs to support career mobility.

Mentoring

  • Utilize the skills of experienced leaders to enrich your career.
  • Dedicated mentors to help you grow into new areas of Fidelity’s business as you develop new skills.
  • An open atmosphere of knowledge sharing and collaboration.
  • Opportunities to pay it forward, sharing the knowledge you develop and as you help others define how they want their career to take shape.

Our Commitment to Diversity and Inclusion

"Fidelity believes in, and is committed to, fair and equitable treatment for every associate and customer, and to creating a safe and respectful environment, in which everyone is treated with kindness, compassion and respect." Abby Johnson | Chairman and CEO Fidelity Investments

At Fidelity, we are committed to building an enduring culture of inclusion and belonging that will attract, develop and retain a diverse workforce.

Fidelity’s ten affinity groups are self-organized groups of employees with common interests in areas such as race, ethnicity, gender or sexual orientation, or who share similar interests based on similar sets of experiences.

These Employee Resource Groups and Special Interest Groups are models of inclusion for Fidelity. They’re also a powerful form of engagement and development and can provide a pathway to visible leadership roles. Our affinity groups make a large contribution on the business, helping to ensure our products and services are delivered in a welcoming and equitable environment.

  • Over 22K employees participate in an affinity group.
  • Over 1,400 affinity group members volunteered for Fidelity Cares in 2020.
  • 74% increase in affinity group memberships over the last three years.

Giving Back to Our Communities

Throughout Fidelity, you’ll find a genuine commitment to social responsibility – where we strive to make an impact for customers, while also making an impact on the world.

Fidelity Cares

  • Provides associates with opportunities to actively volunteer and share their talents.
  • Hosts numerous company-wide volunteer events (in-person and virtual).
  • Partners with nonprofit organizations to support our local communities.
  • More than 12,000 associates donate time annually – from interns to SVPs.
  • Impact includes refurbishing schools, donating books and supplies, and teaching financial literacy.

Fidelity Charitable®

  • Created to make it easy for people to support charitable organizations they care about.
  • Helped deliver $7.3 billion in donor-recommended grants to charity in 2019.
  • Supported more than 300,000 unique charities around the world.
  • Since its inception, more than $42 billion has been given to public charities.

Technology careers at Fidelity

Imagine and create the next generation of financial products and tools.

Similar Jobs

Apply now
See more open positions at Fidelity
Privacy policyCookie policy