Principal Full Stack Engineer Jobs
Principal Full Stack Engineer jobs are open across fintech, healthtech, enterprise SaaS, and e-commerce, from senior engineer to staff and principal levels, with specializations in distributed systems, API architecture, and cloud-native development. Find a role that fits from the openings below and apply directly.
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Showing 5 of 72+ Principal Full Stack Engineer jobs
Job Description:
Are you interested in joining a dynamic, innovation focused, high impact team? Do you enjoy building new products and services in a collaborative, fast paced environment?
Join Fidelity Labs, our in-house new business incubator, as one of the founding Principal Full Stack Engineers for an early-stage GenAI startup for investment research. In this role, you will be responsible for working across the development and product teams to build and scale a modern.
As a Principal Full Stack Engineer, you will play a pivotal role in building new application experiences and business capabilities to support a new business initiative. You will work closely with the Director of Engineering and cross-functional teams, driving technical decisions and ensuring the delivery of scalable, maintainable solutions.
Key Responsibilities:
- Lead the design and development of modular, reusable front-end components in Angular, enabling sharing across multiple product teams.
- Architect and implement robust back-end services using Python, EKS, and AWS, with a focus on scalable, secure, and maintainable solutions.
- Champion best practices in modular application design, including micro-frontends, shared libraries, and integration patterns.
- Collaborate with product, UX, and engineering teams to translate business requirements into technical solutions.
- Drive the adoption of modern CI/CD pipelines and DevOps practices for rapid, reliable delivery.
- Mentor and guide other engineers, fostering a culture of technical excellence and continuous improvement.
Required Skills & Experience:
- A Bachelor's or Master’s degree in computer science, Engineering, or a related field
- 6 - 10 years of professional software engineering experience, with a proven track record of delivering complex applications.
- 3 - 5 years of technical leadership experience
- Deep full-stack expertise in Python, EKS, HTML, CSS, JavaScript, Angular, AWS, and database systems.
- Strong understanding of modular architecture, component sharing, and scalable design principles.
- Experience building and integrating RESTful APIs and working with cloud-native technologies.
- High degree of autonomy and ownership; able to drive projects forward with minimal oversight.
- Excellent communication and collaboration skills, with the ability to influence and align stakeholders.
Bonus Points:
- Prior experience developing Gen AI applications
- Prior work in a startup or incubator environment, building products from the ground up.
The Team
We are Fidelity Labs, Fidelity Investments’ in-house fintech incubator with a mission to build new businesses to drive growth for Fidelity. We seek to shape the future of our industry by building new products and services to improve the lives of the diverse set of customers, businesses and financial institutions we serve.
The base salary range for this position is $107,000-216,000 USD per year. Placement in the range will vary based on job responsibilities and scope, geographic location, candidate’s relevant experience, and other factors.
Base salary is only part of the total compensation package. Depending on the position and eligibility requirements, the offer package may also include bonus or other variable compensation.
We offer a wide range of benefits to meet your evolving needs and help you live your best life at work and at home. These benefits include comprehensive health care coverage and emotional well-being support, market-leading retirement, generous paid time off and parental leave, charitable giving employee match program, and educational assistance including student loan repayment, tuition reimbursement, and learning resources to develop your career. Note, the application window closes when the position is filled or unposted.
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.
Certifications:
Category:
Information Technology
Job Description:
Are you interested in joining a dynamic, innovation focused, high impact team? Do you enjoy building new products and services in a collaborative, fast paced environment?
Join Fidelity Labs, our in-house new business incubator, as one of the founding Principal Full Stack Engineers for an early-stage GenAI startup for investment research. In this role, you will be responsible for working across the development and product teams to build and scale a modern.
As a Principal Full Stack Engineer, you will play a pivotal role in building new application experiences and business capabilities to support a new business initiative. You will work closely with the Director of Engineering and cross-functional teams, driving technical decisions and ensuring the delivery of scalable, maintainable solutions.
Key Responsibilities:
- Lead the design and development of modular, reusable front-end components in Angular, enabling sharing across multiple product teams.
- Architect and implement robust back-end services using Python, EKS, and AWS, with a focus on scalable, secure, and maintainable solutions.
- Champion best practices in modular application design, including micro-frontends, shared libraries, and integration patterns.
- Collaborate with product, UX, and engineering teams to translate business requirements into technical solutions.
- Drive the adoption of modern CI/CD pipelines and DevOps practices for rapid, reliable delivery.
- Mentor and guide other engineers, fostering a culture of technical excellence and continuous improvement.
Required Skills & Experience:
- A Bachelor's or Master’s degree in computer science, Engineering, or a related field
- 6 - 10 years of professional software engineering experience, with a proven track record of delivering complex applications.
- 3 - 5 years of technical leadership experience
- Deep full-stack expertise in Python, EKS, HTML, CSS, JavaScript, Angular, AWS, and database systems.
- Strong understanding of modular architecture, component sharing, and scalable design principles.
- Experience building and integrating RESTful APIs and working with cloud-native technologies.
- High degree of autonomy and ownership; able to drive projects forward with minimal oversight.
- Excellent communication and collaboration skills, with the ability to influence and align stakeholders.
Bonus Points:
- Prior experience developing Gen AI applications
- Prior work in a startup or incubator environment, building products from the ground up.
The Team
We are Fidelity Labs, Fidelity Investments’ in-house fintech incubator with a mission to build new businesses to drive growth for Fidelity. We seek to shape the future of our industry by building new products and services to improve the lives of the diverse set of customers, businesses and financial institutions we serve.
The base salary range for this position is $107,000-216,000 USD per year. Placement in the range will vary based on job responsibilities and scope, geographic location, candidate’s relevant experience, and other factors.
Base salary is only part of the total compensation package. Depending on the position and eligibility requirements, the offer package may also include bonus or other variable compensation.
We offer a wide range of benefits to meet your evolving needs and help you live your best life at work and at home. These benefits include comprehensive health care coverage and emotional well-being support, market-leading retirement, generous paid time off and parental leave, charitable giving employee match program, and educational assistance including student loan repayment, tuition reimbursement, and learning resources to develop your career. Note, the application window closes when the position is filled or unposted.
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.
Certifications:
Category:
Information Technology
See All 72+ Principal Full Stack Engineer Jobs
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Find JobsPrincipal Full Stack Engineer Job Market
A snapshot from current openings nationwide, updated as new roles post.
Who's Hiring
- Fidelity Investments8
- CVS Health6
- Intuit6
- Cambridge Mobile Telematics4
- Broadcom3
Top Industries Hiring
- Technology & Software34
- Investment & Asset Management11
- Healthcare & Medical Services6
- Banking & Financial Services5
- Consulting & Professional Services5
What Employers Look For
The qualifications that appear most often in principal full stack engineer jobs.
- 8 or more years of full stack engineering experience with demonstrated technical leadership
- Deep proficiency in at least one backend language such as Go, Java, Python, or Node.js alongside a modern frontend framework
- Hands-on experience designing and operating distributed systems at production scale
- Proficiency with cloud platforms including AWS, Google Cloud, or Azure and their managed services
- Experience defining API contracts, data models, and system boundaries across multiple product teams
- Bachelor's degree in computer science, software engineering, or equivalent demonstrated experience
Tips for Your Principal Full Stack Engineer Job Search
Show system ownership not just contributions
At the principal level, hiring managers want to see that you drove architectural decisions end-to-end. Rewrite resume bullets to name the system you owned, the scale it operated at, and the measurable outcome your design choices produced.
Apply early to roles that fit
Migrate Mate lists principal full stack engineer openings from across the United States in one place, so you can find roles that match and apply directly to each listing.
Tailor your stack to each posting
Principal roles often have a primary stack buried three paragraphs into the description. Pull out the exact framework versions and cloud providers mentioned, then mirror that language in your resume summary so automated screeners flag your application as a match.
Build a portfolio of architecture decision records
A GitHub repo full of code tells a mid-level story. Attach architecture decision records or design documents to your portfolio to demonstrate the cross-functional reasoning and long-horizon thinking that distinguish principal engineers from senior ones.
Prepare a staff-to-principal promotion narrative
Interviewers for principal roles routinely ask how you influenced engineers who did not report to you. Prepare two or three specific examples where you shifted team direction, mentored a senior engineer through a hard problem, or resolved a cross-team technical conflict.
Negotiate scope before negotiating compensation
After an offer, ask the hiring manager to clarify what the role owns in the first year: which systems, which roadmap decisions, and which teams you partner with. Misaligned scope is the top reason principal engineers leave within eighteen months, so get it in writing before you accept.
Principal Full Stack Engineer Jobs: Frequently Asked Questions
Which companies are hiring the most principal full stack engineers?
The companies hiring the most principal full stack engineers right now include Fidelity Investments, CVS Health, and Intuit, with the largest share of openings in California, Massachusetts, and Texas, based on current listings on Migrate Mate as of June 2026. Demand is concentrated in fintech, enterprise SaaS, and healthtech, though openings appear across most major industries.
How many principal full stack engineer jobs are remote?
About 26% of principal full stack engineer openings are fully remote or hybrid as of June 2026, making it one of the more flexible senior engineering roles on the market. Sub-specializations in platform engineering, API design, and cloud infrastructure tend to carry the highest remote availability, while roles tied to on-site product teams or regulated industries more often require in-person presence.
How do you become a principal full stack engineer?
You become a principal full stack engineer by progressively owning larger and more complex systems, not just writing code. Start by volunteering to lead design reviews and document architectural decisions at the senior level. Build a reputation for mentoring other engineers and influencing cross-team technical direction. Consistently tie your technical choices to business outcomes, and actively seek projects that require coordinating with product, data, and infrastructure teams simultaneously.
Can you get hired as a principal full stack engineer with limited senior experience?
You can get hired at the principal level with limited traditional seniority if you can demonstrate principal-level impact through other evidence. Open source maintainership, published architecture decision records, a well-documented side project operating at scale, or a strong internal promotion case all substitute for years of title-matching experience. Focus your application on what you have built and how others relied on your technical judgment, not on the job titles you have held.
What does the principal full stack engineer interview process look like?
The principal full stack engineer interview process typically runs four to six rounds and includes a recruiter screen, a technical phone screen focused on system design, a coding round testing algorithmic depth, and a system design round where you architect a large-scale distributed feature. Most loops also include a cross-functional or leadership round where you walk through past decisions you made under ambiguity, followed by a final conversation with an engineering director or VP.
Where can I find and apply to principal full stack engineer jobs?
You can find and apply to principal full stack engineer jobs on Migrate Mate, which lists current openings from across the United States. Search the listings to find roles that match your stack and experience level, then apply directly to each one that fits. Every listing links to the application so you can move quickly on openings that align with what you are looking for.
See All 72+ Principal Full Stack Engineer Jobs
Jump back to the full list of openings and apply to any principal full stack engineer role that fits.
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