Job Description:
Principal AI Engineer
The Role
Fidelity Labs is looking for a Full-stack Software Engineer to help us build Generative AI powered applications for investment. You will join a new startup team to apply cutting edge Agentic AI technologies to build exciting new products, from ideation to deployment.
What You will Work on
- Design, build, and integrate agentic applications (LangGraph and/or Google ADK) end-to-end.
- Develop and maintain APIs with FastAPI and REST best practices.
- Implement prompt/context engineering for LLM agents.
- Create indexing and retrieval pipelines (embeddings, vector stores, RAG).
- Integrate external tools, services, and data sources into agent workflows.
- Build, connect, and maintain user-facing apps with React and Next.js.
- Lead UI architecture, state management, and performance optimization.
- Write clean, tested, production-quality code on both frontend and backend.
The Experience and Skills You Bring
- Bachelor’s degree in computer science, engineering, or similar technical discipline
- 5–7 years full-stack engineering experience in Python and modern frontend (React/Next.js).
- 5+ years Python (features, packaging, testing, async).
- 4+ years React and Next.js (components, hooks, routing, SSR/SSG).
- 3+ years API development with FastAPI and REST.
- 1+ years with agent frameworks (LangGraph, Google ADK, or similar).
- Proven ability to develop full end-to-end integrations and connect backend services with frontend applications.
- Hands-on experience with: Prompt/context engineering, Vector databases/indexing and LLM orchestration frameworks
- Strong testing skills (unit and E2E) across frontend and backend.
- 1+ years DevOps (CI/CD, containerization, cloud, monitoring).
- Multi-agent systems, tool calling, workflow orchestration.
- Asynchronous/event-driven architectures.
- D3/Plotly graphing libraries.
- State management libraries like Redux.
- Experience with GraphQL.
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 craft 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. 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. We provide a safe space for startup teams to explore new business ideas, quickly test them with customers, and scale the most promising concepts within an existing business unit, or as a new venture. Learn more at https://labs.fidelity.com/.
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.
Most roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles. Please consult with your recruiter for the specific expectations for this position.
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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.
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.
Hybrid work schedule
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 all business days of every other week in a Fidelity office.
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.