Principal, Full Stack Engineer (Node, Python, Angular/ React)

Job Description: You will be part of the team responsible for the creation and support of the Cognitive Computing Platform. This platform enables customers to interact with Fidelity in natural language across the channels that are important to them. You'll help deliver reliable runtime services and operational practices that allow teams to run AI-enabled solutions consistently and safely, including dynamic experiences rendered within conversational chat. As part of the team, you will implement solutions that enable customers to get the most out of what Fidelity can offer. You will create intuitive and highly engaging conversational experiences that help digitally savvy customers take control of their finances and feel confident in the choices they make. Preferred

Qualifications: Broad experience across the full software development and delivery lifecycle, from design and implementation through testing, deployment, and ongoing support. Strong engineering proficiency in Node.js and Python, with the ability to design and implement scalable, maintainable backend services. Experience building enterprise-grade conversational and interactive UI components using REACT, vue frontend frameworks, along with hands-on experience using front-end testing frameworks like Jest, Cypress, or Playwright. Hands-on experience working with NoSQL data stores such as MongoDB, DynamoDB, or ElastiCache, including data modeling and performance optimization. Solid grounding in DevOps/SRE practices, including monitoring, alerting, incident response, reliability engineering, and building production systems with an operational mindset. Proven experience designing and consuming RESTful APIs, using Service-Oriented Architecture, and applying strong Object-Oriented Programming principles. Familiarity with OpenAPI/Swagger and structured JSON-based service contracts, including versioning and documentation best practices. Practical experience working within Agile development methodologies, collaborating closely with cross-functional teams to deliver iterative value. Exposure to major cloud platforms (AWS, GCP, Azure), including hands-on experience with cloud-native services, deployment pipelines, and distributed architectures. AI / GenAI Skills (Preferred) Working knowledge of LLM concepts (prompting patterns, token limits, latency considerations) Retrieval-Augmented Generation (RAG) fundamentals and embedding-based search concepts Model evaluation basics (quality, safety, and regression testing) using modern evaluation frameworks and benchmark datasets Responsible AI practices (guardrails, privacy considerations, and secure usage patterns) Operational awareness for GenAI solutions (cost, performance, reliability, and safe usage) Understanding of observability for LLM-based applications, including logging/metrics/tracing at the prompt and inference layers. Helpful Education / Certifications Undergraduate degree (BS, BA, etc.) or equivalent work experience Relevant cloud, DevOps/SRE, or AI/ML certifications are a plus The Skills You BringStrong desire and ability to learn new technologies and approaches Ability to synthesize business needs into scalable technology solutions Ability to work across organizations and drive positive outcomes Comfort operating in a polyglot development environment Excellent verbal and written communication skills Ability to collaborate with data science and product teams to operationalize AI use cases The Value You Deliver Build and deliver scalable solutions on a scrum team benefiting multiple business units Work across an empowered and autonomous organization to achieve the best outcomes Contribute to a developer culture of quality and sustainability through automation Share knowledge and provide technical guidance to peers through code reviews and design discussions Help teams operationalize GenAI solutions with attention to reliability, safety, and repeatability Fidelity's Onsite Working Model Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.

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.