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**Principal Full Stack Engineer** drives MarTech & CDP advancements at Fidelity. Lead platform design, development, integration, and support using Twilio Segment CDP, AWS (Kubernetes, Lambda, APIs), Snowflake, and marketing activation channels. Expertise in data engineering, architecture, and AI/ML to optimize segmentation and targeting. Champion collaboration with cross-functional teams and stakeholders. Bachelor's degree or equivalent experience required. 10+ years in software engineering, with a focus on Marketing Technology and Data Engineering. Fidelity transitioning to an onsite working model.
- Compensation
- Not specified USD
- City
- Not specified
- Country
- United States
Currency: $ (USD)
Full Job Description
Job Description:
Note: Fidelity will not provide immigration sponsorship for this position.
The Role
Fidelity Investments is looking for an experienced Principal Engineer to deliver the next stage in the evolution of our Marketing Technology and Data Platform capabilities. In this demanding role, you will lead platform, capabilities and application design, development, configuration, testing, and support of a complex Customer Data Platform (CDP) ecosystem that is modernizing marketing audience management and cross-channel communications.
The Expertise and Skills You Bring
Technology
- 10 plus years of overall software engineering experience
- Strong hands-on experience in solution architecture design and delivery, with a focus on Marketing Technology and Data Engineering
- Deep expertise in Twilio Segment Customer Data Platform, including platform administration and features such as identity resolution, usage and governance, and functional capabilities like zero-copy linked audience management, activations, integrations, sources (Web, Events, Datawarehouse), and destinations (SaaS platforms such as Salesforce, Adobe, Files, APIs)
- Proven experience integrating CDP solutions across AWS cloud environments, SaaS platforms, Snowflake, and custom applications/APIs
- Experience leveraging CDP for cross-channel marketing activations, including Email, Web, Mobile, and journey-based marketing delivering real time, always on as well batch campaigns and communications
- Strong experience building full-stack solutions on AWS, including Kubernetes, Lambda, APIs provider and consumer, and event-driven architectures, messaging platforms and company frameworks with, with development in Java and Python.
- Strong experience in Snowflake data architecture and engineering, including Data modeling, Creating and managing tables and views, Writing and reviewing SQL queries, Cluster right-sizing, Performance tuning and compute cost optimization for high-volume data processing (tens of millions of records)
- Experience with database technologies such as DynamoDB and PostgreSQL
- Certifications in AWS, Snowflake, or MarTech platforms are a plus
- Experience designing and building solutions with strong non-functional characteristics, including information security, availability, scalability, performance, reusability, and agility
- Leverage AI/ML and LLM capabilities to drive advanced segmentation, targeting, and content optimization
- Skills to prototype and integrate Generative AI solutions (prompt engineering, RAG, embeddings) into MarTech platforms and campaign workflows
- Skills to design and integration of AI-enabled solutions across CDP, orchestration, and activation systems
- Ability to partner with data science teams to operationalize predictive models (propensity, churn, lifetime value)
- Support responsible AI adoption, including governance, data privacy, and performance optimization
- Bachelors degree in Computer Science or equivalent experience
Leadership and Communication
- Excellent communication and articulation skills, with the ability to build relationships and influence cross-functional teams
- Proven ability to collaborate with marketing, business, and technology stakeholders, as well as SaaS vendors, to simplify complex concepts and drive alignment on solutions and trade-offs
- Strong presence to demonstrate platform features, capabilities, and solutions to support key organizational initiatives
- Excellent analytical and problem-solving skills, with an innovative and forward-thinking approach to addressing challenges within complex data and SaaS environments
- Subject matter expertise in marketing segmentation, data, and end-to-end campaign setup and activation across Email, Web, Mobile, and Paid Media channels
The Team
Fidelity is embarking on a multi-year journey to modernize and unify its Marketing, Data, and Communication Technology capabilities across the organization. This initiative will transform Fidelity into a customer-centric, data-driven, digital-first enterprise that delivers measurable customer and business value.
Fidelitys 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.
Certifications:
Category:
Information TechnologyPlease be advised that Fidelitys 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.
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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