Principal Software Engineer

Principal Software EngineeringWe are looking for a hands-on Principal Software Engineering to lead the development of a modern Integration Platform that ingests, transforms, and loads data from various third-party connectors into our core People Cloud Platform. This role demands strong technical leadership, deep software engineering expertise, and a passion for modern infrastructure and deployment practices. You will lead and mentor high-performing engineering teams while actively contributing to architectural decisions and code review efforts.ResponsibilitiesLead the design and implementation of an extensible integration platform to onboard and manage data from various systems.Architect and oversee data ingestion pipelines from external APIs, file-based sources, and event streams into the People Cloud using Databricks, Spark, and custom ETL services.Build reusable, scalable connector frameworks with monitoring, retry logic, and transformation capabilities.Ensure seamless integration with the People Cloud's APIs, data models, and customer-facing features.Drive backend development with Java/Spring Boot and real-time and batch data processing strategies.Oversee the frontend architecture (Angular) for internal tools and dashboards managing connectors, data flows, and transformation logic.Collaborate cross-functionally with product, data, and cloud infrastructure teams to align technical delivery with business goals.Ensure the platform is multi-cloud compatible, leveraging AWS, Azure, or GCP services where needed.Implement and maintain CI/CD pipelines, infrastructure as code, and blue-green deployment strategies for highly reliable releases.QualificationsQualifications:10+ years in software engineering, with a strong foundation in backend systems and data engineering.5+ years of leadership experience, including team building, mentoring, and delivery management.Expertise in Java, Spring Boot, REST APIs, and building cloud-native microservices.Strong understanding of data integration patterns, API consumption, and real-time/batch ETL.Experience building multi-connector frameworks is a big plus.Knowledge of Angular for front-end development and dashboarding.Proven experience with multi-cloud deployment, Kubernetes, Terraform, and observability tools.Experience with CI/CD pipelines and blue-green deployments in production environments.Bachelor's or Master's degree in Computer Science, Engineering, or a related field.Preferred Experience:Building integrations with systems like Salesforce, Workday, Marketo, Google Ads, Segment, Snowflake.Hands-on experience with Databricks, Spark, or equivalent data processing platforms.Strong understanding of data integration patterns, API consumption, and real-time/batch ETL.Experience with: RAG (Retrieval-Augmented Generation) architecturesAgentic AI systems (tool-using agents, orchestration, multi-step reasoning workflows).Experience with spec-driven AI-assisted developmentAdditional InformationWhen You Join Us, We'll Create Something EPIC Together Epsilon is a global data, technology and services company that powers the marketing and advertising ecosystem. For decades, we've provided marketers from the world's leading brands the data, technology and services they need to engage consumers with 1 View, 1 Vision, and 1 Voice. 1 View of their universe of potential buyers. 1 Vision for engaging each individual. And 1 Voice to harmonize engagement across paid, owned and earned channels.Epsilon's comprehensive portfolio of capabilities across our suite of digital media, messaging and loyalty solutions bridge the divide between marketing and advertising technology. We process 400+ billion consumer actions each day using advanced AI and hold many patents of proprietary technology, including real-time modeling languages and consumer privacy advancements. Thanks to the work of every employee, Epsilon has been consistently recognized as industry-leading by Forrester, Adweek and the MRC. Epsilon is a global company with more than 9,000 employees around the world.Our pillars aren't just words. They're how we show up every day.People centricity: We focus on employee well-being in an environment where colleagues truly care about each other.Collaboration: We work together, support one another, and collectively achieve goals.Growth: There are endless opportunities for growth through learning, development and career advancement.Innovation: We drive progress through cutting-edge solutions and forward-thinking approaches.Flexibility: We've created a balance between work and personal life, and we encourage adaptability to solve problems creatively.Our values guide us to create value for our clients, our people and consumers.Act with integrityWork together to win togetherInnovate with purposeRespect all voicesEmpower with accountabilityThese pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose.Because You MatterAs an Epsilon employee, you deserve perks and benefits that put you, your family and your finances first. Our benefits encompass a wide range of offerings, including but not limited to the following:Time to Recharge: Flexible time off (FTO), 15 paid holidaysTime to Recover: Paid sick timeFamily Well-Being: Parental/new child leave, childcare & elder care assistance, adoption assistanceExtra Perks: Comprehensive health coverage, 401(k), tuition assistance, commuter benefits, professional development, employee recognition, charitable donation matching, health coaching and counselingEpsilon benefits are subject to eligibility requirements and other terms.Epsilon is an Equal Opportunity Employer. Epsilon's policy is not to discriminate against any applicant or employee based on actual or perceived race, age, sex or gender (including pregnancy), marital status, national origin, ancestry, citizenship status, mental or physical disability, religion, creed, color, sexual orientation, gender identity or expression (including transgender status), veteran status, genetic information, or any other characteristic protected by applicable federal, state or local law. Epsilon also prohibits harassment of applicants and employees based on any of these protected categories. Epsilon will provide accommodations to applicants needing accommodations to complete the application process. Please reach out to View email address on click.appcast.io to request an accommodation.For San Francisco Bay and Los Angeles Areas: Epsilon will consider for employment qualified applicants with criminal histories in a manner consistent with the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance and San Francisco Police Code Sections 4901-4919, commonly referred to as the San Francisco Fair Chance Ordinance. Applicants with criminal histories are welcome to apply.Compensation Range: USD $129,500.00 - USD $240,500.00/Annually. This is the pay range the Company believes it will pay for this position at the time of this posting. Consistent with applicable law, compensation will be determined based on the skills, qualifications, and experience of the applicant along with the requirements of the position, and the Company reserves the right to modify this pay range at any time. Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan through a third-party benefits administration system once certain criteria have been met. Temporary roles may also qualify for participation in our 401(k) plan after eligibility criteria have been met. For regular roles, the Company will offer medical coverage, dental, vision, disability, 401k, and paid time off. The Company anticipates the application deadline for this job posting will be 9/2/2026.