Principal Software Engineer

We 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.

• Lead 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.

Qualifications:

• 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) architectures
  • Agentic AI systems (tool‑using agents, orchestration, multi‑step reasoning workflows). 
• Experience with spec‑driven AI‑assisted development

Click here to view how Epsilon transforms marketing with 1 View, 1 Vision, 1 Voice.

When you join Epsilon, we’ll create something EPIC together. We’re a global leader in data and identity, with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services. Positioned at the center of Publicis Groupe, Epsilon helps brands deliver personalized experiences at scale and build lasting customer relationships by unlocking the full potential of data and identity. Epsilon operates in 30+ countries across EMEA, the Americas and APAC, with more than 8,000 employees.

Check out a few of these resources to learn more about what makes Epsilon so EPIC:

Our Culture: https://www.epsilon.com/us/about-us/our-culture-epsilon

Life at Epsilon: https://www.epsilon.com/us/about-us/epic-blog

Epsilon has five values that define our culture and guide us as we create value for our clients, our people and consumers. We seek candidates who align with our company values, demonstrate them and make them meaningful in their day-to-day work:

• Act with integrity. We are transparent and have the courage to do the right thing.
• Work together to win together. We believe collaboration is the catalyst that unlocks our full potential.
• Innovate with purpose. We shape the market with big ideas that drive big outcomes.
• Respect all voices. We embrace differences and foster a culture of connection and belonging.
• Empower with accountability. We trust each other to own and deliver on common goals.

Because You Matter

As 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:

• Time to recharge: Flexible time off (FTO), 14 paid holidays, paid sick time
• Family well-being: Parental/new child leave, childcare & elder care assistance, adoption assistance
• Extra perks: Comprehensive health coverage, 401(k), tuition assistance, commuter benefits, professional development, employee recognition, charitable donation matching, health coaching and counseling

Epsilon 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 who need accommodations to complete the application process. Please reach out to LeaveofAbsence@epsilon.com to request an accommodation.

For San Francisco Bay and Los Angeles Areas: Epsilon will consider qualified applicants with criminal histories for employment 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.