Principal Backend Engineer (Individual Contributor)Publicis Groupe is a global leader in communication and is positioned at every step of the value chain, from consulting to execution, combining marketing transformation and digital business transformation. Through a unified and fluid organization, Publicis Groupe partners with its clients across communication, media, data and technology to ensure access to the full breadth of capabilities in every market. Present in over 100 countries, Publicis Groupe employs around 103,000 professionals.We are seeking a Principal Backend Engineer (Individual Contributor) to set the technical direction for OneSuite data products and their integration into the broader platform. This is a hands-on principal role: you will write production-grade Python, design cross-repo architecture, lead high-risk technical decisions, and raise the standards other engineers use to build reliable systems. You will help build the backend and data foundation behind AI-assisted analyst workflows, including agents built with the Claude Agent SDK. That means turning complex marketing data into dependable services, tools, and agent experiences that can answer questions, surface issues, and support campaign decisions securely across clients.ResponsibilitiesArchitecture & ContractsData & Connector SystemsPlatform Backend & Agent IntegrationEngineering Quality, Reliability & LeadershipQualificationsMust Have10+ years of backend, data platform, or distributed systems engineering experience, including principal-level ownership across multiple services or teams.Expertise in Python backend engineering, API design, service boundaries, async/concurrent systems, SQL, and modern testing practices.Hands-on experience with Databricks, PySpark, lakehouse patterns, and medallion-style data architecture, or equivalent large-scale data pipeline experience.Strong AWS serverless experience, including Lambda, API Gateway, S3, DynamoDB, IAM, CloudFormation/SAM or equivalent infrastructure-as-code tooling.Deep understanding of multi-tenant SaaS design, authentication/authorization, tenant-scoped data access, secrets management, and operational security.Experience designing stable data contracts, CLI/API/MCP contracts, schema evolution patterns, and consumer-facing data models.Proven technical leadership through mentoring, architecture decisions, code review, trade-off communication, and engineering standards without relying on direct authority.Nice to HaveExperience with marketing, advertising, or platform APIs and similar ecosystems.Experience with Fivetran, custom connector development, connector reconciliation, or third-party data ingestion operations.Experience with Delta Lake, Unity Catalog, data governance, data lineage, and lakehouse performance optimization.Familiarity with AI/LLM systems, agentic workflows, MCP-style tool integration, or similar runtime/tooling architectures.Core CompetenciesTechnical Depth: You reason across backend services, data pipelines, cloud infrastructure, API contracts, and operations, then turn that reasoning into production code and durable architecture.Principal-Level Judgment: You sequence work pragmatically, separate reversible from irreversible decisions, and design systems that can evolve without constant rewrites.Product Impact: You connect architecture to OneSuite outcomes: trustworthy marketing insights, faster analyst workflows, reliable agent behavior, and reusable platform capabilities.Leadership & Collaboration: You raise engineering quality through clear standards, strong reviews, mentoring, written architecture, and crisp communication across product, data, SRE, and engineering teams.Why Join UsOwn principal-level architecture for marketing data products and their integration into a global AI and analytics platform. Work hands-on across Databricks, AWS serverless systems, agent runtimes, data contracts, and high-impact product surfaces. Shape patterns that let OneSuite scale across current and future marketing intelligence domains. Stay close to the code while influencing architecture, engineering standards, and technical direction across multiple teams and repositories.Additional informationOur Publicis Groupe motto "Viva La Différence" means we're better together, and we believe that our differences make us stronger. It means we honor and celebrate all identities, across all facets of intersectionality, and it underpins all that we do as an organization. We are focused on fostering belonging and creating equitable & inclusive experiences for all talent. Publicis Groupe provides robust and inclusive benefit programs and policies to support the evolving and diverse needs of our talent and enable every person to grow and thrive. Our benefits package includes medical coverage, dental, vision, disability, 401K, as well as parental and family care leave, family forming assistance, tuition reimbursement, and flexible time off. If you require accommodation or assistance with the application or onboarding process specifically, please contact All your information will be kept confidential according to EEO guidelines.
Compensation Range: USD $135,375.00 - USD $216,684.00/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 9/21/2026.