Senior Backend Engineer

Company description

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.

Performics is the Performance Centre of Excellence within Publicis Groupe, delivering technology, data, and AI-driven marketing solutions for global brands. One Suite is our unified marketing intelligence and automation platform powering agentic workflows, data processing, analytics services, and channel automation across Search, Social, Programmatic, Commerce, and Measurement.

Backend engineering is foundational across all One Suite — providing the APIs, integration layers, orchestration runtimes, and backend systems that power every charter, from Agent Studio to AOE, DFP, Channels, and SRE.

We are seeking a Senior Backend Engineer (Individual Contributor) to lead the design, development, and evolution of backend systems across One Suite.

This is a hands‑on engineering role — you will write production‑grade code, solve complex distributed systems problems, shape backend patterns, and guide other engineers through technical influence (not supervision).

As a Senior IC, you will help define service architecture, enforce engineering best practices, and collaborate across multiple charters to ensure One Suite’s backend systems are scalable, reliable, secure, and performant.

Backend Architecture & System Design

• Architect distributed backend services and APIs using Python, FastAPI, Node.js, or equivalent frameworks.
• Design modular, observable, and scalable backend components for orchestration, data services, and platform integrations.
• Define patterns for microservices, domain boundaries, caching, queuing, resiliency, and error handling.
• Build robust service‑to‑service communication mechanisms (REST, gRPC, event‑driven patterns).
• Implement secure authentication, authorization, rate limiting, and multi‑tenant access controls.

Hands‑On Backend Development

• Write high‑quality, maintainable, production‑ready code.
• Integrate with external APIs (marketing platforms, cloud services, internal microservices).
• Build and maintain CI/CD pipelines and infrastructure‑as‑code environments.
• Lead code reviews, mentor engineers, and ensure high engineering standards.
• Contribute to platform SDKs, internal libraries, and backend frameworks used across charters.

Performance, Reliability & Observability

• Implement tracing, structured logging, metrics, dashboards, and alerting.
• Optimize services for latency, concurrency, throughput, and cost efficiency.
• Ensure system reliability through automated testing, load testing, error budgets, and resiliency strategies.
• Partner with SRE to define SLIs/SLOs and improve platform‑wide reliability.

Cross‑Functional Collaboration

• Work closely with Studio, AOE, DFP, Channel, and SRE teams on shared backend designs.
• Collaborate with Product Managers and UX research teams to translate requirements into backend capabilities.
• Align architecture decisions across charters to ensure consistency and maintainability.

• 6–8 years of backend engineering experience, with architectural ownership over services or distributed systems.
• Expertise in Python, FastAPI, Flask, or Node.js and modern backend development patterns.
• Strong understanding of microservices, concurrency, async programming, and event‑driven architectures.
• Proficiency with SQL and No
  
  SQL databases (Postgre
  
  SQL, Dynamo
  
  DB, Redis, Mongo
  
  DB).
• Hands‑on experience with Docker, Kubernetes, and cloud platforms (AWS or GCP).
• Strong CI/CD experience using Git Hub Actions, Jenkins, Argo, or similar tools.
• Deep knowledge of observability practices — logs, metrics, traces, performance analysis.
• Proven ability to write clean, testable, well‑structured production code.

• Experience with…