Senior Backend Engineer — Scalable APIs & Systems

Publicis Groupe UK; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Pension

Life Assurance

Private Medical

Income Protection Plan

WORK YOUR WORLD opportunity

REFLECTION DAYS

HELP@HAND BENEFITS

FAMILY FRIENDLY POLICIES

FLEXIBLE WORKING

GREAT LOCAL DISCOUNTS

Job summary

A leading marketing firm in Greater London seeks a Senior Backend Engineer to design and develop scalable backend systems. You will write production-grade code, solve distributed systems challenges, and collaborate with cross-functional teams. The ideal candidate has expertise in Python and frameworks like FastAPI or Node.js, as well as CI/CD experience. This role supports hybrid working, offering excellent benefits including wellness days and flexible working arrangements.

Qualifications

• Demonstrable 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.

Responsibilities

• Architect distributed backend services and APIs using Python, FastAPI, Node.js, or equivalent frameworks.
• Write high-quality, maintainable, production-ready code.
• Optimize services for latency, concurrency, throughput, and cost efficiency.

Skills

Python

FastAPI

Node.js

SQL

NoSQL

Docker

Kubernetes

Cloud platforms (AWS or GCP)

Tools

GitHub Actions

Jenkins

Argo

Job description

A leading marketing firm in Greater London seeks a Senior Backend Engineer to design and develop scalable backend systems. You will write production-grade code, solve distributed systems challenges, and collaborate with cross-functional teams. The ideal candidate has expertise in Python and frameworks like FastAPI or Node.js, as well as CI/CD experience. This role supports hybrid working, offering excellent benefits including wellness days and flexible working arrangements.