Senior Software Engineer Python

Senior Software Engineer (Python)

Hybrid London (1-3 days per week)

Up to £80,000 + Benefits

Are you a passionate Python engineer who thrives on building scalable, high-quality software? We're working with a multi-award-winning digital agency, recognised as one of the Sunday Times Best Places to Work, that's looking for a Senior Software Engineer (Python) to help shape the next generation of their data-driven tools and products.

Why this role?

• Work at the intersection of data, automation, and AI, delivering tools that drive measurable impact for global brands.

• Join a collaborative, innovative engineering culture where learning, experimentation, and technical excellence are at the core.

• Hybrid flexibility: 1-3 days per week in the London office, balance the rest remotely.

• Be part of a company that has won multiple Performance Marketing Employer of the Year awards - and genuinely invests in its people.

? What you'll be doing:

• Designing, building, and maintaining scalable Python-based applications and microservices.

• Developing internal tools and automation to support both client delivery and internal teams.

• Building, testing, and deploying RESTful APIs using frameworks like FastAPI or Django REST Framework.

• Collaborating with data and platform engineers to integrate new features and optimise performance.

• Ensuring robust engineering practices including CI/CD, TDD, and secure development.

• Supporting and mentoring junior engineers, helping raise the technical bar across the team.

• Staying hands-on while contributing to the architectural direction and long-term roadmap.

? What we're looking for:

• 5+ years of experience as a Software Engineer, ideally in Python (3.10+).

• Proven experience developing cloud-native applications (GCP or AWS).

• Strong understanding of CI/CD pipelines (e.g. GitHub Actions) and containerisation (Docker).

• Experience designing scalable, secure systems using modern principles (SOLID, TDD).

• Familiarity with databases (SQL, NoSQL, or graph) and API integrations.

• Excellent communicator who thrives in a collaborative, fast-paced environment.

? Nice-to-haves:

• Experience with Generative AI / LLMs in applied engineering contexts.

• Exposure to infrastructure-as-code (Terraform, CloudFormation, or CDK).

• Familiarity with Vue.js or other front-end frameworks for collaboration with UI teams.