Back End Developer

Senior Backend Developer | Python, AI, ML, NLP | Start-Up | Bristol (4-days onsite)

We are hiring a Senior Backend Developer with strong Python expertise and experience building AI-enabled systems to join a team developing an advanced communications platform.

This role is suited to someone who enjoys designing scalable backend systems, integrating AI capabilities, and mentoring engineers while contributing to the technical direction of a growing platform.

Key Responsibilities

Design, build, and maintain scalable backend services and APIs using Python

Ensure performance, reliability, and security across backend systems

Maintain high standards for testing, documentation, and code quality

AI Integration

Develop and integrate AI-powered functionality within backend services

Work with AI/ML tooling, data pipelines, and large language model APIs

Collaborate with AI specialists to deploy and maintain intelligent services

Identify opportunities for automation and intelligent features across the platform

Technical Leadership

Support and mentor junior developers through code reviews and collaborative development

Contribute to coding standards, engineering practices, and architectural decisions

Work closely with product and engineering teams to deliver impactful features

Requirements

5+ years backend development experience with strong Python expertise

Experience designing RESTful APIs, microservices, and scalable backend systems

Knowledge of cloud platforms such as AWS, Azure, or GCP

Experience integrating AI or machine learning services, including LLM APIs

Strong problem solving ability and collaborative mindset

Experience mentoring developers or contributing to technical leadership

Nice to Have

Experience with containerisation technologies such as Docker or Kubernetes

Familiarity with CI/CD and DevOps practices

Exposure to model deployment or MLOps practices

Experience designing distributed or event driven systems

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