Senior Back End Engineer

W Talent
London, United Kingdom
Last week
£80,000 – £120,000 pa

Salary

£80,000 – £120,000 pa

Job Type
Permanent
Work Pattern
Full-time
Work Location
On-site
Seniority
Senior
Education
Degree
Posted
1 May 2026 (Last week)

Senior Backend Engineer

Location: London

Work Type: On-site

Company Description

We are a rapidly growing consumer technology company operating at the intersection of AI, aesthetics, and digital experiences. With a global community of millions, we are building innovative AI-driven products that are transforming how users engage with and understand visual data.

Our offerings range from consumer-facing AI analysis tools to partnerships with leading global brands. As we scale quickly, we are expanding our team and pushing the boundaries of how technology and user experience come together.

Role Description

We are seeking a talented Senior Backend Engineer to join our London-based team full-time. You will play a key role in building and scaling the core infrastructure of our AI platform, owning critical backend systems, and supporting rapid product growth.

This is a high-impact, fast-paced role with significant autonomy, where your work will directly influence product direction and user experience.

Key Responsibilities

Design and implement backend services and APIs using Python, FastAPI, and Django

Build and maintain scalable RESTful APIs with PostgreSQL

Develop and integrate AI/LLM-powered features using frameworks such as LangChain

Implement and manage payment systems, including Stripe integrations and subscription flows

Build image processing and computer vision pipelines

Write clean, maintainable, and well-documented code deployed via Docker and CI/CD pipelines

Collaborate using GitHub, maintaining high code quality and team standards

Work with BaaS platforms (e.g., Supabase) for authentication, storage, and real-time functionality

Ensure performance, scalability, and security best practices

Collaborate cross-functionally with Product, Design, and Frontend teams

Contribute to architectural decisions and mentor other engineers

Develop data-driven backend services and pipelines

Support production systems and deployments within a small, high-performing team

Qualifications

5+ years of professional software engineering experience

Strong Python expertise with backend development experience

Proven experience with FastAPI and/or Django, REST APIs, and PostgreSQL

Experience integrating Stripe for payments and subscriptions

Familiarity with image processing and computer vision

Experience with Docker, GitHub, and modern deployment workflows

Knowledge of cloud platforms (AWS, GCP, or Azure)

Strong understanding of software design principles (SOLID, patterns, clean code)

Experience with BaaS platforms such as Supabase or Firebase

Ability to thrive in fast-paced, high-ownership environments

Nice to Have

Experience with LLM APIs (e.g., OpenAI, Anthropic, Gemini) and LangChain

Background in AI/ML (e.g., generative models, GANs, diffusion, regression)

Experience building data pipelines and data-driven systems

Familiarity with workflow orchestration tools (e.g., Temporal, Prefect)

Why Join

Be part of a fast-growing company in the AI and consumer tech space

High ownership and autonomy over technical decisions

Work closely with founders and a mission-driven team

Strong market traction and growth potential

Opportunity to shape a rapidly evolving industry

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