Senior Engineer (Backend)

MUBI; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A global streaming service is seeking a Senior Backend Engineer to enhance and scale their backend systems. You will lead the architectural design, mentor engineers, and optimize APIs across a global platform. Ideal candidates have extensive experience in Ruby on Rails and AWS, and a passion for developing robust infrastructures for film distribution.

Qualifications

• 6+ years in backend development, including 2+ in a senior engineering position.
• Expert-level Ruby on Rails and deep knowledge of its ecosystem.
• Strong experience with AWS services and cloud infrastructure.

Responsibilities

• Leading the design and implementation of scalable backend architectures and services.
• Modernizing our stack, migrating monolithic components to container-based systems.
• Architecting and optimizing high-performance APIs serving millions of users globally.

Skills

Ruby on Rails expertise

AWS services

Database design and optimization

Problem-solving skills

Security and authentication systems

Mentoring

Tools

ElasticSearch

DynamoDB

Redis

Sidekiq

Job description

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Overview

About MUBI

MUBI is a global streaming service, production company and film distributor dedicated to elevating great cinema. To make this possible, we create, curate, acquire and champion visionary films, bringing them to audiences all over the world. And we have a team of brilliant, ambitious and passionate individuals to help bring our mission to life. From London to New York, Istanbul to Paris, and Berlin to Mexico - we work together to realize MUBI's vision.

That\'s where you come in! Join our global team and help us make great cinema accessible to everyone, everywhere.

About the role

Role

MUBI is growing fast, and we\'re hiring a Senior Backend Engineer (London-based) to help scale and evolve MUBI\'s backend. You\'ll lead key architectural decisions, mentor the team, and tackle our most complex challenges across APIs, streaming, payments, data, authentication and more!

Ruby on Rails expertise is essential, and experience breaking down monoliths into service-oriented architectures is highly valued.

This is a chance to shape the future of a platform used by millions worldwide, modernising our infrastructure for film lovers everywhere.

Where you\'ll have impact

Where you\'ll have impact:

• Leading the design and implementation of scalable backend architectures and services across our global platform
• Modernizing our stack, migrating monolithic components to container-based systems (e.g. EKS).
• Architecting and optimizing high-performance APIs serving millions of users globally
• Building distributed systems leveraging ElasticSearch, DynamoDB, Redis, and Sidekiq.
• Overseeing critical systems including billing, payments, and subscription management.
• Mentoring junior and mid-level engineers, driving best practices through code reviews and technical guidance.
• Shaping technical roadmap in collaboration with engineering leadership

What you\'ll bring

What you\'ll bring:

Essential Requirements:

• 6+ years in backend development, including 2+ in a senior engineering position.
• Expert-level Ruby on Rails and deep knowledge of its ecosystem.
• Strong experience with AWS services and cloud infrastructure.
• Deep understanding of database design and optimization at scale.
• Track record of leading initiatives and mentoring teams.
• Excellent problem-solving skills; able to navigate ambiguity and influence decisions.
• Strong knowledge of security and authentication systems at scale.
• Curiosity and enthusiasm for continuous learning.

Nice to have:

• Experience with video streaming (DASH, HLS, DRM).
• Knowledge of CDN infrastructure and content delivery.
• Background in containerization and orchestration (Kubernetes/EKS).
• Infrastructure as code expertise (Chef, Terraform, etc.).
• High-volume payment processing and billing experience.
• Familiarity with DevOps practices and CI/CD pipelines.

We want to make cinema accessible to everyone. We believe people from different backgrounds bring different ideas that foster innovation and engagement, allowing us to attract great people to develop the best experience for our users.

MUBI is committed to being an Equal Opportunity Employer. That means it\'s our responsibility to ensure that all candidates are not discriminated against in our hiring processes and our employment decisions based on their race, color, religion, nationality or ethnic origin, age, gender identity or expression, sex, marital status, physical or mental disability, socioeconomic background, sexual orientation, family or parental status, or any other applicable characteristic.