Senior Backend Engineer

M-XR; City Of London; Hybrid; GBP 60,000 - 100,000; Full time

Job summary

A pioneering technology company in the United Kingdom is seeking a Senior Backend Engineer to drive the design and implementation of backend application services for their web platform. The ideal candidate will have over 5 years of experience in backend development and proven skills in building RESTful APIs. You will help integrate with ML infrastructure and create innovative solutions for 3D content generation. This role offers competitive salary, equity, and flexible hybrid working arrangements.

Benefits

Competitive salary and equity

Flexible hybrid working

Visa sponsorship for international candidates

Qualifications

• 5+ years backend development experience with production applications.
• Proven experience designing and implementing RESTful APIs at scale.
• Strong experience with Python and modern web frameworks.

Responsibilities

• Define, build and maintain the backend application services for the SaaS platform.
• Work with frontend developers to design high-performance APIs.
• Integrate with ML infrastructure to orchestrate model workflows.

Skills

Backend development experience

RESTful APIs design

Python

TypeScript

Data-intensive web apps

Tools

FastAPI

Auth0

Stripe

MongoDB

PostgreSQL

AWS S3

Job description

Our vision

From blockbuster films and AAA games to immersive experiences, the demand for photo‑real 3D content has never been higher - but creating photorealistic assets is slow, expensive, and manual with no current scalable solution available.

At M‑XR, our mission is to democratise the creation of high‑quality 3D assets and empower brands, studios, and creators to build infinite photo‑real 3D experiences. Our proprietary technology Marso allows anyone to capture real‑world objects into production‑ready photorealistic digital twins with unmatched material (PBR) accuracy - enabling the first real‑world PBR capture pipeline that can operate anywhere. Marso is trusted by the most demanding studios in film and gaming.

We see the future of 3D as AI‑assisted, and we’re building the tech to make that happen. We are creating the world’s highest quality and most comprehensive 3D‑PBR data‑set and training the next generation of AI models to assist artist workflows.

About the role ✨

We are looking for a Senior Backend Engineer to join the team and be the driving force that designs, builds and scales the backend application services for our web platform.

At M‑XR we developed Marso as a way to capture real‑world PBR material data alongside conventional photogrammetry from simple flash photography. Marso is now actively being used by an array of studios, brands & museums to digitise previously unobtainable assets at scale. This gives us one of the most unique and physically accurate 3D datasets in the world.

Now we’re building an ML‑powered pipeline that can automatically predict material properties (diffuse, roughness, specular, metallic, normals) from photogrammetry input alone - without flash. This is made possible by tapping into our uniquely rich dataset of real‑world material scans. Our goal is to remove the need for manual texturing and enable full end‑to‑end automation, from photos to PBR assets at high fidelity and scale.

You’ll be helping bring this technology to market. We are creating a web SaaS platform that will bring completely new capabilities for PBR generation to artists world‑wide based on state‑of‑the‑art AI models that we create.

Where you will have impact! 🚀

• Define, build and maintain the backend application services for our web SaaS platform, enabling new 3D‑PBR asset creation workflows.
• Work with frontend developers to design and implement high‑performance APIs that deliver exceptional user experiences.
• Integrate with ML infrastructure to orchestrate model workflows, manage job queues, and deliver results to users.

This is a high‑impact role for someone that loves to define and bring completely new technologies to market - with the experience that defines how we do it.

What you will do

• Design and implement user‑facing APIs to support frontend user flows (FastAPI)
• Build robust user authentication, authorisation, and account management (Auth0)
• Integrate payment processing and subscription management (Stripe)
• Design and manage user databases and data models (MongoDB, PostgreSQL)
• Implement asset storage, retrieval, and management systems (AWS S3)
• Build job queue management for async ML workflows (SNS, SQS)
• Setup application monitoring and logging (CloudWatch, Grafana, Prometheus)
• Implement CI / CD for application deployment (Bitbucket Pipelines)
• Create API documentation and developer tools

What we are looking for

• 5+ years backend development experience with production applications
• Track record with at least one live application currently serving users in production
• Proven experience designing and implementing RESTful APIs at scale
• Strong experience with Python and modern web frameworks
• Comfortable working in TypeScript for frontend integration debugging
• Experience in building infrastructure for image / video / 3D or graphics‑intensive / data‑intensive web apps

Bonus points

• Experience working with researchers, product engineering and product managers bringing new AI capabilities to market
• A love of games, films and understanding of photogrammetry, scanning, graphis, rendering and AAA 3D asset creation.

What we offer

• The chance to shape the future of 3D content creation in a fast‑moving startup
• Direct contact & close relationships with some of the biggest game & film studios globally using M‑Xr's technology
• Work with passionate engineers, artists, and researchers at the frontier of graphics & AI
• Unique opportunities for professional growth, autonomy, and leadership
• Competitive salary and equity
• Flexible hybrid working
• Visa sponsorship for international candidates

Interested?

If you are interested in this role, we would love to hear from you!

Please email us at [e-mail] List the job title in the description, and please provide a cover letter & CV.