Runware Greater London, England, United Kingdom
Runware Greater London, England, United Kingdom
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Build an industry leading AI-as-a-service platform as part of a top tier global team funded by the world's top investors. Work on cutting edge new product development, with a highly skilled and committed team that delivers excellence in AI performance and flexibility.
By combining proprietary hardware with accelerated software and orchestration, Runware delivers blazing-fast image generation at incredibly low cost. No image degradation, just supercharged image generation through a well-designed API that supports the entire Flux and Stable Diffusion ecosystem, including technologies like ControlNet, LoRAs, IP-Adapters, InstantID, and more.
About the role
We’re looking for aStaff-level Vanilla PHP Developerto take ownership of our user systems and backend orchestration layers. You’ll be responsible for designing and implementing clean, modular PHP code (without frameworks) while ensuring architectural simplicity, codebase maintainability, and high-quality integration with frontend and API services.
Responsibilities
* Architect and implementcore backend systems in Vanilla PHP, including user account management, session handling, role-based access control, and internal service logic.
* Develop and extend an existing Symfony-based system - established alongside our vanilla PHP applications.
* Define and enforce coding standards, implement static analysis, and maintain strong test coverage.
* Continuouslyrefactor and modularizelegacy components for clarity, reusability, and separation of concerns (e.g., following SOLID and DDD principles).
* Optimize backend performance andminimize stateful dependencies, keeping infrastructure stateless and horizontally scalable.
* Make strategic decisions arounddata modeling (MySQL, Couchbase, Clickhouse), caching (e.g., Redis), and request routing (e.g., via Nginx or FastCGI).
* Collaborate with the DevOps team to support deployment pipelines, manage environment configurations, and contribute to infrastructure-as-code (e.g. Ansible, Docker, low level Linux) to ensure reliable and scalable backend operations.
* Collaborate cross-functionallywith frontend, infra, and ML engineers to build consistent, reliable interfaces and shared abstractions.
Requirements
* 8+ years of backend development experience, withdeep expertise in modern, framework-free PHP.
* 1+ years experience with Symfony
* Demonstrated ability todesign backend architecturethat is clean, extensible, and easy to maintain over time.
* Strong command ofHTTP, session management, JWT, CSRF, and secure authentication patterns.
* Experience integrating withfrontend apps (SPA, SSR)andexternal/internal APIsin performance-critical environments.
* Familiarity withCI/CD workflows, containerized development (Docker), and monitoring/logging toolsis a plus.
* Passion for reducing complexity, eliminating redundancy, and keeping codebases lean and maintainable.
* This role is ideal for a backend architect who thrives in a minimalistic, high-ownership environment and can make deep technical decisions that shape how we build and scale. If you're driven by clarity, elegance, and performance—let’s talk.
Seniority level
* Seniority level
Mid-Senior level
Employment type
* Employment type
Full-time
* Industries
Software Development
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