Senior PHP developer

Company Description

Runware is the fastest AI-as-a-Service platform for media generation

Runware is an AI-as-a-Service platforms that delivers real-time inference at 5–10 × lower cost than competitors. Our platform is purpose-built for speed & efficiency: custom GPU design, server setup, and datacenter architecture matched with performance-optimized software and a best-in-class API. Engineering teams who work with Runware save up to 80% on inference, improve response times, and scale instantly across 300K+ AI models, all through a single flexible API. Usage-based pricing and on-demand capacity are already battle-tested by Wix, OpenArt, NightCafe, Freepik, and thousands more. Backed by Insight Partners, a16z Speedrun, Begin Capital, and Zero Prime.

Join Runware to power the AI products that are changing the world

At Runware you’ll collaborate with the world’s leading AI teams, turning cutting-edge research into breakthrough products for thousands of clients. New models hit the market every week, and our job isn’t just to keep pace—it’s to stay two steps ahead, delivering unbeatable speed and performance every time.

That takes a special kind of teammate: driven, self-directed, lightning-quick to learn, and rock-solid reliable. If you thrive on building ambitious things with people who work hard, care for one another, and refuse to settle for “good enough,” you’ll feel right at home.

Resumés matter, but passion, grit, and proof of excellence matter more—whether you honed your skills at a in a research lab, at work, or taught yourself at 2 a.m. If that sounds like you, let’s talk.

About the Role

This is a full-time remote role for a Principal / Senior PHP Backend Developer. The successful candidate will be responsible for developing, testing, and debugging PHP applications, building and maintaining efficient, reusable, and reliable PHP code, and collaborating with cross-functional teams to design and implement new features and functionalities. Additionally, the role requires a person to write clean, SOLID, and easily maintainable code.

Responsibilities

• Design, build, and maintain efficient, reusable, and reliable PHP backend services and APIs
• Collaborate closely with React developers to architect and implement backend services that support our modern frontend stack
• Ensure code quality through unit testing, code reviews, and adherence to development best practices
• Work with RabbitMQ and implement asynchronous programming concepts to enable scalable, high-performance systems
• Optimize applications for speed and scalability, addressing performance bottlenecks and technical constraints
• Document architecture, workflows, and development processes to support team knowledge and onboarding
• Troubleshoot, debug, and upgrade existing systems, driving stability and robustness
• Work autonomously within a remote environment, maintaining clear and proactive communication across teams

• 10+ years of experience in PHP Backend Development
• Experience with RabbitMQ and asynchronous programming concepts.
• Expertise in designing and developing APIs, integrating with various DBs
• Excellent understanding of front-end development principles, able to cooperate closely with React developers on building the backend services for our Javascript frontend
• Obsession with unit testing, documentation, code health and scalability
• Experience with unit testing frameworks and code version control systems (e.g., Git).
• Bachelor's or Master's degree in Computer Science, Information Technology, or a related field.
• Excellent critical thinking and problem-solving skills, and passion for building high-quality software and driving continuous improvement
• Ability to work autonomously in a disciplined way, in a remote team environment. Maintaining tasks and tickets up to date, communicating clearly with stakeholders, etc.

We’re a remote-first collective, meeting in person twice a year to plan, brainstorm, celebrate wins, and enjoy some face-to-face time. We have core hours for cooperative working and calls, but outside of that your calendar is yours. Work the hours that let you perform at your peak while also building a healthy life.

Our release cycles are fast and intense, but they’re followed by real downtime. After big pushes we expect the team to unplug, recharge, and come back ready & stronger than ever for the next leap.

• Generous paid time off – vacation, sick days, public holidays
• Meaningful stock options – share in the upside you create
• Remote-first setup – work from home anywhere we can employ you
• Flexible hours – own your schedule outside core collaboration blocks
• Family leave – paid maternity, paternity, and caregiver time
• Company retreats – twice-yearly gatherings in inspiring locations