Senior Software Engineer – Web App, DevEx

🕒 September 3

🌐 United Kingdom, France, +4 more countries – Remote

🇬🇧 United Kingdom – Remote 🇫🇷 France – Remote 🇩🇪 Germany – Remote 🇪🇸 Spain – Remote 🇸🇪 Sweden – Remote 🇧🇪 Belgium – Remote

⏰ Full Time

🟠 Senior

💻 Frontend Engineer / Web Developer

👻 Ghost score 56%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Runware

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2023

🤖 Artificial Intelligence

🔌 API

📱 Media

Artificial Intelligence • API • Media

Runware is a flexible generative AI platform that specializes in high-quality media creation for images and videos through an affordable and fast API. It is capable of advanced tasks such as image generation, video inference, upscaling, and background removal, making it an essential tool for developers seeking to enhance their projects with AI technology. Powered by a custom Sonic Inference Engine™ and renewable energy, Runware ensures quick and efficient media generation without requiring complex infrastructure or machine learning expertise.

📋 Description

• Build and maintain internal and developer-facing APIs and services powering Runware’s Web App and developer experience • Develop and evolve public API functionality, including task types, validation, routing, and WebSocket/REST behavior • Own and maintain the Admin API and panel as an internal platform • Work with usage, billing, and customer data, including Stripe, to ensure accuracy and reliability • Investigate and resolve production issues and security vulnerabilities affecting the Web App and APIs • Write, test, and review clean, maintainable code • Work with Product, Design, and Engineering to clarify requirements, identify dependencies, and define technical solutions • Contribute to technical decisions and work across frontend/backend boundaries where appropriate • Collaborate with the wider Backend team on specialist knowledge and shared systems • Take ownership of backend work from requirements and technical constraints through implementation and delivery

🎯 Requirements

• Strong experience building backend systems and APIs • Strong programming experience in one or more backend languages, with ability to learn and work effectively in new languages and technologies • Experience building reliable, maintainable, well-tested production systems • Good understanding of API design, asynchronous workloads, and distributed systems concepts • Strong engineering fundamentals in security, reliability, and performance • Strong communication and collaboration skills across Engineering, Product, and Design • Strong ownership and autonomy, with good judgment about when to involve others • Comfortable using AI-assisted development tools and agents while maintaining responsibility for code quality, security, and correctness • Nice to have: experience with PHP, Symfony, and/or Doctrine • Nice to have: experience with WebSockets • Nice to have: experience building public APIs or developer-facing products • Nice to have: experience with usage-based billing, credits, or financial data • Nice to have: experience contributing to architectural decisions and mentoring engineers

🏖️ Benefits

• Remote-first collective; in-person meetings twice a year • Core hours for cooperative working and calls, with flexible scheduling outside core hours • Generous paid time off, including vacation, sick days, and public holidays • Meaningful stock options • Remote-first setup; work from home anywhere the company can employ you • Flexible hours • Paid maternity, paternity, and caregiver leave • Twice-yearly company retreats • Post-release and milestone time to unplug and recharge