Senior Full Stack Engineer - Python & FastAPI

Sourceful is looking for Senior Fullstack Engineer with a strong foundation in building scalable core systems and enough frontend know-how to help build a seamless, AI-enabled product that empowers millions to turn ideas into reality., * Own and deliver scalable core systems while collaborating closely across the stack to ensure seamless frontend experiences.

• Design, build, and maintain systems and APIs that power Sourceful's AI-driven design tools
• Shape APIs that are clean, scalable, and easy for frontend and external developers to use
• Optimize system performance and reliability across the stack
• Understand how to solve spiky traffic challenges includes queues, rate limits and auto-scaling
• Collaborate closely with design and frontend teams to ship fast and iterate often
• Tackle complex technical challenges, from prompt chaining to real-time rendering

Technical Skills

• 5+ years of Fullstack and specialised in core systems engineering experience
• Tech stack: Strong proficiency in Python and backend frameworks (FastAPI, Flask, Django, etc.)
• Intentionality with AI/dev tools (e.g., Copilot, Cursor, Devin) and when to override them
• Proven ability to own and deliver complex features end-to-end
• Startup or high-growth environment experience preferred

Soft Skills

• Systems thinker who values clarity, simplicity, and performance
• Sharp design sensibility and obsessive attention to detail
• Fast, autonomous builder who thrives in ambiguity
• Strong communicator who enjoys sharing work and mentoring others
• Mission-aligned: Passionate about solving hard problems with elegant, intuitive interfaces

Sourceful is a technology company headquartered in Manchester, England. Its platform helps brands design logos, shelf-ready packaging and visual assets across sectors including food and beverage, beauty, electronics, fashion, and home. Sourceful's agentic platform guides users from ideation to print-ready artwork files that can be sent directly to suppliers. Sourceful's users come from design and non-design backgrounds. Sourceful has also developed a state of the Image Generation and Editing model, Riverflow, which is a multi-purpose model that can be used by developers via API. The company is backed by Index Ventures, Coatue Management, and Eka Ventures., What You'll Get * Building a World-class Product with a small but mighty A-player team * Mentoring and coaching from Cofounder & CEO * Access to latest AI tools for coding * Pension Plan and Private Health Insurance * 25 vacation days per calendar year * Performance Bonuses * Work arrangement: Hybrid, avg. 3 days/week in our lovely Hub in Manchester Central