About Sourceful
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.
About the Role
Sourceful is looking for a Senior Fullstack Engineer with a strong foundation in scalable core systems, deep Python experience, and enough frontend fluency to help craft a seamless, AI-enabled product. You’ll work close to our emerging AI features, shaping services that carry real-world load and help millions turn ideas into reality.
Key Responsibilities
* 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
Qualifications
Technical Skills
* 5+ years of engineering experience in core systems engineering experience
* 4+ years of hands-on Python experience, including production systems you owned end-to-end
* Professional experience with FastAPI in production, ideally supporting 10k+ users or comparable load
* Comfortable working close to ML/AI features and integrating with model-driven services
* Intentionality with AI/dev tools (e.g., Copilot, Cursor, Devin) and when to override them
* Proven ability to deliver complex features autonomously in ambiguous, high-growth environments
* Nice to have: experience with GPUs, model fine-tuning, or applied Transformer-model workflows
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
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