Job Specification – Full-Stack Prototyper
Job Summary
We are seeking a Full-Stack Prototyper to rapidly design and build proof-of-concept solutions that test and validate AI-driven ideas in the UK home-buying and mortgage market.
This role requires a hands-on engineer who is comfortable working across front-end, back-end, and data layers, with the ability to quickly assemble prototypes that demonstrate feasibility and value to both internal stakeholders and clients.
You will collaborate with Product Leads, Designers, Data Scientists, and Solution Architects to turn concepts into working demos, helping the organisation make informed build-versus-buy decisions and accelerate innovation.
This position offers the opportunity to work at the cutting edge of AI and digital transformation, shaping the direction of future products and services by proving what works in practice.
Key Responsibilities
* Rapid Prototyping
* Build quick, functional prototypes to test new AI concepts and workflows.
* Integrate APIs, AI services, and data sources to demonstrate end-to-end functionality.
* Iterate prototypes based on user and stakeholder feedback.
* Full-Stack Development
* Develop lightweight front-end interfaces for testing user interactions.
* Build back-end services to support prototypes, including data handling and business logic.
* Ensure prototypes are technically feasible for eventual scaling.
* Collaboration with Product and Design Teams
* Work closely with Product Leads and Designers to translate ideas into tangible solutions.
* Participate in design workshops and innovation sprints.
* Support Service Designers in visualising how prototypes fit into broader workflows.
* Technology Evaluation
* Explore and test emerging AI tools, frameworks, and platforms.
* Provide technical recommendations on buy vs build decisions.
* Document prototype learnings to inform the product roadmap.
* Handover and Knowledge Transfer
* Provide clear documentation and technical specifications for successful prototypes.
* Collaborate with engineering teams to transition validated concepts into production-ready builds.
* Share learnings with the broader organisation to accelerate innovation.
Key Skills and Qualifications
* Strong full-stack development skills across front-end (React, Angular, or similar) and back-end, Python, or equivalent).
* Experience building rapid prototypes and proof-of-concepts.
* Familiarity with integrating AI/ML services and APIs.
* Strong problem-solving and creative thinking skills.
* Ability to balance speed with technical feasibility.
* Strong collaboration skills with multidisciplinary teams.
Qualifications and Experience
* 4+ years' experience as a Full-Stack Developer, Prototyper, or similar role.
* Proven track record of quickly building and iterating prototypes in fast-paced environments.
* Experience working with AI frameworks, APIs, or LLMs desirable.
* Familiarity with BFSI, PropTech, or legal tech environments advantageous.
* Degree in Computer Science, Engineering, or related field preferred.
Job Type: Fixed term contract
Contract length: 6 months
Pay: £400.00-£550.00 per day
Work Location: In person