Full Stack Software & AI Engineer

QX Labs is looking for a full stack AI engineer with a strong software background to join our expanding team of AI experts.

We are an early-stage London-based startup building cutting-edge workflow and data automation products for enterprises. Our flagship product, Quantera ( https : / / www.quantera.io / ) is a platform that transforms how financial firms and investment companies source deals and do research.

We're looking for a talented, product-minded AI engineer to join the team. You will be involved in building out our core products and will also play a pivotal role in developing new AI-powered products for our financial services customers. You will work directly with our founder, collaborating on product engineering, architecture, and execution. This is more than just a coding role; it's a chance to be a true builder in a dynamic startup environment, working at the forefront of applied AI.

This is a remote role with the flexibility to work full-time or part-time / contract with a view to transitioning to full-time in future.

Your responsibilities

Collaborate closely with our founder on the technical development of the Quantera platform, as we productise new AI-powered tools and capabilities

Design, develop, test, and deploy robust, scalable full-stack applications using Python, JavaScript (React / Next.js), and modern AI technologies

Architect and implement solutions leveraging LLMs and their surrounding ecosystem (e.g., multi-agent systems, RAG, vector DBs, fine-tuning techniques)

Actively research, experiment with, and integrate the latest AI advancements into our products, and proactively suggest improvements to enhance our generative AI capabilities

Contribute to building the foundations of our engineering practices and infrastructure

Implement strong testing and CI / CD practices that help us move with confidence in our AI system development

Help shape the future product direction of QX Labs by exploring and prototyping new ideas

Is this you?

Bachelor's or Master's degree in Computer Science, Engineering or equivalent practical experience

3+ years of professional experience in software engineering and AI / ML development.

Strong technical foundation in Python and experience with modern web frameworks

Frontend expertise with JavaScript frameworks, particularly with React and Next.js, building intuitive user interfaces

AI enthusiast & practitioner , comfortable working with LLMs and related tools with a portfolio to demonstrate this

AI ecosystem awareness – you have a genuine passion for applied AI and ML, actively follow the latest research, models, and tools, and can thoughtfully discuss their applications

Product-oriented mindset – you care about the 'why' behind what you're building and are focused on delivering user value

Able to articulate complex technical concepts clearly

Able to work independently and effectively in a small, tight-knit team

Preferred skills

Experience building scalable applications with LLMs using frameworks such as LangChain, HuggingFace etc.

Depth of knowledge with RAG implementation and improvements

Experience with database technologies (SQL, NoSQL, Vector DBs)

Experience with DevOps practices and CI / CD pipelines

About the Founder

You'll be working directly with Jai, the founder of QX Labs. Jai brings a unique blend of technical and business experience. He started his career as a software engineer at a social analytics startup which was acquired in 2014. Subsequently, he was a management consultant at BCG, and in 2019 co-founded Seek Ventures, a global investment firm where he has deployed over $500m into software and internet businesses. Jai graduated top of his class in Engineering, Economics & Management from Oxford University.

Interested?

If you're excited by the challenge of building intelligent enterprise products and want to make a foundational impact at an early-stage AI startup, we'd love to hear from you.