I’m working with an exciting AI software company based in London that’s at the forefront of prompt engineering and Large Language Model (LLM) innovation. They’re building cutting-edge solutions that redefine how businesses interact with AI, and they’re scaling quickly.

The team currently sits at around 20 people, and they’re looking for a Senior Software Engineer to join them as they grow. This is a fantastic opportunity to work in a collaborative, tech-first environment where your ideas will have a direct impact on next-generation AI products.

As a Senior Software Engineer, you’ll play a key role in designing and building scalable AI-driven applications. You’ll work closely with AI specialists and product teams to integrate LLMs, optimize prompts, and deliver robust solutions.

Key Responsibilities:

Develop and maintain systems using Python and TypeScript.
Collaborate on prompt engineering and model fine-tuning.
Design APIs and user-facing features for AI-powered products.
Contribute to technical strategy and mentor junior engineers.

What They Offer

Impactful Work: Your contributions will shape next-gen AI products.
Career Growth: Opportunities to lead projects and specialize in cutting-edge AI.
Collaborative Culture: Flat structure, open communication, and a strong learning ethos.
Tech-First Environment: Modern stack, cloud-native infrastructure, and continuous innovation.
Flexibility: Hybrid working model with a vibrant London office.

Ideal Candidate

Strong experience with Python and TypeScript.
Hands-on expertise with LLMs (OpenAI, Hugging Face, or similar).
Proven ability to design scalable systems and mentor others.
Passion for AI and curiosity about prompt engineering.
Comfortable in a growing, startup-style environment.

La Fosse

New Jobs

Senior Software Engineer – AI & Prompt Engineering - £100k - Python/ TypeScript