Senior Full-Stack Engineer - AI Startup - TypeScript/LLM - £120k - Fully Remote

Opus Recruitment Solutions; United Kingdom; Remote; GBP 120,000; Full time

Job summary

Join a forward-thinking AI startup as a Senior Full-Stack Engineer. This fully remote role focuses on leveraging TypeScript and Large Language Models (LLMs) to develop user-centric web applications. You'll design innovative features, optimize databases, and contribute to a unified codebase that enhances both SaaS capabilities and AI integration. Ideal candidates are experienced in working with robust tech stacks and are eager to push boundaries in web development and AI technology.

Qualifications

• Experience in full-stack development with integrated AI components.
• Proficiency in modern development frameworks and databases.
• Ability to work in a fast-paced environment with high-quality deliverables.

Responsibilities

• Design and develop features for SaaS and AI applications.
• Integrate and optimize AI/LLM technologies.
• Collaborate in full development lifecycle, from design to deployment.

Skills

TypeScript

React.js

Next.js

MySQL

tRPC

Prisma

AI/LLMs

LangChain

Job description

Senior Full-Stack Engineer - AI Startup - TypeScript/LLM - £120k - Fully Remote

Senior Full-Stack Engineer - AI Startup - TypeScript/LLM - £120k - Fully Remote

Opus Recruitment Solutions provided pay range

This range is provided by Opus Recruitment Solutions. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

Direct message the job poster from Opus Recruitment Solutions

I am currently recruiting on behalf of a forward-thinking technology company that is pioneering the integration of AI into B2B software solutions. We are seeking a highly skilled Senior Full-Stack Engineer with a strong foundation in TypeScript and a keen interest in working with Large Language Models (LLMs).

This role offers the opportunity to contribute to a unified codebase that supports both a robust SaaS platform and advanced AI capabilities. You will be involved in the full development lifecycle—from architectural design and database modelling to the integration of LLMs—helping to shape intelligent, user-centric features.

Key Responsibilities

• Design, develop, and maintain web application features using Next.js and TypeScript
• Contribute to a monorepo encompassing both SaaS and AI/LLM components
• Integrate and optimize LLMs (e.g., OpenAI, Gemini) through prompt engineering and API orchestration
• Implement multi-step AI workflows using frameworks such as LangChain
• Design and optimize relational databases, particularly MySQL
• Develop type-safe RPC endpoints using tRPC for seamless frontend-backend communication
• Rapidly adapt to a modern development stack and contribute to high-velocity feature delivery

Required Qualifications

• Demonstrated experience working within integrated codebases that include both application logic and AI/LLM components
• Proficiency in React.js, Next.js, tRPC, TypeScript, and Prisma
• Strong understanding of MySQL, including schema design and performance optimization
• Practical experience integrating with LLMs, including prompt design and API management
• Familiarity with orchestration tools such as LangChain or similar
• Ability to learn quickly and deliver high-quality features in a dynamic, fast-paced environment

Preferred Qualifications

• Experience deploying and fine-tuning custom AI models
• Background in developing B2B software platforms with multi-user functionality

If you are a driven engineer looking to work at the intersection of modern web development and AI innovation, I would be delighted to discuss this opportunity with you further

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Software Development

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