Senior Full Stack Engineer - TypeScript, LLMs

JR United Kingdom; Chelmsford; Remote; GBP 50,000 - 85,000; Full time

Job summary

A fast-growing AI start-up is seeking a Senior Full Stack Engineer to join their team and contribute to innovative B2B software solutions. This role involves full feature lifecycle development, working with technologies such as TypeScript, Next.js, and AI integrations. This position offers the chance to shape cutting-edge products in a dynamic work environment as part of a fully remote team.

Qualifications

• Experience with Next.js, tRPC, TypeScript, Prisma.
• Strong database skills ideally with MySQL.
• Hands-on experience integrating AI models (e.g., ChatGPT, Gemini).
• Familiarity with LangChain or similar orchestration tools.

Responsibilities

• Develop and maintain web applications using TypeScript, React, Node and Next.js.
• Contribute to a monorepo encompassing B2B SaaS and AI modules.
• Optimise MySQL databases for performance and scalability.

Skills

TypeScript

React

Node.js

Next.js

MySQL

AI integration

tRPC

Prisma

Job description

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Senior Full Stack Engineer - TypeScript, LLMs, chelmsford

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Client:

Oliver Bernard

Location:

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

8

Posted:

06.06.2025

Expiry Date:

21.07.2025

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Job Description:

Senior Full Stack Engineer - TypeScript, LLMs

Fully Remote - UK based

Oliver Bernard have partnered with a growing AI start-up who have recently secured another round of funding, and are now looking for talented Senior Full Stack Engineers to shape the product and company from the ground up.

We are looking for a Mid Level Engineer to join our client's dynamic product team. This is an incredible opportunity to work with cutting-edge AI technologies and drive innovation in B2B software solutions.

Role Overview:

As a Senior Full-Stack Engineer, you will contribute to a unified codebase powering both B2B platforms and custom AI integrations. You'll be involved in the full feature lifecycle, from design and development to optimising AI-driven user experiences.

Key Responsibilities:

• Develop and maintain web applications using TypeScript, React, Node and Next.js.
• Contribute to a monorepo encompassing B2B SaaS and AI modules.
• Integrate Large Language Models (LLMs) like OpenAI and Gemini through prompt engineering.
• Optimise MySQL databases for performance and scalability.
• Build type-safe RPC endpoints with tRPC and TypeScript.

Requirements:

• Experience with Next.js, tRPC, TypeScript, Prisma.
• Strong database skills ideally with MySQL.
• Hands-on experience integrating AI models (e.g., ChatGPT, Gemini).
• Familiarity with LangChain or similar orchestration tools.
• Fast learner, adaptable in high-paced environments.

Preferred Skills:

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