Senior Full-Stack Engineer: Build Scalable AI SaaS

Aguru; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Job summary

Aguru is hiring its first Senior Full Stack Engineer to own critical parts of the product architecture across the stack, delivering scalable and user-friendly features.

You'll collaborate with product, design and AI engineering to implement Next.js features, APIs, and data models in Supabase, while integrating AI tools to automate workflows.

The role emphasizes reliability, security and performance within a fast-moving, collaborative environment in the United Kingdom.

Qualifications

• 5+ years of professional full-stack development experience.
• Strong React and Next.js expertise.
• Proficiency in TypeScript.
• Experience with PostgreSQL/Supabase and ORMs.
• Knowledge of API design and modern state management (TanStack Query).
• Understanding of authentication/authorization flows.
• Experience with automated testing and debugging complex workflows.

Responsibilities

• Design, build, and maintain core application features in Next.js.
• Develop robust APIs and server components.
• Work on Supabase (PostgreSQL) data models, queries, and role-based access policies.
• Implement responsive, accessible, and maintainable UIs with React, Tailwind CSS, and shadcn/ui.
• Integrate with AI and automation frameworks (Mastra, Vercel AI SDK, OpenAI, Google Gemini, Playwright).
• Ensure reliability, security, and scalability of the platform.

Skills

React

Next.js

TypeScript

PostgreSQL / Supabase

ORMs

API design

State management (TanStack Query)

Authentication/Authorization

Automated testing

AI/LLM integrations

SaaS / workflow automation

OpenAI

Tools

Supabase

PostgreSQL

Mastra

Vercel AI SDK

OpenAI

Google Gemini

Playwright

Job description

Aguru is hiring its first Senior Full Stack Engineer to own critical parts of the product architecture across the stack, delivering scalable and user-friendly features.

You'll collaborate with product, design and AI engineering to implement Next.js features, APIs, and data models in Supabase, while integrating AI tools to automate workflows.

The role emphasizes reliability, security and performance within a fast-moving, collaborative environment in the United Kingdom.