Senior Full-Stack Engineer (AI Platform)

pair • United Kingdom

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AI Summary

Lead end-to-end development of an AI-powered learning platform, shaping frontend/backend architecture, engineering standards, and technical direction. Own product areas, deliver high-quality features, and collaborate with Product/Design to drive adoption. Requires full-stack expertise with modern frameworks, AI-native workflows, and a bias toward technical excellence.

Key Highlights

Own end-to-end product delivery across frontend, APIs, data, and integrations for an AI-powered platform

Set engineering standards, architecture, and technical direction for a growing SaaS product

Collaborate closely with Product, Design, and leadership to ship high-quality, user-centric AI features

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Key Responsibilities

Build and own full-stack features connecting AI-powered flows, learning content, authentication, and core platform components

Design and implement frontend/backend architecture, API standards, and data models for scalability and reliability

Set technical standards for testing, maintainability, and performance while improving platform quality as usage grows

Partner with Product, Design, and Engineering leadership to translate customer needs into robust, high-quality functionality

Ensure rapid delivery of AI-native features without compromising technical excellence or user experience

Technical Skills Required

JavaScript Python SQL

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Benefits & Perks

Equity for all employees

25 days paid holiday plus bank holidays

Access to AI tools and internal masterclasses

Hybrid work (1 day in London office weekly)

Company-wide in-person Anchor Weeks (7x/year)

Visa sponsorship for exceptional candidates

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Nice to Have

Vue 3 and TypeScript

FastAPI, Celery, and Postgres

Azure/GCP cloud platforms

Multi-tenant SaaS systems

Startup or small product team experience

Job Description

Department: Engineering

Location: London

Compensation: £81,000 - £97,000 / year

PAIR is a fast-growing AI adoption startup on a mission to help professionals and teams harness AI to do their best work. Our platform delivers personalised, AI-powered learning experiences and adoption support that help organisations rapidly harness AI at scale.We already have strong traction:

15,000+ users
Enterprise deployments with organisations including PmC, the Ministry of Justice, you.com and The MTC
£1.8M+ ARR run-rate
Backing from investors including Seedcamp, Venrex, Tom Hulme (Google Ventures) and Steve Garnett (ex-Chairman EMEA, Salesforce)

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