Senior Full-Stack Engineer – AI SaaS (TS/Node/React, AWS)

Reviva | Deorganising Crime ™; Greater London; Hybrid; GBP 100,000 - 120,000; Full time

Benefits offered by this job

London hybrid

Job summary

Reviva | Deorganising Crime ™ in London is seeking a Senior Full Stack Engineer to own complex features across frontend and backend using TypeScript, Node.js, React, GraphQL and AWS. The role emphasizes reliability, AI‑assisted workflow and strong architectural thinking.

You will operate in a hybrid London setup with visibility into multi‑tenant SaaS concerns and impactful product ownership. This is a senior, hands‑on role with high ownership across delivery and architecture.

Qualifications

• Proven experience owning complex engineering problems in production.
• Strong TypeScript and Node.js experience in commercial product environments.
• Experience designing async workflows and multi‑tenant SaaS architectures.

Responsibilities

• Build full stack product features using TypeScript, Node.js, React, GraphQL and AWS
• Design backend services to support workflow automation, evidence collection and compliance
• Work with queues, background jobs, retries and idempotency for reliable processing
• Build integrations with customer systems and third‑party APIs
• Design for multi‑tenant SaaS environments with proper data boundaries and permissions
• Create React experiences that reflect backend state and async workflow status
• Improve observability with logging, metrics, tracing, alerts and diagnostics
• Help shape architecture decisions and production reliability practices
• Apply AI thoughtfully across product capability and engineering workflow

Skills

TypeScript

Node.js

React

GraphQL

AWS

Tools

GraphQL

AWS

Job description

Reviva | Deorganising Crime ™ in London is seeking a Senior Full Stack Engineer to own complex features across frontend and backend using TypeScript, Node.js, React, GraphQL and AWS. The role emphasizes reliability, AI‑assisted workflow and strong architectural thinking.

You will operate in a hybrid London setup with visibility into multi‑tenant SaaS concerns and impactful product ownership. This is a senior, hands‑on role with high ownership across delivery and architecture.