Senior Software Engineer Full Stack - Start-Up

Client Server; Greater London; Hybrid; GBP 85,000 - 95,000; Full time

Benefits offered by this job

WFH flexibility

London office visits

Job summary

Client Server is seeking a Senior Software Engineer / Full Stack Developer to design and build a modern cloud native platform using Node.js, TypeScript and React. The role combines backend API work with frontend development and cloud infrastructure, with ownership of architecture and delivery.

You will work closely with the CTO in a high-impact, AI-enabled environment, shipping secure, scalable solutions from London or remote locations with regular office visits.

Qualifications

• Strong full stack development experience with Node.js, TypeScript and React.
• Experience designing scalable APIs and cloud native applications.
• Experience setting up serverless architectures with modern cloud tools (Azure or AWS).
• Experience integrating enterprise systems and building event driven solutions.
• Familiarity with Infrastructure as Code and CI/CD pipelines.
• Experience using AI assisted development tools such as GitHub Copilot.

Responsibilities

• Design and build a modern cloud native platform from day one.
• Own backend services, APIs, integrations and cloud infrastructure.
• Contribute to frontend development and overall system architecture.
• Establish CI/CD pipelines, coding standards and security practices.
• Work with CTO on architectural decisions and high-impact delivery.
• Leverage AI development tools to accelerate delivery while shipping quality code.

Skills

Node.js

TypeScript

React

API design

Serverless architecture

CI/CD

Infrastructure as Code

AI-assisted development tools

Tools

Azure

AWS

GitHub Copilot

Job description

Senior Software Engineer / Full Stack Developer (Node TypeScript React) London / WFH to £95k

Are you a senior Software Engineer looking for a genuine Greenfield opportunity where you'll shape architecture from day one?

You could be joining a growing financial services business as they build a brand new product that will transform how financial advisers work. This is a high impact role within a small, experienced engineering team where you'll work directly with the CTO, influence technical decisions and see the immediate impact of your work.

As a Senior Software Engineer, you'll help design and build a modern cloud native platform, setting up serverless platforms from the ground up using Node.js, TypeScript, React and Microsoft Azure.

Working across the full technology stack, you'll take ownership of backend services, APIs, integrations and cloud infrastructure, whilst also contributing to frontend development. The platform will incorporate AI powered capabilities including meeting transcription, automated report generation and intelligent workflow automation.

You'll be hands-on, designing scalable APIs, building event driven integrations, developing Infrastructure as Code and establishing engineering standards, CI/CD pipelines and architecture alongside the CTO. Working in an AI first engineering environment, you'll use modern AI development tools to accelerate delivery while maintaining ownership of code quality, security and technical design.

Location / WFH:

You can work from home most of the time, meeting up with colleagues in the London office once or twice a week.

About you:

• You have strong Full Stack development experience with Node.js, TypeScript and React


• You have experience of designing scalable APIs and cloud native applications


• You have experience of setting up serverless architectures with modern cloud tools Microsoft Azure or AWS


• You have experience integrating enterprise systems and building event driven solutions


• You're comfortable working with Infrastructure as Code and CI/CD pipelines


• You have experience of using AI assisted development tools such as GitHub Copilot, Cursor or Claude


• You enjoy working in collaborative, start-up style environments with high levels of ownership

What's in it for you:

• Salary to £95k


• Impactful role with excellent progression as the company scales