Front End Engineer React Senior / Lead

Client Server Limited; City Of London; Hybrid; GBP 81,000 - 99,000; Full time

Benefits offered by this job

Pension

Potential equity

Job summary

Client Server Limited in London is seeking a Front End Engineer capable of leading React-based development for our core product, a live events financial operating system. You will own the frontend architecture and drive performance across web apps.

You will mentor junior developers, collaborate with product, design and backend teams to deliver polished, accessible interfaces, and influence build and release pipelines while working in a hybrid London role with flexibility to work abroad part of

Qualifications

• You have experience as a lead or senior Front End Engineer / Developer, with advanced, hands-on skills in React
• You have a strong knowledge of modern JavaScript / TypeScript, component driven architecture and state management (e.g. Redux, Context API)
• You have experience building responsive, cross-browser, high-performance web applications at scale
• You’re comfortable taking ownership and making the technical decisions
• You’re keen to work in a start-up / scale-up environment, comfortable with ambiguity and changing priorities
• You have excellent communication and collaboration skills

Responsibilities

• Lead the architecture and development of front end applications, primarily using React
• Collaborate with product and design teams to translate requirements into polished, accessible interfaces
• Partner with backend engineers to integrate APIs, payment flows and real-time data
• Mentor more junior front end developers, conduct code reviews and ensure best practices
• Make critical technical decisions on front end tooling, architecture and build/release pipelines

Skills

React

JavaScript / TypeScript

Redux / State Management

Leadership / Mentoring

Front-end Architecture

Job description

Front End Engineer / Developer (React Senior / Lead) London / WFH to £90k

Would you like to join a scale-up technology company in an influential role where you can take ownership and see the business impact of what you do?

You could be progressing your career as a Front End Engineer, taking ownership of the Front End for the core product, a financial operating system for live events which reduces queue times for customers and maximises revenue for vendors.

As the lead Front End Engineer you will lead the architecture and development of front end applications, primarily using React, ensuring performance, maintainability and scalability across web products, remaining hands-on with the code.

You’ll collaborate closely with product and design teams to translate requirements into polished, accessible and responsive user interfaces and partner with backend engineers to integrate APIs, payment flows and real-time data.

You will have the autonomy to make critical technical decisions on front end tooling, architecture and build / release pipelines and mentor more junior front end developers, conducting code reviews and ensuring best practices.

Location / WFH:

Initially (first 6 months) you’ll be expected to join the team in the London office 3-4 days a week so you can get a full understanding of the product and the team, following this there’s lots of flexibility including the ability to work abroad for part of the year.

About you:

• You have experience as a lead or senior Front End Engineer / Developer, with advanced, hands-on skills in React
• You have a strong knowledge of modern JavaScript / TypeScript, component driven architecture and state management (e.g. Redux, Context API)
• You have experience building responsive, cross-browser, high-performance web applications at scale
• You’re comfortable taking ownership and making the technical decisions
• You’re keen to work in a start-up / scale-up environment, comfortable with ambiguity and changing priorities
• You have excellent communication and collaboration skills

What's in it for you:

• Salary to £90k
• Pension
• Influential role with great career progression as the company scales
• Potential equity