Frontend Engineer

Harnham - Data & Analytics Recruitment; City Of London; Hybrid; GBP 70,000 - 80,000; Full time

Benefits offered by this job

Bonus

Benefits package

Autonomy & leadership exposure

Career development

Job summary

Harnham – Data & Analytics Recruitment is seeking a Frontend Engineer in London (Hybrid). You’ll help shape the front-end experience of a data-heavy, AI-powered platform, building complex UI with React and TypeScript.

The role offers ownership, exposure to leadership, and a collaborative engineering culture. Join a well-funded AI software business at a pivotal growth stage with autonomy, career development, and a modern London office.

Qualifications

• Proven experience building React/TypeScript front-ends for enterprise SaaS products.
• Track record delivering data-heavy dashboards and analytics interfaces.
• Strong skills in performance, security, and scalable front-end architecture.

Responsibilities

• Build and enhance complex front-end apps using React and TypeScript.
• Develop data-heavy dashboards and workflow-driven UIs.
• Create responsive, accessible interfaces for AI-powered features.
• Collaborate with product, design and engineering to ensure quality.

Skills

React & TypeScript

Enterprise software

State management

Frontend architecture

Frontend testing

CI/CD

AI-assisted tools

Product-minded

Tools

Cursor

Claude Code

CI/CD tooling

Job description

Frontend EngineerLondon (Hybrid, minimum 3 days in office) £70,000-£80,000 + Bonus + Benefits

This is an opportunity to join a well-funded AI software business at a pivotal stage of growth. You'll help shape the front-end experience of a sophisticated platform used to manage complex workflows, data-rich processes, and AI-powered decision making. Working within a small, high-calibre engineering team, you'll have significant ownership, direct exposure to leadership, and the chance to influence both product and technical direction. The CompanyThey are building an AI-powered enterprise platform that helps organisations work more efficiently with complex data, workflows, and decision-making processes. Their technology combines proprietary information, external data sources, and AI capabilities into a secure, scalable product used in highly demanding environments.Backed by an established international business with deep domain expertise, they are investing heavily in product and engineering growth. The team operates in a collaborative, high-ownership environment where engineers play a key role in shaping the product's future.

• Build and enhance complex front-end applications using React and TypeScript.
• Develop data-heavy dashboards, analytics tools, and workflow-driven user experiences.
• Design intuitive interfaces for AI-powered features and agent-based workflows.
• Create responsive, performant, and accessible user experiences for enterprise users.
• Contribute to shared component libraries and scalable front-end architecture.
• Collaborate closely with product, design, and engineering stakeholders.
• Implement robust testing practices and maintain high standards of code quality.
• Optimise application performance, scalability, and front-end security.

Your Skills & Experience

You will have:

• Strong commercial experience building applications with React and TypeScript.
• Experience developing complex enterprise software, SaaS platforms, or data-rich products.
• Expertise in state management, front-end architecture, testing, and performance optimisation.
• Understanding of front-end security principles and best practices.
• Experience working within cloud-based development environments and modern CI/CD processes.
• Regular use of AI-assisted development tools such as Cursor, Claude Code, or similar.
• A product-focused mindset with a passion for delivering high-quality user experiences.

Desirable experience includes:

• React Native development.
• AI-powered or agentic product development.
• Design systems, theming frameworks, or micro-frontend architectures.
• Financial or data visualisation products.

What They Offer

• Competitive salary, bonus, and benefits package.
• The opportunity to help build a cutting-edge AI platform from an early stage.
• High levels of autonomy, ownership, and technical influence.
• Direct access to senior leadership and decision-makers.
• Clear opportunities for career development as the engineering function grows.
• Modern London office environment with a collaborative engineering culture.