Senior Frontend Engineer

Slick; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Benefits offered by this job

25 days annual leave + bank holidays

Bring your dog to work

Company pension

Flexible working policy

Job summary

A leading tech startup in Greater London is seeking a Senior Frontend Engineer to build and improve web and mobile applications. In this hands-on role, you'll enhance features and focus on performance while collaborating with a skilled team. The ideal candidate will have proven experience with React Native, be adaptable, and able to work independently. A remote option is available with a flexible working policy and 25 days plus bank holidays leave.

Qualifications

• Proven experience improving performance of web applications.
• Experience building and maintaining mobile applications using React Native.
• Ability to work independently while collaborating closely with a frontend lead.

Responsibilities

• Build and enhance frontend features across web and mobile applications.
• Collaborate on architecture and technical decisions.
• Implement and maintain access control using AWS Cognito.
• Write and maintain unit and end-to-end tests.

Skills

Frontend architecture and state management

React Native

REST APIs

Automated testing

Collaborative work

Job description

At Slick, we’re transforming how salons and barbers run their businesses. Our smart booking platform and digital partner help industry professionals manage bookings, clients, and payments seamlessly.

While 65% of salons still rely on pen and paper, we’re bringing the beauty industry online - the way taxis, hotels, and restaurants already are. Since launching in 2019, over 8,000 UK professionals have used Slick to take millions of bookings, backed by partnerships with L’Oréal, Meta, and Stripe.

Role Summary

We’re looking for a Senior Frontend Engineer to work closely with our Frontend Engineering Lead to build and improve our web and mobile applications. This is a hands‑on role focused on delivering high‑quality features, improving existing functionality, and contributing to performance, testing, and overall frontend quality.

Key Responsibilities

• Build and enhance frontend features across web and mobile applications
• Collaborate with the Frontend Engineering Lead on architecture, technical decisions, and implementation
• Refactor and improve existing codebases to increase maintainability and readability
• Improve frontend performance and user experience
• Implement and maintain authentication flows using AWS Cognito
• Write and maintain unit tests and end‑to‑end tests (Playwright)
• Participate in code reviews and follow established frontend standards and best practices
• Work closely with backend engineers to consume APIs and deliver cohesive features

Required Skills & Experience

• Experience building and maintaining mobile applications using React Native
• Solid understanding of frontend architecture, state management, and component design
• Proven experience improving performance of web applications
• Experience working with REST APIs and collaborating with backend teams
• Experience writing and maintaining automated tests for frontend applications
• Ability to work independently while collaborating closely with a frontend lead

Nice to haves

• Experience with Stripe or payment‑related frontend integrations
• Familiarity with CI/CD pipelines (CircleCI or similar)

Why Join Us

You’ll be deeply involved in building and improving our frontend applications, with opportunities to tackle performance challenges, refactor legacy code, and influence technical decisions while continuing to grow as a senior engineer.

Come Build With Us (Without the Corporate Bloat)

We’re growing fast - but we’ve deliberately kept the startup energy that made us exciting in the first place.

At Slick, you’ll find a team that’s:

• Scrappy by design: We move fast, iterate quickly, and give you real ownership. You won’t be boxed into process for process’ sake.
• Built for senior talent: No pointless 1:1s or micromanagement. We hire people we trust to take initiative, make decisions, and ship.
• Autonomy‑first: You’ll have the space to propose ideas, solve meaningful problems, and actually see your work make an impact.
• Remote by default: Work where you’re most productive. We care about outcomes, not where your desk is.
• Globally diverse: Our fully remote setup means you’ll collaborate with a strong, international tech team bringing different perspectives to the table.
• 25 days + bank holidays annual leave + 1 extra day on your birthday
• Company pension
• Bring your dog to work 🐶
• Remote role or we have shared working space in central london (2 days a week) / home based with flexible working policy

Equal Opportunity Statement

At Slick, embracing diversity in all of its forms and fostering an inclusive environment for all people to do the best work of their lives with us.

We're an equal opportunity employer. All applicants will be considered for employment without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity status or disability status.