20 Front End Engineers jobs in London

About Us:

We’re a VC-backed stealth-mode company building behavioural AI solutions for the retail industry. Our platform is designed from the ground up — no legacy, no patchwork systems — just a clean slate and a clear vision. Our mission is to bring the intelligence of modern machine learning directly to the in-store shopping experience.

Role:

We’re looking for an experienced Frontend Engineer to work closely with product, design, mobile, and machine learning team members to design & build experiences that re-define retail shopping. You'll help help build engaging & intuitive web experiences using highly responsive UI components and real-time data flows.

Responsibilities:

• Design and implement reactive, real-time web interfaces that help manage & redefine what is possible with in-store content personalisation
• Understand & advocate for user needs/wants
• Translate user and business needs into functional frontend code
• Contribute to API and broader system design & documentation

Essential Qualifications:

• Strong understanding of UX principles and web design fundamentals
• Expert in Javascript, Typescript, HTML, and CSS
• Extensive experience with modern web frameworks and patterns (eg. React, Next.js, Tailwind)
• Experience with real-time and bi-directional communication protocols and patterns (eg. WebSockets, SSE)
• Built and deployed services on any major cloud providers' services (Azure, GCP, AWS)
• AI-Native development: fast iteration & prototyping using AI tools such as Lovable, Bolt, or Cursor as a collaborator.

Nice to Have:

• Some experience in backend development (Python/Java/Go)
• Experience with container orchestration and service containerisation (Kubernetes, Docker)
• Worked in an IoT or Edge-oriented architectures
• Experience or knowledge in retail POS, inventory, or loyalty systems

The role

We're looking for a Senior Engineer to join our Research and Trade DX team in London.

Sitting within the Basecamp Technology group and providing specialised engineering capabilities and scalable components to our Research and Trade Technology groups, this is an impactful role that will require you to design, build and operate scalable solutions that enhance the developer experience across our entire organisation.

You will play a key role in defining and implementing the team's technical direction, working in close collaboration with engineering teams across the organisation to build out our best-in-class tooling. You'll own features end-to-end, raise the bar for code quality and shorten idea-to-production cycles.

Key responsibilities of the role include:

• Creating intuitive web experiences by building and evolving Backstage plugins and other React applications
• Designing and operating scalable TypeScript and back-end services on Linux and K8s
• Embedding unit, integration and end-to-end tests and managing automated CI/CD pipelines, using GitHub, Jenkins and Argo CD
• Taking full operational responsibility for the components you create, including on-call participation and post-incident reviews
• Mentoring junior engineers, sharing knowledge through code reviews and tech talks, and fostering continuous learning within the team

Identifying workflow friction, prototyping solutions quickly and iterating with stakeholders across the organisation.

Who are we looking for?

The ideal candidate will have the following skills and experience:

• Proven production experience delivering end-to-end systems with React, TypeScript and
• Practical knowledge of Backstage, including plugin development, software catalogue and TechDocs
• Ability to design highly available distributed architectures with clear scalability, resilience and cost considerations
• Familiarity with Kubernetes, Terraform and observability stacks
• Experience integrating and securing services on a major public cloud provider
• Self-directed and confident in leading architecture discussions or small technical initiatives
• Clear, concise written communication and the habit of producing design docs and RFCs that influence cross-team decisions
• Enthusiasm for developer experience with a focus on measurable productivity uplift
• History of mentoring junior engineers and cultivating an inclusive, high-trust culture

Why should you apply?

• Highly competitive compensation plus annual discretionary bonus
• Lunch provided (via Just Eat for Business) and dedicated barista bar
• 30 days' annual leave
• 9% company pension contributions
• Informal dress code and excellent work/life balance
• Comprehensive healthcare and life assurance
• Cycle-to-work scheme
• Monthly company events

Founding Frontend Engineer (React / TypeScript)

We’re building the operating system for experience-led businesses — helping teams manage bookings, resources, customers, and payments in one place.

Our mission: make it effortless for operators to run what they love.

We’re product-led, customer-obsessed , and move fast — small, high-trust, and ambitious.

London-based | Hybrid (3 office days)

What You’ll Do

• Build and ship features end to end — from idea to production
• Work closely with design, product, and backend teams
• Create high-performance, accessible interfaces
• Shape our component library and design system
• Influence product direction and engineering culture

About You

• 5+ years of frontend experience
• Expert in React, TypeScript, HTML, CSS, modern JS
• You’ve taken products from 0 → 1
• Strong problem-solving and debugging skills
• Communicative, curious, and thrive in fast-moving teams

You’ll love it here if you’re hands-on, proactive, and impact-driven — someone who loves building, not just maintaining.

Why Join

• Shape a product used by real-world businesses every day
• Be part of an early, high-trust team with big ambitions
• Earn meaningful equity alongside competitive pay
• Enjoy 30 days holiday + birthday off , flexible hours, and free gym access
• Dedicated time for open-source projects
• £75,000–£100,000 + equity
• Hybrid (London)

About the Job

Senior Frontend Engineer – London (Victoria) | Hybrid

£80k - £10k

Are you ready to craft the next generation of data-driven digital experiences for one of Europe’s most technically advanced SaaS innovators?

Our client, a pioneer in B2B SaaS solutions , is building “Your Shipping Analytics Supercomputer” , providing cutting-edge data visualisation and dynamic dashboards for high-velocity business & artificial intelligence.

About the Role

As a Senior Frontend Engineer , you’ll be at the heart of a high-performing engineering team, building intuitive, high-impact web applications that bring complex data to life. Working with cutting-edge technologies like React and TypeScript , you’ll collaborate closely with product, design, and data science teams to shape interfaces that define the future of shipping intelligence.

This is a hands-on technical role that blends creativity, collaboration, and engineering excellence, ideal for someone who thrives in fast-paced, high-growth environments.

What You’ll Bring

• 5+ years of front-end development experience building large-scale web applications.
• Expertise in React, TypeScript/JavaScript, HTML, and CSS .
• A strong appreciation for UI/UX design and a passion for delivering exceptional user experiences.
• Understanding of Design Patterns and SOLID principles .
• Experience building and consuming RESTful APIs .
• Familiarity with Agile/SCRUM methodologies and modern CI/CD practices.

Why Join?

• Bootstrapped success story - with multiple thriving business arms.
• An executive team with 65+ years of collective experience in shipping management.
• Fresh from a £100m AI sta -up exit , they’re focusing all their attention on this next big venture.

This is an outstanding opportunity to design and deliver the front-end of a platform that’s redefining how businesses interact with data.

If you’re a passionate engineer who loves solving complex problems through clean, intelligent design — let’s connect!

This is hybrid role, with two days in our London office every week.

We’re looking for an experienced Frontend Engineer to take on a key role shaping our web products.

Since its launch in 2018, Gener8 has been at the forefront of the “open data” movement: the belief that people should be able to control and be rewarded from their own data. Gener8’s consumer products include a web browser, browser extension, IOS and Android apps. Our products enable people to transparently and willingly share their data with Gener8, whilst preserving their privacy, so that we can create value from it for them.

We are growing fast. With tens of thousands new app downloads every month. Every month our desktop browser racks up the equivalent of 250 yrs in time spent browsing on it. As you can imagine, we have huge amounts of proprietary data which we can create value from.

Gener8 was named ‘Disruptor of the year’ in 2022 by the Great British Entrepreneur Awards. Our investors include 3 Dragons from BBC’s Dragon’s Den as well as personalities such as the rap star Tinie Tempah, former football manager Harry Redknapp and cricketer Chris Gayle to name a few. In 2023 we met with the Prime Minister at Downing street and were invited to become a member of the Government’s new “Smart Data Council”, shaping the future of data legislation in the UK. We also regularly engage with European legislators on the Digital Markets Act which empowers users to control and earn from their data.

You’ll be working on our core consumer web products across desktop and mobile, with your work at the very front of the interactions our users have with our product every day.

A few of the things in our backlog that you could be working on:

• Creating a new onboarding flow for our desktop browser extension.
• Adding new data sources that allow users to earn from their data.
• Working on our rewards platform where users can exchange their earnings for real life rewards

Our web products use React, Next.js and plenty of good old Vanilla JS. On the backend we use Golang to serve RESTful and gRPC APIs running on Kubernetes. We use GitHub for CI and version control, Jira for tracking tasks and Slack for sending cat GIFs.

• Being hands on with development of our website, extensions and admin
• Developing new features, modifying existing ones and fixing bugs as they arise
• Writing automated tests to keep the quality of our products high
• Working closely with our app engineers to deliver integrated product features
• Work closely with the product team to refine new features and user interfaces

Requirements

This is the right opportunity for you if you have:

• 5+ years commercial frontend web development experience using React
• A strong grasp of CSS and JavaScript fundamentals
• Experience making API driven web apps in production environments
• Experience building UIs that surprise and delight users
• Excellent verbal and written English communication skills
• British citizenship or a pre-existing right to work in the UK

Benefits

JustPark is the premier partner offering both B2B solutions for destinations and B2C services for drivers, giving us the best of both worlds. We simplify the entire parking experience. From venues and councils to private driveways, our platform makes it simple for drivers to find, book, and pay for parking—while empowering our operating partners to deliver exceptional parking experiences.

We’ve always believed parking should be easier—from end to end. That’s why we, two trailblazing companies—ParkHub and JustPark—have come together to make that vision a reality. 

ParkHub revolutionized event parking in the US., optimizing venue operations for a smoother, stress-free experience. JustPark transformed parking in the UK, turning the hunt for a spot into a simple, seamless task.

Now, as one unified company, we’re combining expertise to offer a full-service, frictionless parking solution for both businesses and consumers.

The Lead Frontend Engineer is responsible for leading and evolving the frontend engineering strategy across JustPark's web platforms. The position involves technical leadership of the frontend engineering squad, architectural oversight, and ensuring high-quality delivery of frontend solutions that serve millions of users globally across our customer-facing applications, internal tools, and client portals.

To give you more of an idea of the kind of projects you'll be leading, here are initiatives similar to what our frontend teams deliver:

• Leading the internationalisation and white-labelling of products to support customers in multiple countries
• Overseeing the evolution and adoption of our reusable component library across multiple projects
• Architecting new customer service tools, internal platforms and delivering new features in our customer environments
• Driving frontend performance optimisation initiatives to improve conversion rates
• Leading the migration and modernisation of legacy frontend systems
• Establishing comprehensive testing strategies and improving code coverage
• Coordinating frontend architecture decisions with mobile and backend teams

• Lead and mentor a squad of 3 frontend engineers across multiple web platforms
• Drive technical excellence and best practices in frontend development
• Architect and oversee the implementation of new features across customer-facing and internal applications
• Balance maintenance of existing systems with innovation in new features and platforms
• Collaborate with product, design teams, and other engineering squads to deliver exceptional user experiences
• Establish and maintain technical standards for frontend development
• Drive continuous improvement in application performance, stability, and user satisfaction
• Oversee deployment processes and coordinate with stakeholders
• Guide the technical roadmap for frontend applications
• Lead initiatives for platform consolidation and component library standardisation

• Drive innovation in frontend development practices and emerging technologies
• Contribute to broader technology strategy and architectural decisions
• Build relationships with Product, Design, and other key stakeholders across the business
• Identify and develop future technical leaders within the frontend team
• Stay current with frontend development trends and emerging technologies to continuously improve the development process and application functionality
• Lead cross-platform collaboration and knowledge sharing initiatives

Requirements

• 5+ years of experience in software development with strong focus on frontend engineering
• Strong technical background in React and modern JavaScript/TypeScript ecosystem
• Proven experience leading and mentoring engineering teams in an agile environment
• Strong understanding of frontend architecture patterns and best practices
• Deep knowledge of React, Redux (including Redux Toolkit), Next.js, and modern build tools (Webpack, Vite)
• Experience with server-side rendering (SSR) and static site generation (SSG)
• Strong understanding of internationalisation (i18n) and localisation practices
• Experience with component library development and design system implementation
• Knowledge of frontend testing strategies (Cypress, Jest, React Testing Library, Storybook)
• Previous experience with CI/CD pipelines for frontend applications (Jenkins, GitHub Actions)
• Understanding of web performance optimisation and core web vitals
• Strong problem-solving skills and attention to detail
• Experience with monorepo management and tooling (Yarn workspaces, Turborepo, or similar)
• Familiarity with accessibility standards (WCAG) and best practices

• Experience working with distributed teams across different time zones
• Knowledge of international payment systems integration on the frontend
• Experience scaling frontend applications for international markets
• Previous experience in the parking or mobility sector
• Experience with GraphQL and modern API integration patterns
• Knowledge of micro-frontend architectures
• Experience with advanced performance monitoring and observability tools

• Opportunity to shape the frontend strategy for a rapidly growing international company
• Increasing involvement in strategic technical decision-making
• Development of broader technology leadership skills
• Experience in managing/mentoring frontend engineers in multiple regions
• Opportunity to influence frontend development practices across the organisation
• Potential progression into Principal Frontend Engineer or broader engineering leadership roles

Benefits

Recharge your batteries

• Generous holiday policy: 25 days + bank holidays + managers have the ability to grant up to 5 extra days for high performance (total of 38 days a year)
• Free lunch on all office days via Feedr with the option to choose your preferred meal or cuisine everyday
• Free snacks & drinks on all office days

Investment in you and your wellbeing

• Private Medical Insurance with Vitality
• Life assurance through YuLife
• £25 credit to use for eye tests a year
• Free O2 concert tickets through our partnership with the O2

Simplifying journeys so you can breathe easier

• £50 parking credit per month to use via JustPark
• Cycle-to-work salary sacrifice scheme
• EV salary sacrifice car scheme via Octopus Energy

We look out for your family

• Enhanced parental leave with 6-months enhanced maternity leave and 4 weeks of fully-paid paternity leave
• Help finding great childcare, with funded hours via Koru Kids

Look after the pennies

• Competitive pension offering with standard and salary sacrifice pension options

Success is best when it's shared

• Quarterly away days with the whole UK team - we all go off-site each quarter to celebrate our achievements
• Quarterly team social budget to recharge and bond with your team
• Lots of social activities and celebrations on our gorgeous rooftop in King’s Cross

First-stage - 30-minute virtual video interview via Google Meet with the People Team to tell you more about JustPark and the role and learn more about your experience

Second-stage - 45-minute virtual video interview via Google Meet with the Hiring Manager

Third-stage - A take home tech task. We always make sure that the task is relevant for the role and efficient for the process. Our tasks vary in length based on the role and seniority but the task would never take longer than a max. of 3-4 hours to complete

Final stage - A 1.5 hour final interview to meet your team and manager, do a code review exercise and cover final interview-type questions around the role

Skimlinks , a Connexity and Taboola company, drives e-commerce success for 50% of the Internet’s largest online retailers. We deliver $2B in annual sales by connecting retailers to shoppers on the most desirable retail content channels. As a pioneer in online advertising and campaign technology, Connexity is constantly iterating on products, solving problems for retailers, and building interest in new solutions.

The Senior Frontend Engineer is based in London, reports to the Sr. Director, Engineering, and is a part of the UK Skimlinks Engineering Team. The Senior Front-end Enginee r is responsible for designing, developing, and maintaining user interface to create visually appealing and functional interfaces that provide a seamless user experience. Their role involves translating design mockups into code, optimizing performance, ensuring cross-browser compatibility, and implementing responsive design to accommodate various devices and screen sizes. Front-end engineers also collaborate closely with back-end developers, UX/UI designers, and other stakeholders to integrate the front end with server-side logic and create cohesive, user-friendly products.

As a Senior Frontend Engineer, your role will involve:

• Collaborating with our design and product teams to work on features that our customers love
• Focusing on creating code that is elegant, easy to maintain, and well-tested
• Taking part in the early stages of product planning, highlighting potential blockers on the front-end side, and providing high-level estimations and timelines
• Identifying refactoring needs and actively participating in efforts to address them
• Playing an active role in the development of our most mission-critical products and services
• Providing technical mentoring to junior team members
• Collaborating with highly capable engineers who enjoy working together and supporting new team members
• Considering ways to make things simpler, more intuitive, and easier for our customers
• Actively seeking improvement in our frontend systems and tools (tests, documentation, build processes, coding standards, etc.)
• Being transparent with the team (both upwards and downwards) about challenges, failures, and successes

Requirements

Our front-end team is responsible for our customer-facing interfaces (Publisher Hub), Chrome extension (Editor Tool), and high-performance Javascript deployed on some of the largest Publishers in the world.

In our tech stack, we use the latest technologies, such as React, Next.js, Typescript, Tanstack Cypress.io, Jest, Docker, and Kubernetes, all hosted in Google Cloud.

About You:

• High degree of fluency in JavaScript, with knowledge of modern techniques as well as core JS concepts.
• Deep understanding of React and it’s ecosystem
• Experience with highly performant vanilla Javascript solutions
• Solid understanding of TypeScript
• Experience integrating with cloud services, and RESTful APIs.
• Modern frontend build tooling (Webpack/Parcel, ESlint, Cypress, Jest, Babel, NPM/Yarn)
• Proficiency in frontend markup and styling 
• Interested in writing high quality, robust code involving approaches such as unit testing, code coverage and static code analysis.
• Have a product mindset: At Skimlinks we truly believe that feature ideas can come from anywhere

Benefits

Voted “Best Places to Work,” our culture is driven by self-starters, team players, and visionaries. Headquartered in Los Angeles, California, the company operates sites and business services in the US, UK, and EU. We offer top benefits including Annual Leave Entitlement, paid holidays, competitive comp, team events and more!

• Healthcare insurance & cash plans
• Pension
• Parental Leave Policies
• Learning & Development Program (educational tool)
• Flexible work schedules
• Wellness Resources
• Equity

We are committed to providing a culture at Connexity that supports the diversity, equity and inclusion of our most valuable asset, our people. We encourage individuality, and are driven to represent a workplace that celebrates our differences, and provides opportunities equally across gender, race, religion, sexual orientation, and all other demographics. Our actions across Education, Recruitment, Retention, and Volunteering reflect our core company values and remind us that we’re all in this together to drive positive change in our industry.

***

This position is hybrid (1-2 days / week) and based in our London office.

#HP