Frontend Engineer, UI Platform
Hybrid
London, United Kingdom
Full Time
07-03-2025
Job Specifications
About Us
At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.
We realize people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare. Come join us!
Available Locations:
London, UK
Lisbon, Portugal
Austin, TX
About The Department
Cloudflare’s Engineering Team builds and runs the software that handles large amounts of requests on the Internet today. We also build and run the internal tools and platforms that run that software. Individual engineering teams are typically responsible for large areas with considerable impact, and able to execute autonomously within that space to deliver value to their customers - be they internal or external.
About The Role
We are seeking a skilled Frontend (UI) Platform Engineer to join our team. You'll be responsible for the core technology that drives the Cloudflare Dashboard. You'll be pioneering new techniques and tooling to move away from a traditional monolithic application and onto Cloudflare's innovative Web Fragments. In this role, you will enhance UI infrastructure, streamline development workflows, and collaborate across teams to improve code quality and developer velocity. Your contributions will be pivotal in refining the developer experience, ensuring high-quality frontend delivery, and optimizing performance and reliability at scale. Our mission is to improve developer productivity and application performance.
Key Responsibilities
Help build, migrate, and scale the UI platform frameworks.
Drive UI infrastructure excellence, including CI/CD, observability, and experimentation tools.
Tackle cross-cutting concerns to enhance developer velocity, maintainability, and code quality.
Upgrade and maintain the frontend codebase, modernizing legacy components to align with current best practices.
Collaborate with product and design teams to deliver cohesive, self-serviceable user experiences.
Technologies We Use
React, TypeScript, JavaScript (ES6+), Remix, Qwik, PlayWright, Cypress, Vite, Webpack, Bazel, CI/CD tools, Go, RESTful APIs
Qualifications
We want someone who understands and obsesses over front-end systems.
Passion for improving developer experience and increasing development velocity.
4+ years of experience in frontend engineering, specializing in JavaScript, TypeScript, and React.
Strong knowledge of UI infrastructure, CI/CD, and testing frameworks (e.g., Playwright, Cypress).
Proven ability to drive projects independently, from concept to implementation.
Preferred Skills:
Expertise in React.js, TypeScript, and modern front-end systems.
Expertise in performance optimization for frontend applications.
Experience with modern JavaScript bundling tools like Webpack, Vite, and Bazel.
Familiarity with Remix, Qwik, RESTful APIs, and Go.
Experience building and maintaining integration test suites with API mocks.
Experience building and scaling large-scale web applications.
Why Join Us?
Lead a pivotal migration to a modern, scalable UI platform.
Shape best practices and drive impactful engineering change.
Work with modern technologies and solve large-scale challenges.
What Makes Cloudflare Special?
We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.
Project Galileo: Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.
Athenian Project: In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we've provided services to more than 425 local government election websites in 33 states.
1.1.1.1: We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.
Sound like something you’d like to be a part of? We’d love to hear from you!
This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.
Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. We are an AA/Veterans/Disabled Employer.
Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment. If you require a reasonab...
About the Company
Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company. It empowers organizations to make their employees, applications and networks faster and more secure everywhere, while reducing complexity and cost. Cloudflare’s connectivity cloud delivers the most full-featured, unified platform of cloud-native products and developer tools, so any organization can gain the control they need to work, develop, and accelerate their business. Powered by one of the world’s largest and most interconnected networks, Cloudfla... Know more
Related Jobs
- Company Name
- Oracle
- Job Title
- Senior Frontend Developer
- Job Description
- Permanent contract - UK - fully remote; Typescript + React, senior level ; Unfortunately, VISA sponsorship is not available for this position; About the team: The MySQL HeatWave and Advanced Development team is responsible for the massively parallel, high performance, in-memory query accelerator for Oracle MySQL Database Service that accelerates MySQL performance by orders of magnitude for analytics and mixed workloads. HeatWave is 6.5X faster than Amazon Redshift at half the cost, 7X faster than Snowflake at one-fifth the cost, and 1400X faster than Amazon Aurora at half the cost. MySQL Database Service with HeatWave is the only service that enables customers to run OLTP and OLAP workloads directly from their MySQL database. This eliminates the need for complex, time-consuming, and expensive data movement and integration with a separate analytics database. The new MySQL Autopilot uses advanced machine-learning techniques to automate HeatWave, which makes it easier to use and further improves performance and scalability. This cutting-edge technology serves critical business needs, which is changing the way data transactions function, all over the world. You will make a technical impact on the world with the work you do. Join us to help further develop this amazing technology. In our flexible workplace, you’ll enhance your skills and build a solid professional foundation. As a software developer for Oracle's MySQL Heatwave team, you will contribute to an exciting team. You will use your skills and experience to directly improve the experience for Oracle's customers. You will design, implement, and deliver complex features in an independent manner. The role will provide you with great chance to work in a team developing a complex distributed system using a serverless architecture. The ideal candidate has many of the skills, but the key is the motivation and ability to learn quickly as well as a passion for an excellent customer experience. What you will do: As a member of the software engineering division, you will assist in defining and developing software for tasks associated with the developing, debugging or designing of software applications or operating systems. Provide technical leadership to other software developers. Specify, design and implement modest changes to existing software architecture to meet changing needs. Successful candidates will: - Be passionate about writing excellent, well tested and beautiful code. - Design, write, test, and deliver new features. - Enjoy testing and automation to ensure a rock-solid system. Our Ideal candidate: - Proficient in Typescript / Python / HTML / JavaScript and CSS. - Familiar with AWS services (e.g.: Lambda service, Step Functions, DynamoDB, AWS Session manager, CloudWatch, etc.). - A good understanding of single-page web app design. - Ability to work independently and across teams to guide other engineers through technical operations. - Good technical writing and communication skills. - Linux systems administration knowledge including a good understanding of containers. - A good understanding of operating large-scale distributed systems. - Slack skills and being comfortable coordinating with others online. - Very strong analytical skills to identify problem root causes. - An interest in functional programming styles. - BSc minimum in Computer Science, or equivalent. - 4+ years of work experience as a software engineer.
- Company Name
- Mission Zero Technologies
- Job Title
- Senior Interface Engineer (Client Representative)
- Job Description
- About Mission Zero Technologies We’re a London-based climate-tech start-up, working to reframe how the world views carbon in order to enable a thriving planet. Since 2020, we have pioneered the world’s most versatile direct air capture (DAC) technology to recover historic CO₂ emissions from the atmosphere, anywhere, at any scale. Backed by Breakthrough Energy Ventures, the XPRIZE foundation, Stripe, and the UK Government, we’ve moved a brand new climate technology from lab scale to commercial plants in under three years, to empower carbon removal and sustainable utilisation. About The Role A 6-month contract with the possibility of extension. Join MZT at a pivotal moment as we transition from an early-stage R&D startup to a revenue-generating company ready to scale our direct-air capture technology globally. We’re hiring for a Senior Interface Engineer who is skilled across disciplines in the Engineering, Procurement & Construction (EPC) industry. You are likely to have a process engineering background, but alternate starting points could be useful. You have repeated and deep experience in EPC settings working for contracting companies across multiple projects and industries with core experience in the process industries. In this role, you’ll act as the key technical representative facing our EPC suppliers to create scaled-up concept, FEED and eventually detailed design projects for megatonne-scale deployments of our rapidly scaling, proprietary direct air capture (DAC) technology. Receiving information from our R&D, product development, engineering and operations teams, you’ll help our EPC providers create cost comparisons for alternate routes to scale. The role will be based between our headquarters in East-Central London, and an EPC contractor to be selected; expect periodic assignments at emerging UK sites, European suppliers, and international locations as we expand. What You'll Be Doing EPC interface engineering: be involved in every consideration between Mission Zero and our EPC provider conducting engineering studies / FEED / detailed design. Specification and Review: Specify, check, and review all necessary process and interdisciplinary design deliverables from our EPC supplier. This will include reports, datasheets, calculations, and engineering drawings. Engineering Application: Leverage fundamental engineering knowledge to define suitable repeat unit boundaries and optimise plant and product performance as MZT rapidly scales in the direct-air capture space. Interdisciplinary Engineering: Work across multiple interfaces internally and externally to best understand requirements and likely optimisations between real plant operating data and scaled-up designs. Cost Estimation: working closely with the EPC cost estimators and our internal TEA (techno-economic analysis) engineer - develop robust cost estimates with clear uncertainty bounds based on procurement driven ranges. Supply Chain Interfacing: working with our supply chain team, understand and guide the technical options for key potential vendors and their ability to deliver a technically appropriate offer. Project Support: Assist the project team in the technical delivery and approach to scale-up from concept, FEED into detailed design. What You'll Need To Be Successful In This Role MEng Engineering Degree within Process or Chemical Engineering (or suitable discipline). 10 years minimum industrial experience delivering projects with significant process design content across multiple industries. Chartered status with a relevant engineering institution e.g. IChemE. Deep experience in the EPC sector working within and/or as client representative to contracting firms delivering major capital design and execution projects. Experience leading concept design and FEED projects across multiple technologies. Experience in cost estimating >1USD 1 billion capital projects. Experience working with at least one of absorption; scrubbing; continuous gas-liquid systems; electrodialysis. Comfortable working with ambiguity. Ability to design and critically evaluate P&IDs for vendor scope splits on paper and live plant scales especially from a process, controls, and safety perspective. Leadership in hazard and risk identification (HAZID, HAZOP, LOPA, SIL). Experience with engineering supply chain management. Ideally you'll also have >15 years project experience. Experience working with more than one of absorption, scrubbing, continuous gas-liquid systems, electrodialysis. Expertise in process safety procedures with workshop leadership certification. Familiarity with processes handling CO2 and its associated safety concerns / management. Good understanding of electrochemistry. Good understanding of materials in the context of chemical and weathering resistance. Suitable safety accreditation e.g. NEBOSH Lean operational certificate, e.g. six sigma or equivalent Experience in commissioning / decommissioning process units What We Can Offer You 30 days of Annual Leave 3 months Paternity/Maternity Leave £500 annual Personal Development Grant Unlimited mental health support Employee Share Options Scheme Christmas holidays office closure Cycle to work scheme BUPA Cash Plan & gym discounts Employer-matched contributions to global re-wilding programme Opportunities to directly impact where our company is headed A high-growth, high-trust environment that encourages bold creativity At Mission Zero, we value diversity of cultural backgrounds, experience, and perspectives, and leverage these qualities to create exceptional outcomes. We are dedicated to equal employment opportunities regardless of race, sex, religion or belief, ethnic or national origin, age, disability, citizenship, marital, domestic or civil partnership status, sexual orientation, gender identity, pregnancy or related condition, or any other basis as protected by applicable law. Please do not hesitate to let us know if you have a disability or additional need that requires accommodation. Our Hiring Process Kindly allow us up to 2 weeks to review your application. Providing both of our schedules align, the total hiring process should take 4-6 weeks total to wrap up. Application review Intro Call (45 Mins) Getting to know you - (Partner Assessment) Interview and Business Exercise
- Company Name
- Ozone Talent
- Job Title
- Lead Full Stack Engineer
- Job Description
- Lead Full-Stack Engineer | Climate Tech Start-up Compensation: Up to £120,000 + stock options Location: Hybrid/London (1+ day per week in the office) Tech Stack: TypeScript/React, Python/Django, AWS Job Type: Full-time I'm working with a fast-growing climate tech startup who are accelerating the transition to a sustainable future. By combining data, analytics, and research, they empower investors, corporates, and governments to make informed decisions and build the new climate economy. They’re now scaling up to develop AI-enabled tools and innovative features that help clients make smarter decisions in the climate tech space. With a small but talented team, a modern tech stack, and a clear mission, this is an incredible opportunity to join a company that’s making a difference. Key responsibilities include: Frontend development using React, TypeScript & CSS Backend development using Python & Django Building and implementing features end-to-end with AWS Writing high-quality, thoroughly tested code (TDD) Contributing to CI/CD processes and maintaining platform reliability Collaborating with a cross-functional team, including engineers, product managers, and designers Nice to Have: Experience with AI tools (OpenAI’s API) Knowledge of automated data collection techniques Experience within the GreenTech/Sustainability industry Whats on offer: Impactful Work: Join a company that’s driving change in the climate tech space. Generous Stock Options: Share in the company’s success. Time Off: 25 days annual leave + bank holidays. Growth Opportunities: Learn, innovate, and grow in a dynamic team. This is your chance to be part of a mission-driven company that’s tackling one of the biggest challenges of our time. If you’re excited to work with cutting-edge technology and a passionate team. *Due to the high volume of applications, not all applicants will receive feedback
- Company Name
- Liberty Global
- Job Title
- Senior Full-Stack Developer
- Job Description
- We are looking for a Senior Full Stack Developer to join our team based in London. This hybrid role, with expectations to work in the office at least three days a week. We are expanding and enhancing our Lending Digital Platform, InsurTech payments, and Speciality Finance payments for our operational companies across six European countries: the United Kingdom, Belgium, the Netherlands, Ireland, Switzerland, and Slovakia. We are currently hiring for a talented and experienced Senior Full Stack Developer to join our dynamic team. The ideal candidate will be good-natured, personable, and professional, with a strong proficiency in both server-side technologies and front-end development. If you have a passion for creating innovative solutions and possess excellent problem-solving skills, we would love to hear from you. What will you be doing? Lead the development, maintenance, and integration of user-facing elements developed by front-end developers with server-side logic. Oversee all front-end and back-end software development and management. Manage technical data and data storage solutions. Demonstrate fluency in server-side technologies (Node.js, Java, .NET, Python, Ruby, React). Design, implement, and manage databases (MySQL, MongoDB, Snowflake). Containerize applications for easy deployment and scalability. Deploy and manage applications on Google Cloud infrastructure. Collaborate with cross-functional teams to define, design, and ship new features. Take responsibility for bug reporting, investigation, and patching. Optimize applications for maximum speed and scalability. Implement security best practices and ensure data protection. Stay up-to-date with emerging technologies and industry trends. Participate in code reviews and provide constructive feedback to peers. Experience in Test Driven Development (TDD) and Continuous Delivery is a bonus. Manage and report on all technical project tickets, including the creation of acceptance criteria, PO review testing, staging, and production status management. Undertake and take responsibility for comprehensive documentation of the technological stack. We Tend To Look For People With Extensive experience as a Senior Full-stack Developer or in a similar role. Strong proficiency in PHP Laravel, Node.js, TypeScript, React, MySQL, MongoDB, Python, and Ruby. Proven experience with SaaS and Marketplace products on cloud platforms. Expertise in Docker for containerization and deployment, Django framework, and the design and development of REST APIs. Familiarity with Google Cloud services. Solid understanding of web development fundamentals, including HTML, React, CSS, and JavaScript. Excellent communication skills, with a strong emphasis on transparency and honesty, a tenacious problem-solver with keen attention to detail. Ability to work independently and collaboratively as part of a team. Strong communication and interpersonal skills. What’s in it for you? Competitive salary + bonus 25 days annual leave with the option to purchase 5 more Access to wellbeing and mental health benefits such as the Calm app, personal medical, critical illness cover and dental insurance Matched pension contribution up to 10% Access to our car benefit scheme Access to our online learning platform to continue to develop and grow your career with us The chance to join an innovative, fast-paced and passionate team Who We Are Liberty Blume, a Liberty Global company, is a rapidly growing business services provider, specialising in tech-enabled back-office solutions. Our mission is to deliver efficiency, scale and value to our customers through Business, Procurement and Financial Solutions. If you’re curious, customer centric and enjoy being one step ahead, join us on our scale up journey and unlock your freedom to grow! Liberty Global is an equal opportunity employer, committed to an inclusive environment and accommodating all candidates. We’re eager to hear from you, no matter your background.