Senior Frontend Engineer - Frontend Platform

Join CKSource, the driving force behind the globally renowned CKEditor, a powerful content editing tool utilized by millions worldwide. Our mission is to develop cutting-edge software components that empower developers to create exceptional applications, including a WYSIWYG editor, file manager, and document converters. Our flagship offering, CKEditor 5, is an innovative, open-source JavaScript rich text editor featuring a customizable data model and a virtual DOM. Explore our GitHub repository for more details.We are proud to be part of Tiugo Technologies, a dynamic launchpad for developer platforms that accelerates growth and enhances efficiency for software companies. Tiugo comprises a suite of leading API-first brands focused on content creation and digital collaboration, including CKEditor, TinyMCE, ButterCMS, and Uploadcare.Our products power millions of applications and websites, enabling seamless content creation and communication for organizations ranging from Microsoft to NASA. While you may not recognize our name, you have likely benefited from our software.Your RoleEngage in the development of our premier products – CKEditor 5 and CKEditor AI, pushing the boundaries of content editing.Craft clean, maintainable, and well-documented code (remember, quality code often speaks for itself! ).Collaborate through code reviews, pair programming, and rigorous testing methodologies.Share best practices regarding programming standards, tools, and processes to foster continual improvement.Develop features and services that will enhance customer experiences and accelerate our company growth.

At CKSource, we are proud to support the remarkable success of CKEditor, a powerful tool utilized by millions globally. Our team develops robust software components that empower developers to create applications with ease, including a WYSIWYG editor, file manager, and document converters. Our flagship product, CKEditor 5, is a cutting-edge open-source rich text editor built with TypeScript, featuring a custom data model and virtual DOM.As an integral part of Tiugo Technologies, we play a key role in a suite of leading API-first developer platforms. Tiugo is dedicated to helping software companies enhance their growth, operational efficiency, and scalability. Our diverse brand family includes CKEditor, TinyMCE, ButterCMS, and Uploadcare, all focused on content creation and digital collaboration.Our solutions have powered countless software applications and websites, facilitating communication and content creation for organizations from Microsoft to NASA. While you may not know our name, our technologies are likely part of your daily life.Your New RoleWe are seeking a passionate Senior Solutions Engineer to act as the technical liaison between our innovative products and our valued customers. In this role, you'll collaborate closely with our sales team to ensure a seamless customer experience, from pre-sales engagements through onboarding and ongoing technical support.The ideal candidate will possess a strong technical acumen paired with exceptional interpersonal skills, enabling you to explain complex concepts clearly and prioritize customer value.As a Senior Solutions Engineer, you will serve as the technical ambassador for CKEditor products, guiding customers in understanding, adopting, and maximizing the benefits of our solutions. You'll receive thorough onboarding support from experienced team members who will familiarize you with our technologies and processes, ensuring you have the tools you need to succeed from day one.

CKSource is the innovative force behind CKEditor, an open-source rich text editor trusted by millions globally. As part of Tiugo Technologies, we are at the forefront of API-first developer platforms, which includes CKEditor, TinyMCE, ButterCMS, and Uploadcare, all dedicated to enhancing content creation and digital collaboration.Your Role:In the capacity of Principal Product Engineer, you will bridge engineering with product discovery and delivery. Your primary focus will be on CKEditor, initially honing in on the editor and frontend experience, and subsequently extending your expertise to backend services and AI functionalities as needed. Your contributions will also encompass other CKSource products, with particular emphasis on frontend components and shared building blocks.Your mission will be to pinpoint high-impact opportunities, swiftly prototype solutions, and transform the most promising experiments into robust production-ready features.Collaboration will be key as you work closely with engineering leaders, product managers, and domain experts to influence product direction. You will engage with teams across the editor/frontend, cloud services, and integrations to deliver comprehensive features from inception to execution.This position demands a builder's mindset and comfort with navigating ambiguity. It offers a high degree of autonomy as you will play a pivotal role in shaping the product trajectory across CKEditor and CKSource. Additionally, you will guide teams in integrating AI-assisted development into their daily operations.Key Responsibilities:Identify and solve significant challenges across CKEditor and CKSource products, recognizing areas where AI or automation can provide value.Collaborate with product and engineering stakeholders to define objectives, scope, and success metrics.Design practical end-to-end solutions that encompass the editor, backend services, and other portfolio products.Rapidly prototype, gather feedback, and evolve successful concepts into production features.Develop integrations and platform patterns (APIs, workflows, ecosystems) that enhance product capabilities.Influence technical direction and best practices across teams, facilitating the effective adoption of new tools.Promote the use of AI-assisted development (agents, reviews, testing, operations) to enhance our software development and delivery process.

CKSource builds software components used by developers worldwide, including the open-source CKEditor 5 rich text editor. CKEditor 5 is written in TypeScript and features a custom data model and virtual DOM. The company’s products support millions of applications, with a portfolio that includes CKEditor, TinyMCE, ButterCMS, and Uploadcare. CKSource is part of Tiugo Technologies, whose tools help drive digital content creation and collaboration for organizations ranging from Microsoft to NASA. Role overview This remote Quality Assurance Engineer position focuses on maintaining high standards for CKSource’s products, especially within the Cloud Services project and the Customer Portal platform. The QA team values technical skill, creativity, patience, and an open-minded approach. New team members receive support and guidance during onboarding to help them get up to speed with the company’s products and workflows. What you will do Oversee end-to-end testing for complex back-end and cloud services, including those running on AWS, Docker, and, when needed, virtual machines. Design, develop, and update automation scripts for API and environment testing across both SaaS and on-premises deployments. Requirements Technical experience with back-end and cloud service testing. Ability to create and modify automation scripts for API and environment testing. Comfort working with AWS, Docker, and virtual machine setups. Strong interpersonal skills and a collaborative mindset. To learn more about CKEditor 5, visit the product page or explore the GitHub repository.

About Kota:At Kota, we are revolutionizing the accessibility of insurance and retirement benefits by utilizing modern technology. Our flagship offerings include the Kota Platform, the world's first fully integrated benefits platform, and Kota Embed, our innovative embedded insurance and retirement solution for other platforms.Our mission is to enhance the accessibility and enjoyment of insurance and benefits for today’s workforce.Founded in 2022, Kota has successfully secured €7.6 million in funding from leading European tech investors including EQT Ventures, Northzone, Frontline, and influential angels such as Job Van Der Voort of Remote, Romain Huet (formerly of Stripe, now at Open AI), and David Clarke (formerly of Workday). Our investors have a proven track record of backing successful companies like Spotify, Airbnb, Klarna, and many others.Role OverviewWe are seeking a Senior Frontend Engineer to join our Customer Platform team, which is dedicated to enhancing the product that our customers use to manage and offer benefits. This role is pivotal to Kota, as it involves developing the application that facilitates interactions between employers and employees regarding health, pension, and insurance services. Please note: This position focuses on our core customer-facing product, rather than platform-as-a-service or internal tools.In this role, you will leverage Remix, React Router, and other cutting-edge frameworks to create sleek, dependable, and responsive user interfaces. We are looking for a candidate who can harmonize speed and quality, with a passion for crafting a product that thousands depend on daily. Your expertise will contribute to building pixel-perfect, scalable UIs while maintaining high coding standards. If you are detail-oriented, dedicated to enhancing user and developer experiences, and thrive in a fast-paced environment, we want to hear from you!Why Join Us?Take Ownership of the Core Product – Your contributions will directly influence how our customers engage with Kota. You won’t be bogged down by internal tooling or SDKs; your work will shape the actual experience for companies and employees.Deliver Quickly and Effectively – As part of a small, empowered team that values clean code, rapid execution, and intelligent decision-making, you will have the autonomy to influence the development process.

Join our dynamic team at natter, where we are passionate about building innovative solutions that redefine user experiences. We are seeking a talented Senior Frontend Engineer who is eager to tackle complex challenges and contribute to the development of cutting-edge web applications. If you are ready to make an impact in a collaborative and creative environment, we want to hear from you!

Are you a technical trailblazer? At pridelogic, we are on the lookout for a Senior Frontend Engineer who is not just a developer but a technical powerhouse. If you possess the following traits, we want to hear from you:You are recognized as the technical leader on your team.You have a knack for solving problems that others find challenging.You deliver complex features in record time, outperforming your peers.Your code is so clean that it could serve as a tutorial for others.You take pride in enhancing and maintaining the integrity of the entire codebase.This role isn’t for everyone, and that’s intentional. We seek developers who are confident in their exceptional skills and can demonstrate a proven track record of success.

Join our dynamic team at clanx as a Senior Frontend Engineer and take your career to new heights! In this fully remote role, you will be instrumental in crafting innovative web applications that enhance user experiences. Your expertise in frontend technologies will enable you to collaborate with cross-functional teams to deliver high-quality solutions.

Join Unifonic, a dynamic SaaS startup recognized as a Great Place to Work®, transforming business communication. With a team of over 500 passionate individuals, we are dedicated to delivering exceptional experiences to more than 5000 customer-focused companies.Our collaborative and fun work environment fosters creativity and innovation, making us more than just a team—we are Unifones. Join us to be part of something significant!Meet the Team!As a member of our Engineering team, you will design, develop, and maintain the systems that power Unifonic’s innovative solutions. Collaborating closely with various departments, you will ensure that our products meet customer needs. If you are passionate about technology and eager to work on cutting-edge communication and engagement solutions, we want you!In the role of Frontend Engineer, you will implement enhancements, define architecture, support bug fixes, analyze data, and report key metrics focused on our platform's frontend. You will contribute to the next-generation evolution of our product using Angular to ensure an outstanding user experience.Help us shape the future of communication by:Driving frontend architecture to support our scaling platform.Building and maintaining policies and procedures for our frontend architecture.Collaborating with various teams to provide technical vision for our core products.Creating best practices and frameworks for web applications and tools.

Nagarro is seeking a highly skilled Senior Frontend Engineer to join our innovative engineering team. In this role, you will leverage your expertise in frontend technologies to design and implement user-friendly web applications that enhance the overall user experience. Your contributions will play a vital role in shaping our products and collaborating with cross-functional teams to deliver exceptional solutions.

Pindrop is seeking a talented Senior Frontend Engineer to join our dynamic engineering team. In this role, you will leverage your expertise in frontend development to create innovative solutions that enhance our customer experience. You will work closely with cross-functional teams to design, develop, and optimize web applications that are both functional and visually appealing.The ideal candidate will have a passion for coding and a strong understanding of web technologies. You’ll be responsible for implementing responsive designs, improving application performance, and ensuring seamless user experiences across devices.

The future of AI — whether in training or evaluation, classical machine learning or agentic workflows — begins with high-quality data.At HumanSignal, we are constructing a robust platform that empowers the creation, curation, and evaluation of this essential data. Our tools, utilized by leading AI teams, are crucial for fine-tuning foundational models and validating agent behaviors in production, ensuring that models are rooted in real-world signals rather than noise.Our open-source product, Label Studio, has emerged as the de facto standard for labeling and evaluating data across various modalities — including text, images, time series, and agents in environments. With over 250,000 users and hundreds of millions of labeled samples, it stands as the most widely adopted open-source solution for teams dedicated to building AI systems.Label Studio Enterprise enhances our success with the security, collaboration, and scalability features necessary to support mission-critical AI pipelines, powering everything from model training datasets to evaluation test sets and continuous feedback loops. We have been pioneering this space since before foundation models became mainstream, and now we are doubling down in a world increasingly driven by AI. If you are passionate about helping leading AI teams develop smarter, more accurate systems, we would love to hear from you.This is a product-engineering role: not just “build what you’re told,” but shape what we build — own the problem, propose solutions, and deliver outcomes that matter to users and the business.

Join our dynamic team at TechBizGlobal as a Senior Frontend Software Engineer. In this fully remote position, you will leverage your expertise in frontend development to create innovative solutions and enhance user experiences. You will collaborate with cross-functional teams to design, develop, and implement cutting-edge web applications that meet the needs of our clients.

With the trust of over 18,000 Shopify and Shopify Plus stores—including renowned brands like Brooklinen, Ruggable, True Classic, and Dr. Squatch—Postscript equips ecommerce businesses with essential tools to execute top-tier SMS marketing strategies.Our mission is to establish SMS as the premier revenue channel for ecommerce merchants by offering an intuitive platform that facilitates subscriber growth, messaging strategy development and testing, exemplary customer service, and sales and loyalty enhancement—all in one cohesive environment. We firmly believe that SMS is the most pivotal marketing and sales avenue of the decade, and this conviction underpins all our initiatives.Founded in 2018 as a fully remote company, Postscript has grown to over 250 employees and is proudly backed by prominent investors such as Greylock and Y Combinator.As a Senior Frontend Engineer in the Messaging Channels team, you will be responsible for constructing and deploying user-facing experiences that drive our multi-channel messaging platform, enabling leading ecommerce brands to effectively communicate with their customers via SMS, email, and other emerging channels.At Postscript, Senior Engineers are seasoned individual contributors who take ownership of critical frontend features and systems. They blend extensive technical knowledge with a strong product instinct to deliver refined, high-performing user experiences. Our frontend technology stack includes React and TypeScript, and we are expanding into new product areas as Postscript evolves beyond SMS.The ideal candidate is a frontend specialist with several years of experience in building intricate, interactive web applications using React and TypeScript. They are passionate about user experience, code quality, and frontend excellence. The candidate should be adept at thriving in a dynamic environment where collaboration with designers, product managers, and backend engineers is essential to launch outstanding products.This is a fully remote position.

About UsAt thesirius, we're powered by the backing of a16z Speedrun, dedicated to providing innovative solutions that drive growth for top consumer brands. Our advanced technology is relied upon by industry leaders such as Higgsfield and Promova. As we scale our operations, we are on the lookout for talented professionals who are passionate about making impactful contributions to consumer technology advancements. Join our vibrant team where initiative, ambition, and a commitment to excellence in problem-solving are highly valued.Position OverviewIn the role of Senior Frontend Engineer, you will be instrumental in the design, development, and maintenance of the user-facing elements of our core products. Your key responsibilities will include:Crafting and implementing robust, scalable, and user-centric interfaces that accommodate new features and shifting business requirements.Collaborating seamlessly with backend engineers, product managers, and design teams to deliver high-quality, integrated solutions.Providing technical guidance through best practices, mentoring fellow team members, and engaging actively in code reviews.Championing the adoption of contemporary frontend technologies, frameworks, and methodologies to guarantee product quality and maintainability.Identifying and addressing intricate technical challenges pertaining to user experience, performance, and security.Fostering a culture of continuous improvement and operational excellence within the engineering team.QualificationsA minimum of 5 years of professional experience in frontend development for high-traffic applications.Expertise in JavaScript/TypeScript and familiarity with modern frontend frameworks.Proven experience in integrating frontend applications with backend APIs and third-party services.Strong understanding of UI/UX principles, performance optimization, and frontend architecture.Excellent analytical skills with a track record of independently driving projects to successful completion.Full-time availability and a strong passion for contributing to a high-growth, ambitious environment.How to ApplyWe invite you to submit a brief introduction along with your resume for consideration.

MyStudio offers a cutting-edge software-as-a-service suite tailored for fitness, martial arts, and other membership-based businesses. Our innovative platform empowers studio owners by automating their customer engagement processes, ultimately increasing their revenue and freeing up valuable time for them to focus on their passion.We are on the lookout for an exceptionally talented Senior Frontend Engineer to join our vibrant development team. In this pivotal role, you will design and develop user interface components utilizing React.js principles and workflows. You will work collaboratively with cross-functional teams to define, design, and deploy new features, ensuring our applications deliver outstanding performance, quality, and responsiveness. If you have a passion for crafting high-quality, scalable, and user-focused frontend solutions, we can't wait to meet you!

About UsAt Finix, we are revolutionizing the way businesses interact with money. As a comprehensive full-stack acquirer processor, we empower organizations of all sizes with innovative and adaptable payment solutions. Annually processing billions in transactions, Finix enables SaaS, marketplace, and e-commerce platforms to effortlessly accept payments, manage payouts, and onboard merchants. Our suite of no-code, low-code, and developer-friendly tools allows businesses to launch in mere hours rather than months.With over $175 million raised, including a significant $75 million Series C round led by Acrew Capital and backed by notable investors such as Lightspeed Venture Partners, American Express Ventures, and Sequoia Capital, we are poised for growth.As a Senior Frontend Engineer on our Frontend Engineering Team, you will play a pivotal role in architecting and constructing the core payment experiences that empower thousands of businesses. You will be responsible for developing our extensive payments management dashboards and embeddable components that merchants integrate into their applications seamlessly.This position allows you to influence the technical vision for customer-facing products from inception through to production. You will lead design and implementation decisions, ensuring our payment interfaces remain high-performing, secure, and user-friendly as we scale. Our engineering team operates with a high degree of autonomy and ownership—each engineer makes impactful contributions that directly enhance customer success in a dynamic fintech landscape.Finix seeks engineers who possess excellent technical skills, a keen eye for detail, a passion for growth, and a dedication to delivering an outstanding customer experience.

Role: Senior Front-End EngineerLocation: US-based (East Coast preferred; Mountain works).Work Setup: Fully remote, engaging with a collaborative and fast-paced team.Mission: Develop and deliver a dynamic geospatial web application essential for mission-critical operations.ResponsibilitiesLead the end-to-end development and deployment of front-end features within a TypeScript/React codebase.Create interactive geospatial user interface workflows utilizing Cesium, enhancing the overall application user experience.Transform ambiguous project requirements into actionable tasks: decompose assignments, identify dependencies, prioritize effectively, and execute efficiently.Enhance UI performance and reliability for a data-intensive, dynamic application (not merely a static marketing site).Collaborate closely with backend engineers to outline contracts, resolve obstacles independently, and advance projects with minimal oversight.Contribute to the establishment of front-end standards, focusing on code quality, component patterns, testing methodologies, and release processes.QualificationsOver 5 years of experience in building production-level React applications (TypeScript is strongly preferred).Proven ability to drive tasks to completion with strong engineering instincts in a small team environment.Experience in developing complex, interactive user interfaces (including state management, asynchronous flows, and performance optimization).Familiarity with component libraries and design systems, specifically MUI / Material UI.Excellent debugging and problem-solving abilities—capable of resolving issues independently.Comfortable working collaboratively within a shared codebase adhering to established standards and best practices.Preferred SkillsExperience in geospatial/GIS technologies (Cesium, map-centric UIs, geo data interactions).Some backend knowledge to understand APIs, troubleshoot issues, and facilitate effective collaboration.Familiarity with Python to support cross-stack interactions in our environment.Experience with simulation-style or real-time workflows such as gaming, visualization, mapping, or flight/vehicle systems.

Join Hudl as a Senior Frontend Software Engineer specializing in our platform's frontend development. In this role, you will be responsible for crafting exceptional user experiences and optimizing our web applications. Collaborate with a dynamic team of developers and product managers to innovate and enhance our platform's usability.You will leverage your expertise in modern JavaScript frameworks and UI design principles to build scalable applications. If you are passionate about creating user-friendly interfaces and enjoy working in a collaborative environment, we would love to hear from you.