Source Job

Canada

  • Define the technical direction of the web UI platform across performance, accessibility, consistency, and infrastructure.
  • Lead cross-team frontend initiatives, balancing long-term strategy with hands-on engineering and practical delivery.
  • Establish reusable patterns, standards, and tooling to improve developer velocity and product reliability.

JavaScript TypeScript React Angular CSS

20 jobs similar to Principal Software Engineer, Front End Web UI Platform

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UK 6w PTO

  • Lead a talented frontend engineering team responsible for building high-performance digital experiences in a large-scale MarTech environment.
  • Drive architectural decisions, guide major platform migrations, and ensure delivery of scalable, high-quality applications.
  • Mentor and grow the team while promoting engineering best practices and collaborating with cross-functional stakeholders.

The company operates in the marketing technology (MarTech) industry. It fosters a supportive culture focused on innovation, collaboration, and continuous learning.

Canada

  • Partner with Product and Design to define, build, and evolve user experiences using modern frontend technologies.
  • Own and evolve the frontend architecture to ensure scalability, performance, accessibility, and long-term maintainability.
  • Lead the design and implementation of complex frontend systems using React, TypeScript, and Next.js.

EarnIn provides real-time financial flexibility through earned wage access, operating without mandatory fees or credit checks. The company is backed by top investors, has an experienced leadership team, and is growing rapidly.

Global

  • Act as technical anchor for front-end team, combining hands-on development with technical leadership.
  • Provide senior hands-on front-end engineering support and guide UI/front-end implementation decisions.
  • Collaborate with client stakeholders and mentor team members to drive high-quality engineering standards.

Software Mind develops solutions that make an impact for companies around the globe. Tech giants & unicorns, transformative projects, emerging technologies and limitless opportunities – these are a few words that describe an average day for us.

$150,000–$175,000/yr
US Canada

  • Lead a development team to craft and maintain frontend infrastructure for an all-in-one interior design platform.
  • Guide engineers in solving impactful customer challenges and establishing strong technical direction.
  • Partner with product and CTO to balance priorities, team morale, and product quality.

Studio Designer powers the business side of interior design firms with intuitive tools for project management and financial tracking. With over 20,000 designers using their platform, the company fosters a collaborative and creative environment that prioritizes team well-being.

Global

  • Build and ship frontend features across Vue, Angular, and React codebases.
  • Design and implement software solutions in collaboration with product, design, and backend engineering.
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Okendo is a customer marketing platform that helps Shopify brands turn one-time shoppers into repeat customers. Trusted by 16,000+ brands, we value one team, customer championing, excellence, ownership, integrity, and always day one.

Global

  • You'll join a platform team that empowers our Service Squads with experimentation capabilities.
  • You'll craft experiments and the tools to build them using frontend technologies.
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Markeeters connects the top 1% of technology, growth, and marketing experts from India to global businesses. They are building the future of work for India's top remote talent.

Europe 6w PTO

  • Lead and mentor a team of Frontend developers in the Marketing Tech and Social domain.
  • Drive high-level architecture and design decisions for complex software systems.
  • Maintain a hands-on coding role alongside line management responsibilities.

Sporty Group is a remote-first company in pursuit of sustainability. They offer a competitive salary, quarterly performance bonuses, and annual company retreats.

Canada 4w PTO

  • Partner with Product, Design, and Engineering to define and deliver new AI Receptionist capabilities.
  • Design and build modern, responsive web applications using React and TypeScript.
  • Optimize application performance, accessibility, and reliability across enterprise-scale deployments.

Cresta unlocks the true potential of customer experience by turning every conversation into a competitive advantage. Born from the Stanford AI Lab, Cresta has raised over $270 million from leading investors including a16z, Greylock, and Sequoia.

Global

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Serverless Guru LLC is a technology company that builds modern, scalable web applications using cloud-native technologies. The company emphasizes engineering excellence, maintainability, and collaborative cross-functional teams.

$125,000–$177,000/yr
US Canada Unlimited PTO

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  • Partner closely with Design and Product to clarify requirements, negotiate scope, and maintain quality.

Censys provides real-time Internet intelligence and actionable threat insights to global governments, over 50% of the Fortune 500, and leading threat intelligence providers worldwide. The company is mission-driven, has a global team, and values diversity and inclusion.

Europe 6w PTO

  • Lead frontend architecture for B2C and B2B platforms, ensuring scalability, security, and performance.
  • Manage and mentor a distributed team of 20–25 frontend engineers, fostering a culture of ownership.
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Our partner is a leading iGaming company developing large-scale digital gaming products and a new B2B platform. They employ a distributed team of over 20 frontend engineers and foster a culture of collaboration, ownership, and continuous improvement.

US

  • Design, build, and maintain modern, accessible user interfaces for Varsity Spirit's Yearbook Technology platform.
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Varsity Spirit is the leading global source for spirit-related products and services, including cheerleading, dance team, performing arts, and yearbook. With over 5,000 employees, they are committed to celebrating school spirit while prioritizing safety and wellbeing.

Spain Unlimited PTO

  • Lead frontend platform initiatives to accelerate the migration from Ember to React.
  • Strengthen design systems and build tooling that help engineers and AI agents produce high-quality frontend code.
  • Own AI-assisted frontend tooling and improve shared infrastructure and delivery pipelines.

Lighthouse is revolutionizing commercial strategy as hospitality's most powerful AI platform, leveraging the world's largest hotel data network to deliver real-time intelligence. With over 850 teammates across 35 countries and $100M in ARR, we're a fast-scaling community of Lumineers committed to excellence and innovation.

$125,000–$210,000/yr
United States Canada Unlimited PTO

  • Own the long-term technical direction of Roo's frontend platform, including systems, tooling, and architecture across web and mobile.
  • Partner with Product and Design to evolve the design system and improve developer experience through shared tooling, automation, and workflows.
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Roo is a veterinary staffing platform that connects animal healthcare professionals with hospitals for relief work and hiring opportunities. With a network of over 20,000 professionals and 9,000 animal hospitals, Roo has provided over 3 million hours of healthcare and helped veterinarians earn over $200 million.

US Unlimited PTO

  • Lead front end and full stack initiatives from ambiguous problem statement to shipped, measured outcome, making architecture calls and sequencing work.
  • Partner with product and design to shape the experience, own performance, stability, accessibility, and maintainability at scale.
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Grove Collaborative is a sustainability-focused consumer products company creating household and personal care essentials that are effective, beautifully designed, and healthier for people and the planet. As a certified B Corp and plastic-neutral company, we are on a mission to transform the CPG industry for good, with a data-driven engineering culture operating in small, autonomous teams.

US

  • Own the end-to-end front-end experience for an enterprise-scale Agentic AI platform.
  • Design intuitive interfaces that transform complex AI reasoning into experiences engineers trust.
  • Build and maintain conversational interfaces, embedded AI assistants, and review workflows using React, TypeScript, and modern front-end technologies.

LTS builds AI-native engineering platforms to modernize legacy systems, particularly healthcare systems serving Veterans. The engineering team is intentionally small, fostering significant ownership and influence over product direction.

Global Unlimited PTO

  • Set and drive front-end technical strategy across the Account Experience teams, from architecture to implementation
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Primer is a unified infrastructure for global payments, giving teams visibility and control to reduce complexity and capture more revenue. We're fully remote, backed by top investors, and building the payments layer leading companies rely on.

$109,500–$146,000/yr
Canada

  • Build mobile-responsive user interfaces with React and TypeScript, shipping high-quality code from day one.
  • Own frontend architecture decisions, including component design, state management, and performance optimization.
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Hiive is redefining how private companies and their shareholders access liquidity. Recognized as one of Canada's fastest-growing companies and backed by leading U.S. investors, Hiive is profitable and building a high-performance team.

US

  • Act as technical lead on client website implementations, managing sprint ceremonies and frontend delivery.
  • Translate Figma designs into responsive HTML/CSS using React, Next.js, and Tailwind 4.
  • Develop data models and reusable components within headless CMS platforms like Optimizely.

Studio Science helps businesses design for people, creating experiences that work better. They emphasize honesty, collaboration, and a choice to be great, fostering an inclusive culture for independent contractors integrated into project teams.

UK 6w PTO

  • Drive the technical direction of the frontend application stack.
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  • Own code quality and team development through review and mentorship.

Reactive Markets is a leading provider of over-the-counter trading platforms for FX, Equities, and Cryptocurrency, handling over $50 billion in daily trading volumes. The company has a small, senior engineering team focused on building cutting-edge, high-performance trading systems.