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Moss Logo Moss · IT - Software Development

Senior Front-End Engineer - Financial Services

Poland, Warsaw · Job Posted February 18, 2026
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Job Description

At Moss, we give finance professionals the power to automate their day-to-day and make forward-thinking decisions. Our team and culture make us unique — we’re driven by impact and growth, where every one of us strives to learn and excel. Recognised by Sifted’s Rising 100 and LinkedIn's Top Startups, we’re here to help propel your career and together, make Moss a lasting success. Our Financial Services Tribe is looking for a Senior Frontend Engineer (f/m/d) to design and scale mission-critical workflows for financial experts. You will build secure, intuitive user interfaces for wallets, payments, statements, and more - transforming complex financial logic into clear and efficient user experiences. You’ll collaborate closely with product, design, and backend teams to deliver seamless and reliable financial solutions at scale.

Job Responsibility

  • Frontend Development: Lead the development of the frontend application, ensuring it aligns with the approved designs and meets performance and usability standards. Proactively provide regular updates on work progress, achievements and challenges to product managers (PMs) and designers
  • Collaborative Planning: Partner with PMs and designers during project kick-offs to gain a comprehensive understanding of the overall vision, user needs, and goals. Provide valuable insights to refine UI/UX concepts and contribute to the planning of frontend development
  • Backend Collaboration: Collaborate closely with backend engineers to determine required APIs and backend functionality. Maintain clear communication channels to ensure smooth integration of frontend and backend components
  • Testing and Quality Assurance: Produce well tested and reliable code. Writing unit and functional (end-to-end) tests
  • Rollout and Performance Monitoring: Collaborate with product managers to devise efficient rollout strategies for new features. Monitor frontend performance and user feedback to identify areas for improvement and proactively address potential issues

Requirements

  • Proven experience as a Frontend Engineer, working on complex UI-heavy applications
  • Proficiency in frontend development technologies, latest features and best practices such as React/TypeScript, as well as front-end development design patterns and techniques
  • Hands-on experience with frontend testing approaches and libraries (i.e. Testing Library, visual snapshot testing)
  • Understanding of Rest API design principles
  • You are fluent in English

Nice to have

  • Pragmatic Tech Enthusiast
  • Delivery Focused
  • Collaborative Communicator
  • Inquisitive Mindset
  • Team Player

What we offer

  • Top-of-market compensation package, including equity
  • 20 days “work from abroad”
  • 600EUR/GBP Learning & Development Budget
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