Senior Frontend Engineer

Role: Senior Frontend Engineer Location: Poland (Remote) Type: B2B Contract Rate: up to 235 PLN per hour Industry: Financial Services The Opportunity: We're partnering with a leading financial services organisation that is transforming its next-generation portfolio management platform used by Portfolio Managers and Analysts across Equity, Fixed Income, and Multi-Asset teams. As a Senior Frontend Engineer, you'll play a key role in building modern, high-performance front-end applications, helping modernise legacy platforms and delivering cutting-edge user experiences. You'll work within a highly skilled engineering team focused on advanced data visualisation, enterprise-grade UI components, and micro-frontend architecture. This is a fully remote opportunity for engineers based in Poland who enjoy solving complex technical challenges within a fast-paced financial environment. What You'll Be Doing: Developing and enhancing complex React and TypeScript applications used across investment management teams.Building reusable, scalable UI components for a shared enterprise component library.Migrating legacy portfolio management functionality into modern micro-frontend applications.Contributing to the development of advanced AG Grid Enterprise solutions, including custom renderers, editors, grouping, pivoting, and performance optimisation.Collaborating with architects, product teams, and fellow engineers to deliver high-quality solutions.Writing comprehensive automated tests and contributing to engineering best practices.Supporting technical design discussions and helping drive frontend architecture decisions.Working closely with business stakeholders to translate complex workflows into intuitive user interfaces. Required Skills & Experience: Strong commercial experience developing applications with React 18+.Expert knowledge of TypeScript, including advanced typing and scalable application design.Experience building large-scale Single Page Applications (SPAs).Hands-on experience with AG Grid Enterprise.Strong understanding of Material UI (MUI) and component-driven development.Experience creating and maintaining reusable component libraries.Solid testing experience using tools such asExperience working within micro-frontend architectures.Strong problem-solving and communication skills. Nice to Have Financial services or investment management experience.Exposure to FDC3 or Interop.io.Experience working with monorepos and pnpm workspaces.Knowledge of frontend performance optimisation techniques.Experience with TanStack Query or SWR.Storybook for component documentation and visual testing.Experience leveraging modern AI-assisted development tools. What's on Offer? Fully remote working from anywhere in Poland.Long-term contract opportunity.Work on a business-critical platform used by global investment professionals.Exposure to modern frontend technologies and enterprise-scale architecture.Collaborative engineering culture with a strong focus on quality and innovation. If you're a Senior React Engineer looking to work on sophisticated financial technology products and enjoy building high-performance, data-rich applications, we'd love to hear from you.