Sr. Software Engineer, Frontend

Firstup
Northern Ireland
Workplace: RemoteFull timeFunction: Software EngineeringExperience: 5+ yearsEducation: bachelorsSkills: ["Leadership","Collaboration","Communication","Mentoring","Problem-solving"]

Lead the development of scalable, high-performance frontend architectures using React and TypeScript, shaping reusable components, testing strategies, and AI-assisted tooling. Drive engineering excellence, mentor engineers, collaborate with Product and Design, and ensure accessibility and performance at Firstup’s frontend layer in a remote, UK-based context.

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FursaFursa
Firstup
Firstup
3 months ago

Sr. Software Engineer, Frontend

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Source: Company careers pageValidated by: Fursa AI
Last checked: 10 hours agoStatus: Live

Job Summary

Lead the development of scalable, high-performance frontend architectures using React and TypeScript, shaping reusable components, testing strategies, and AI-assisted tooling. Drive engineering excellence, mentor engineers, collaborate with Product and Design, and ensure accessibility and performance at Firstup’s frontend layer in a remote, UK-based context.
Location: Northern Ireland
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering

Key Responsibilities

  • •Core Engineering: Build scalable frontend applications using modern React patterns and a component-driven architecture.
  • •Systems Design: Own the design and implementation of a reusable, accessible component library and documentation.
  • •Testing & Quality: Define the frontend testing strategy (Unit, Integration, E2E) including visual regression and user interaction coverage.
  • •Performance & Reliability: Optimize client-side performance and ensure production readiness through observability, error monitoring, and rapid incident resolution.
  • •AI Integration: Leverage and advocate for AI-assisted tools (e.g., GitHub Copilot, Claude) to accelerate development while maintaining rigorous engineering judgment and accountability for code correctness.

Pay and Benefits

Perks:Health InsuranceRemote WorkPaid Leave

Key Requirements

  • •5+ years building reliable, high-performance frontend applications at scale.
  • •Expertise in React (Hooks, State Management), TypeScript, and modern tooling (Vite, Webpack).
  • •Testing proficiency with Jest, React Testing Library, and Cypress/Playwright.
  • •UI/UX experience building design systems or component libraries with WCAG accessibility.
  • •AI literacy and ability to validate AI-assisted coding outputs (e.g., Claude, Copilot).
Experience:5+ yearsSaaSSoftwareTechnology
Education:Bachelor's
Skills:LeadershipCollaborationCommunicationMentoringProblem-solving
Languages:English
Tech Stack:ReactTypeScriptViteWebpackJestReact Testing LibraryCypressPlaywrightWCAGRuby on RailsNode.jsAWSDockerKubernetesGitHub CopilotClaude

Company Brief

Firstup
Provides an employee communication and engagement platform that helps organizations deliver personalized internal communications, measure engagement, and empower frontline and deskless workers through targeted content distribution and analytics.
Industry: HR Tech
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
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