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MappOptimist Technologies

Senior Frontend Engineer/ Developer (React, Next.js, Angular)

6-8 Years
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  • Posted 17 hours ago
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Job Description

About the Role

We are hiring a Senior Frontend Engineer to architect and deliver high-performance, secure, and accessible frontend applications for an enterprise retirement fintech platform serving millions of users.

This is a deeply technical, hands-on role. You will own frontend architecture, performance, state management, SSR/CSR strategies, and security-critical UI flows in a regulated environment.

Key Responsibilities

  • Architect and build production-grade React and Angular applications
  • Implement SSR/CSR/ISR using Next.js with performance and SEO trade-offs
  • Own state management architecture (Redux Toolkit / Zustand / React Context)
  • Optimize frontend performance:

ؠCore Web Vitals

ؠBundle size, code splitting, lazy loading

ؠRendering and re-render control

  • Integrate and optimize REST & GraphQL APIs (Apollo Client / React Query / SWR)
  • Build or support Node.js BFF services for frontend-optimized data access
  • Implement WCAG 2.1 AA accessibility (ARIA, keyboard navigation, screen readers)
  • Enforce frontend security best practices:

ؠXSS / CSRF prevention

ؠOAuth2 / OIDC-based auth flows

ؠCSP and secure headers

  • Build reusable components and contribute to design systems
  • Write and maintain unit, integration, and E2E tests
  • Mentor engineers and participate in architectural decision-making
  • Own frontend production issues and performance regressions

Required Skills (Non-Negotiable)

  • 6+ years of frontend engineering experience
  • Expert-level React (Hooks, lifecycle, reconciliation, performance tuning)
  • Strong Angular experience (Angular 12+, RxJS, change detection)
  • Advanced TypeScript (strict configs, generics, complex typing)
  • Proven Next.js experience (SSR, SSG, ISR, routing)
  • Strong state management experience:

ؠRedux Toolkit / Zustand / React Context

  • API integration expertise:

ؠREST

ؠGraphQL (Apollo Client preferred)

  • Strong CSS and styling knowledge:

ؠCSS Modules / SCSS / styled-components / Tailwind

  • Deep understanding of:

ؠCore Web Vitals

ؠLighthouse metrics

  • Hands-on accessibility implementation (WCAG 2.1 AA)
  • Frontend security knowledge:

ؠXSS, CSRF, CSP

  • Testing experience:

ؠJest

ؠReact Testing Library

ؠCypress or Playwright

  • Production experience with Git-based workflows and CI/CD

Good-to-Have (Strong Advantage)

  • FinTech / banking / regulated systems experience
  • Micro-frontend or Module Federation exposure
  • Data visualization (Ag-Grid, D3, Recharts, Chart.js)
  • Real-time features (WebSockets, Socket.io)
  • Design systems / Storybook
  • Frontend observability (Sentry, LogRocket, Datadog RUM)

What We Are Looking For

  • A hands-on senior engineer, not just a reviewer
  • Someone who has designed, scaled, and fixed frontend systems in production
  • Strong ownership of performance, accessibility, and security
  • Comfortable working in audit-heavy, compliance-driven environments
  • Can balance speed with correctness

Work Mode

  • Remote / Hybrid (as per client alignment)

Interview Process

  • Deep technical screening (React, TypeScript, architecture)
  • Performance + state management discussion
  • Code review / system design round
  • Final client interaction (if required)

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Job ID: 136620049