- Location: Bengaluru / Mumbai / NCR (Hybrid / Remote Flexibility)
- Employment Type: Full-Time
- Department: Frontend Engineering &
- Financial Systems
- Experience Range: 5–8 Years

About The Company &

- Engineering Culture

In the world of high-frequency financial technology, digital payments, and real-time trading systems, absolute precision, ironclad security, and sub-millisecond responsiveness are non-negotiable. As a high-growth Fintech SaaS and transaction infrastructure enterprise, we build ultra-reliable financial web applications that process millions of high-value transactions, multi-currency settlements, and real-time portfolio dashboards daily. Our frontend engineering culture is built around rigorous state management, rigorous security compliance (PCI-DSS standards), zero-latency DOM updates, and fault-tolerant error boundaries. We leverage modern web technologies to render complex financial instruments, live order books, and payment checkout flows seamlessly across desktop and mobile devices. If you are passionate about building mission-critical financial applications where correctness and performance matter above all else, this is your arena.

Position Overview An expert, hands-on Senior Frontend Engineer is needed to architect and scale our next-generation merchant checkout SDKs, financial dashboards, and high-frequency trading/reconciliation terminals. In this role, you will own the frontend architecture of our core monetary products, ensuring lightning-fast load times, bulletproof data consistency, and seamless security isolation.

You will collaborate closely with backend payment engineers, security specialists, UI/UX designers, and product managers to transform complex financial ledgers and transaction streams into intuitive, ultra-responsive web experiences.

Key Responsibilities &

- Technical Ownership1. Architecture &
- Core Component Development

- Scalable UI Architecture: Design, build, and maintain modular, extensible frontend architectures using React.js, Next.js, and TypeScript for high-concurrency fintech applications.
- Secure Payment SDKs &
- Embedded Widgets: Architect lightweight, highly secure, and embeddable payment checkout widgets and SDKs that integrate seamlessly across thousands of external merchant websites.
- Real-Time Financial Streaming UI:



Build robust state management layers to handle high-frequency WebSocket connections for live ticker feeds, order book updates, and instant transaction status pushes without UI stutter.
- Security, Performance &
- Compliance Mastery
- Security &
- Tokenization: Enforce strict client-side security standards, including secure payload sanitization, Content Security Policies (CSP), PCI-DSS compliance requirements, and safe handling of sensitive auth tokens.
- Web Vitals &
- Latency Control: Optimize Core Web Vitals, eliminate memory leaks in long-running trading sessions, minimize bundle sizes, and streamline component re-renders during high-volume market volatility.
- Offline Resilience: Implement intelligent caching layers, optimistic UI updates, and idempotent transaction submission patterns to prevent duplicate payments or state desynchronization during network instability.
- Engineering Excellence &
- Collaboration
- Testing &
- Quality Assurance: Write comprehensive unit, integration, and end-to-end tests using Jest, React Testing Library, and Cypress or Playwright, with a strong emphasis on financial calculation precision.
- Code Reviews &
- Mentorship: Conduct rigorous code reviews, mentor mid-level and junior frontend developers, and establish high standards for frontend code quality and architecture.

Comprehensive Tech Stack &

- Technical RequirementsCore Technical Stack

- Languages &
- Core Skills: Advanced TypeScript, JavaScript (ES6+), HTML5, CSS3 / Tailwind CSS / SASS.
- Frameworks &
- State Management: React.js, Next.js, Redux Toolkit / Zustand / React Query (TanStack Query).
- Data Visualization: High-performance charting libraries (TradingView Lightweight Charts, D3.js, Chart.js) for financial graphs and candlestick charts.
- Build Tools &
- Testing: Vite, Webpack, Babel, Jest, Cypress, Playwright, Git, CI/CD pipelines.
- Communication Protocols: REST APIs, GraphQL, secure WebSockets, Server-Sent Events (SSE).

Experience &

- Educational Qualifications

- Experience:



5 to 8 years of skilled software engineering experience, with at least 3+ years focused exclusively on building complex fintech web applications, banking portals, payment gateways, or trading terminals.
- Education: Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related engineering discipline from a premier institution (IITs, NITs, IISc, or top-tier universities).
- Domain Exposure: Prior experience working with payment aggregators, neo-banking platforms, brokerage systems, or enterprise SaaS billing engines is a strong advantage.

Competencies &
- Behavioral Traits

- Zero-Defect Mindset: An uncompromising commitment to correctness, edge-case handling, and precision in financial calculations and data display.
- Security Awareness: Deep intrinsic awareness of web vulnerability vectors (XSS, CSRF, injection attacks) and how to mitigate them on the client side.
- Autonomous Execution: Comfortable taking ownership of complex architectural initiatives from technical design specifications to production release.

What We Offer
- High-Impact Ownership: Direct control over the visual and transactional experience of financial software handling high-volume monetary transfers across global markets.
- Advanced Tech Environment: Freedom to work with bleeding-edge web frameworks, secure embedding protocols, and real-time charting architectures.
- Competitive Remuneration: Industry-leading compensation packages, comprehensive health benefits, and generous ESOP options.

Professional Interview Process
- Initial Screening: Discussion covering frontend architecture patterns, state management strategies for financial data, and past project scale.
- Frontend System Design Round: Collaborative architecture exercise designing a secure payment checkout widget or a real-time trading dashboard.
- Live Coding &
- Code Review: Assessment focusing on advanced TypeScript, handling asynchronous financial transactions, and component optimization.
- Leadership &
- Culture Fit: Conversation with engineering leadership focusing on code quality standards, security discipline, and cross-functional ownership.

Skills: tanstack,webpack,git,es6,playwrite,react.js,fintech,vite,jest,d3.js,security,redux,babel,next.js,saas,advanced typescript,css,zustland,architecture,tailwind css,rest api

📌 Senior Frontend Engineer — Fintech Payment Gateways & Trading Terminals (Gurugram)
🏢 HYrEzy Tech Solutions
📍 Gurugram