Hybrid Senior Frontend Engineer

at Cornspring

• Job title: Senior Frontend Engineer
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Cloud, JavaScript, React, TypeScript
• Location requirements: Hybrid, Singapore

About the role

• Senior Frontend Engineer developing sophisticated data manipulation interfaces and web applications powered by AI at a FinTech startup. Collaborating with teams to deliver exceptional user experiences in Excel and web platforms.

Responsibilities

• You will be responsible for developing sophisticated data manipulation interfaces using TypeScript within the Microsoft Office Add-in ecosystem while also creating intuitive web applications where clients interact with their data using AI.
• You will design, build, and maintain high-performance Excel Add-ins using TypeScript and Office.js, tailored for internal Microsoft 365 deployment.
• You will develop and scale web interfaces for our AI solutions, data visualization, and reporting.
• You will work closely with our Backend team to ensure seamless integration with our cloud services while delivering exceptional user experiences in both Excel and our React-based web portal.
• You will contribute to architectural decisions, component libraries, and development best practices.
• You will support cross-team coordination around security, testing, deployment, and CI/CD pipelines.

Requirements

• This role is perfect for someone who enjoys building robust user experiences that bridge traditional productivity tools (like Excel) with modern, responsive web apps; and who is excited by the opportunity to work with AI and financial data.
• This role requires strong expertise in modern UI development practices and professional frontend development experience with JavaScript, React and TypeScript.
• You will need deep understanding of data visualization, REST API integration, and responsive design principles.
• Experience handling authentication flows (e.g., OAuth), and managing async data interactions.
• Strong understanding of frontend performance optimization, state management, and cross-environment compatibility.
• Experience working in Agile teams, with a proactive and ownership-driven mindset.
• Experience building and deploying Office Add-ins, especially within Microsoft 365 for internal enterprise use, would be strong advantage.

Benefits

• Competitive salary and benefits.
• Hybrid working: 2 days per week at the office.
• An opportunity to work at the forefront of AI-driven finance, tackling genuinely complex and high-impact challenges.
• Hands-on exposure to advanced ML, LLM, and data technologies within real production systems.
• A collaborative, high-ownership start-up environment offering exceptional learning opportunities.
• The chance to help shape the future of Family Office and Asset Management technology.