Sr Front End Developer

You’ll bring strong experience building production-grade interfaces with vanilla JavaScript, HTML, and CSS, a solid understanding of modern web standards and performance optimization, and hands-on expertise leveraging AI-powered development tools to accelerate delivery., * Lead the design, development, and maintenance of front-end components and features integrated into Adobe Edge Delivery Services (EDS)

• Build performant, accessible, and responsive interfaces using vanilla JavaScript, HTML5, and CSS3
• Define front-end standards, best practices, and patterns; lead code reviews and mentor mid-level and junior engineers
• Optimize page performance against Core Web Vitals and Lighthouse benchmarks
• Collaborate with back-end engineers to integrate APIs and data services delivered by the client’s Market Data team
• Leverage AI-powered tools (Claude, Gemini, ChatGPT, GitHub Copilot, etc.) to accelerate development, code review, and quality assurance
• Partner with UX/UI designers to translate designs into pixel-perfect, accessible implementations

• Advanced English skills with strong communication abilities (will interact directly with U.S.-based stakeholders).
• Self-motivated, proactive, and comfortable operating in fast-paced delivery environments.
• Thrives in collaborative, multicultural teams while maintaining strong individual ownership.
• Excellent analytical, problem-solving, and technical decision-making skills.
• Strong sense of accountability and product ownership.

Technical Requirements

• 5+ years of professional experience in front-end development
• Deep hands-on expertise with vanilla JavaScript (ES6+), HTML5, and CSS3
• Strong understanding of web performance, accessibility (WCAG), and responsive design
• Hands-on experience using AI tools (Claude, Gemini, ChatGPT, GitHub Copilot, Cursor) in day-to-day development
• Experience with Git and modern branching workflows
• Experience integrating with RESTful APIs and handling authentication, error states, caching, and pagination
• Proven experience leading front-end initiatives, mentoring engineers, and driving code-quality standards
• Nice to have: experience with Adobe Edge Delivery Services (EDS) or Adobe Experience Manager (AEM)
• Nice to have: experience with modern JS frameworks (React, Vue) - useful context, not required
• Nice to have: front-end testing experience (Jest, Cypress, Playwright)
• Nice to have: experience working with financial data, market data, or capital markets platforms

Perks & Benefits working at Kopius!

• Results-Driven Culture: 100% remote, outcome-focused projects!
• Continuing Education: Ongoing training, workshops, and sponsored courses
• Career Growth: Abundant opportunities for development and advancement
• Language Learning: Online English classes to boost communication skills
• Referral Bonuses: Rewards for referring new talent
• The Box - Quarterly: Curated snack boxes and company swag every three months
• Keep Moving: Reimbursement for physical activity memberships

• Foster Community and Connection through teamwork and collaboration
• Create Exceptional Experiences by aligning communication and actions with excellence
• Embrace New Ideas, staying curious and adaptable
• Take Ownership, showing initiative and accountability
• Always Walk the Talk, upholding integrity in everything they do

We are seeking a Sr Front End Developer who can champion code quality, performance, and customer experience, helping the team deliver fast, accessible, and maintainable web experiences on Adobe Edge Delivery Services (EDS). This role supports a leading global derivatives marketplace headquartered in Chicago - an organization that operates some of the world’s largest futures and options exchanges across interest rates, equity indexes, FX, energy, metals, and agricultural commodities. You’ll work on a high-visibility platform that surfaces market data and exchange content to institutional clients, traders, and partners around the world., At Kopius, we’re passionate about technology and committed to helping our partners innovate. With expertise in digital strategy, design, and engineering, our global team of nearly 600 professionals works on 40+ active projects worldwide. We thrive on solving complex challenges and building the future through thoughtful, high-impact digital solutions., © 2026 Careerjet All rights reserved