Senior UI Developer – React AI

Sophos; United States; Remote; USD 125,000 - 209,000; Full time

Job summary

A leading cybersecurity company is seeking a Senior UI Developer to design intuitive and high-performance user interfaces. This role involves collaboration with product managers, designers, and engineers to enhance AI-based security tools. Ideal candidates will have expertise in React, Angular, and UI architecture, and a passion for user experience.

Qualifications

• 4+ years of experience in building complex UI workflows.
• Deep expertise in React and Angular.
• Strong fundamentals in CSS, JS, and design patterns.

Responsibilities

• Build and maintain scalable, responsive user interfaces using React.
• Drive cross-functional outcomes and translate UX designs into high-quality interfaces.
• Lead front-end architecture decisions and UI performance optimization.

Skills

React

Angular

JavaScript

TypeScript

CSS

UI architecture

Job description

About Us

Sophos is a global leader and innovator of advanced security solutions for defeating cyberattacks. The company acquired Secureworks in February 2025, bringing together two pioneers that have redefined the cybersecurity industry with their innovative, native AI-optimized services, technologies and products. Sophos is now the largest pure-play Managed Detection and Response (MDR) provider, supporting more than 28,000 organizations. In addition to MDR and other services, Sophos’ complete portfolio includes industry-leading endpoint, network, email, and cloud security that interoperate and adapt to defend through the Sophos Central platform. Secureworks provides the innovative, market-leading Taegis XDR/MDR, identity threat detection and response (ITDR), next-gen SIEM capabilities, managed risk, and a comprehensive set of advisory services. Sophos sells all these solutions through reseller partners, Managed Service Providers (MSPs) and Managed Security Service Providers (MSSPs) worldwide, defending more than 600,000 organizations worldwide from phishing, ransomware, data theft, other every day and state-sponsored cybercrimes. The solutions are powered by historical and real-time threat intelligence from Sophos X-Ops and the newly added Counter Threat Unit (CTU). Sophos is headquartered in Oxford, U.K. More information is available at www.sophos.com.

Role Summary

We’re looking for a Senior UI Developer with deep expertise in React and Angular to join our dynamic team. You’ll be building intuitive, high-performance UIs that power cutting-edge AI experiences — from LLM-based assistants to smart security agents.

This is a hands-on engineering role. You’ll work closely with product managers, designers, and AI/ML engineers to deliver seamless, elegant interfaces that simplify complex cybersecurity workflows. Your frontend skills will directly shape how users interact with our AI-driven tools.

What You Will Do

• Build and maintain scalable, responsive user interfaces using React (and some Angular) to support AI-driven cybersecurity tools
• Drive outcomes working cross-functionally with product managers, designers, and ML engineers to turn complex ideas into intuitive UI workflows
• Translate UX designs and prototypes into high-quality, automation powered testing, using JavaScript, TypeScript, and modern CSS
• Lead and drive front-end architecture decisions, component design patterns, and UI performance optimization within the team
• Leveraging LLMs and LLM powered tools to accelerate your own development and helping team adopt

What You Will Bring

• Must have 4+ years of experience building complex UI workflows with React
• Must have React, Angular, JavaScript/TypeScript, and UI architecture
• Writes clean, maintainable, testable code with strong fundamentals in CSS, native JS, and design patterns
• Demonstrates ownership, a bias for action, and a high bar for quality and UX
• Can work independently, unblock others, and mentor junior developers
• Enjoys solving problems fast but thoughtfully, with strong judgment and curiosity
• Is open to working across the stack — from wireframes to devops and backend contracts
• Cares deeply about end users and building delightful, usable interfaces
• Embraces AI as a way to accelerate and improve software development

In Canada, the base salary for this role ranges from $125,000 to $209,000. In addition to base salary, we offer additional compensation including bonus eligibility and a comprehensive benefits package. A candidate’s specific pay within this range will depend on a variety of factors, including job-related skills, training, location, experience, relevant education, certifications, and other business and organizational needs.

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Ready to Join Us?

At Sophos, we believe in the power of diverse perspectives to fuel innovation. Research shows that candidates sometimes hesitate to apply if they don't check every box in a job description. We challenge that notion. Your unique experiences and skills might be exactly what we need to enhance our team. Don't let a checklist hold you back –we encourage you to apply.

What's Great About Sophos?

· Sophos operates a remote-first working model, making remote work the primary option for most employees. However, some roles may necessitate a hybrid approach. Please refer to the location details in our job postings for further information.

· Our people – we innovate and create, all of which are accompanied by a great sense of fun and team spirit

· Employee-led diversity and inclusion networks that build community and provide education and advocacy

· Annual charity and fundraising initiatives and volunteer days for employees to support local communities

· Global employee sustainability initiatives to reduce our environmental footprint

· Global fitness and trivia competitions to keep our bodies and minds sharp

· Global wellbeing days for employees to relax and recharge

· Monthly wellbeing webinars and training to support employee health and wellbeing

Our Commitment To You

We’re proud of the diverse and inclusive environment we have at Sophos, and we’re committed to ensuring equality of opportunity. We believe that diversity, combined with excellence, builds a better Sophos, so we encourage applicants who can contribute to the diversity of our team. All applicants will be treated in a fair and equal manner and in accordance with the law regardless of gender, sex, gender reassignment, marital status, race, religion or belief, color, age, military veteran status, disability, pregnancy, maternity or sexual orientation. We want to give you every opportunity to show us your best self, so if there are any adjustments we could make to the recruitment and selection process to support you, please let us know.

Data Protection

If you choose to explore an opportunity, and subsequently share your CV or other personal details with Sophos, these details will be held by Sophos for 12 months in accordance with our Privacy Policy and used by our recruitment team to contact you regarding this or other relevant opportunities at Sophos. If you would like Sophos to delete or update your details at any time, please follow the steps set out in the Privacy Policy describing your individual rights. For more information on Sophos’ data protection practices, please consult our Privacy Policy Cybersecurity as a Service Delivered | Sophos