Remote Contract: Senior Staff Software Engineer, Web Platform

Description:

• Upwork is seeking a Senior Staff Software Engineer for their Web Platform team to lead the design and development of next-generation web architecture.
• The role involves empowering teams across Upwork to build dynamic, agent-driven user interfaces with speed and confidence.
• The engineer will define how the platform supports modular, performant, and scalable frontend experiences.
• Responsibilities include architecting and building modular frontend infrastructure with hybrid rendering to support dynamic AI-native UIs.
• The engineer will lead the development of an app shell model for federated delivery of horizontal micro frontends across teams.
• They will develop and evangelize AI toolkit components for common interaction patterns to be reused across the platform.
• The position requires setting technical direction and collaborating with platform leads, design systems, and developer tooling teams.
• The engineer will evaluate and scale frameworks that align with emerging LLM agent SDKs and support agentic UI flows.
• Mentoring engineers and contributing to technical leadership through architecture reviews and design discussions is also part of the role.
• Collaboration with Product, Design, and Infrastructure teams is essential to align platform capabilities with user-facing needs.

Requirements:

• Candidates must have 8+ years of experience in frontend development with deep knowledge of modern frameworks such as React, Vue, and Next.js.
• A strong understanding of web architecture principles, including security by design and server/client rendering paradigms, is required.
• Experience in designing for runtime UI composition and shared component governance is necessary.
• Candidates should have deep knowledge of building for performance at scale, including modular loading and edge delivery.
• A passion for AI-native patterns and familiarity with LLM SDKs and AI UI concepts is a plus.
• A proven track record of leading architectural transitions in complex product ecosystems is essential.
• Excellent communication and collaboration skills, especially in cross-team roles, are required.

Benefits:

• Upwork is committed to fostering a diverse and inclusive workforce, ensuring no discrimination based on various protected characteristics.
• A criminal background check may be conducted after a conditional offer is made, in compliance with applicable laws.
• Qualified applicants with arrest or conviction records will be considered in accordance with the California Fair Chance Act and local ordinances.
• Upwork provides a supportive environment for skilled professionals to innovate their careers and gain control over their work.