Senior Front End Engineer
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Job Description
Senior Frontend Engineer building customer-facing features for Invaluable’s online antiques, fine art, and collectibles auction marketplace. Modernizing frontend systems with React, testing, and AI-assisted engineering.
Responsibilities:
- Build and ship features end-to-end across any tier of the Invaluable platform, from implementation through testing and deployment
- Refactor legacy Backbone, Handlebars, and jQuery areas and reduce technical debt
- Diagnose production issues, fix bugs, and improve user experience with measurable outcomes
- Drive frontend architecture, standards, tooling, and conventions
- Use AI tools to plan, build, test, debug, review, and document work
- Raise team AI fluency by sharing workflows and building reusable context, prompts, skills, and MCP integrations
- Collaborate through pairing, code reviews, and shared problem-solving across time zones
- Mentor and support engineers through best-practice sharing, feedback, and technical leadership
- Partner with Product and Design to clarify requirements, scope work, identify tradeoffs, and deliver high-quality user experiences
- Champion inclusive teamwork
Requirements:
- 5–7+ years of professional frontend engineering experience (or equivalent practical experience)
- Strong proficiency with JavaScript and modern frontend development practices
- Significant production experience with React, ideally Redux
- Experience working in Node/Express environments
- Comfort working in and improving legacy codebases such as Backbone, Handlebars, and jQuery
- Experience writing and maintaining React Testing Library unit tests and Cypress end-to-end tests
- Daily hands-on use of AI coding tools, preferably Claude / Claude Code or comparable tools
- Practical understanding of LLM context, prompting, hallucinations, and limitations
- Disciplined verification of AI-generated code
- Sound data-handling judgment when using AI
- Strong technical judgment and ability to explain tradeoffs
- Collaborative approach to pairing, code reviews, and knowledge sharing
- Experience with ecommerce or marketplace products (preferred)
- Familiarity with UI systems, Figma, design systems, and accessibility (preferred)
- Experience improving frontend performance and observability in production (preferred)
- Experience with agentic AI workflows and context engineering (preferred)
- Track record of measurable productivity or quality gains from AI adoption (preferred)
- BA/BS in a STEM-related field and 5–7 years of related experience, or equivalent combination of education and professional experience
Benefits:
- Profit share bonus
- 100% remote work for the entire company
- Health care insurance
- Dental insurance
- Vision insurance
- Life insurance
- Disability insurance
- 401(k) matching
- Tuition Reimbursement
- Employee assistance plan
- Paid parental leave
- Approachable leadership
- A great team of smart, supportive people
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