Sr Web Developer Jobs in California (NOW HIRING)

Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading.

The the company Legend team builds and owns our advanced desktop trading platform, designed to meet the needs of active and sophisticated traders. The team works across real-time data infrastructure, advanced charting, options and futures trading tools, and highly customizable workspace experiences. Their mission is to deliver a professional-grade platform that combines the power of institutional trading tools with the company's signature approachable design.

As a Senior Web Engineer, performance is your mandate. You'll set the standard for what a web-based trading platform can be — going deep on JavaScript internals, browser rendering pipelines, and real-time data optimization to make Legend the fastest, most responsive platform of its kind. For active traders, milliseconds matter, and you'll own the work that ensures Legend never gets in their way.

This is a performance-first role. You'll lead the initiatives that make Legend faster and more efficient, while also contributing to feature development across core trading surfaces where your performance expertise has the greatest impact. The work balances deep technical execution with meaningful cross-functional partnership.

This role is based in our Menlo Park, CA or New York, NY office(s), with in-person attendance expected at least 3 days per week.

At the company, we believe in the power of in-person work to accelerate progress, spark innovation, and strengthen community. Our office experience is intentional, energizing, and designed to fully support high-performing teams.

• Lead web performance across Legend — profiling, diagnosing, and shipping measurable improvements to speed, responsiveness, and runtime efficiency platform-wide
• Go deep on JavaScript internals, browser rendering pipelines, and real-time data handling to deliver a best-in-class experience for active traders
• Build and optimize high-frequency, real-time UI components that handle streaming market data without compromising frame rate or user experience
• Establish performance benchmarks and monitoring systems that create a repeatable, lasting standard for the team
• Drive a performance-first culture through code reviews, technical documentation, and engineering standards
• Contribute to end-to-end feature development across Legend's core trading surfaces, applying your performance expertise where it matters most
• Partner with product, design, and backend engineers to deliver polished, reliable experiences at scale
• Participate in roadmap planning and help scope technical work, balancing feature delivery with ongoing platform health

• 5+ years of experience in web development with a focus on infrastructure, tooling, or platform engineering.
• Strong programming skills inJavaScript, TypeScript, and at least one other language.
• Experience working on or closely with frontend infrastructure, CI/CD pipelines, build systems, or internal tools.
• Demonstrated ability to reduce developer friction and increase engineering productivity through technical solutions.
• Comfortable working in complex developer ecosystems with hundreds of developers as stakeholders (experience with Bazel or similar build tools is a plus).
• A mindset for building meta-level systems and tools that make other engineers more effective.

• Market competitive and pay equity-focused compensation structure
• 100% paid health insurance for employees with 90% coverage for dependents
• Annual lifestyle wallet for personal wellness, learning and development, and more!
• Lifetime maximum benefit for family forming and fertility benefits
• Dedicated mental health support for employees and eligible dependents
• Generous time away including company holidays, paid time off, sick time, parental leave, and more!
• Lively office environment with catered meals, fully stocked kitchens, and geo-specific commuter benefits

Our team is here to enable an inclusive and welcoming interview experience for all candidates. If you need additional assistance throughout the interview process related to a physical or mental condition, or if there is something our team can do to enable a more accessible experience at any time, please notify our team by completing the Applicant Accommodation Form.

In addition to the base pay range listed below, this role is also eligible for bonus opportunities + equity + benefits.

Base pay for the successful applicant will depend on a variety of job-related factors, which may include education, training, experience, location, business needs, or market demands. The expected base pay range for this role is based on the location where the work will be performed and is aligned to one of 3 compensation zones. For other locations not listed, compensation can be discussed with your recruiter during the interview process.

Base Pay Range:

Zone 1 (Menlo Park, CA; New York, NY; Bellevue, WA; Washington, DC)

$196,000 – $230,000 USD

Zone 2 (Denver, CO; Westlake, TX; Chicago, IL)

$172,000 – $202,000 USD

Zone 3 (Lake Mary, FL; Clearwater, FL; Gainesville, FL)

$153,000 – $179,000 USD

Click here to learn more about our Total Rewards, which vary by region and entity.

If our mission energizes you and you’re ready to build the future of finance, we look forward to seeing your application.

The company provides equal opportunity for all applicants, offers reasonable accommodations upon request, and complies with applicable equal employment and privacy laws. Inclusion is built into how we hire and work—welcoming different backgrounds, perspectives, and experiences so everyone can do their best. Please review the Privacy Policy for your country of application.