Sr. Front-End Engineer (W2)

Join to apply for the Sr. Front-End Engineer (W2) role at Braintrust 1 day ago Be among the first 25 applicants Join to apply for the Sr. Front-End Engineer (W2) role at Braintrust Must be able to work 3 days a week on site (either LA or Irvine offices) Must be able to work under a W2 contract. Job Description Long term contract until July 2025. Must be able to work 3 days a week on site (either LA or Irvine offices) Must be able to work under a W2 contract. We are looking for a senior level front-end engineer to join our vibrant and high-performing team. We are completely overhauling the investor website that is used by millions of individual investors and tens of thousands of financial advisors across the U.S. Our front-end is built on React and sits on top of a RESTful service layer with the whole set up running on AWS. A collaborative React ninja with experience in building high-performing public facing transactional applications will be welcomed to our team. Join us. Responsibilities & Duties: Work with product managers and other subject matter experts to validate requirements and related designs. Collaborate with UX designers to inform implementation and identify opportunities for componentization. Identifying, defining, and grooming of developer stories in collaboration with product owners/scrum master to prioritize and plan. Implementation of re-usable components and reference implementations (when needed). Collaborate with back-end engineers to design and agree upon on experience layer APIs. Work with QA / test team to define and develop test plans, suites, cases. Proactively ensure individual code quality (e.g., well organized, scalable, good component composition, etc.). Regularly conduct PRs / code reviews within the feature team to ensure broader code quality. May conduct some level of testing (e.g., unit testing, integration testing). Troubleshooting, eliminating bugs / defects, and making optimizations throughout the application lifecycle. Contributing to documentation throughout the application lifecycle (when needed). Occasionally develop prototypes and conduct proofs of concept. Qualifications & Skills At least 7 years of experience in software engineering / app development. Experience building and supporting public facing transactional web applications preferred. Experience in banking, financial services, or e-commerce industry preferred. Undergraduate degree in computer science, engineering, or another technical field Must Haves: Proficiency in modern JavaScript (ES6+), including concepts like closures, promises, async/await, and modules. Proficiency in React and its core concepts, including JSX, event handling, component lifecycle methods, and hooks. Understanding of React state management, API handling, react-redux patterns, and the Vite testing suite ReactJS frameworks, libraries, and developmental tools such as MaterialUI, Vitest, and Storybook, as well as working from design applications such as Zeplin. Interacting with RESTful APIs involves understanding best practices for efficiently fetching and handling data to ensure optimal performance and user experience. Using various tools and libraries to mock data and methods in a testing environment, such as Vite, Jest, and MSW (Mock Service Worker), and a comfort level using tools like Postman for advanced mocking scenarios. Proficiency in advanced CSS techniques, including CSS-in-JS. Must have experience with this pattern/approach, as it differs significantly from writing traditional stylesheets. Ensuring code quality with test case management tools and other utilities (e.g., linting tools) Proficiency in Git and Git concepts, including creating and managing pull requests, and conducting thorough pull request reviews. Proficiency in TypeScript, including a strong understanding of interfaces, types, generics, and advanced type features. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Engineering and Information Technology Industries Technology, Information and Internet Referrals increase your chances of interviewing at Braintrust by 2x Get notified about new Senior Frontend Developer jobs in Los Angeles, CA . Los Angeles, CA $160,000.00-$190,000.00 1 month ago Senior Software Engineer (Gameplay/Audio) - Unpublished R&D Product Culver City, CA $151,300.00-$261,500.00 2 weeks ago Sr. Software Engineer - Marketing (SFMC) Beverly Hills, CA $128,000.00-$160,000.00 1 week ago Senior Software Engineer — Slicer & Manufacturing Platform Development Los Angeles, CA $120,000.00-$145,000.00 3 weeks ago Sr Software Engineer (Industrial Automation) Long Beach, CA $165,000.00-$211,000.00 1 week ago Senior Software Engineer Physics-Based Simulation (GPU) Santa Monica, CA $142,516.00-$199,870.00 1 month ago Glendale, CA $138,900.00-$203,900.00 2 months ago Glendale, CA $138,900.00-$186,200.00 1 month ago Glendale, CA $138,900.00-$203,900.00 2 weeks ago Senior Software Engineer - Front End/Roku Santa Monica, CA $145,400.00-$195,000.00 8 months ago Los Angeles, CA $150,000.00-$180,000.00 3 weeks ago West Hollywood, CA $195,000.00-$215,000.00 2 weeks ago Glendale, CA $138,900.00-$186,200.00 3 weeks ago Glendale, CA $138,900.00-$203,900.00 2 months ago Glendale, CA $138,900.00-$203,900.00 1 month ago Los Angeles, CA $115,000.00-$125,000.00 3 weeks ago Pasadena, CA $125,000.00-$185,000.00 1 year ago Burbank, CA $138,900.00-$186,200.00 3 months ago Glendale, CA $138,900.00-$186,200.00 1 month ago Santa Monica, CA $138,900.00-$203,900.00 3 weeks ago Burbank, CA $138,900.00-$186,200.00 1 month ago Senior Software Engineer, Platform Engineering Glendale, CA $136,038.00-$182,490.00 2 weeks ago Glendale, CA $138,900.00-$186,200.00 1 month ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr Brain Trust Inc