Senior Software Engineer, Frontend

About Sift Sift is the data infrastructure platform for hardware engineering teams. Sift turns high-frequency telemetry into engineering insights for mission-critical systems. Teams use Sift to build and operate rockets, satellites, autonomous vehicles, energy systems, defense platforms, and more. Founded by former SpaceX engineers who built the tools behind Dragon and Starlink, Sift is building the data infrastructure to herald the AI era for physical systems. In This Role, You'll: Build high-performance data visualization interfaces and reusable component libraries for complex telemetry data Create intuitive user interfaces for data exploration while optimizing for large real-time datasets Collaborate with backend teams on API design and implementation for seamless user experiences Write clean, maintainable code and participate in technical design discussions The Skillset You'll Bring: 5+ years of professional experience building web applications and data-driven tools Strong experience building production applications with technologies like React, NextJS, and TypeScript Strong understanding of web performance optimization and browser rendering Experience with modern CSS (Tailwind) and component libraries (Radix UI) for building design systems Bonus Points: Experience with technical visualization tools (WebGL, D3.js, Apache ECharts) and time-series data Knowledge of WebAssembly and browser-based computation Background in scientific computing or technical data visualization Experience building tools for technical users (dashboards, data-editing environments) Built and launched side projects with consistent usage traffic Engineering At SIFT: You'll have the opportunity to help evolve and scale our platform because we're still in the early stages of building the product. Relevant technologies include: Web frontend & backend: React, TypeScript, Redux, Tailwind, WebAssembly, D3.js, WebGL, and Go Data : Parquet, Flink, Kafka, Redpanda, Beam, DuckDB, Timescale, QuestDB, InfluxDB, and Druid Infrastructure: GitHub Actions, AWS, Azure, GCP, Docker, Kubernetes, and Terraform Location: Sift’s headquarters is in Marina Del Rey, CA (Next to LAX). We collaborate in person twice a week—on Mondays and Thursdays —and come together for a full week every two months. We are open to relocating candidates to LA or working from our San Francisco office for the right candidate. Salary range: $180,000 - $230,000 per year. Plus equity and benefits. Eligibility: U.S. Person Required : Must be a U.S. citizen, lawful permanent resident, or protected individual such as an asylee or refugee in compliance with ITAR (International Traffic in Arms Regulations) / EAR (Export Administration Regulations) regulations.