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 dataCreate intuitive user interfaces for data exploration while optimizing for large real-time datasetsCollaborate with backend teams on API design and implementation for seamless user experiencesWrite 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 toolsStrong experience building production applications with technologies like React, NextJS, and TypeScriptStrong understanding of web performance optimization and browser renderingExperience 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 dataKnowledge of WebAssembly and browser-based computationBackground in scientific computing or technical data visualizationExperience 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 DruidInfrastructure: 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.