Senior Software Engineer II - Video Editor

Goldcast (a Cvent company) is an AI-powered B2B Video Content Platform that enables marketers to put video content at the heart of the customer journey. We’re building a browser-based, frame-accurate video editor that rivals desktop apps, using cutting-edge tech like WebCodecs, WASM, and Remotion.

Founded in mid-2020 at Harvard Business School, we have 400+ customers across tech, professional services, manufacturing, and finance to deliver engaging video content & digital events.

Role Overview

As a Senior Software Engineer II specializing in video editing frameworks, you’ll lead our effort to build a frame-perfect, multi-track video editor in the browser, combining Remotion for UX and WebCodecs/WASM for low-level video processing . You will extend Remotion’s React layer for UX to enable professional-grade editing features (precise cuts, real-time previews, GPU-accelerated effects) while navigating browser limitations.

What You’ll Do

• Lead the architecture and development a frame-perfect browser-based video editing framework (supporting cuts, transitions, and multi-track compositing).
• Design and implement real-time previews using WebGL, OffscreenCanvas, or WebCodecs that mirror final rendering pixel-perfectly.
• Identify performance bottlenecks and optimize rendering pipelines, with particular attention to input latency and animation fluidity
• Integrate WebAssembly (WASM) for performance-critical tasks such as frame-accurate video decoding, image processing and audio syncing.
• Design the timeline core (playhead scrubbing, layer stacking, non-destructive edits).
• Architect a component system on top of Remotion to bypass its limitations for core video processing.
• Develop tools to measure and enforce frame-perfect exports (e.g., automated diffing between preview and render).
• Solve browser-specific challenges (memory limits, GPU acceleration, audio/video sync drift).
• Collaborate with design and product teams to create intuitive video editing experiences
• Mentor other engineers on browser media APIs and performance optimization.

What We Seek

• 7+ years of frontend engineering experience with at least 2+ years in video/audio processing on the browser.
• Deep expertise in browser media APIs: WebCodecs, Web Audio, MediaStream, Canvas.
• Experience with frame-accurate video manipulation (e.g., FFmpeg.wasm, custom WebCodecs pipelines).
• Proven ability to optimize JavaScript/WebAssembly performance (e.g., reducing input latency, smoothing animations).
• Experience pushing Remotion or similar frameworks beyond its limits for performance critical tasks. e.g., replacing with WebCodecs, optimizing for multi-track editing.
• Experience building browser-based media editing or processing tools
• Shipped WASM-based video/audio tools to production (e.g., FFmpeg.wasm, Rust/C++ for WebAssembly).
• Experience with GPU acceleration and hardware-accelerated graphics in browser environments.

Preferred Qualifications

• Experience with WebGL/Canvas optimizations for real-time video previews.
• Knowledge of video codecs (H.264, VP9) and compression algorithms and browser encoding limitations.
• Experience working with HLS, WebRTC & FFmpeg.
• Deep understanding of performance challenges in browser environments (e.g., garbage collection pauses, GPU memory leaks)
• Experience with WebGL-based motion graphics (e.g., shaders for transitions, GPU-accelerated text animations).
• Familiarity with rendering loops, frame timing, and smooth animation techniques
• Built developer tools for performance profiling (e.g., frame timings, memory snapshots).

This role isn’t a fit if you:

• Prefer working with stable APIs (we’re pioneering uncharted browser capabilities).
• Haven’t debugged frame drops or audio drift in a media app.

What We Offer

• Greenfield opportunity to define the architecture of a bleeding-edge browser video stack.
• Work with rare expertise (WebCodecs, WASM, Remotion internals) at scale.
• Opportunity to work with a best-in-class product, engineering, and design team
• An incredible culture blending innovation, collaboration, and technical excellence
• Competitive salary and benefits package
• Hybrid work environment