Job Description

Overview:

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.



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.


In This Role, You Will::
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.

Here's What You Need::
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



LinkedIn Remote Type: #LI-Hybrid Indeed Remote Type: N/A