Senior JavaScript Engineer (SuperDoc)

About SuperDoc

SuperDoc is an open source document editor bringing modern DOCX editing and advanced collaboration to the web.

We care a lot about building simple, beautiful document experiences that teams can self-host, extend, and trust. Our editor powers real-time collaboration, dynamic LLM-driven suggestions and actions, streamlined agentic workflows, and more. SuperDoc is already the editor platform of choice for a new wave of LegalTech and GovTech companies.

Under the hood, we dynamically bind MS Word OOXML to a ProseMirror schema in our editor JS library, and make it easy for customers to add their own features and AI actions on top. Any prior experience building/extending editors (ProseMirror, TipTap, Lexical, etc.) or parsing OOXML is a big bonus.

We’re a small engineering team that ships fast and works closely with our user community. SuperDoc is an Equal Opportunity Employer.

Location & Hours

• Location: Remote-friendly; San Francisco Bay Area preferred

• Schedule: Full-time, with core team collaboration hours between 9AM–1PM PT for team meetings, project deep-dives, and customer calls

• We’re a distributed team across time zones – we value clear communication/documentation and work synchronously when we’re not in those overlap hours

Experience

• Deep technical expertise in modern JavaScript (and ideally TypeScript)

• Passionate builder: you’ve started something from scratch (a startup, product, or meaningful project) or actively contribute to a community/OSS project

• Demonstrates compassion for the user and crafts helpful, intuitive solutions

• Learns from user and team feedback, and polishes-and-iterates a feature to excellence

• Strong communication and collaboration skills

Role & Responsibilities

You will be a core engineer building new editor capabilities that bring intelligent understanding, formatting, editing, and LLM-assisted actions into the document experience.

On a typical project, you might:

• Dive deep into MS Word OOXML parsing and mapping to ProseMirror nodes and marks

• Design and ship AI + editor integrations that help users draft and restructure complex documents

• Own features end-to-end: from talking to users, to designing APIs and UX, to shipping and iterating

• Collaborate directly with co-founders, sales, and customers to shape the roadmap

• Articulate to the team how involved technical decisions will drive business outcomes – including key trade-offs and the design choices made for project success and longer-term sustainability

• Champion the best practices in engineering, data security, and automated testing

This is an opportunity to modernize the document experience: reimagine high-volume document workflows on top of a modern and open editor platform.