Senior Writer, Copy Editing

2 Months ago • 5-7 Years • Editorial

Job Summary

Job Description

The Senior Production Writer will be a key player, ensuring projects move smoothly from the creative team to production. Responsibilities include proofreading, updating copy, performing quality assurance checks, writing SEO and AX copy, collaborating with various teams to execute projects, managing workflow, and maintaining processes. The ideal candidate will have experience in copy flow management, strong editing skills, knowledge of the creative development process, and exceptional attention to detail.
Must have:
  • 5-7 years of experience in copy flow.
  • Strong copy-editing skills and adherence to style guides.
  • Deep knowledge of the creative development process.
  • Exceptional attention to detail and multitasking abilities.

Job Details

We’re looking for a creative, self-starting Senior Production Writer who thrives in a fast-paced environment, adapts quickly, and can work independently with minimal supervision. This role requires a mix of organizational skills, attention to detail, and the ability to collaborate with marketing and brand teams. You’ll manage deadlines, foresee potential roadblocks, and make sound decisions under pressure.

As a Senior Production Writer, you’re the bridge between our creative team and the production department. You’ll keep projects moving smoothly, ensuring deadlines are met and client standards are exceeded while working with a team of writers, designers, editors, creative producers, and creative directors to produce deliverables across several channels. 


You Will:

  • Proofread and update copy decks, ensure design comps match copy, and perform QA checks during staging and post-launch.
  • Write SEO and AX copy and handle change requests.
  • Collaborate with copywriters, editors, designers, and marketing teams to execute projects.
  • Manage the workflow of copy and assets, ensuring they meet client standards.
  • Partner with creative leadership to maintain processes and deadlines.
  • Participate in post-launch analysis and apply findings to improve future projects.
  • Define best practices for content handoffs in collaboration with other teams.

You Have:

  • 5-7 years of experience ensuring smooth copy flow between creative and production teams.
  • Strong copy-editing skills, with an eye for consistency and adherence to style guides.
  • Deep knowledge of the creative development process and the ability to collaborate effectively with cross-functional teams.
  • A passion for editing and delivering well-crafted messaging.
  • Exceptional attention to detail, multitasking abilities, and the flexibility to handle changing schedules.
  • Strategic thinking and the ability to manage multiple priorities.
  • A positive, solution-oriented attitude and eagerness to learn from others.
  • A strong understanding of digital production tools and the ability to learn new ones quickly.

Our new hires & employees are the future of our organization, and we want to set you up for long-term success.  In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.

Critical Mass is an equal opportunity employer. 

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.

If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx 

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About The Company

Critical Mass is a team of 1,800 inspired folks based in 12 offices around the world, providing full-service digital capabilities for the greatest brands on Earth. Our secret sauce is our uncompromising design standards, our relentless focus on customers, and an ability to put powerful new technologies to work for our clients.


We work with the best—Apple, Nike, Mars Wrigley, Nissan, Diageo, Airbnb, BMW, BNY Mellon, Johnson & Johnson, and many more—brands who strive for connected digital ecosystems and unparalleled experiences. We help them get there by gaining deep insight into their consumers and orchestrating data, AI, design, media, and tech stacks around human stories.


We’re a global agency founded in Canada, but digital is our home. If you know us, then you know we’re a special, quirky place that attracts big talent and tiny egos. (We actually give out a “so f-n nice” award—lots of them). But just because we’re friendly doesn’t mean we’re not a force to be reckoned with. We’re driven. Relentless. And we live our values. We’re Critical Mass, but our friends call us CM. Please call us CM!

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