Jobs at Critical Mass

Positions 735,996

Critical Mass is a San Francisco‑based data‑science powerhouse that builds real‑time analytics engines for the financial sector. Its flagship product, MassFlow, processes millions of transactions per second using a microservices architecture on Kubernetes. The company has earned recognition for its open‑source contributions to the Apache Arrow community and for securing a Series C round that valued it at over $1 billion.

Critical Mass hires full‑stack engineers, data scientists, DevOps specialists, product managers and security analysts. New hires expect rigorous peer‑review coding, cross‑functional sprint ceremonies, and a culture of continuous learning that includes quarterly hackathons and paid certifications. The company offers a remote‑first policy, a 100‑hour annual training budget, and a transparent equity grant program.

Job Transparency’s listings provide Critical Mass candidates with real‑time salary ranges, interview difficulty ratings and employee sentiment scores. By comparing the disclosed compensation against the market benchmark and reading recent reviews, applicants can negotiate better offers and choose roles that match their career goals.

Associate Copywriter

Company: Critical Mass

Location: New York City, NY

Posted Mar 18, 2023

The Trailhead program at Critical Mass is an epic journey for new hires, offering a 12-week learning journey in various aspects of the business. The role of an Associate Copywriter involves storytelling, collaboration, and strategic brainstorming. The company expects hybrid work from the Trailhead Talent on Tuesdays and Thursdays to foster continuous learning, collaboration, and employee engagement.

Freelance Art Director

Company: Critical Mass

Location: New York City, NY

Posted Mar 30, 2023

The text describes a Freelance Art Director role with creative development, client management, team leadership, and design skills requirements. The role involves strategic development, project management, mentoring, and collaboration with various teams and vendors. The candidate should have a strong design portfolio, team leadership experience, and knowledge of design software. The role is based in New York with a minimum of 3 days office work per week.

Digital Analytics Lead

Company: Critical Mass

Location: Chicago, IL

Posted Apr 05, 2023

The job description is looking for a Digital Analytics Lead with experience in marketing science, data visualization, and statistical modeling. The role requires leading a team of analysts, developing expertise in multiple areas, and ensuring client needs are met.

Art Direction Intern

Company: Critical Mass

Location: Los Angeles, CA

Posted Mar 28, 2023

Critical Mass' Trailhead Internship Program is a 12-week jump-start to your career with regular learning opportunities, mentorship, and real client work. The internship aims to integrate the intern into the team and support their career growth. The internship runs from May 23-August 11, 2023, and all applications are reviewed on a rolling basis. The intern will work as an Art Direction intern, developing concepts, communicating ideas, and contributing to project design and development. The intern will also build relationships with other CM creative and cross-discipline staff members and participate in strategic brainstorming, campaign development, and creative execution.

Associate Paid Search Strategist

Company: Critical Mass

Location: Chicago, IL

Posted Apr 01, 2023

The job posting is for a Paid Search Strategist role at Critical Mass, a company that offers a Trailhead program for its employees. The role involves managing Paid Search accounts, optimizing campaigns, and working with clients. The company emphasizes the importance of teamwork, continuous learning, and employee engagement.

Freelance Senior Designer, Digital

Company: Critical Mass

Location: Los Angeles, CA

Posted Mar 30, 2023

The job posting is for a Freelance Senior Designer position at Critical Mass, a company that values creativity, attention to detail, and teamwork. The role involves designing solutions that meet strategic objectives, managing projects, and guiding a team of designers. The company offers mentorship, a competitive hourly range, and a hybrid work model.

Senior Account Manager

Company: Critical Mass

Location: Chicago, IL

Posted Apr 03, 2023

The text describes a Senior Account Manager role at Critical Mass, focusing on client management, project leadership, and collaboration. The role requires 4+ years of experience, strong technical skills, and the ability to work with complex clients. The Talent Team encourages a hybrid work model for continuous learning, collaboration, and employee engagement.

Search Lead

Company: Critical Mass

Location: Other US Location

Posted Mar 31, 2023

The text describes a role in search marketing at Critical Mass, involving managing and growing a team, defining success metrics, pitching new projects, collaborating with multidisciplinary teams, delivering actionable insights, optimizing across channels, conducting SEO audits, and advising on technical website development. The role requires 6+ years of search experience, strong presentation skills, analytics skills, content strategy skills, and understanding of technical SEO. The position is a 4-month contract with a preference for in-office work 2 days a week.

Freelance Art Director

Company: Critical Mass

Location: Los Angeles, CA

Posted Mar 30, 2023

The job description is for a Freelance Art Director position at Critical Mass, a company that values creativity, leadership, and collaboration. The role involves developing concepts, communicating ideas, and leading a team of designers and writers. The company offers mentorship, training, and a competitive hourly range of $80-$85.

Internal Communication Coordinator

Company: Critical Mass

Location: Chicago, IL

Posted Mar 28, 2023

The Trailhead program is a unique opportunity for an ambitious self-starter to become an integral member of the Internal Communications team at Critical Mass. The position offers ample opportunities for job growth and creative ownership.

Marketing Science (Data Analytics) Intern

Company: Critical Mass

Location: Los Angeles, CA

Posted Mar 19, 2023

Critical Mass' Trailhead Internship Program is a 12-week jump-start to your career with regular learning opportunities, mentorship, and real client work. The intern will have the opportunity to try the digital agency world and assist in developing innovative products and deliverables. The intern will use various tools and develop campaign tracking codes, generate reporting and analysis, and analyze site traffic and search results. The intern will also have the opportunity to learn and understand new measurement methods and tools used to capture, assemble, and organize data into something meaningful.

Freelance Senior Designer, Digital

Company: Critical Mass

Location: Other US Location

Posted Mar 30, 2023

The text describes a Freelance Senior Designer role at Critical Mass, which involves crafting creative concepts, managing a team, and working with digital experiences. The role requires strong design skills, communication abilities, and a solid understanding of the Web and interactivity. The new hire is expected to work from an office at least 3 days a week to foster continuous learning, collaboration, and employee engagement.

Frequently Asked Questions

What is it like to work at Critical Mass?
Working at Critical Mass means joining a collaborative, data‑driven environment that values experimentation. You’ll participate in daily stand‑ups, bi‑weekly hackathons, and monthly tech talks. The team embraces remote‑first flexibility, but also meets weekly in the San Francisco office for design sprints. Employees receive a 100‑hour training stipend and can earn equity through a quarterly grant schedule. Open‑source contributions are encouraged and often recognized in performance reviews.
What types of positions does Critical Mass offer?
Critical Mass has openings across engineering, product, and operations. Popular roles include Senior Backend Engineer (Python/Golang), Machine Learning Engineer, Cloud Infrastructure Architect, Product Manager (Analytics), and Security Analyst (Threat Intelligence). The company also hires Data Engineers, Front‑end Engineers, UX Researchers, and DevOps Specialists. Each role offers a hybrid work model and a competitive benefits package.
How can I stand out as an applicant for Critical Mass?
Showcase a portfolio that demonstrates real‑time data processing or distributed system design. Contribute to the company’s open‑source projects on GitHub or publish a blog post about a relevant tech topic. Provide metrics in your resume—e.g., reduced latency by 30% or improved throughput by 50%. Highlight experience with Kubernetes, Apache Arrow, or large‑scale analytics. Prepare for the interview by mastering system design, coding challenges, and aligning your answers with the company’s mission of delivering fast, trustworthy insights to financial clients.

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