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.

Senior Project Manager

Company: Critical Mass

Location: Chicago, IL

Posted Apr 12, 2023

The job description is for a Senior Project Manager role in managing digital projects, leading teams, and communicating with clients. The role requires experience in project management, leadership, and problem-solving skills. The company, Critical Mass, is committed to diversity and inclusion and does not tolerate discrimination.

Marketing Science (Data Analytics) Intern

Company: Critical Mass

Location: Los Angeles, CA

Posted Apr 13, 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 chance to try the digital agency world and work on tasks such as using web analytics, social media measurement tools, and developing tagging requirements. The intern will also work on data analysis, testing, and debugging code, and will have the opportunity to present analysis and results.

Marketing Science Intern

Company: Critical Mass

Location: Other US Location

Posted Apr 05, 2023

The Critical Mass Trailhead Internship Program is a 12-week program offering regular learning opportunities, mentorship, real client work, and a paid internship. The intern will work on various tasks such as using web analytics, social media, survey, and mobile measurement tools. They will also develop tagging requirements, perform data quality assurance, and use Excel, Tableau, or DW/BI reporting system management. The intern will have the opportunity to work with other agencies and develop and test campaign tracking codes. The internship runs from May 22-August 11, 2023, and is a fast-track to launch a career with regular learning opportunities and mentorship.

Creative Director, Copy

Company: Critical Mass

Location: New York City, NY

Posted Apr 11, 2023

The text describes a creative director role that involves leading marketing initiatives, developing creative solutions, and managing a team. The role requires strong strategic thinking, interpersonal skills, and a deep understanding of various design and marketing disciplines. The successful candidate will be expected to work from an office at least 3 days a week as part of a hybrid model.

Senior Marketing Science Analyst, Implementation

Company: Critical Mass

Location: Nashville, TN

Posted Apr 09, 2023

The text describes a Senior Marketing Science Analyst role at Critical Mass, focusing on tracking and measurement, data visualization, testing and evaluation, data integration, and statistical modeling. The role involves managing end-to-end analytics tracking, designing and leading measurement solutions, and providing oversight to project work. The candidate should have at least 3 years of experience in advanced analytical methods, data modeling, and model fine-tuning. They should also have experience with Adobe stack solutions and Google 360. The role requires working from an office at least 2 days a week and being part of a team focused on continuous learning, collaboration, and employee engagement.

Senior Marketing Science Analyst, Implementation

Company: Critical Mass

Location: Detroit, MI

Posted Apr 09, 2023

The text describes a Senior Marketing Science Analyst role with a focus on data analysis, measurement, and leadership. The role requires experience in advanced analytical methods, data modeling, and data visualization. The candidate should have experience with Adobe stack solutions and Google 360. The role is not eligible for hire in certain states and is committed to diversity and inclusion.

Account Coordinator

Company: Critical Mass

Location: Nashville, TN

Posted Apr 12, 2023

The Trailhead program at Critical Mass is a 12-week learning journey for new hires, focusing on understanding the company's work, client relationships, and digital marketing. The Summer 2023 cohort starts on June 5, 2023. The role of an Account Coordinator involves supporting the Client Services Team, managing client relationships, and coordinating meetings and travel. The position requires strong communication skills, attention to detail, and the ability to work independently and in a team.

Senior Designer

Company: Critical Mass

Location: South Bay

Posted Apr 09, 2023

This job posting is for a Senior Designer position at Critical Mass. The role involves crafting creative concepts, managing a team of designers, and working on digital experiences. The company values creativity, attention to detail, and leadership. They offer a competitive salary, benefits, and a commitment to diversity and inclusion.

Creative Director, Art

Company: Critical Mass

Location: New York City, NY

Posted Apr 11, 2023

The text describes a creative director role that involves leading marketing initiatives, developing visual and experience design, managing a creative team, and driving business growth. The role requires strategic thinking, strong communication skills, and a passion for design. The company values honesty, inspiration, drive, passion, and realness in its employees.

Junior Developer

Company: Critical Mass

Location: Other US Location

Posted Apr 05, 2023

The Trailhead program at Critical Mass is an 12-week learning journey for new developers to understand the company's work and integrate into the team. The Summer 2023 cohort starts on June 5, 2023. As a Junior Developer, you should have experience with HTML5, CSS3, and Vanilla JS. The role offers mentorship, experience with departments like Creative and UX, and a focus on responsive grid frameworks and templating engines. The job requires problem-solving skills and experience with React, npm, gulp, and grunt.

Future Opportunity - Search Lead

Company: Critical Mass

Location: Other US Location

Posted Apr 11, 2023

The text describes a role in search marketing where the individual will manage and grow a team, define success metrics, pitch new projects, collaborate with multidisciplinary teams, and optimize across multiple channels. The role requires strong analytics skills, content strategy, and understanding of technical SEO. The individual should be comfortable with presenting, data storytelling, and continuous learning.

Senior Marketing Science Analyst, Implementation

Company: Critical Mass

Location: Chicago, IL

Posted Apr 09, 2023

The text describes a Senior Marketing Science Analyst role at Critical Mass, focusing on tracking and measurement, data visualization, testing and evaluation, data integration, and statistical modeling. The role involves managing end-to-end analytics tracking, designing and leading measurement solutions, and providing oversight to project work. The candidate should have at least 3 years of experience in advanced analytical methods, data modeling, and model fine-tuning. They should also have experience with Adobe stack solutions and Google 360. The role requires working from an office at least 2 days a week and being part of a team focused on 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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