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.

Freelance Art Director

Company: Critical Mass

Location: Other US Location

Posted Nov 11, 2022

The job description is for an Art Director position at Critical Mass, requiring 4+ years of education and 2+ years of experience in design and interactive. The role involves conceptual development, execution, and leadership, with a focus on design and visual communication. The company offers mentorship, a strong digital portfolio, and a hybrid work model.

Freelance Designer

Company: Critical Mass

Location: Other US Location

Posted Nov 11, 2022

The job description is looking for a freelance designer with strong design portfolio, visual, interactive and graphic design skills, and experience in the latest design toolsets. The designer should be able to create interactive design concepts, design mood boards, and provide quality assurance on creative deliverables. The company is an equal opportunity employer committed to diversity and inclusion.

Freelance User Experience Designer

Company: Critical Mass

Location: Other US Location

Posted Nov 16, 2022

The job description is for a freelance UX Designer who will work on designing digital products for clients. The role requires strong communication and interpersonal skills, as well as experience with design tools and software. The ideal candidate will have a portfolio of work and a deep understanding of user experience and design principles.

Technology Lead

Company: Critical Mass

Location: Other US Location

Posted Dec 06, 2022

The job description is for a Technology Lead position that requires experience in HTML, CSS, React, and JavaScript. The role involves leading a team, collaborating with other teams, and ensuring high-quality work. The company is an equal opportunity employer and has a strong focus on diversity and inclusion.

Senior Search Strategist

Company: Critical Mass

Location: Other US Location

Posted Dec 19, 2022

The job description is for a Senior Search Strategist to work on an integrated SEO/SEM team, developing holistic search strategies, managing paid search campaigns, and providing data-driven insights to clients.

Executive Recruiter

Company: Critical Mass

Location: Other US Location

Posted Dec 02, 2022

Critical Mass is a global digital agency hiring an Executive Recruiter to focus on creating sourcing strategies and leading recruitment for executive-level opportunities globally. The role requires 5+ years of experience leading full-cycle recruitment, strong project and time management, and outstanding interpersonal, presentation, and communication skills.

Creative Senior Project Manager

Company: Critical Mass

Location: Portland OR

Posted Nov 16, 2022

The job description is for a Creative Senior Project Manager at Critical Mass. The role involves managing client relations, project delivery, and team communication. The company offers training, on-boarding, and employee experience to ensure long-term success.

Marketing Science Senior Analyst

Company: Critical Mass

Location: Other US Location

Posted Nov 10, 2022

The job description is looking for a Marketing Science Senior Analyst with intermediate to advanced Excel skills, experience with visualization platforms, and knowledge of statistical programming languages. The role involves working with clients, analyzing data, and providing insights. The company, Critical Mass, is an equal opportunity employer and offers a hybrid work model.

Creative Senior Project Manager

Company: Critical Mass

Location: Other US Location

Posted Nov 16, 2022

The job description is for a Creative Senior Project Manager at Critical Mass. The role involves managing client relations, project delivery, and team communication. The company offers training, on-boarding, and employee experience to ensure long-term success.

Senior Front End Developer

Company: Critical Mass

Location: Portland OR

Posted Nov 19, 2022

The job posting is looking for a Senior Front End Developer to join the Critical Mass technology team. The role requires experience with HTML5, CSS3, and JavaScript, as well as strong communication and collaboration skills. The company is an equal opportunity employer committed to diversity and inclusion.

Associate Digital Project Manager

Company: Critical Mass

Location: South Bay

Posted Nov 11, 2022

The job posting is for an Associate Digital Project Manager at Critical Mass, a company that focuses on digital project delivery. The role involves managing client relations, project excellence, and team collaboration. The company offers training, on-boarding, and employee experience to its new hires and employees.

Analytics Director

Company: Critical Mass

Location: Detroit, MI

Posted Nov 11, 2022

The job description is for an Analytics Director position at Critical Mass, requiring extensive experience in marketing science, data analysis, and team management. The ideal candidate will have a strong background in digital marketing, excellent communication skills, and a passion for mentoring and developing team members.

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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