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 Developer, Front End

Company: Critical Mass

Location: South Bay

Posted Sep 10, 2024

The job posting is for a Senior Developer position at Critical Mass, an experience design agency. The job requires experience with React, JavaScript, and other technologies, as well as strong communication and troubleshooting skills. The company offers competitive benefits and a diverse work environment.

Senior Designer

Company: Critical Mass

Location: South Bay

Posted Sep 12, 2024

The Senior Designer is responsible for executing complex visual design deliverables and leading the implementation of design solutions for marketing and digital experiences. The role requires strong design skills, collaboration, and communication.

Senior Java Developer

Company: Critical Mass

Location: South Bay

Posted Sep 12, 2024

The job posting is for a Senior BackEnd Java Developer position at Critical Mass, a company that values diversity and inclusion. The job requires experience in software development, Java, and various technologies. The company offers competitive compensation and benefits packages, as well as opportunities for growth and development.

Email Developer - 4766

Company: Critical Mass

Location: Other US Location

Posted Sep 07, 2024

The job posting is for an Email Developer ED position at Critical Mass, a company that values diversity and inclusion. The ED will be responsible for designing and writing code for responsive email designs, working with the design team, and providing support to other email developers. The company offers competitive benefits, vacation time, and internal learning and development programs.

Senior Front End Developer - 4904

Company: Critical Mass

Location: South Bay

Posted Sep 07, 2024

The job posting is for a Senior FrontEnd Developer position at Critical Mass, a company that values diversity and inclusion. The job requires advanced English proficiency, experience with FrontEnd technologies, and knowledge of recent development practices. The company offers competitive compensation and benefits packages, as well as opportunities for professional growth and development.

Freelance Senior Copywriter, Future Opportunity

Company: Critical Mass

Location: Chicago, IL

Posted Sep 08, 2024

The job posting is for a Freelance Senior Copywriter position at Critical Mass, a company committed to diversity and inclusion. The job requires experience in copywriting, creative thinking, and attention to detail. The company is looking for a candidate with a strong understanding of marketing and advertising principles.

Senior DevOps

Company: Critical Mass

Location: Other US Location

Posted Sep 08, 2024

The job posting is for a Senior DevOps Engineer role at Critical Mass, a company that values diversity and inclusion. The role involves working with geographically and technically diverse teams, building and operating client production environments, and mentoring junior team members. The company offers competitive benefits packages, vacation days, and internal learning and development programs.

Project Manager, Social Campaigns

Company: Critical Mass

Location: Portland, OR

Posted Sep 11, 2024

The job posting is for a Project Manager position at Critical Mass, a company that values diversity and inclusion. The job requires experience in digital project delivery, client relations, and team management. The company offers a competitive salary range of $65,000 to $90,000 CAD and a positive work environment.

Back End Developer

Company: Critical Mass

Location: Other US Location

Posted Sep 12, 2024

The job posting is for a Backend Java Developer position at Critical Mass, a company that values diversity and inclusion. The job requires experience with Java, Spring Boot, and other technologies, as well as collaboration and communication skills. The company offers competitive benefits and a positive work environment.

Project Manager, Social Campaigns

Company: Critical Mass

Location: Los Angeles, CA

Posted Sep 11, 2024

The job description is for a Project Manager position at Critical Mass, a company that values diversity and inclusion. The role involves managing client relations, ensuring project excellence, and working with a nimble team. The ideal candidate has 4+ years of experience in digital project management, strong communication and leadership skills, and experience with project management tools.

Backend Java Developer

Company: Critical Mass

Location: South Bay

Posted Sep 12, 2024

The job posting is for a Backend Java Developer position at Critical Mass, a company that values diversity and inclusion. The job requires experience with Java, Spring Boot, and other technologies, as well as collaboration and communication skills. The company offers competitive benefits and a positive work environment.

Project Manager, Social Campaigns

Company: Critical Mass

Location: Other US Location

Posted Sep 11, 2024

The job description is for a Project Manager position at Critical Mass, a company that values diversity and inclusion. The role involves managing client relations, ensuring project excellence, and working with a nimble team. The ideal candidate has experience in digital project delivery, strong communication skills, and a passion for working with globally admired brands.

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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