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 Analyst, Implementations

Company: Critical Mass

Location: Other US Location

Posted Sep 23, 2022

The job description is looking for a Marketing Science Senior Analyst with experience in data science, analytics tracking, and leadership. The role involves managing end-to-end analytics tracking, designing measurement solutions, and providing guidance to junior analysts.

Senior Developer

Company: Critical Mass

Location: Other US Location

Posted Sep 25, 2022

The Critical Mass technology team is looking for an inspired, motivated, and experienced web developer to join their team. The role involves working on Nissan and Infiniti projects, using the latest technologies, and collaborating with designers and UX experts. The company values diversity and inclusion and is an equal opportunity employer.

SVP, Client Partner

Company: Critical Mass

Location: Brooklyn NY

Posted Sep 25, 2022

The Senior Vice President, Client Partner is a seasoned leader who guides multiple teams to create amazing work, drive a profitable business, and maintain great team morale. The role requires building a successful team around a client's needs, skills, and budget, and delivering excellence for the client.

Art Director

Company: Critical Mass

Location: South Bay

Posted Sep 28, 2022

The job description is for a Senior Art Director, Interactive Product, requiring 8-10 years of experience in visual design for the web, with a diverse portfolio and strong knowledge of interactive creative development processes.

SEO Lead

Company: Critical Mass

Location: Other US Location

Posted Sep 24, 2022

The job description is for an SEO Lead who will manage a team of search marketers, develop data-driven digital strategies, and own the scoping, pitching, and execution of SEO strategies. The ideal candidate has 7-10 years of search experience, strong presentation skills, and experience managing large-scale website migrations and redesigns.

Art Director

Company: Critical Mass

Location: Other US Location

Posted Sep 24, 2022

The job description is for an Art Director position at Critical Mass, a creative agency. The role involves conceptual development, execution of creative deliverables, and leadership experience. The ideal candidate has a strong design portfolio, experience leading a team, and a passion for design and visual communication.

Marketing Science Lead

Company: Critical Mass

Location: Other US Location

Posted Sep 28, 2022

The job description is looking for a Marketing Science Lead with expertise in data science, team management, and communication. The role involves leading a team, delivering complex projects, and providing thought leadership. The job requires strong technical skills, including experience with ML algorithms, Python, and R, as well as excellent communication and presentation skills.

Associate Media Director

Company: Critical Mass

Location: Chicago IL

Posted Oct 05, 2022

The job description is for an Associate Media Director who will define, manage, and execute online media strategy, build strong client relationships, and identify high impact opportunities for developing breakthrough customer insights.

Interactive Art Director

Company: Critical Mass

Location: Silicon Valley CA

Posted Sep 24, 2022

The job posting is for an Interactive Art Director position at Critical Mass, a company that creates applications for one of the world's most trafficked websites. The role involves conceptual development and execution of creative deliverables, balancing creative thinking with interpersonal skills, and leading a team of designers. The company values diversity and inclusion and offers mentorship and leadership opportunities.

Senior Copywriter

Company: Critical Mass

Location: South Bay

Posted Sep 23, 2022

The job posting is for a Senior Copywriter position at Critical Mass, a company that creates digital experiences for clients. The ideal candidate has 5-8 years of experience as a copywriter, exceptional writing skills, and a strong understanding of UX/UI concepts and practices.

Senior GraphQL Developer

Company: Critical Mass

Location: Other US Location

Posted Oct 05, 2022

Critical Mass is looking for a Senior Web Developer to join their team. The role involves collaborating with designers and UX to prototype user interactions, mentoring other front-end developers, and ensuring compatibility across devices. The team uses the latest technologies, including React, GraphQL, and Gatsby, to deliver innovative and responsive experiences.

Senior Developer

Company: Critical Mass

Location: Portland OR

Posted Sep 25, 2022

The Critical Mass technology team is looking for an inspired, motivated, and experienced web developer to join their team. The role involves working on Nissan and Infiniti projects, using the latest technologies, and collaborating with designers and UX experts. The company values diversity and inclusion and offers remote work options.

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.

Other Companies Hiring

© 2026 Job Transparency. All rights reserved.