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.

Intermediate Developer

Company: Critical Mass

Location: Other US Location

Posted Sep 21, 2022

The job description highlights the importance of using modern front-end frameworks and digital pattern libraries to rapidly prototype with code. The candidate is expected to have experience in development with hand-coding advanced HTML, CSS, HTML5, CSS3, and JavaScript, as well as proficiency in Semantic HTML Markup and Accessibility knowledge (WCAG 2.0 Level AA).

Financial Analyst

Company: Critical Mass

Location: Chicago IL

Posted Sep 21, 2022

Critical Mass is looking for a self-motivated Financial Analyst with strong interpersonal skills. The job involves reviewing financial results, managing client invoices, and forecasting budgets. The company offers competitive benefits, remote work options, and a diverse and inclusive work environment.

Design Director

Company: Critical Mass

Location: Silicon Valley CA

Posted Sep 18, 2022

The job description highlights the importance of creativity, design systems, and collaboration. The ideal candidate should have experience in a lead design role, strong working knowledge of Figma, and the ability to thrive in a fast-paced environment.

Senior Front End Developer

Company: Critical Mass

Location: Portland OR

Posted Sep 22, 2022

The Critical Mass technology team is looking for a senior web developer to join their team. The role involves collaborating with design and UX, mentoring other developers, and ensuring code compatibility across devices. The team uses the latest technologies and focuses on delivering reusable, innovative, and responsive experiences.

Senior User Experience Designer

Company: Critical Mass

Location: South Bay

Posted Sep 19, 2022

The job description is for a Senior User Experience Designer at Critical Mass. The role involves designing digital products, working closely with other disciplines, and owning areas of work from design to completion. The ideal candidate has 8+ years of experience in UX, product design, or related fields, and possesses effective communication and interpersonal skills.

Project Manager

Company: Critical Mass

Location: Other US Location

Posted Sep 21, 2022

The job description is looking for a Project Manager with experience in digital project delivery, client relations, and team management. The ideal candidate has strong communication, leadership, and decision-making skills, and is passionate about working with globally admired brands.

Technology Director

Company: Critical Mass

Location: Other US Location

Posted Sep 18, 2022

The job description is for a Technology Director who will oversee technical aspects of projects, support a team of developers, and have an unparalleled enthusiasm for technology. The role requires experience in architecting and delivering secure web solutions, experience with various technologies, and ability to work effectively in a multi-disciplinary environment.

Account Manager - Contract

Company: Critical Mass

Location: Nashville, TN

Posted Sep 21, 2022

The job posting is for an Account Manager position at Critical Mass, a company that offers a range of benefits and opportunities for growth. The role involves managing client relationships, leading project teams, and providing strategic guidance. The company values diversity and inclusion and offers a range of perks and benefits.

Program Director

Company: Critical Mass

Location: Portland OR

Posted Sep 19, 2022

The job description is looking for a Program Director with experience in managing multidisciplinary teams, delivering digital experiences, and driving excellence. The role requires strong project management skills, ability to communicate effectively, and a passion for digital project delivery.

Freelance Senior Art Director

Company: Critical Mass

Location: Chicago IL

Posted Sep 19, 2022

The job description is for a Senior Art Director position at Critical Mass, a company that values diversity and inclusion. The role involves leading a team of designers, copywriters, and other creatives to develop innovative design solutions. The ideal candidate has a strong design portfolio, experience leading a team, and excellent communication skills.

Senior Front End Developer

Company: Critical Mass

Location: Chicago IL

Posted Sep 22, 2022

The Critical Mass technology team is looking for a Senior Front-End Developer to join their team. The position requires experience with React, ES6 JavaScript, and other modern technologies. The team is committed to diversity and inclusion in the workplace.

Art Director

Company: Critical Mass

Location: Chicago IL

Posted Sep 23, 2022

The job description is for a Digital Art Director position at Critical Mass, a company that values diversity and inclusion. The role involves leading a team of designers, copywriters, and other creatives to develop innovative design solutions. The ideal candidate has a strong digital design portfolio, experience leading a team, and excellent communication skills.

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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