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.

Account Director

Company: Critical Mass

Location: Seattle WA

Posted Oct 21, 2022

The job description is for an Account Director who manages and grows client relationships, provides strategic direction, and leads internal teams. The ideal candidate has 5-10 years of experience in account management, digital marketing, and user experience.

Account Director

Company: Critical Mass

Location: Brooklyn NY

Posted Nov 08, 2022

The job description is for an Account Director position at Critical Mass, requiring 5-10 years of experience in digital marketing, user experience, and product design. The role involves managing client relationships, leading internal teams, and developing strategic plans. The salary range is $130,000 to $160,000.

Freelance Art Director

Company: Critical Mass

Location: Other US Location

Posted Oct 31, 2022

The job description is for a Freelance Art Director who will lead a team of designers, copywriters, and other specialists to create innovative design solutions. The role requires strong design portfolio, leadership experience, and ability to work on multiple projects simultaneously.

Financial Analyst

Company: Critical Mass

Location: Other US Location

Posted Oct 25, 2022

Critical Mass is looking for a self-motivated and resourceful Financial Analyst with strong interpersonal skills. The job involves managing financial duties, working with clients, and mentoring team members.

Digital Project Manager

Company: Critical Mass

Location: Other US Location

Posted Oct 26, 2022

The job description is for a Project Manager who is creative, strategic, and passionate about digital project delivery. The role involves managing client relations, project delivery, and team tracking, with a focus on delivering excellent results and driving client success.

Paid Search Strategist

Company: Critical Mass

Location: Other US Location

Posted Oct 23, 2022

The Paid Search Strategist is responsible for managing Paid Search accounts, providing expertise in campaign optimization, and serving as a trusted advisor on SEM. The role requires strong communication skills, ability to work in a constantly evolving industry, and capability to recommend new strategies.

Associate Director, Human Resources Manager

Company: Critical Mass

Location: Silicon Valley CA

Posted Oct 27, 2022

Critical Mass is hiring an Associate Director, Human Resources Manager to lead and support employee development in the west market. The role involves strategic partnership, talent planning, performance management, and HR operations. The company is committed to diversity and inclusion and offers a hybrid work model.

Senior Analyst, Data Engineering

Company: Critical Mass

Location: Chicago IL

Posted Oct 19, 2022

The job description is for a Senior Analyst position at Critical Mass, requiring experience in marketing science, data engineering, and analytics. The role involves creating and maintaining databases, implementing tracking and data gathering strategies, and providing data-driven insights to clients.

Senior Account Manager

Company: Critical Mass

Location: Silicon Valley CA

Posted Oct 31, 2022

The job description is for a Senior 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.

Senior Account Manager

Company: Critical Mass

Location: Brooklyn NY

Posted Oct 29, 2022

The job description is for a Senior Account Manager position at Critical Mass, a company that offers a range of benefits and a competitive salary range. 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.

Senior Marketing Science Analyst, Implementation

Company: Critical Mass

Location: Silicon Valley CA

Posted Nov 03, 2022

The job description is looking for a Senior Marketing Science Analyst to manage end-to-end analytics tracking, design measurement solutions, and provide guidance to junior analysts. The ideal candidate has experience with tag management systems, digital analytics tracking, and Adobe stack solutions.

Marketing Science Analyst

Company: Critical Mass

Location: Other US Location

Posted Nov 10, 2022

The job description highlights the opportunities for growth and development as a Marketing Science Analyst at Critical Mass. The company emphasizes the importance of collaboration, continuous learning, and employee engagement, and offers a hybrid work model that balances individual flexibility with team collaboration.

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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