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.

Group Creative Director

Company: Critical Mass

Location: Other US Location

Posted Jul 15, 2024

As a Group Creative Director, you will lead large teams to creative excellence, drive creative discipline, and advocate for clients, teams, and the agency. You will have 6+ years of experience as a creative director or lead, exceptional writing skills, and a love for digital and social media. You will also be expected to work from an office a minimum of 4 days a week.

Business Development Coordinator

Company: Critical Mass

Location: New York City, NY

Posted Jul 10, 2024

The Business Development Coordinator will work with the business development team to assemble new business RFIs, RFPs, and presentation responses. The role requires strong communication and writing skills, attention to detail, and ability to work well under pressure. The position offers opportunities for job growth and executive level exposure, and is open to candidates with agency experience, preferably with a 4-year degree.

Campaign Engineer

Company: Critical Mass

Location: South Bay

Posted Jul 10, 2024

The Email Campaign Manager (ECM) is responsible for designing and writing code, performing code reviews, and developing technical documentation. They will work closely with clients, developers, and other stakeholders to implement email campaigns, manage ESP access, and monitor campaign deployments.

Campaign Engineer

Company: Critical Mass

Location: Other US Location

Posted Jul 10, 2024

The Email Campaign Manager (ECM) is responsible for designing and writing code, performing code reviews, and developing technical documentation. They will work closely with clients, developers, and other stakeholders to implement email campaigns, manage ESP access and roles, and monitor campaign deployments and deliverability.

Copywriter, Web

Company: Critical Mass

Location: Other US Location

Posted Jul 01, 2024

The text describes a Copywriter position at Critical Mass, a renowned agency. The role involves collaborating with creatives and strategists, creating copy for various platforms, and working on high-profile brands. The ideal candidate should have 2-4 years of agency experience, strong writing skills, and the ability to handle multiple projects. Critical Mass emphasizes employee development, offering training, mentorship, and a positive work environment. They expect employees to work from the office at least 4 days a week to foster learning, collaboration, and engagement. The company is committed to diversity, equity, and inclusion, and does not tolerate discrimination.

Senior Developer, React

Company: Critical Mass

Location: South Bay

Posted Jun 30, 2024

Critical Mass, an experience design agency, is seeking an experienced web developer. The role involves collaborating with design and UX teams, mentoring other developers, ensuring code compatibility, and optimizing web performance and accessibility. The company offers advanced training, mentorship, and a focus on employee experience. The ideal candidate should have strong English skills, expertise in JavaScript and React, and proficiency in HTML5, CSS3, and Git. Critical Mass is committed to diversity and inclusion.

Project Manager (Onsite)

Company: Salute Mission Critical

Location: Other US Location

Posted Aug 10, 2024

Salute is a leading provider of data center infrastructure services seeking a dynamic project manager to join their team. The project manager will be responsible for managing strategic account projects, coordinating travel, and ensuring budgets are met.

Future Marketing Science Openings

Company: Critical Mass

Location: Other US Location

Posted Jul 15, 2024

Critical Mass is a digital experience design agency that focuses on making complex things simple for clients and customers. They are looking for Marketing Science professionals and value honesty, driven behavior, and equality. They expect new hires to work from an office at least 4 days a week and are committed to diversity and inclusion.

3D Artist Lead - Contract

Company: Critical Mass

Location: Other US Location

Posted Jul 01, 2024

Critical Mass is seeking a Lead 3D Artist to supervise the entire 3D production pipeline, from CAD/intake to high-fidelity 3D renders. The role requires expertise in various 3D platforms, particularly Unreal Engine, and in-depth knowledge of its visual development tracks and technical capabilities. The Lead 3D Artist will collaborate with the creative team, 3D Artists, UE Artists, and UE Developers, conducting technical and quality audits of the 3D production process. The primary responsibilities include articulating creative and art direction, overseeing 3D Visual Development, and delivering exceptional, photorealistic, high-end cinematic renderings. The ideal candidate should be fluent in English, proficient in Unreal Engine 4, and have experience with Maya, Cinema 4D, SolidWorks, Rhino, or AutoCAD. Critical Mass offers competitive benefits, including maternity and parental leave, vacation, sick days, and access to online services for families. The company is committed to diversity and inclusion, with a target of achieving at least 50% representation from underrepresented communities.

Junior Email Campaign Manager

Company: Critical Mass

Location: South Bay

Posted Jul 01, 2024

Critical Mass is seeking an Email Campaign Manager (ECM) with extensive experience in high-volume email marketing operations, proficiency in ESP platforms like Salesforce Marketing Cloud and Adobe Campaign, and expertise in HTML, CSS, and responsive design. The ECM will design and code email campaigns, manage deployment calendars, monitor deliverability, and serve as the primary point of contact for ESP-related queries. The role involves close collaboration with various teams and stakeholders, and requires strong communication skills. Critical Mass offers competitive benefits, including maternity/parental leave, diverse learning programs, and a commitment to diversity and inclusion. The company expects employees to work from the office at least 3 days a week.

Future Media Openings

Company: Critical Mass

Location: Other US Location

Posted Jul 15, 2024

Critical Mass is a digital experience design agency seeking talented individuals in Media, including Media Directors, Supervisors, Planners, Ads Ops, and more. They value honesty, driven behavior, and equality, and offer a hybrid work model with a minimum of 3 days in the office. They are an equal opportunity employer committed to diversity and inclusion.

UX Writer

Company: Critical Mass

Location: South Bay

Posted Jul 10, 2024

UX Writer with 35+ years of experience, seeking a challenging opportunity to collaborate with creatives and strategists to build enjoyable and intuitive online experiences. Expertise in copywriting, marketing, and advertising principles, with a strong understanding of Web trends and technologies.

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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