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.

Home Hospital Physician for Hybrid Work Model- Full Time and Part Time Opportunities

Company: Mass General Brigham Community Physicians

Location: Braintree, Massachusetts

Posted Oct 07, 2024

Mass General Brigham, a renowned healthcare system, is expanding its Home Hospital program and seeking innovative physicians. The Home Hospital Physician will provide acute care in patients' homes, collaborating with a multidisciplinary team. The role involves medical decision-making, patient evaluations, documentation, and oversight of the team. Full-time and part-time positions are available. Qualifications include Internal Medicine BC/BE, proficiency in inpatient medicine, virtual care, and multidisciplinary team-based care. The ideal candidate is open-minded, creative, team-oriented, and an expert communicator.

Home Hospital Physician for Hybrid Work Model- Full Time and Part Time Opportunities

Company: Mass General Brigham Community Physicians

Location: Newton, Massachusetts

Posted Oct 18, 2024

Mass General Brigham, a renowned healthcare system, is expanding its Home Hospital program and seeking innovative physicians. The Home Hospital Physician will provide acute care in patients' homes, collaborating with a multidisciplinary team. The role involves medical decision-making, patient evaluations, documentation, and oversight of the team. Full-time and part-time positions are available. Qualifications include Internal Medicine BC/BE, proficiency in inpatient medicine, virtual care, and multidisciplinary team-based care. The ideal candidate is open-minded, creative, team-oriented, and an expert communicator.

Otolaryngologist

Company: Mass General Brigham Community Physicians

Location: Somersworth, New Hampshire

Posted Oct 30, 2024

Wentworth-Douglass Hospital has partnered with Mass Eye and Ear to enhance their ENT practice, leveraging Mass Eye and Ear's top-tier reputation in ear, nose, and throat care. This collaboration aims to provide state-of-the-art medical and surgical care, specializing in upper respiratory illnesses, allergies, and sleep medicine. The Seacoast region of New Hampshire, known for its natural beauty and work-life balance, is the new location for this practice. Both institutions are committed to diversity, equity, and inclusion, and Wentworth-Douglass Hospital has been recognized for its outstanding patient experience.

Senior Developer, Front End

Company: Critical Mass

Location: Los Angeles, CA

Posted Oct 04, 2024

Critical Mass is looking for a Senior Developer to join their team. The job requires experience with React, JavaScript, and HTML5. The company offers competitive compensation and benefits packages, as well as a focus on diversity and inclusion.

Controls Subject Matter Expert

Company: Salute Mission Critical

Location: Atlanta, GA

Posted Oct 10, 2024

Salute is seeking a Controls Subject Matter Expert to join their team and drive relationships with hyperscale clients. The ideal candidate will contribute to daily operations support, quality initiatives, and possess a working understanding of electrical and mechanical systems.

Senior Developer, Front End

Company: Critical Mass

Location: South Bay

Posted Oct 05, 2024

The Critical Mass technology team is looking for an inspired motivated and experienced web developer to join their team. The role involves collaborating with design and UX, mentoring other frontend developers, and ensuring compatibility of code across devices and viewport sizes. The team culture thrives on a balance of collaboration and focused time, and they offer competitive benefits packages, vacation days, and more.

Account Receivable Specialist

Company: Salute Mission Critical

Location: Other US Location

Posted Oct 14, 2024

Salute is a global leader in delivering Data Center services, and they are looking to recruit an Account Receivable Specialist to join their team. The role requires a proactive approach to problem-solving, a keen eye for detail, and strong communication skills.

Senior Technology Lead (React)

Company: Critical Mass

Location: South Bay

Posted Oct 07, 2024

The job posting is for a Senior FrontEnd Technology Lead position at Critical Mass, a company that values diversity and inclusion. The role involves designing and writing code, performing code reviews, and mentoring junior teammates. The company offers competitive compensation and benefits packages, as well as opportunities for professional development and growth.

Family Medicine Physician

Company: Mass General Brigham Community Physicians

Location: Lee, New Hampshire

Posted Oct 18, 2024

Wentworth-Douglass Hospital, part of Mass General Brigham, is dedicated to patient care, research, teaching, and community service. It values diversity, equity, and inclusion, aiming to reflect the diversity of its patients. The hospital has received the Healthgrades 2021 Outstanding Patient Experience Award for eight consecutive years. It's one of the largest acute care hospitals in the Seacoast region of New Hampshire and Southern Maine. Wentworth-Douglass Hospital is currently seeking a full-time physician for its Lee Family Practice, offering family-centered primary care. The hospital is an Equal Opportunity Employer, committed to providing reasonable accommodations for all individuals with disabilities.

Palliative Care Physician

Company: Mass General Brigham Community Physicians

Location: Salem, Massachusetts

Posted Oct 18, 2024

Salem Hospital, a member of Mass General Brigham, is recruiting for a part-time Palliative Care Physician. The ideal candidate should be compassionate, collaborative, and an excellent communicator. The position offers a supportive work environment, professional growth opportunities, and a competitive salary with comprehensive benefits. Salem Hospital, recognized for its high-quality care, is located in Salem, Massachusetts, providing an exceptional lifestyle with coastal communities, recreation, and culture.

Gastroenterologist

Company: Mass General Brigham Community Physicians

Location: Braintree, Massachusetts

Posted Oct 18, 2024

Mass General Brigham's community division is recruiting a Board Certified or Board Eligible Gastroenterologist to join Harbor Medical Associates in Braintree, Massachusetts. The role involves providing inpatient and outpatient GI services, maintaining high clinical quality, and partnering with a multidisciplinary team. Benefits include a competitive salary, sign-on bonus, and a fully integrated EPIC medical record. Harbor Medical Associates is part of Mass General Brigham, a large integrated health care system.

CMMS Planner (Onsite)

Company: Salute Mission Critical

Location: Other US Location

Posted Oct 10, 2024

Salute is seeking a dynamic and experienced CMMS Planner to join their team and drive relationships with hyperscale clients. The role involves overseeing and scheduling vendors and local facilities teams, maintaining maintenance frequency and scope standards, and providing detailed reporting and analytics.

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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