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.

Travel Pediatric Physical Therapist - $2,100-2,400 per week

Company: Critical Connection, inc

Location: Sterling, Virginia

Posted Jan 24, 2025

Critical Connection, inc is advertising a 13-week travel job for a Pediatric Physical Therapist in Sterling, Virginia. The role is in an outpatient orthopedic pediatrics practice, offering competitive compensation, guaranteed 40 hours per week, and first-day health benefits. The travel take-home pay is $2000-$2200 per week, while local travel rates are $55-$60 per hour with 40 hours guaranteed. Benefits include 100% medical and dental coverage, housing stipend, meals and incidentals, weekly pay, $1200 for continuing education, 401K plan, and disability and life insurance. CCI emphasizes building long-term careers, understanding individual goals, and providing personalized service.

Travel Physical Therapist - $2,000-2,300 per week

Company: Critical Connection, inc

Location: Rowlett, Texas

Posted Jan 24, 2025

Critical Connection, inc is advertising a 13-week travel Physical Therapist position in Rowlett, Texas. The role is in an outpatient orthopedic practice treating an active and general orthopedic patient population. The travel take-home pay is $1900 - $2000 per week, and local travel rates are $50-$53 per hour with 40 hours guaranteed. Benefits include 100% medical and dental coverage, housing stipend, meals and incidentals, weekly pay, $1200 for continuing education, 401K plan, and disability and life insurance. The company emphasizes building solid relationships with therapists and nurses, and offers personalized career guidance.

Family Medicine Physicians Needed in Waltham, MA - Community Division of Mass General Brigham

Company: Mass General Brigham

Location: Waltham, Massachusetts

Posted Jan 23, 2025

Waltham Family Medicine, part of Mass General Brigham, is recruiting board certified or eligible Family Medicine or Med/Peds physicians for part-time or full-time positions in Waltham, MA. The practice offers competitive compensation, manageable panel sizes, a fully integrated EPIC platform, NP call service, a productive team-based environment, and collaboration for high-quality care. The position also provides streamlined access to the extensive MGB network, including Brigham and Women’s Hospital and Mass General Hospital.

Travel Certified Occupational Therapy Assistant - $1,800-2,000 per week

Company: Critical Connection, inc

Location: San Jose, California

Posted Jan 24, 2025

Critical Connection, inc is recruiting a travel Certified Occupational Therapy Assistant for a 13-week contract in San Jose, California. The role involves assisting in treating patients in a Skilled Nursing Facility under the supervision of an Occupational Therapist. CCI offers a competitive salary, benefits, CEU reimbursement, student loan repayment, and relocation assistance. Required qualifications include an Associate's Degree, National Certification, state licensure, CPR card, and relevant experience. Key skills include excellent customer service, communication, documentation, decision-making, teamwork, adaptability, time management, and active listening.

Outpatient Neurologist- Cooley Dickinson Medical Group- Northampton, MA

Company: Mass General Brigham

Location: Northampton, Massachusetts

Posted Jan 24, 2025

Cooley Dickinson Hospital, affiliated with Massachusetts General Brigham, is recruiting a BC/BE neurologist for their expanding ambulatory practice. The role involves providing general neurological care, including EEG and EMG, with potential for subspecialty focus. The hospital system, with a medical staff of around 500, includes Cooley Dickinson Hospital, Cooley Dickinson Medical Group, a VNA, and Hospice. Northampton, the location, is renowned for its vibrant arts and culture scene, educational opportunities, and high quality of life.

Gastroenterologist

Company: Mass General Brigham

Location: Braintree, Massachusetts

Posted Jan 24, 2025

Mass General Brigham's community division is looking for a Board Certified or Board Eligible Gastroenterologist to join Harbor Medical Associates in Braintree, Massachusetts. The successful candidate will provide inpatient and outpatient GI services, maintain high clinical quality, and collaborate 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 renowned health care system with a strong reputation for patient care.

Primary Care Physician, Concord, MA

Company: Mass General Brigham

Location: Concord, Massachusetts

Posted Jan 23, 2025

Mass General Brigham is recruiting a Primary Care Physician for an outpatient practice in Concord, Massachusetts. The position offers a supportive environment, competitive salary, comprehensive benefits, and flexible schedules. Concord, known for its New England charm, excellent schools, and strong community, is a desirable place to live. Mass General Brigham, a leader in healthcare innovation, provides opportunities for professional growth and patient-focused care.

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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