we are tizens!

High Talent. Low Ego. Committed to Excellence. With grit and integrity, we move with a sense of urgency to advance innovative therapeutics to truly make a difference in the lives of patients with few or no treatment options.

We are an exceptional team focused on open communication and collaboration and dedicated to each other, our partners, and the medical community to rapidly execute on our patient-centric mission. Each day, we renew our commitment to maintaining an environment of respect, inclusion, transparency, candor, and excellence.

The Boston Globe Top Places To Work 2023 Massachusetts award

Career development is a key focus for all of us here at X4, ensuring that each of us can reach our full potential.

Pauline Dufresne
VP, Human Resources

Open Positions

If you think you’d be a good fit for X4, please click here to explore our open positions.

Apply Now
Image shows booths and tables at the X4 headquarters in Boston.
Image shows the X4 reception area decorated with a “Happy Fall” banner.

Benefits and Notices

United States

  • X4 is an equal opportunity employer and offers a comprehensive and competitive benefits package. Full-time employees are eligible for all benefits on their date of hire.
  • Health Plans
  • Dental Plan
  • 100% Employer Paid Life/ADD Insurance
  • 100% Employer Paid STD, LTD and Disability Insurance
  • 401(k) plan with Employer Match
  • Employee Stock Purchase Program
  • Competitive Vacation, Sick and PTO Benefits / 12 Paid Holidays / Year-End Holiday Shutdown
  • Summer Fridays
  • Parental Leave
  • Hybrid Work Location Benefit
  • Free Parking
  • Subsidized Commuter Benefit
  • 100% Employer Paid Enhanced Employee Assistance Program
  • Cell Phone and Internet Reimbursement

Transparency in Coverage – Blue Cross Blue Shield of MA


  • Employee Assistant Program
  • Employee Stock Purchase Plan
  • Food vouchers
  • Summer Fridays

Privacy notice for applicants of X4 Pharmaceuticals (Austria) GmbH in accordance with Article 13 of the General Data Protection Regulation (“GDPR”)

core values

Our core values define us and act as guideposts for our thoughts, behaviors, and decisions every day as we strive to innovate for patients.


Do all things with rigor.


Hold each other and ourselves accountable for our actions and to live our values.


Work together as a team aligned to achieve our goals and be respectful of each other.


Act with honesty and transparency.

sense of urgency

Demonstrate a higher sense of purpose: to alleviate human suffering and cure disease.


Move forward with firmness of mind and unyielding courage.

we are tizens!